Cooking utensil
By setting up multiple heating elements inside the oven and independently controlling the temperature adjustment of each cavity area, the problem of uneven temperature inside existing ovens is solved, achieving precise heating and adapting to diverse cooking needs.
Patent Information
- Application Number
- CN202520172243.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-24
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2035-01-24
AI Technical Summary
The temperature inside the existing oven is uneven and cannot be adjusted independently, resulting in inaccurate heating and failing to meet diverse usage needs.
Multiple heating components are used to correspond to multiple cavity areas, and each heating component is independently controlled by a control device to achieve precise temperature regulation of each cavity area.
It achieves precise temperature control throughout the oven, meeting diverse usage needs and scenarios, and adapting to the heating requirements of different foods.
Smart Images
Figure CN223830903U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of cooking utensils technology, and in particular to a cooking utensil. Background Technology
[0002] Existing conventional ovens typically use stainless steel heating elements to achieve radiant heating. However, stainless steel heating elements have cold ends at both ends, meaning their temperature is significantly lower than the temperature at the center of the heating element. Therefore, the center temperature of such ovens is high, while the left and right ends are relatively low, and the temperature in different parts of the oven cannot be independently adjusted.
[0003] This results in uneven heating of food in different parts of the oven, and the temperature control in different parts of the oven is not precise enough, thus failing to meet more usage needs and a wider range of usage scenarios. Utility Model Content
[0004] The main purpose of this invention is to provide a cooking appliance that can individually adjust the temperature of multiple cavity areas within the heating chamber, thereby meeting diverse usage needs and scenarios.
[0005] To achieve the above objectives, this utility model proposes a cooking appliance, comprising: a main body, a first heating device, and a control device; the main body has a heating chamber and an opening that communicates with and can be opened and closed, the heating chamber being divided into multiple cavity areas on a horizontal plane, and the upper end of the main body having a heating area located above the heating chamber, the heating area being used for placing and heating cookware; the first heating device is disposed in the main body, the first heating device comprising multiple heating groups, the multiple heating groups being arranged corresponding to the multiple cavity areas, each heating group comprising two heating elements arranged vertically opposite each other, and the two heating elements comprising a lower heating element located at the lower end of the heating chamber and an upper heating element located at the upper end of the heating chamber; a second heating device is installed in the main body and is arranged corresponding to the heating area, and is at least partially located between the top of the heating chamber and the heating area, for heating cookware in the heating area; and the control device is electrically connected to the multiple heating elements and the second heating device, so as to independently control each heating element, so as to independently heat the multiple cavity areas respectively.
[0006] In one embodiment, the height of the main body in the vertical direction is A, where 70mm ≤ A ≤ 150mm; and / or,
[0007] The distance B between the top surface of the heating chamber and the upper end surface of the main body is 20mm≤B≤30mm.
[0008] In one embodiment, the cooking appliance includes an oven and a baking pan, wherein a plurality of heating cavities are spaced apart within the baking pan, and the plurality of heating cavities are arranged corresponding to the plurality of cavity areas.
[0009] In one embodiment, the heating element includes a plate heating element, the plate heating element comprising:
[0010] A substrate made of an insulating and thermally conductive material, the substrate having two sides located in its thickness direction; and,
[0011] A heated metal wire is wound around the substrate and distributed on both sides of the substrate.
[0012] In one embodiment, the plate heating element further includes two protective plates made of insulating and thermally conductive material, which are disposed on opposite sides of the substrate and cover the heating wire.
[0013] In one embodiment, the substrate and / or the protective plate are made of mica sheets or thermally conductive ceramic; and / or,
[0014] The protective plate is connected to the substrate via a connection structure.
[0015] In one embodiment, the connecting structure includes a side strip with a retaining groove extending along its length, wherein the edge of the protective plate and the substrate is retained within the retaining groove; and / or,
[0016] The protective plate and the substrate are provided with riveting holes, and the connection structure includes a riveting member, which passes through a plurality of the riveting holes to rivet the protective plate and the substrate.
[0017] In one embodiment, a plurality of slots are provided on both sides of the substrate, and the plurality of slots are for the heating metal wire to be wound and fixed.
[0018] In one embodiment, the thickness of the plate heating element is set to D, where 0.8 mm ≤ D ≤ 2 mm; and / or,
[0019] The thickness of the substrate is d1, 0.2mm≤d1≤0.6mm; and / or,
[0020] The diameter of the heating wire is d2, where 0.05mm ≤ d2 ≤ 0.15mm.
[0021] In one embodiment, the plate heating element is elongated, and in at least one heating group, the upper heating element and the lower heating element are arranged in a cross configuration; or,
[0022] In at least one of the heating groups, the upper heating element and the lower heating element are arranged in parallel; and / or,
[0023] The heating element may be square, round, ring-shaped, or irregularly shaped.
[0024] In one embodiment, the upper heating element and / or the lower heating element are disposed inside or outside the heating chamber.
[0025] In one embodiment, the second heating device includes an electromagnetic heating device; and / or,
[0026] A heat insulation component is provided inside the main body and between the second heating device and the heating chamber.
[0027] The technical solution of this utility model adopts the method of independently controlling each heating element, thereby enabling independent heating of different cavity areas corresponding to the heating element and regulating the temperature of each part of the cavity, thus achieving the technical effect of meeting diverse usage needs. Attached Figure Description
[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.
[0029] Figure 1 A three-dimensional structural schematic diagram of an embodiment of the cooking utensil provided by this utility model;
[0030] Figure 2 for Figure 1 A three-dimensional structural diagram of a Chinese cooking utensil after it has been cut open;
[0031] Figure 3 for Figure 1 Schematic diagram of the structure of the heating element;
[0032] Figure 4 for Figure 3 Explosion diagram of the intermediate heating element;
[0033] Figure 5 for Figure 1 A perspective view of one embodiment of the first heating device in a cooking appliance;
[0034] Figure 6 for Figure 1 A perspective view of another embodiment of the first heating device in a cooking appliance;
[0035] Figure 7 for Figure 1 A perspective view of yet another embodiment of the first heating device in a cooking appliance.
[0036] Explanation of icon numbers:
[0037] 100. Cooking appliance; 1. Main body; 11. Heating chamber; 12. Opening; 13. Heating zone; 2. First heating device; 21. Heating group; 211. Heating element; 211a. Upper heating element; 211b. Lower heating element; 2111. Base plate; 21111. Slot; 2112. Heating wire; 2113. Protective plate; 2114. Connecting structure; 21141. Edge strip; 21142. Riveting part; 3. Second heating device; 4. Baking pan; 5. Heat insulation part.
[0038] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.
[0040] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.
[0041] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.
[0042] Existing conventional ovens have uneven internal temperatures and the temperature in different areas cannot be adjusted, so the temperature control in different parts of the oven is not precise enough, which cannot meet more usage needs and a wider range of usage scenarios.
[0043] This utility model proposes a cooking utensil.
[0044] Please see Figure 1 and Figure 2 In one embodiment of this utility model, the cooking appliance 100 includes a main body 1, a first heating device 2, and a control device. The main body 1 has a heating chamber 11 and an opening 12 that communicates with and can be opened and closed. The heating chamber 11 is divided into multiple cavity areas on a horizontal plane. The upper end of the main body 1 has a heating area 13 located above the heating chamber 11, which is used for placing cookware for heating. The first heating device 2 is disposed on the main body 1 and includes multiple heating groups 21. The multiple heating groups 21 are arranged corresponding to the multiple cavity areas. Each heating group 21 includes two heating elements 211 arranged vertically opposite each other (see details). Figures 5 to 7 The two heating elements 211 include a lower heating element 211b located at the lower end of the heating chamber 11 and an upper heating element 211a located at the upper end of the heating chamber 11; the second heating device 3 is installed in the main body 1 and is arranged corresponding to the heating area, and is at least partially located between the top of the heating chamber and the heating area, for heating the pot in the heating area 13; the control device is electrically connected to the multiple heating elements 211 and the second heating device 3, so as to be able to independently control each heating element 211, so as to be able to independently heat the multiple cavity areas respectively.
[0045] In the technical solution of this utility model, the main body 1 is the outer shell and internal frame of the cooking appliance 100. The main body 1 has a heating chamber 11, and a first heating device 2 is provided corresponding to the heating chamber 11 to heat the heating chamber 11. The main body 1 also has an opening 12 that communicates with the heating chamber 11 and can be opened and closed. The opening 12 allows a food container to be placed inside. After the food container is placed inside, the first heating device 2 heats the food. In order to ensure that the temperature of each part of the heating chamber 11 can be well controlled, the heating effect can be guaranteed, and various usage needs can be met. First, the heating chamber 11 is divided into multiple cavity areas on a horizontal plane. The first heating device 2 includes multiple heating groups 21, which are arranged corresponding to the multiple cavity areas. Each heating group 21 heats a separate, smaller cavity area, making it easier to achieve better temperature control for smaller cavity areas. Even if the heating element 211 in the heating group 21 has a cold end, the cold end can be placed outside the cavity area, so that the stable heating part of the heating element 211 is aligned with the cavity area, thereby enabling the cavity area to reach the required heating temperature. Second, to ensure that the food placed in a cavity area is heated evenly from top to bottom, each heating group 21 includes two heating elements 211 arranged vertically opposite each other. The two heating elements 211 include a lower heating element 211b located at the lower end of the heating chamber 11 and an upper heating element 211a located at the upper end of the heating chamber 11. Arranging two heating elements 211 corresponding to the same cavity area can also increase the heating speed. Finally, generally, food will not fill the entire heating chamber 11; the area occupied by food in the heating chamber 11 is limited. Since the control device is electrically connected to multiple heating elements 211, each heating element 211 can be controlled independently, and multiple cavity areas can be heated independently. In this case, only the heating group 21 corresponding to the cavity area occupied by the food needs to be turned on to heat the food, avoiding unnecessary heating of empty areas. In addition, this cooking appliance 100 also includes a second heating device 3. A heating area 13 is formed above the second heating device 3, at the upper end of the main body 1. Users can place pots and pans in the heating area to perform frying and stir-frying functions, allowing this cooking appliance 100 to meet more cooking needs. Therefore, this cooking appliance 100 can achieve heating and baking functions internally, and heating, frying, and stir-frying functions in the corresponding heating area on the upper surface. This cooking appliance 100 pursues multi-functionality while also being small and convenient. Therefore, in the vertical direction, the heating zone 13 and the heating chamber 11 are at least partially opposite each other; this makes the cooking appliance 100 occupy less space in the kitchen, which is more user-friendly for users with small apartments. Therefore, this cooking appliance 100 is a miniaturized, multi-functional integrated cooking appliance, such as a baking all-in-one machine, which can be placed directly on the countertop for cooking.
[0046] To reflect the miniaturized nature of this cooking appliance 100, the height of the main body 1 in the vertical direction is A, 70mm ≤ A ≤ 150mm. This design reduces the overall volume, making the product more compact and lightweight, and easier for users to use and store in different environments. The lower height design not only optimizes space utilization but is also particularly suitable for environments with limited space, such as kitchen countertops. Furthermore, within the main body 1, the larger the installation space for the second heating device 3, the smaller the space in the heating chamber 11. To allow for a larger heating space, the installation space for the second heating device 3 is minimized. In this embodiment, the distance between the top surface of the heating chamber 11 and the upper end surface of the main body 1 is B, 20mm ≤ B ≤ 30mm. It is understood that the installation height of the second heating device 3 in the main body 1 can be set to 20mm to 30mm. As for the installation space of the first heating device 2, it can be adapted to the thickness of the food in the heating chamber 11. For example, when the food is a pancake, the installation height of the first heating device 2 in the main body 1 can be 40mm to 50mm. When the food is a sweet potato, the installation height of the first heating device 2 in the main body 1 can be 120mm to 130mm.
[0047] The cooking appliance 100 of this invention includes an oven and a baking tray 4. To facilitate heating several different foods, the baking tray 4 has multiple heating chambers spaced apart. Different foods can be placed in different heating chambers to prevent mixing. Furthermore, different foods require different heating temperatures, so the multiple heating chambers are respectively positioned to correspond to multiple cavity areas. Multiple heating elements 21 heat the food in the multiple heating chambers, and a control device adjusts the power of the heating element 211 corresponding to each heating chamber to ensure that each food reaches its required temperature.
[0048] The arrangement of the heating element 211 can vary. In this embodiment, to ensure that the heating element 211 has a better heating effect in the vertical direction (corresponding to the thickness direction of the substrate 2111), the heating element 211 is configured as a plate heating element 211. Please refer to [link to relevant documentation]. Figures 3 to 4The plate heating element 211 includes a substrate 2111 and a heating wire 2112 wound around the substrate 2111. The heating wire 2112 is mainly distributed on both sides of the substrate 2111 along its thickness direction, so the heat transfer direction is vertical. The heat output of the heating element 211 can be adjusted by changing the distance between each turn of the heating wire 2112. Furthermore, the heating wire 2112 can be wound as close as possible to the end of the substrate 2111, ensuring that the distance between the heating wire 2112 and the end of the substrate 2111 is not less than 5mm, thus maintaining creepage distance. Compared to stainless steel heating tubes, this significantly shortens the cold end area. Since one side of the heating element 211 in the vertical direction corresponds to the cavity area, the heat generated by the heating wire 2112 on the other side of the substrate 2111 is difficult to be transmitted towards the cavity area. Therefore, the substrate 2111 is made of an insulating and thermally conductive material so that the heat generated by the heating wire 2112 on the other side of the substrate 2111 can also be transmitted to the cavity area through the substrate 2111, reducing heat waste.
[0049] To prevent leakage of electricity from the heating element 21 except at the connector, the plate heating element 211 also includes two protective plates 2113 made of insulating and thermally conductive material. The two protective plates 2113 are respectively disposed on both sides of the base plate 2111 and cover the heating wire 2112. The protective plates 2113 are provided with two through holes to facilitate the protrusion of the connector of the heating wire 2112 for wiring.
[0050] Since the protective plate 2113 encloses the substrate 2111 and the heating wire 2112, in order to transfer heat to the outside better, the protective plate 2113 needs to have good thermal conductivity and insulation properties. Therefore, the materials of the substrate 2111 and the protective plate 2113 can be mica sheets or thermally conductive ceramics. In addition, in order to make the substrate 2111, the heating wire 2112 and the protective plate 2113 form a whole, and to facilitate the installation of the protective plate 2113 and the substrate 2111, the protective plate 2113 is connected to the substrate 2111 through the connecting structure 2114.
[0051] The connection structure 2114 can take various forms. For example, in one embodiment, the connection structure 2114 includes a side strip 21141 with a retaining groove extending along its length. The protective plate 2113 and the edge of the substrate 2111 are retained in the retaining groove. By inserting the edges of the protective plate 2113 and the substrate 2111 into the retaining groove of the side strip 21141, mechanical fixation can be achieved. This configuration not only enables locking but also simplifies the assembly process, allowing for easy assembly and disassembly without additional fastening tools or steps. Using the side strip 21141 allows the heating wire 2112 to be wound as close as possible to the end of the substrate 2111, reducing the length of the cold end. In another embodiment, the protective plate 2113 and the base plate 2111 are provided with riveting holes. The connecting structure 2114 includes a riveting member 21142, which passes through multiple riveting holes to rivet the protective plate 2113 and the base plate 2111. Using the riveting member 21142 can prevent the overall thickness from increasing further during the connection process and provides better stability. To ensure the overall robustness of the heating element 211, in one embodiment, the edge strip 21141 and the riveting member 21142 can be provided simultaneously for connection.
[0052] To ensure the heating wires 2112 are evenly distributed on the substrate 2111, resulting in more uniform heat generation and facilitating winding, and to maintain a consistent spacing between each turn of the heating wires 2112, multiple slots 21111 are provided on both sides of the substrate 2111 for winding and fixing the heating wires 2112. This restricts changes in the position of the heating wires 2112, allowing for easier and more uniform distribution of the heating wires 2112 along the substrate 2111 during assembly.
[0053] To save installation space for the plate heating element 211 and reduce the overall size of the cooking appliance 100, the plate heating element 211 needs to be as thin and light as possible. The substrate 2111 needs sufficient strength to support the overall strength of the heating element 211, so it cannot be too thin, otherwise the heating element 211 will be easily damaged. However, it should not be too thick either, otherwise the installation space will be too large. Therefore, the thickness of the substrate 2111 is d1, 0.2mm ≤ d1 ≤ 0.6mm. For the heating wire 2112, the larger the diameter, the lower the resistance and the lower the corresponding heat generation. Therefore, the diameter of the heating wire 2112 should not be too large, but the smaller the diameter, the easier it is for the wire to break. Therefore, the diameter of the heating wire is d2, 0.05mm ≤ d2 ≤ 0.15mm. Considering the dimensions of the substrate 2111, the heating wire 2112, and the protective plate 2113, the thickness of the plate heating element 211 needs to meet the following requirement: the thickness of the plate heating element 211 is set to D, 0.8mm ≤ D ≤ 2mm.
[0054] This cooking appliance 100 features heating elements 211 with varying shapes and arrangements to suit different applications and needs. Specifically, for applications requiring uniform heating of the entire heating chamber 11, please refer to [the relevant documentation / reference]. Figure 5 The plate-type heating element 211 is elongated, allowing it to cover the space in the left-right or front-back direction within the heating chamber 11. To ensure coverage of all areas of the heating chamber 11, the upper heating element 211a and the lower heating element 211b are arranged in a cross configuration in at least one heating group 21. Ideally, one of the upper heating element 211a and the lower heating element 211b extends in the left-right direction, while the other extends in the front-back direction. A temperature sensor can be installed on the main body, extending into the heating chamber to monitor the internal temperature. When the area occupied by the heated food is small or when different temperatures need to be adjusted in different parts of the heating chamber 11, the upper heating element 211a and the lower heating element 211b are arranged in parallel in at least one heating group 21, corresponding to the same cavity area. Please refer to [link to relevant documentation]. Figure 6 In everyday food containers, the heating chamber is made into a long strip shape for grilling fish. In this case, the heating chamber can be aligned with the corresponding cavity area of the same heating group 21. Figure 5 The arrangement of the heating element 21 is also suitable for dual-compartment hot pots. For containers holding different foods, multiple heating chambers can be provided, and for aesthetic purposes, they may be designed in various shapes. Therefore, the heating element 211 can be various in shape, such as square, round, ring-shaped, or irregular. To heat the food within a single heating chamber... Figure 7 For example, please refer to Figure 7 Heating elements 211 are arranged in the vertical direction, and each corresponds to a separate heating chamber. Multiple heating groups 21 correspond to multiple heating chambers respectively.
[0055] The installation position of the heating element 211 can be flexibly set. It can be placed either outside or inside the partition surrounding the heating chamber 11. Placing it outside the partition avoids contamination of the heating element 211 by food or heating fumes, while placing it inside provides better heating performance. The placement positions of the upper heating element 211a and the lower heating element 211b are also relatively independent and can be set according to requirements. Figures 5 to 7 In the illustrated embodiment, both the upper heating element 211a and the lower heating element 211b are disposed on the outside of the partition, that is, on the outside of the heating chamber 11.
[0056] The second heating device 3 can be configured as an electromagnetic heating device. Other electrical components within the cooking appliance 100 are arranged vertically with the heating chamber 11. To prevent the high temperature generated by the heating element 211 from being transferred to the upper electromagnetic heating device or other electrical components when the cooking appliance 100 is used for oven heating, thus affecting the electrical components within the cooking appliance 100, a heat insulation element 5 is provided within the main body 1 and between the second heating device 3 and the heating chamber 11. The heat insulation element 5 extends horizontally and blocks the upward transfer of heat generated by the first heating device 2. This protects the second heating device 3 and other electrical components of the cooking appliance 100. The heat insulation element 5 can be configured as heat-insulating cotton or insulated glass.
[0057] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.
Claims
1. A cooking utensil (100), characterized in that, include: The main body (1) has a heating chamber (11) and an opening (12) that communicates with the heating chamber (11) and can be opened and closed. The heating chamber (11) is divided into multiple cavity areas on a horizontal plane. The upper end of the main body (1) has a heating area (13) located above the heating chamber (11). The heating area (13) is used for placing cookware for heating. A first heating device (2) is provided on the main body (1). The first heating device (2) includes a plurality of heating groups (21). The plurality of heating groups (21) are arranged corresponding to the plurality of cavity areas. Each heating group (21) includes two heating elements (211) arranged opposite each other. The two heating elements (211) include a lower heating element (211b) located at the lower end of the heating chamber (11) and an upper heating element (211a) located at the upper end of the heating chamber (11). A second heating device (3) is installed inside the main body (1) and is disposed corresponding to the heating zone, and is at least partially located between the top of the heating chamber and the heating zone, for heating the pot in the heating zone (13); The control device is electrically connected to the plurality of heating elements (211) and the second heating device (3) so as to independently control each of the heating elements (211) so as to independently heat the plurality of cavity regions.
2. The cooking appliance (100) as described in claim 1, characterized in that, The height of the main body (1) in the vertical direction is A, 70mm≤A≤150mm; and / or, The distance between the top surface of the heating chamber (11) and the upper end surface of the main body (1) is B, where 20mm≤B≤30mm.
3. The cooking appliance (100) as described in claim 1, characterized in that, The cooking appliance (100) includes an oven and a baking tray (4). The baking tray (4) has multiple heating chambers spaced apart and the multiple heating chambers are arranged corresponding to the multiple cavity areas.
4. The cooking appliance (100) as described in claim 1, characterized in that, The heating element (211) includes a plate heating element (211), which includes: A substrate (2111) made of an insulating and thermally conductive material, the substrate (2111) having two sides located in its thickness direction; and, A heating wire (2112) is wound around the substrate (2111) and arranged on both sides of the substrate (2111).
5. The cooking utensil (100) as described in claim 4, characterized in that, The plate heating element (211) also includes two protective plates (2113) made of insulating and thermally conductive material. The two protective plates (2113) are respectively disposed on both sides of the substrate (2111) and cover the heating wire (2112).
6. The cooking utensil (100) as described in claim 5, characterized in that, The substrate (2111) and / or the protective plate (2113) are made of mica sheets or thermally conductive ceramic; and / or, The protective plate (2113) is connected to the substrate (2111) via a connection structure (2114).
7. The cooking utensil (100) as described in claim 6, characterized in that, The connecting structure (2114) includes a side strip (21141), the side strip (21141) being provided with a retaining groove extending along its length direction, the protective plate (2113) being retained by the edge of the base plate (2111) within the retaining groove; and / or, The protective plate (2113) and the substrate (2111) are provided with riveting holes. The connecting structure (2114) includes a riveting member (21142), which passes through a plurality of the riveting holes to rivet the protective plate (2113) and the substrate (2111).
8. The cooking utensil (100) as described in claim 4, characterized in that, Multiple slots (21111) are provided on both sides of the substrate (21111), and the multiple slots (21111) are used for the heating metal wire (2112) to be wound and fixed.
9. The cooking utensil (100) as described in claim 4, characterized in that, The thickness of the plate heating element (211) is set to D, 0.8mm≤D≤2mm; and / or, The thickness of the substrate (2111) is d1, 0.2mm≤d1≤0.6mm; and / or, The diameter of the heating wire (2112) is d2, 0.05mm≤d2≤0.15mm.
10. The cooking utensil (100) as described in any one of claims 4 to 9, characterized in that, The plate heating element (211) is elongated, and in at least one heating group (21), the upper heating element (211a) and the lower heating element (211b) are arranged in a cross configuration; or, In at least one of the heating groups (21), the upper heating element (211a) and the lower heating element (211b) are arranged in parallel; and / or, The heating element (211) may be square, circular, annular or irregular in shape.
11. The cooking appliance (100) as claimed in claim 1, characterized in that, The upper heating element (211a) and / or the lower heating element (211b) are disposed inside or outside the heating chamber (11).
12. The cooking appliance (100) as claimed in claim 1, characterized in that, The second heating device (3) includes an electromagnetic heating device; and / or, A heat insulation element (5) is provided inside the main body (1) and between the second heating device (3) and the heating chamber (11).