Inductively heatable coated metal cooking rack
By using a combined structure of ferrite-rich layer and thin conductive layer in the cooking bracket, the problem of high cost of induction heating-compatible cooking brackets in the prior art is solved, and the compatibility and cost-effectiveness with the induction heating device are improved.
Patent Information
- Application Number
- CN202380040482.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2022-05-30
- Filing Date
- 2023-05-26
- Publication Date
- 2024-12-27
AI Technical Summary
The existing induction heating-compatible cooking brackets are costly to achieve, especially the Curie point layer is expensive to deposit by arc spraying.
Using a combined structure of ferrite-rich layer and thin conductive layer, the ferrite-rich layer has high magnetic permeability and resistivity. The thin conductive layer is used to guide the magnetic field and heat it through the Joule effect to ensure compatibility with the induction heating device and Arranged between the protective coating and the metal substrate to avoid magnetic leakage.
Compatibility with induction heating devices is achieved while reducing costs, suitable for induction heating devices of different sizes, and maintaining performance under high temperature conditions.
Smart Images
Figure CN119212598A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of metal cooking racks compatible with induction heating for cooking or reheating food. Such metal cooking racks can be used with an induction heating device, such as an induction plate mounted or integrated on a work surface, or an induction heating stove integrated in an electric cooking appliance.
[0002] The present invention more particularly relates to coated metal cooking supports that are compatible with induction heating.
[0003] The invention relates particularly, but not exclusively, to coated metal cooking racks forming cooking vessels.
[0004] The present invention also relates to a cooking utensil comprising a coated metal cooking support associated with at least one gripping member. If desired, the one or more gripping members may be removable or detachable relative to the coated metal cooking support.
[0005] The invention also relates to an electric cooking appliance comprising a coated metal cooking support associated with an induction heating device. Background Art
[0006] From the document JP H10125453 it is known that Figure 3 The embodiment of the invention manufactures a multilayer cooking utensil comprising an aluminum alloy cover, a Curie point layer arranged on the outside of the bottom of the cover and a conductive protective layer on the outer heating surface, wherein a fluorinated coating is arranged on the inner cooking surface. Such an embodiment allows the manufacture of a cooking utensil that can be heated by induction.
[0007] However, the Curie point layer is a stainless steel layer deposited by arc spraying. This implementation appears to be relatively expensive. Summary of the invention
[0008] Various aspects of the present invention aim to remedy the shortcomings of the prior art by proposing a coated metal cooking rack that is compatible with induction heating and has a limited cost price.
[0009] A first aspect of the invention relates to a coated metal cooking support compatible with induction heating, having a cooking surface and a heating surface, the heating surface having a bottom configured to rest on an induction heating device, the coated metal cooking support comprising a metal substrate with a protective coating forming a heating surface of the heating surface, the metal substrate with a non-stick coating forming a cooking surface of the cooking surface, or the metal substrate forming a cooking surface of the cooking surface, wherein a ferrite-rich layer is arranged between the metal substrate and the protective coating at least in a portion of the bottom, the ferrite-rich layer having a Curie temperature, a high magnetic permeability up to the Curie temperature, and a very high resistivity, and a thin conductive layer is arranged between the ferrite-rich layer and the protective coating. The ferrite-rich layer, due to its high magnetic permeability up to the Curie temperature, allows guiding the magnetic field and preventing magnetic leakage to the metal substrate, which would limit the induction compatibility of the coated metal cooking support. The magnetic field is thus concentrated in the thin conductive layer. This layer is conductive and has a small thickness, and the generation of eddy currents allows it to be heated by the Joule effect. In this way, the ferrite-rich layer allows the coated metal cooking support to be compatible with induction heating devices.
[0010] The thin conductive layer may cover the ferrite-rich layer, but does not necessarily cover the edges of the ferrite-rich layer.
[0011] The ferrite-rich layer can extend over the entire bottom, thereby allowing to prevent any magnetic leakage, in particular on induction heating devices having a smaller diameter than the coated metal cooking support. This arrangement allows to improve the operation on induction heating devices of different sizes.
[0012] The thin conductive layer can extend over the entire bottom. This arrangement allows heating to be performed over the entire bottom of the cooking device, the heating being generated in the thin conductive layer.
[0013] The thickness of the metal substrate may be between 2 mm and 6 mm when provided with a non-stick coating, or between 0.4 and 3 mm when not provided with a non-stick coating.
[0014] The relative magnetic permeability of the ferrite-rich layer may be between 10 and 1000, preferably between 100 and 1000.
[0015] The resistivity of the ferrite-rich layer may be between 0.1 and 1000 Ohm.m, preferably between 1 and 100 Ohm.m.
[0016] The Curie temperature of the ferrite rich layer may be between 180°C and 250°C.
[0017] The ferrite-rich layer may be formed from a ferrite filler disposed in an organic or inorganic matrix. The ferrite filler may also be deposited by thermal spraying.
[0018] The thickness of the thin conductive layer may be between 5 and 100 μm, preferably between 5 and 25 μm.
[0019] The resistivity of the thin conductive layer may be between 1 and 100 μOhm.cm, preferably between 1 and 10 μOhm.cm.
[0020] The thin conductive layer may in particular be made of an aluminum alloy, a copper alloy or a silver alloy.
[0021] The protective coating can be in particular a PTFE type coating, or an enamel type coating, or a lacquer type coating, or a ceramic type coating, or a sol-gel type coating, or a silicone resin-based coating, or a silicone-polyester resin-based coating. The protective coating can be a single layer or a multilayer. If necessary, other protective coatings can be considered.
[0022] The non-stick coating can be a PTFE type coating, or a ceramic type coating, or a sol-gel type coating, or a silicone resin-based coating, or a silicone-polyester resin-based coating. The non-stick coating can be a single layer or a multilayer. If necessary, other non-stick coatings compatible with food contact can be considered.
[0023] The side walls may rise around the bottom of the heating surface to form a cooking vessel.
[0024] The ferrite-rich layer and the thin conductive layer may extend over the entire side wall, allowing to prevent any magnetic leakage, in particular on induction heating devices having a diameter larger than the cooking rack.
[0025] At least a portion of the side wall may be free of the ferrite rich layer and the thin conductive layer, particularly an upper portion of the side wall.
[0026] In this way, the ferrite rich layer and the thin conductive layer may extend at least over a lower portion of the side walls.
[0027] The entire sidewall may be free of the ferrite-rich layer and the thin conductive layer. This arrangement allows for easy deposition of the ferrite-rich layer and the thin conductive layer.
[0028] A second aspect of the present invention relates to a cooking utensil comprising a coated metal cooking rack and a gripping member mounted on the coated metal cooking rack, wherein the coated metal cooking rack complies with at least one of the aforementioned features.
[0029] A third aspect of the invention relates to an electric cooking appliance comprising a coated metal cooking rack associated with an induction heating oven, wherein the coated metal cooking rack complies with at least one of the aforementioned features. BRIEF DESCRIPTION OF THE DRAWINGS
[0030] Other characteristics and properties of the invention will become more apparent on reading the following detailed description of embodiments and variants, which are in no way limiting, illustrated in the accompanying drawings, in which:
[0031] Figure 1shows a schematic front cross-sectional view of a first embodiment of a coated metal cooking support according to the present invention,
[0032] Figure 2 shows a schematic front cross-sectional view of a second embodiment of a coated metal cooking support according to the present invention,
[0033] Figure 3 shows a schematic front cross-sectional view of a third embodiment of a coated metal cooking support according to the present invention,
[0034] Figure 4 shows a schematic front cross-sectional view of a fourth embodiment of a coated metal cooking support according to the present invention,
[0035] Figure 5 shows a schematic front cross-sectional view of a fifth embodiment of a coated metal cooking support according to the present invention,
[0036] Figure 6 shows a schematic front cross-sectional view of an embodiment of a cooking utensil comprising a coated metal cooking support according to the present invention,
[0037] Figure 7 A schematic front cross-sectional view of an embodiment of an electric cooking appliance comprising a coated metal cooking support according to the present invention is shown. DETAILED DESCRIPTION
[0038] Figure 1 and Figure 2 Two embodiments of coated metal cooking supports 10, 10' compatible with induction heating are shown. The coated metal cooking supports 10, 10' compatible with induction heating have a cooking surface 11, 11' and a heating surface 12, 12'. The heating surface 12, 12' has a bottom 13, 13' configured to rest on an induction heating device.
[0039] The coated metal cooking support 10, 10' comprises a metal substrate 2, 2' with a non-stick coating 1, 1', which forms a cooking surface 14, 14' of a cooking surface 11, 11'. The non-stick coating 1, 1' is, for example, a PTFE-type coating (in other words, a PTFE-type fluororesin-based coating), or a ceramic-type coating, or a sol-gel-type coating (in other words, a coating synthesized by a sol-gel route). The non-stick coating 1, 1" can be single-layer or multi-layer.
[0040] The metal substrate 2 , 2 ′ is advantageously made of aluminum.
[0041] Preferably, the thickness of the metal substrate 2, 2' is between 2 mm and 6 mm.
[0042] Figure 3 , Figure 4 and Figure 5 Three further embodiments of coated metal cooking racks 10", 10"', 10"" compatible with induction heating are shown. The coated metal cooking racks 10", 10"', 10"" compatible with induction heating have a cooking surface 11", 11"', 11"" and a heating surface 12", 12"', 12"". The heating surface 12", 12"', 12"" has a bottom 13", 13"', 13"", which is configured to rest on an induction heating device.
[0043] The coated metal cooking support 10", 10"', 10"" differs from the coated metal cooking support 10, 10' in that it comprises a metal substrate 2", 2"', 2"" which forms a cooking surface 14", 14"', 14"" of the cooking surface 11", 11"', 11"". In this way, the metal substrate 2", 2"', 2"" has no non-stick coating. The metal substrate 2", 2"', 2"" advantageously comprises a stainless steel layer forming the cooking surface 14", 14"', 14"" made of stainless steel. The metal substrate 2", 2"' is advantageously made of a multilayer material including a stainless steel layer forming the cooking surface 14", 14"', in particular of a double layer stainless steel / aluminum material. The metal substrate 2", 2"' may in particular comprise an aluminum layer. Alternatively, the metal substrate 2", 2"' may be formed by a stainless steel layer. Preferably, the thickness of the metal substrate 2", 2"' is between 0.4 mm and 3 mm. The metal substrate 2"" is advantageously formed by a stainless steel layer forming the cooking surface 14"" and beneath which is fitted a heat diffusion layer 17 extending only in the bottom area 13"" and advantageously made of aluminum. Alternatively, the metal substrate 2"" may be made of a multilayer material, including a stainless steel layer forming the cooking surface 14"", in particular of a three-layer stainless steel / aluminum / stainless steel material. Preferably, the thickness of the metal substrate 2"" is between 0.4 mm and 3 mm. Preferably, the thickness of the heat diffusion layer 17 is between 2 mm and 10 mm.
[0044] The ferrite-rich layer 3, 3', 3", 3'", 3"" is arranged between the metal substrate 2, 2', 2", 2'", 2"" and the protective coating 5, 5', 5", 5'", 5"". Figure 1 , Figure 2 , Figure 3 and Figure 4 In the embodiment shown, the ferrite-rich layer 3, 3', 3", 3'" is disposed on the metal substrate 2, 2', 2", 2'". Figure 5In the illustrated embodiment, the ferrite-rich layer 3"" is disposed on the heat diffusion layer 17. The ferrite-rich layer 3, 3', 3", 3"', 3"" has a Curie temperature, a high magnetic permeability up to the Curie temperature, and a very high resistivity. Preferably, the Curie temperature of the ferrite-rich layer 3, 3', 3", 3"', 3"" is between 180°C and 250°C. The relative magnetic permeability of the ferrite-rich layer 3, 3', 3", 3"', 3"" is between 10 and 1000, preferably between 100 and 1000. The resistivity of the ferrite-rich layer 3, 3', 3", 3"', 3"" is between 0.1 and 1000 Ohm.m, preferably between 1 and 100 Ohm.m. The ferrite-rich layer 3, 3', 3", 3"', 3"" can in particular be formed by a ferrite filler disposed in an organic or inorganic matrix.
[0045] exist Figure 1 and Figure 2 In the embodiment shown, and in Figure 3 , Figure 4 and Figure 5 In the illustrated embodiment, the ferrite rich layer 3, 3', 3", 3"', 3"" extends over the entire bottom 13, 13', 13", 13"', 13"". Alternatively, the ferrite rich layer 3, 3', 3", 3"', 3"" may be arranged between the metal substrate 2, 2', 2", 2"', 2"" and the protective coating 5, 5', 5", 5"', 5"" at least in a portion of the bottom 13, 13', 13", 13"', 13"".
[0046] The thin conductive layer 4, 4', 4", 4"', 4"" is arranged between the ferrite-rich layer 3, 3', 3", 3"', 3"" and the protective coating 5, 5', 5", 5"', 5"". The thickness of the thin conductive layer 4, 4', 4", 4"', 4"" is between 5 and 100 μm, preferably between 5 and 25 μm. The relative magnetic permeability of the thin conductive layer 4, 4', 4", 4"', 4"" is 1. The resistivity of the thin conductive layer 4, 4', 4", 4"', 4"" is between 1 and 100 μOhm.cm, preferably between 1 and 10 μOhm.cm. The thin conductive layer 4, 4', 4", 4"', 4"" can in particular be made of an aluminum alloy, a copper alloy or a silver alloy.
[0047] The metal substrate 2, 2', 2", 2"', 2"" carries a protective coating 5, 5', 5", 5"', 5"", which forms the heating surface 15, 15', 15", 15"', 15"" of the heating surface 12, 12', 12", 12"', 12"". The protective coating 5, 5', 5", 5"', 5"" is, for example, a PTFE-type coating (polytetrafluoroethylene; in other words, a PTFE-type fluororesin-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 a sol-gel approach). The protective coating 5, 5', 5", 5"', 5"" can be single-layer or multi-layer.
[0048] The protective coating 5, 5', 5", 5"', 5"" and / or the non-stick coating 1, 1' may also be (one or more) silicone-based or silicone-polyester resin-based coatings. Silicone-polyester resins are widely used in the molding industry for their non-stick properties, simultaneous substrate adhesion and compatibility with stamping processes. However, they degrade at temperatures above 230°C. The use of a ferrite-rich layer 3, 3', 3", 3"', 3"" allows limiting the temperature of the coated metal cooking rack 10, 10', 10", 10"', 10"" when it is heated by induction, and contemplates the use of silicone-polyester resins for the protective coating 5, 5', 5", 5"', 5"" and / or the non-stick coating 1, 1'.
[0049] exist Figure 1 and Figure 2 In the embodiment shown, and in Figure 3 , Figure 4 and Figure 5 In the embodiment shown, the thin conductive layer 4, 4', 4", 4'", 4"" extends over the entire bottom 13, 13', 13", 13'", 13"".
[0050] Alternatively, the thin conductive layer 4, 4', 4", 4'", 4"" may extend at least in the one or more portions of the bottom 13, 13', 13", 13"', 13"" having the ferrite rich layer 3, 3', 3", 3"', 3"". Therefore, in other words, the thin conductive layer 4, 4', 4", 4'", 4"" covers the ferrite rich layer 3, 3', 3", 3"', 3"".
[0051] exist Figure 2 In the embodiment shown, and in Figure 4 and Figure 5In the embodiment shown, the ferrite-rich layer 3', 3'", 3"" only extends on the bottom 13', 13'", 13"", and the thin conductive layer 4', 4'", 4"" only extends on the bottom 13', 13'", 13"". The thin conductive layer 4', 4'", 4"" covers the ferrite-rich layer 3', 3'", 3"", but does not necessarily cover the edges of the ferrite-rich layer 3', 3'", 3"", in particular as Figure 5 As shown, the ferrite-rich layer 3"" is disposed below the heat diffusion layer 17. Note that Figure 1 and Figure 2 as well as Figure 3 , Figure 4 and Figure 5 In the figures, the thicknesses of the thin conductive layers 4, 4', 4", 4'", 4"', 4"" and the ferrite-rich layers 3, 3', 3", 3"', 3"" are not necessarily shown to scale relative to the metal substrate 2, 2', 2", 2"', 2"" and / or relative to the non-stick coating 1, 1' and / or relative to the protective coating 5, 5', 5", 5"', 5"" or even relative to the heat diffusion layer 17.
[0052] exist Figure 1 and Figure 2 In the embodiment shown, and in Figure 3 , Figure 4 and Figure 5 In the illustrated embodiment, the side walls 16, 16', 16", 16"', 16"" are raised around the bottom 13, 13', 13", 13"', 13"" of the heating surface 12, 12', 12", 12"', 12"" to form the cooking container 20, 20', 20", 20"', 20"". Alternatively, the coated metal cooking rack 10, 10', 10", 10"', 10"" does not necessarily include side walls raised around the bottom 13, 13', 13", 13"', 13"".
[0053] exist Figure 1 The embodiments shown and Figure 3 In the embodiment shown, the ferrite-rich layer 3, 3" and the thin conductive layer 4, 4" extend over the entire side wall 16, 16".
[0054] exist Figure 2 In the embodiment shown, and in Figure 4 and Figure 5 In the illustrated embodiment, the entire sidewall 16 ′, 16 ′″, 16 ″″ is free of the ferrite-rich layer and the thin conductive layer.
[0055] Alternatively, at least a portion of the sidewall may be free of the ferrite-rich layer and the thin conductive layer. Preferably, then, the thin conductive layer covers the ferrite-rich layer, but not necessarily the edge of the ferrite-rich layer.
[0056] Figure 6 and Figure 7 A coated metal cooking rack 100 is shown having a heating surface 110. The coated metal cooking rack 100 comprises a side wall 123 raised around a bottom 122 of the heating surface 110 to form a cooking container 124. Alternatively, the coated metal cooking rack 100 does not necessarily form a cooking container 124. The coated metal cooking rack 100 may in particular form a cooking plate.
[0057] Figure 6 A cooking appliance 140 is shown which includes a coated metal cooking rack 100 forming a cooking container 124. The coated metal cooking rack 100 may be made of Figure 1 The coated metal cooking rack 10 shown is formed of or made of Figure 2 The coated metal cooking rack 10' shown is formed of or made of Figure 3 , Figure 4 and Figure 5 The cooking rack 10", 10"', 10"" is formed by one of the cooking racks 10", 10"', 10"". The gripping member 150 is mounted on the cooking container 124. Figure 6 In the illustrated embodiment, the gripping member 150 is fastened to the cooking container 124 by at least one rivet 151. To this end, the rivet 151 is installed in a hole arranged in the side wall 123 of the cooking container. If desired, a plurality of rivets 151 may be used to fasten the gripping member 150 to the cooking container 124. Preferably, two to four rivets 151 are used to fasten the gripping member 150 to the cooking container 124. Alternatively, the gripping member 150 may be fastened to the side wall 123 by welding or screwing to a stud welded to the side wall 123. If desired, another gripping member may be fastened to the side wall 123 of the cooking container 124 by at least one additional rivet, by welding or by screwing to a stud welded to the side wall 123.
[0058] Figure 7 An electric cooking appliance 160 is shown, which includes a coated metal cooking rack 100 associated with an induction heating oven 170. The coated metal cooking rack 100 forms a cooking container 124. The coated metal cooking rack 100 may be made of Figure 1 The coated metal cooking rack 10 shown is formed of or made of Figure 2 The coated metal cooking rack 10' shown is formed of or made of Figure 3 , Figure 4 and Figure 5 The cooking container 124 is formed by one of the coated metal cooking racks 10", 10"', 10"". The cooking container 124 is arranged in a heating base 175 including an induction heating oven 170. The bottom 122 rests on the induction heating oven 170. If desired, the cooking container 124 may include at least one gripping member 155. Figure 4In the illustrated embodiment, the cooking container 124 comprises two opposing gripping members 155. The gripping member or each gripping member 155 is fastened to the cooking container 124 by at least one rivet 156. To this end, the rivet 156 is mounted in a hole arranged in the side wall 123. If desired, a plurality of rivets 156 may be used to fasten the gripping member or each gripping member 155 to the cooking container 124. Preferably, two to four rivets 156 are used to fasten the gripping member or each gripping member 155 to the cooking container 124. Alternatively, the gripping member or at least one gripping member 155 may be fastened to the side wall 123 by welding or screwing to a stud welded to the side wall 123.
[0059] Various modifications and / or improvements that will be apparent to a person skilled in the art may be made to the embodiments of the invention described in this specification without departing from the scope of the invention as defined by the appended claims.
Claims
1. A coated metal cooking rack (10, 10', 10", 10"', 10"") compatible with induction heating, having a cooking surface (11, 11', 11", 11"', 11"") and a heating surface (12, 12', 12", 12"', 12""), the heating surface having a bottom (13, 13', 13", 13"', 13"") configured to rest on an induction heating device, the coated metal cooking rack (10, 10', 10", 10"', 10"") comprising a metal substrate (2, 2', 2", 2"', 2""), the metal substrate The metal base (2, 2') has a protective coating (5, 5', 5", 5"', 5""), the protective coating forming the heating surface (15, 15', 15", 15"', 15"") of the heating surface (12, 12', 12", 12"', 12""), the metal base (2, 2') has a non-stick coating (1, 1'), the non-stick coating forming the cooking surface (14, 14') of the cooking surface (11, 11'), or the metal base forms the cooking surface (14", 14"', 14"") of the cooking surface (11", 11"', 11""), characterized in that: In at least a portion of the bottom (13, 13', 13", 13"', 13""), a ferrite-rich layer (3, 3', 3", 3"', 3"") is arranged between the metal substrate (2, 2', 2", 2"', 2"") and the protective coating (5, 5', 5", 5"', 5""), the ferrite-rich layer (3, 3', 3", 3"', 3"") having a Curie temperature, a high magnetic permeability up to the Curie temperature and a very high resistivity, and a thin conductive layer (4, 4', 4", 4"', 4"") is arranged between the ferrite-rich layer (3, 3', 3", 3"', 3"") and the protective coating (5, 5', 5", 5"', 5"") 2. The coated metal cooking rack (10, 10', 10", 10'", 10"") according to claim 1, characterized in that The thin conductive layer (4, 4', 4", 4'", 4"") covers the ferrite rich layer (3, 3', 3", 3'", 3"").
3. The coated metal cooking support (10, 10', 10", 10'", 10"") according to any one of claims 1 or 2, characterized in that The ferrite-rich layer (3, 3', 3", 3'", 3"") extends over the entire bottom (13, 13', 13", 13'", 13"").
4. The coated metal cooking support (10, 10', 10", 10'", 10"") according to any one of claims 1 or 3, characterized in that The thin conductive layer (4, 4', 4", 4'", 4"") extends over the entire bottom (13, 13', 13", 13'", 13"").
5. The coated metal cooking support (10, 10', 10", 10'", 10"") according to any one of claims 1 to 4, characterized in that When provided with the non-stick coating (1, 1'), the thickness of the metal substrate (2, 2') is between 2 mm and 6 mm, or when not provided with the non-stick coating, the thickness of the metal substrate (2, 2') is between 0.4 and 3 mm.
6. The coated metal cooking support (10, 10', 10", 10'", 10"") according to any one of claims 1 to 5, characterized in that The relative magnetic permeability of the ferrite-rich layer (3, 3', 3", 3'", 3"") is between 10 and 1000, preferably between 100 and 1000.
7. The coated metal cooking support (10, 10', 10", 10'", 10"") according to any one of claims 1 to 6, characterized in that The resistivity of the ferrite-rich layer (3, 3', 3", 3'", 3"") is between 0.1 and 1000 Ohm.m, preferably between 1 and 100 Ohm.m.
8. The coated metal cooking support (10, 10', 10", 10'", 10"") according to any one of claims 1 to 7, characterized in that The Curie temperature of the ferrite-rich layers (3, 3', 3", 3'", 3"") is between 180°C and 250°C.
9. The coated metal cooking support (10, 10', 10", 10'", 10"") according to any one of claims 1 to 8, characterized in that The ferrite-rich layers (3, 3', 3", 3'", 3"") are formed of ferrite fillers arranged in an organic or inorganic matrix.
10. The coated metal cooking support (10, 10', 10", 10'", 10"") according to any one of claims 1 to 9, characterized in that The thickness of the thin conductive layer (4, 4', 4", 4'", 4"") is between 5 and 100 μm, preferably between 5 and 25 μm.
11. The coated metal cooking support (10, 10', 10", 10'", 10"") according to any one of claims 1 to 10, characterized in that The resistivity of the thin conductive layer (4, 4', 4", 4'", 4"") is between 1 and 100 μOhm.cm, preferably between 1 and 10 μOhm.cm.
12. The coated metal cooking support (10, 10', 10", 10'", 10"") according to any one of claims 1 to 11, characterized in that The thin conductive layer (4, 4', 4", 4'", 4"") is made of aluminum alloy, copper alloy, or silver alloy.
13. The coated metal cooking support (10, 10', 10", 10'", 10"") according to any one of claims 1 to 12, characterized in that The protective coating (5, 5', 5", 5'", 5") is a PTFE type coating, or an enamel type coating, or a lacquer type coating, or a ceramic type coating, or a sol-gel type coating, or a silicone resin-based coating, or a silicone-polyester resin-based coating.
14. The coated metal cooking support (10, 10') according to any one of claims 1 to 13, characterized in that The non-stick coating (1, 1') is a PTFE type coating, or a ceramic type coating, or a sol-gel type coating, or a silicone resin-based coating, or a silicone resin-polyester resin-based coating.
15. The coated metal cooking support (10, 10', 10", 10'", 10"") according to any one of claims 1 to 14, characterized in that Side walls (16, 16', 16", 16'", 16") rise around a bottom (13, 13', 13", 13'", 13") of the heating surface (12, 12', 12", 12'", 12") to form a cooking container (20, 20', 20", 20'", 20") 16. The coated metal cooking support (10, 10") according to claim 15, characterized in that The ferrite-rich layer (3, 3") and the thin conductive layer (4, 4") extend at least over a lower portion of the side wall (16, 16").
17. The coated metal cooking support (10, 10") according to any one of claims 15 or 16, characterized in that The ferrite-rich layer (3, 3") and the thin conductive layer (4, 4") extend over the entire side wall (16, 16").
18. The coated metal cooking support (10', 10'", 10"") according to any one of claims 15 or 16, characterized in that At least a portion of the sidewalls (16', 16'", 16"") are free of the ferrite rich layer and the thin conductive layer.
19. The coated metal cooking support (10', 10'", 10"") according to any one of claims 15, 16 or 18, characterized in that The entire side wall (16', 16'", 16"") is free of the ferrite-rich layer and the thin conductive layer.
20. A cooking utensil (140) comprising a coated metal cooking rack (100) and a gripping member (150) mounted on the coated metal cooking rack (100), characterized in that: The coated metal cooking support (100) is in accordance with any one of claims 1 to 19.
21. An electric cooking appliance (160) comprising a coated metal cooking rack (100) associated with an induction heating oven (170), characterized in that: The coated metal cooking support (100) is in accordance with any one of claims 1 to 19.