METAL COOKING SUPPORT SUITABLE FOR INDUCTION HEATING

Abstract

- The invention relates to a metallic cooking support (10) compatible with induction heating, having a cooking face and a heating face (12), comprising a metallic substrate (2) made of aluminum or aluminum alloy, and an expanded metal insert (3) made of ferromagnetic material, said expanded metal insert (3) being inserted at least partially into the metallic substrate (2) on the side of the heating face (12), the expanded metal insert (3) having an inter-strand opening diameter.- According to the invention, the expanded metal insert (3) has in its central portion a central opening (38) and / or at least one non-central opening (32), having an opening cross-section at least equal to twice the inter-strand opening diameter, preferably at least equal to three times the inter-strand opening diameter, preferably again at least equal to four times the inter-strand opening diameter, and most preferably at least equal to five times the inter-strand opening diameter. - The invention also relates to a cooking article and an electric cooking appliance comprising such a metallic cooking support (10). - Figure for the abstract: Figure 1.

Description

Title of the invention: METAL COOKING SUPPORT THAT CAN BE HEATED BY INDUCTION

[0001] The present invention relates to the technical field of metallic cooking supports compatible with induction heating, for cooking or reheating food. Such metallic cooking supports can be used with an induction heating device such as a freestanding or integrated induction hob, or an induction heating element integrated into an electric cooking appliance.

[0002] The present invention relates in particular, but not exclusively, to metallic cooking supports forming a cooking container.

[0003] The present invention also relates to cooking articles comprising a metal cooking support associated with at least one gripping member. If desired, the gripping member(s) may be removable or detachable from the metal cooking support.

[0004] The present invention also relates to electric cooking appliances comprising a metallic cooking support associated with an induction heating device.

[0005] It is known to produce cooking articles comprising a metallic body made of aluminium, which are compatible with induction heating, using a metallic insert made of ferromagnetic metal assembled with the base of said metallic body.

[0006] Document EP0509860 describes, for example, in the embodiment illustrated in Figure 12, a metal insert in the form of a perforated sheet. Such a construction makes it possible to produce cookware compatible with induction heating, which heats satisfactorily.

[0007] One drawback of this type of embodiment, however, lies in the fact that it requires a press with a relatively high impact tonnage to properly assemble the metal body with the insert. Another drawback of this type of embodiment lies in the difficulty of reducing the thickness of the metal body below 3 mm while maintaining acceptable deformations of the base over time.

[0008] Document EP0509860 also describes, in the embodiment illustrated in Figure 15, a metallic insert made of expanded metal. However, this document proposes fixing this metallic insert to the surface of a metallic substrate with a die-forming operation to embed said insert at least partially within said substrate. surface.

[0009] One drawback of this embodiment lies in the difficulty of pre-crimping such a metal insert made of expanded metal onto the surface of the metal substrate before performing a stamping operation for final assembly. If pre-crimping is performed on the free edge of the expanded metal insert, or in other words, on the periphery of the expanded metal insert, the attachment points made on the periphery of said metal insert will generate surface defects, because during final assembly the stamping operation causes radial slippage of the aluminum on the metal substrate under the pressure of the press.If a pre-crimped seam is made on the surface of the expanded metal insert, rather than on the free edge of said metal insert, the pressure to be applied may locally degrade said metal insert, and / or the metal substrate, particularly when it is coated, and / or may locally harden the metal substrate, which also generates appearance defects.

[0010] Various aspects of the present invention aim to remedy the drawbacks of the prior art by providing a metallic cooking support compatible with induction heating, which is easy to manufacture, and which is free from aesthetic defects.

[0011] A first aspect of the present invention relates to a metallic cooking support compatible with induction heating, having a cooking face and a heating face, comprising a metallic substrate made of aluminum or aluminum alloy, and an expanded metal insert made of ferromagnetic material, said expanded metal insert being inserted at least partially into the metallic substrate on the side of the heating face, the expanded metal insert having an inter-strand opening diameter, due to the fact that the expanded metal insert has in its central portion a central opening and / or at least one non-central opening, having an opening cross-section at least equal to twice the inter-strand opening diameter, preferably at least equal to three times the inter-strand opening diameter, preferably again at least equal to four times the inter-strand opening diameter,preferably at least five times the inter-strand opening diameter. These arrangements allow the expanded metal insert to be pre-crimped onto the metal substrate by locally deforming the expanded metal insert over at least a portion of said central opening and / or said at least one non-central opening. The highly deformable nature of expanded metal makes this pre-crimping operation easy. Since the inter-strand opening diameter of the expanded metal insert is smaller than the smallest dimension of said central opening and / or said at least one non-central opening, the expanded metal insert will necessarily present the free strand portions in said central opening and / or , said at least one non-central opening, which can be deformed to be inserted into the metal substrate during the pre-crimping operation. The metal substrate will then be visible in said central opening and / or said at least one non-central opening. However, since the inductors intended for induction heating have an annular geometry, the creation of said central opening and / or said at least one non-central opening does not affect the induction heating performance. The hammering operation for the final assembly of the expanded metal insert and the metal substrate can then be carried out with proper support for the two parts to be assembled.

[0012] The heating face may have a depressed area in which at least part of said at least one non-central opening extends. Such an arrangement makes it possible to conceal defects resulting from the pre-crimping operation.

[0013] Said at least one non-central opening may extend entirely into the depressed area. Such an arrangement makes it easier to conceal defects resulting from the pre-crimping operation.

[0014] The depressed area can be annular. This arrangement makes it easier to create the depressed area.

[0015] The depth of the depressed area can be between 0.1 and 0.5 mm, preferably between 0.2 and 0.4 mm.

[0016] The expanded metal insert may have several non-central openings in its central portion, preferably at least three, having an opening cross-section at least equal to twice the inter-strand opening diameter, preferably at least equal to three times the inter-strand opening diameter (OB), preferably again at least equal to four times the inter-strand opening diameter, and most preferably at least equal to five times the inter-strand opening diameter. These arrangements facilitate the pre-crimping operation, as the various non-central openings have free edges of different orientations, which are deformed to perform the pre-crimping, thus improving the mechanical strength of the assembly.

[0017] The non-central openings can be more elongated in the radial direction than in the transverse direction. These arrangements allow for better mechanical strength of the expanded metal insert while facilitating its pre-crimping.

[0018] The metal cooking support may include at least 6 non-central openings, and preferably 12 non-central openings. These arrangements facilitate the pre-crimping process.

[0019] The non-central openings can be distributed in an annular area of ​​the expanded metal insert. This arrangement allows a central area of ​​the metal cooking rack.

[0020] The non-central openings can be regularly distributed around a central area of ​​the expanded metal insert. This arrangement facilitates pre-crimping.

[0021] The expanded metal insert may have a central opening having an opening section at least equal to twice the inter-strand opening diameter, preferably at least equal to three times the inter-strand opening diameter, preferably still at least equal to four times the inter-strand opening diameter, preferably at least equal to five times the inter-strand opening diameter.

[0022] The metallic substrate may, in particular, have a substrate thickness of 3.4 mm or less, preferably 3 mm or less, and even more preferably 2.5 mm or less. Compared to an insert made of a perforated plate, the use of an insert made of expanded metal reduces the forces required to embed the insert in the metallic substrate, thus reducing the thickness of the metallic substrate.

[0023] If desired, the metallic substrate can be made of recycled alloy. Recycled alloys are indeed harder than corresponding new alloys.

[0024] The expanded metal insert can in particular be made of ferritic stainless steel, preferably type 430 stainless steel. Other ferromagnetic materials can however be considered for making the expanded metal insert, in particular aluminized steels, these materials having a non-stainless steel substrate covered with aluminum on both sides.

[0025] The metal cooking support may have a base configured to rest on an induction heating device.

[0026] According to one embodiment, the background is flat.

[0027] A side wall can rise around the bottom to form a cooking container.

[0028] The metal substrate may have a non-stick coating forming a cooking surface on the cooking face. The non-stick coating may, in particular, be a PTFE-type coating, a ceramic-type coating, a sol-gel-type coating, a silicone resin-based coating, or a silicone-polyester resin-based coating. The non-stick coating may be single-layer or multi-layer. If desired, other non-stick coatings compatible with food contact may be considered.

[0029] The metallic substrate and the expanded metal insert may have a protective coating forming a heating surface for the heating face. The protective coating may, in particular, be a PTFE-type coating, an enamel-type coating, a lacquer-type coating, a ceramic-type coating, a sol-gel-type coating, a silicone resin-based coating, or a coating silicone-polyester resin based. The protective coating can be single-layer or multi-layer. Other protective coatings can be considered if desired.

[0030] A second aspect of the present invention relates to a cooking article comprising a metal cooking support and a gripping member mounted on the metal cooking support, in which the metal cooking support conforms to at least one of the aforementioned characteristics.

[0031] A third aspect of the present invention relates to an electric cooking appliance comprising a metallic cooking support associated with an induction heating element, in which the metallic cooking support conforms to at least one of the aforementioned characteristics.

[0032] Other features and attributes of the present invention will become more apparent upon reading the following detailed description of embodiments and variants, taken by way of no limitation, illustrated in the accompanying figures, in which:

[0033] Fig. 1 represents a bottom view of an example of an embodiment of a metal cooking support according to the invention.

[0034] Fig. 2 represents a partial schematic view of an expanded metal insert used in the metal cooking support illustrated in Fig. 1.

[0035] Fig. 3 represents a schematic overview of the expanded metal insert shown in Fig. 2, used in the metal cooking support shown in Fig. 1.

[0036] Fig. 4 represents a partial schematic cross-sectional view of the metal cooking support illustrated in Fig. 1.

[0037] Fig. 5 represents a partial schematic cross-sectional view of a metal cooking support comprising the expanded metal insert illustrated in Figures 2 and 3.

[0038] Fig. 6 represents a schematic elevation and cross-sectional view of an example of an embodiment of a culinary article comprising a metal cooking support according to the invention.

[0039] Fig. 7 represents a schematic elevation and cross-sectional view of an example of an embodiment of an electric cooking appliance comprising a metallic cooking support according to the invention.

[0040] Figure 1 illustrates an example of an embodiment of a metal cooking support 10 compatible with induction heating. The metal cooking support 10 has a cooking surface 11 and a heating surface 12. The heating surface 12 has a base 13 configured to rest on an induction heating device. Depending on the induction heating device used, the base 13 may be flat or not, for example, domed.

[0041] The heating face 12 has a depressed area 33 relative to the part The main feature of the bottom 13 is visible in [Fig. 1]. More specifically, in the embodiment illustrated in [Fig. 1], the depressed area 33 is annular. The depressed area 33 is surrounded by an external area 36 of the bottom 13. The depressed area 33 surrounds an internal area 37 of the bottom 13. The depth of the depressed area 33 is advantageously between 0.1 and 0.5 mm, preferably between 0.2 and 0.4 mm. The depth of the depressed area 33 is, for example, 0.3 mm.

[0042] The metal cooking support 10 comprises a metal substrate 2 made of aluminum or aluminum alloy. The metal substrate 2 may, in particular, be made of recycled alloy, such alloys being usually harder than corresponding new alloys.

[0043] The metal cooking support 10 includes an expanded metal insert 3 made of a ferromagnetic material, advantageously ferritic stainless steel. The expanded metal insert 3 may, in particular, be made of type 430 stainless steel. The expanded metal insert has a mesh network of strands 30 defining interstrand openings 31.

[0044] As best seen in [Fig.2], the expanded metal insert 3 has a strand thickness EB, a strand width LB, and an inter-strand opening diameter OB. The expanded metal insert 3 also has a frontal transparency corresponding to the ratio of the open area between the strands to the total area.

[0045] As shown in [Fig. 1] and [Fig. 3], the expanded metal insert 3 has a central opening 38. The central opening 38 encompasses the geometric center of the expanded metal insert 3. However, the central opening 38 is not necessarily centered on the geometric center of the expanded metal insert 3. In the embodiment illustrated in the figures, the central opening 38 is circular. The central opening 38 has a diameter of approximately 10 mm. As an alternative, other geometries can be considered for the central opening 38, for example, an elongated geometry or a multi-branch geometry. Preferably, the central opening 38 has a maximum cross-section of less than 30 mm², preferably less than 25 mm², more preferably less than 20 mm², and even more preferably less than 15 mm².

[0046] As can be seen in [Fig. 1] and [Fig. 3], the expanded metal insert 3 has several non-central openings 32 in its central portion. The non-central openings 32 are distributed in an annular area 34 of the expanded metal insert 3. The non-central openings 32 are regularly distributed around a central area 35 of the expanded metal insert 3. The non-central openings 32 are more elongated in the radial direction than in the transverse direction.

[0047] In the embodiment illustrated in the figures, there are 12 non-central openings. The length of the non-central openings 32 is, for example, the order of 10.5 mm whereas the width of the non-central openings 32 is for example the order of 6 mm.

[0048] The non-central openings 32 have an opening cross-section at least equal to twice the inter-strand opening diameter OB, preferably at least equal to three times the inter-strand opening diameter OB, preferably again at least equal to four times the inter-strand opening diameter OB, preferably at least equal to five times the inter-strand opening diameter OB. The opening cross-section of the central opening 38 is at least equal to twice the inter-strand opening diameter OB, preferably at least equal to three times the inter-strand opening diameter OB, preferably again at least equal to four times the inter-strand opening diameter OB, preferably at least equal to five times the inter-strand opening diameter OB.

[0049] As can be seen in [Fig.1], the non-central openings 32 extend entirely into the depressed area 33. If desired, at least a part of at least one non-central opening 32 may extend into the depressed area 33.

[0050] The expanded metal insert 3 is inserted at least partially into the metal substrate 2, on the heating face side 12, in order to make the metal cooking support 10 compatible with induction heating.

[0051] Figure 4 schematically illustrates the expanded metal insert 3 inserted into the metal substrate 2. As more clearly seen in Figure 4, the metal substrate 2 has a substrate thickness ES. The substrate thickness ES is advantageously less than or equal to 3.4 mm, preferably less than or equal to 3 mm, and more preferably less than or equal to 2.5 mm. Preferably, the substrate thickness ES is greater than or equal to 2 mm, and more preferably greater than or equal to 2.2 mm.

[0052] As more clearly seen in [Fig.4], a side wall 16 (partially shown) rises around the bottom 13 to form a cooking vessel 20.

[0053] As shown in [Fig. 4], the expanded metal insert 3 extends only in the bottom area 13 without reaching the side wall 16. More specifically, the expanded metal insert 3 extends throughout the bottom area 13. It should be noted that the representation in [Fig. 4] is schematic and that the expanded metal insert 3 does not completely cover the bottom 13. In other words, the metal substrate 2 is visible through the interstrand openings 31 of the expanded metal insert 3. Alternatively, the expanded metal insert 3 does not necessarily extend over the entire bottom 13. As a further alternative, the expanded metal insert 3 could extend over at least part of the side wall 16.

[0054] The metal cooking support 10 illustrated in [Fig.4] can be obtained by the following process.

[0055] The expanded metal insert 3 is placed on the metal substrate 2. A pre-crimping of the expanded metal insert 3 is carried out at at least one of the openings non-central openings 32 are pre-crimped by performing at least one localized impact operation on the free edge of the expanded metal insert 3. This locally deforms said free edge of the expanded metal insert 3 and inserts it into the metal substrate 2. The high deformability of the expanded metal insert 3 facilitates such an operation. Preferably, the pre-crimping of the expanded metal insert 3 is performed at several non-central openings 32 by performing a localized impact operation on the free edge of the expanded metal insert 3 at said non-central openings 32. Advantageously, the non-central openings 32, having undergone deformation to perform the pre-crimping, surround the central area 35. Thus, during the pre-crimping operation, only a portion of the expanded metal insert 3 is inserted into the metal substrate 2. Moreover, this insertion can be partial.In other words, in the deformed area of ​​the expanded metal insert 3, the expanded metal insert 3 is not necessarily completely inserted into the metal substrate 2.

[0056] The expanded metal insert 3, pre-crimped onto the metal substrate 2, can then be more permanently assembled by a stamping operation. Unlike the pre-crimping operation, the stamping operation covers the entire surface of the expanded metal insert 3. A shape can be provided on the stamping punch at the non-central openings 32 so as to create the depressed area 33 during the stamping operation. Pre-crimping the expanded metal insert 3 onto the metal substrate 2 ensures the correct positioning of the expanded metal insert 3 on the metal substrate 2 before and during the stamping operation. The stamping operation results in a permanent assembly of the expanded metal insert 3 within the surface of the metal substrate 2.

[0057] As an alternative or in addition, a pre-crimping of the expanded metal insert 3 can be carried out at the central opening 38 by performing at least one localized striking operation on the free edge of the expanded metal insert 3, which locally deforms said free edge of the expanded metal insert 3 and inserts it into the metal substrate 2.

[0058] Figure 5 illustrates an alternative embodiment in which the metal cooking support 10 has a non-stick coating 1 and a protective coating 5. The non-stick coating 1 forms a cooking surface 14 of the cooking face 11. The protective coating 5 forms a heating surface 15 of the heating face 12. The metal substrate 2 has the non-stick coating 1 on the side of the cooking face 11. The metal substrate 2 and the expanded metal insert 3 have the protective coating 5 on the side of the heating face 12. The expanded metal insert 3 is inserted into the metal substrate 2 on the side of the heating face 12. Due to the inter-strand openings 31 between the strands 30 of the expanded metal insert 3, the expanded metal insert 3 does not completely cover the metal substrate 2 in the bottom area 13.

[0059] The non-stick coating 1 is, for example, a PTFE (Polytetrafluoroethylene; in other words, a PTFE-type fluorinated resin-based coating), a ceramic-type coating, or a sol-gel-type coating (in other words, a sol-gel-synthesized coating). The non-stick coating 1 may be single-layer or multi-layer. The non-stick coating 1 may also be silicone resin-based or silicone-polyester resin-based coating(s).

[0060] The protective coating 5 is, for example, a PTFE-type coating (in other words, a PTFE-type fluorinated resin-based coating), or an enamel-type coating, or a lacquer-type coating, or a ceramic-type coating, or a sol-gel-type coating (in other words, a coating synthesized by the sol-gel process). The protective coating 5 may be single-layer or multi-layer. The protective coating 5 may also be one or more coatings based on silicone resin or silicone-polyester resin.

[0061] Table 1 summarizes the characteristics of samples #1 to #4 of expanded metal insert 3 which were inserted into metallic substrates 2 of diameter 28 cm and thickness 2.4 mm of aluminium alloy to obtain cooking supports 10 Ref. 1 to Ref.4.

[0062] [Tables 1] EB (mm) LB (mm) OB (mm) TF (%) #1 0.6 0.6 3.10 55 #2 0.6 0.6 2.25 46 #3 0.6 0.8 1.75 39 #4 0.6 1 1.00 26

[0063] Table 2 shows the different induction heating plates used and the results of the tests carried out with the cooking supports 10 Ref.1 to Ref.4.

[0064] [Tables2] MIELE® BRANDT® BSH® BSH® Ref KM6114 BPI6320X PIJ631FB1E PIJ631FB1E 0 Inductor (mm) 270 270 210 210 Position P9 PBoost P9 PBoost Rated Power (W) 1800 2200 2200 3700 Power Ref.1 (W) 520-548 1560-1570 1680-1737 2200-2700(*) Power Ref.2 (W) 870-885 1750-1750 1776-1865 3070-3070 Power Ref.3 (W) 845-1125 1730-1860 1860-1990 3065-3065 Power Ref.4 (W) 1500-1590 2000-2020 2070-2100 3300-3300

[0065] (*) unstable operation oscillating between 2200 and 2700 W.

[0066] The 4 cooking supports 10 Ref.1 to Ref.4 tested are lighter than conventional cooking supports with a ferromagnetic material insert in the form of a perforated plate, due to the smaller quantity of material used to make the expanded metal insert 3, as well as the reduced thickness of the metal substrate 2.

[0067] The four tested baking supports 10 Ref. 1 to Ref. 4 exhibit satisfactory resistance to deformation, although the thickness of the metallic substrate 2 is thinner than that usually used with perforated plate ferromagnetic inserts, due to the lower mechanical strength of the expanded metal insert 3 compared to a perforated plate. This results in less sensitivity of the baking supports 10 to deformations due to the differential expansion of the materials of the metallic substrate 2 and the expanded metal insert 3. Furthermore, the expanded metal insert 3 requires less insertion force into the metallic substrate 2 than the force required to insert a perforated plate into said metallic substrate 2, which also facilitates a reduction in the thickness of the metallic substrate 2.

[0068] Figures 6 and 7 illustrate a metal cooking support 100 having a heating surface 110. The metal cooking support 100 can, in particular, be formed by the metal cooking support 10 illustrated in Figures 1 and 4 or by the metal cooking support 10 illustrated in [Fig. 5]. The metal cooking support 100 has a side wall 123 rising around a base 122 of the heating surface 110 to form a cooking vessel 124. Alternatively, the metal cooking support 100 does not necessarily form a cooking vessel 124. The metal cooking support 100 can, in particular, form a cooking plate.

[0069] Figure 6 illustrates a cooking article 140 comprising a cooking support A metal plate 100 forming the cooking vessel 124 and a gripping member 150 mounted on the cooking vessel 124. In the embodiment illustrated in [Fig. 6], the gripping member 150 is attached to the cooking vessel 124 by at least one rivet 151. For this purpose, the rivet 151 is mounted in a hole provided in a side wall 123 of the cooking vessel. If desired, several rivets 151 can be used to attach the gripping member 150 to the cooking vessel 124. Preferably, between two and four rivets 151 are used to attach the gripping member 150 to the cooking vessel 124. Alternatively, the gripping member 150 could be attached to the side wall 123 by welding or by screwing onto a stud welded to the side wall 123.If desired, another gripping member can be fixed to the side wall 123 of the cooking container 124 by means of at least one other rivet, by welding or by screwing onto a stud welded to the side wall 123.

[0070] Figure 7 illustrates an electric cooking appliance 160 comprising a support for A metal cooking surface 100 is associated with an induction heating element 170. The metal cooking surface 100, forming the cooking vessel 124, is arranged in a heating base 175 comprising the induction heating element 170. The base 122 rests on the induction heating element 170. If desired, the cooking vessel 124 may include at least one gripping element 155. In the embodiment illustrated in [Fig. 7], the cooking vessel 124 has two opposing gripping elements 155. The gripping member(s) 155 is attached to the cooking vessel 124 by at least one rivet 156. For this purpose, the rivet 156 is mounted in a hole provided in the side wall 123. If desired, several rivets 156 may be used to attach the gripping member(s) 155 to the cooking vessel 124. Preferably, between two and four rivets 156 are used to attach the gripping member(s) 155 to the cooking vessel 124.Alternatively, one or more of the gripping members 155 could be fixed to the side wall 123 by welding or by screwing onto a stud welded to the side wall 123.

[0071] As an alternative, the metal cooking support 10 does not necessarily include a non-stick coating 1 forming a cooking surface 14 of the cooking face 11, and a protective coating 5 forming a heating surface 15 of the heating face 12.

[0072] As an alternative, the expanded metal insert 3 does not necessarily have a central opening 38.

[0073] By way of alternative, the expanded metal insert 3 does not necessarily have several non-central openings 32 in its central portion. In particular, the expanded metal insert 3 may have in its central portion at least one non-central opening 32 having an opening cross-section at least equal to twice the diameter inter-strand opening OB, preferably at least equal to three times the inter-strand opening diameter OB, preferably still at least equal to four times the inter-strand opening diameter OB, preferably at least equal to five times the inter-strand opening diameter OB. The expanded metal insert 3 may also be without non-central openings.

[0074] Various modifications and / or improvements obvious to a person skilled in the art may be made to the examples of embodiment of the invention described in this description without departing from the scope of the invention as defined by the attached claims.

Claims

Claims

1. A metal cooking support (10) compatible with induction heating, having a cooking face (11) and a heating face (12), comprising a metal substrate (2) made of aluminum or aluminum alloy, and an expanded metal insert (3) made of ferromagnetic material, said expanded metal insert (3) being inserted at least partially into the metal substrate (2) on the side of the heating face (12), the expanded metal insert (3) having an inter-strand opening diameter (OB), characterized in that the expanded metal insert (3) has in its central portion a central opening (38) and / or at least one non-central opening (32), having an opening section at least equal to twice the inter-strand opening diameter (OB), preferably at least equal to three times the inter-strand opening diameter (OB), more preferably at least equal to four times the inter-strand opening diameter (OB),preferably at least equal to five times the inter-strand opening diameter (OB).,

2. Metal cooking support (10) according to claim 1, characterized in that the heating face (12) has a depressed zone (33) in which at least a part of said at least one non-central opening (32) extends.

3. A metal cooking support (10) according to claim 2, characterized in that said at least one non-central opening (32) extends entirely into the depressed area (33).

4. Metal cooking support (10) according to one of claims 2 or 3, characterized in that the depressed zone (33) is annular.

5. Metal cooking support (10) according to one of claims 2 to 4, characterized in that the depth of the depressed zone (33) is between 0.1 and 0.5 mm, preferably between 0.2 and 0.4 mm.

6. Metal cooking support (10) according to one of claims 1 to 5, characterized in that the expanded metal insert (3) has in its central portion several non-central openings (32), preferably at least 3 non-central openings (32), having an opening section at least equal to twice the inter-strand opening diameter (OB), preferably at least equal to three times the inter-strand opening diameter (OB), more preferably at least equal to four times the inter-strand opening diameter (OB), more preferably at least equal to five times the inter-strand opening diameter (OB).

7. A metal cooking support (10) according to claim 6, characterized in that the non-central openings (32) are more elongated in the radial direction than in the transverse direction.

8. Metal cooking support (10) according to one of claims 6 or 7, characterized in that it comprises at least 6 non-central openings (32), and preferably 12 non-central openings (32).

9. Metal cooking support (10) according to one of claims 6 to 8, characterized in that the non-central openings (32) are distributed in an annular zone (34) of the expanded metal insert (3).

10. Metal cooking support (10) according to one of claims 6 to 9, characterized in that the non-central openings (32) are distributed regularly around a central zone (35) of the expanded metal insert (3).

11. Metal cooking support (10) according to one of claims 1 to 10, characterized in that the expanded metal insert (3) has a central opening (38) having an opening section at least equal to twice the inter-strand opening diameter (OB), preferably at least equal to three times the inter-strand opening diameter (OB), more preferably at least equal to four times the inter-strand opening diameter (OB), more preferably at least equal to five times the inter-strand opening diameter (OB).

12. Metal cooking support (10) according to one of claims 1 to 11, characterized in that the metal substrate (2) has a substrate thickness (ES) less than or equal to 3.4 mm, preferably less than or equal to 3 mm, more preferably less than or equal to 2.5 mm.

13. Metal cooking support (10) according to one of claims 1 to 12, characterized in that the expanded metal insert (3) is made of ferritic stainless steel, preferably type 430 stainless steel.

14. Metal cooking support (10) according to one of claims 1 to 13, characterized in that it has a base (13) configured to rest on an induction heating device.

15. Metal cooking support (10) according to claim 14, characterized in that the bottom (13) is flat.

16. A metal cooking support (10) according to one of claims 14 or 15, characterized in that a side wall (16) rises around the bottom (13) to form a cooking container (20).

17. Metal cooking support (10) according to one of claims 1 to 16, characterized in that the metal substrate (2) carries a non-stick coating (1) forming a cooking surface (14) of the cooking face (11).

18. Metal cooking support (10) according to one of claims 1 to 17, characterized in that the metal substrate (2) and the expanded metal insert (3) carry a protective coating (5) forming a heating surface (15) of the heating face (12).

19. Culinary article (140) comprising a metal cooking support (100) and a gripping member (150) mounted on the metal cooking support (100), characterized in that the metal cooking support (100) conforms to one of claims 1 to 18.

20. Electrical cooking appliance (160) comprising a metal cooking support (100) associated with an induction heating zone (170), characterized in that the metal cooking support (100) conforms to one of claims 1 to 18.

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