Cooking utensil

Abstract

The invention provides a cooking utensil which comprises an IH coil panel which comprises a panel body and a coil fixed on the panel body; the inner pot is arranged above the IH coil panel, and the inner pot can be heated under the action of a magnetic field of the IH coil panel; the magnetic isolation piece is arranged between the IH coil panel and the inner pot, the magnetic isolation piece comprises a magnetic isolation plate and a conducting ring, the conducting ring is arranged around the inner pot, the projection of at least part of the magnetic isolation plate on the panel body is located in the range of the projection of the coil on the panel body, and the projection of the conducting ring on the panel body is located outside the range of the projection of the coil on the panel body. According to the technical scheme, the problem that in the cooking utensil adopting IH heating in the related technology, food in the pot is not fully boiled and turned over can be effectively solved.

Description

Technical Field

[0001] This invention relates to the field of small household appliance technology, and more specifically, to a cooking appliance. Background Technology

[0002] IH heating uses the principle of electromagnetic induction to convert electrical energy into heat energy. It has the advantages of high heating efficiency, uniform heating, energy saving and environmental protection, and is increasingly used in cooking appliances such as electric pressure cookers, rice cookers and induction cookers.

[0003] However, due to its uniform heating characteristics, heat is transferred upwards from the bottom of the pot, making it difficult to generate sufficient thermal convection and tumbling within the pot. Consequently, the food in the pot does not boil and tumble sufficiently, thus affecting the taste of the food. Summary of the Invention

[0004] The main objective of this invention is to provide a cooking appliance that solves the problem in related technologies where food does not boil and swirl sufficiently in the pot of cooking appliances using IH heating.

[0005] To achieve the above objectives, the present invention provides a cooking appliance, comprising: an IH coil plate, including a plate body and a coil fixed on the plate body; an inner pot, disposed above the IH coil plate, the inner pot being able to be heated by the magnetic field of the IH coil plate; and a magnetic shielding component, disposed between the IH coil plate and the inner pot, the magnetic shielding component including a magnetic shielding plate and a conductive ring, the conductive ring being disposed around the inner pot, at least a portion of the projection of the magnetic shielding plate on the plate body being within the range of the projection of the coil on the plate body, and the projection of the conductive ring on the plate body being outside the range of the projection of the coil on the plate body.

[0006] Using the technical solution of this invention, the cooking appliance includes an IH coil, an inner pot, and a magnetic shielding component. The inner pot is heated by the magnetic field of the IH coil, thereby heating the food inside. A magnetic shielding component is positioned between the inner pot and the IH coil, effectively isolating or weakening the magnetic field generated by the IH coil. Specifically, the magnetic shielding component includes a magnetic shielding plate and a conductive ring. The conductive ring surrounds the inner pot, and at least a portion of the magnetic shielding plate's projection on the plate lies within the range of the coil's projection on the plate, meaning at least a portion of the magnetic shielding plate is within the range of the magnetic field generated by the coil. This allows the magnetic shielding plate to isolate or weaken this portion of the magnetic field, thus isolating or weakening the magnetic field acting on the inner pot at the position corresponding to the magnetic shielding plate. This results in the inner pot having a weak heating area corresponding to the magnetic shielding plate and a strong heating area offset from it. The liquid in the strong heating area flows towards the weak heating area, creating thermal convection from the strong heating area to the weak heating area. This allows the food inside the inner pot to tumble and be heated evenly under the action of thermal convection, ensuring the food is thoroughly cooked and has a consistent texture. Therefore, the technical solution of this application effectively solves the problem of insufficient boiling and tumbling of food in cooking appliances using IH heating in related technologies.

[0007] Furthermore, a conducting loop is connected to the outer ends of multiple magnetic shielding plates. By connecting the conducting loop to the outer ends of the magnetic shielding plates, it can achieve the formation of a circular current while being as far away from the coil as possible, thereby weakening or avoiding the magnetic field generated by the coil acting on the conducting loop and reducing the heat generated by the magnetic shielding components.

[0008] Furthermore, the outer end of the coil and the inner end of the conducting ring are spaced apart along the direction from the center to the edge of the disk. This arrangement allows the conducting ring to avoid the magnetic field generated by the coil as much as possible, reducing the heat generation of the magnetic shielding component while achieving conductivity.

[0009] Furthermore, in the direction from the center of the disk to the edge, the distance L1 between the outer end of the coil and the inner end of the conduction ring is greater than or equal to 3 mm and less than or equal to 100 mm. This arrangement allows the conduction ring to avoid the magnetic field generated by the coil as much as possible, reducing the heat generated by the magnetic shielding component while achieving conductivity.

[0010] Furthermore, in the direction from the center to the edge of the plate, the width W of the conducting ring is greater than or equal to 2 mm and less than or equal to 50 mm; and / or, the magnetic shielding component includes multiple magnetic shielding plates, which are spaced apart along the circumferential direction of the IH coil plate. Controlling the width W of the conducting ring within the above range can balance the ease of processing the conducting ring and material saving. At the same time, the above arrangement can ensure that the conducting ring has a sufficiently large flow area to reduce the heat generation at the magnetic shielding plates. The magnetic shielding component includes multiple magnetic shielding plates spaced apart along the circumferential direction of the IH coil plate, so that there are multiple weak heating areas on the inner pot, thereby generating multiple heat convections with different flow paths inside the inner pot. The food inside the inner pot can be fully tumbled and evenly heated under the action of these heat convections.

[0011] Furthermore, the magnetic shielding component has a hollowed-out area located inside the conductive ring and the magnetic shielding plate. This hollowed-out area has no structure, allowing the magnetic field generated by the coil to pass through it and act directly on the inner pot, ensuring that the inner pot generates sufficient heat to heat the food.

[0012] Furthermore, the magnetic shielding component includes multiple magnetic shielding plates, which are spaced apart along the circumferential direction of the IH coil. The hollowed-out area includes a central area and multiple extended areas disposed on the outer periphery of the central area. Each extended area is located between two adjacent magnetic shielding plates. In any circumferential direction of the magnetic shielding component, the width of the magnetic shielding plate is smaller than the width of the extended area. This arrangement controls the magnetic shielding area of ​​the magnetic shielding plate to be smaller than the magnetic transmission area of ​​the hollowed-out area, thereby ensuring a sufficiently large area of ​​strong heating on the inner pot to guarantee heating efficiency.

[0013] Furthermore, the inner end of the magnetic shield has a tapering section, the width of which gradually decreases from the edge to the center of the magnetic shield; and / or, the cooking appliance also includes a transparent cover over the IH coil and the magnetic shield. The tapering section allows for a wider outer area, thereby reducing the impact of the magnetic shield on heating efficiency, thus balancing the heating efficiency of the cooking appliance with the boiling effect inside the pot. The transparent cover over the IH coil and the magnetic shield protects them, preventing dust or food residue from accumulating on them and making cleaning difficult for the user.

[0014] Furthermore, the magnetic shielding component is made of a non-magnetic conductive material; and / or, the magnetic shielding component is a single-piece structure. The non-magnetic conductive material has excellent conductivity. When the magnetic field generated by the coil acts on the magnetic shielding component, eddy currents are generated on its surface. These eddy currents can generate a magnetic field opposite to the direction of the coil's magnetic field, thereby weakening or even canceling the original magnetic field, achieving the magnetic shielding effect. In addition, the heat generated by the magnetic field on the magnetic shielding component is relatively low, which can prevent the magnetic shielding component from melting or damaging its mounting structure. The magnetic shielding component is made from a single sheet of material, which simplifies the manufacturing process.

[0015] Furthermore, the cooking appliance also includes a pressure-bearing component mounted on the IH coil, which supports the inner pot. A magnetic shielding component is installed between the IH coil and the pressure-bearing component. The pressure-bearing component provides pressure resistance during the pressure cooking process. Installing the magnetic shielding component between the IH coil and the pressure-bearing component prevents direct pressure from acting on the magnetic shielding component, which could cause it to warp and affect its installation stability. In addition, the pressure-bearing component separates the inner pot and the magnetic shielding component, preventing direct current flow between the inner pot and the magnetic shielding component, thus avoiding any impact on the magnetic shielding capability of the magnetic shielding component.

[0016] Furthermore, the magnetic shielding component is installed on the plate body and spaced apart from the bottom wall of the inner pot. Installing the magnetic shielding component directly on the plate body has the advantages of low cost and simple structure, and users can directly see the structural changes in the cooking appliance. In addition, the above arrangement allows the magnetic shielding component to be spaced a certain distance from the inner pot, thus eliminating the need for insulation between the magnetic shielding component and the inner pot, further reducing product costs. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0018] Figure 1 An exploded structural diagram of a first embodiment of a cooking appliance according to the present invention is shown;

[0019] Figure 2 It shows Figure 1 A cross-sectional view of the cooking utensils;

[0020] Figure 3 It shows Figure 2 A magnified view of point A on the cooking utensil;

[0021] Figure 4 It shows Figure 1 A bottom view of the IH coil of a cooking appliance;

[0022] Figure 5 It shows Figure 1A three-dimensional structural diagram of the magnetic shielding component of a cooking utensil;

[0023] Figure 6 It shows Figure 5 Current flow diagram of the magnetic shielding component;

[0024] Figure 7 It shows Figure 1 A bottom view of the inner pot of a cooking appliance;

[0025] Figure 8 It shows Figure 7 A heat distribution diagram of the inner pot of a cooking appliance viewed from below;

[0026] Figure 9 An exploded structural diagram of a portion of the structure of a second embodiment of a cooking appliance according to the present invention is shown;

[0027] Figure 10 An exploded structural diagram of a portion of the structure of a cooking appliance according to a third embodiment of the present invention is shown.

[0028] The above figures include the following reference numerals:

[0029] 10. IH coil disc; 11. Disc body; 111. Main body; 112. Mounting rib; 113. Support recess; 114. Support leg; 12. Coil;

[0030] 20. Inner pot; 21. First heating zone; 22. Second heating zone;

[0031] 30. Magnetic shielding component; 31. Magnetic shielding plate; 311. Contraction section; 32. Conductive ring; 33. Hollowed-out area; 331. Central area; 332. Outer area;

[0032] 40. Transparent cover;

[0033] 50. Pressure-bearing component; 51. Support ring; 52. Support block. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0036] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0037] This application provides a cooking utensil, wherein... Figures 1 to 8 A schematic diagram of the structure of a first embodiment of the cooking appliance according to this application is shown. Figure 9 A schematic diagram of the structure of a second embodiment of the cooking appliance according to this application is shown. Figure 10 A schematic diagram of the structure of a second embodiment of the cooking appliance according to this application is shown.

[0038] like Figure 1 and Figure 2 As shown, this application provides a cooking appliance. A first embodiment of the cooking appliance includes: an IH coil 10, an inner pot 20, and a magnetic shielding component 30. The IH coil 10 includes a plate body 11 and a coil 12 fixed to the plate body 11. The inner pot 20 is disposed above the IH coil 10 and is heated by the magnetic field of the IH coil 10. The magnetic shielding component 30 is disposed between the IH coil 10 and the inner pot 20. The magnetic shielding component 30 includes a magnetic shielding plate 31 and a conductive ring 32. The conductive ring 32 surrounds the inner pot 20. At least a portion of the projection of the magnetic shielding plate 31 onto the plate body 11 is within the range of the projection of the coil 12 onto the plate body 11, and the projection of the conductive ring 32 onto the plate body 11 is outside the range of the projection of the coil 12 onto the plate body 11.

[0039] Using the technical solution of this embodiment, the cooking appliance includes an IH coil 10, an inner pot 20, and a magnetic shielding component 30. The inner pot 20 is heated by the magnetic field of the IH coil 10, thereby heating the food inside. The magnetic shielding component 30 is disposed between the inner pot 20 and the IH coil 10 and can isolate or weaken the magnetic field generated by the IH coil 10. Specifically, the magnetic shielding component 30 includes a magnetic shielding plate 31 and a conductive ring 32. The conductive ring 32 surrounds the inner pot 20. At least a portion of the projection of the magnetic shielding plate 31 onto the plate body 11 is within the range of the projection of the coil 12 onto the plate body 11, that is, at least a portion of the magnetic shielding plate 31 is within the range of the magnetic field generated by the coil 12, thereby enabling the magnetic shielding plate 31 to isolate this portion of the magnetic field. The magnetic field acting on the inner pot 20 corresponding to the position of the magnetic shielding plate 31 is isolated or weakened, resulting in a weak heating area corresponding to the magnetic shielding plate 31 and a strong heating area misaligned with the magnetic shielding plate 31 on the inner pot 20. Liquid in the strong heating area flows towards the weak heating area, forming thermal convection from the strong heating area to the weak heating area. This allows the food inside the inner pot 20 to tumble and be heated evenly under the action of these thermal convections, ensuring the food is thoroughly cooked and has a consistent texture. Therefore, the technical solution of this embodiment can effectively solve the problem of insufficient boiling and tumbling of food in cooking appliances using IH heating in related technologies.

[0040] Furthermore, this application does not limit the shape of the pan body. The pan body can be a flat structure or a bowl-shaped structure to heat the side wall of the inner pot as well. The aforementioned "projection of the magnetic shielding plate 31 on the pan body 11" and "projection of the coil 12 on the pan body 11" refer to projections onto the pan body 11 along the normal direction of the pan body 11. Figure 3 As shown, in this embodiment, the disk body 11 has a bowl-shaped structure, and the projection boundary of the outer end of the coil 12 on the disk body 11 is the straight line where the normal C1 is located. The above-mentioned "the projection of the conducting ring 32 on the disk body 11 is outside the range of the projection of the coil 12 on the disk body 11" means that it does not fall within the projection of the coil 12 on the disk body 11. For example, in this embodiment, the coil 12 has a ring structure, and the conducting ring 32 can be located inside the ring structure or outside the ring structure.

[0041] Specifically, such as Figure 5 As shown, the conductive ring 32 is a closed ring structure arranged around the outer periphery of the inner pot 20, and the conductive ring 32 is electrically connected to the magnetic shielding plate 31.

[0042] like Figure 3As shown, the disk body 11 includes a main body 111 and mounting ribs 112 for mounting the coil 12. The mounting ribs 112 are multi-turn, and mounting spaces are formed between adjacent mounting ribs 112. The aforementioned "projection of the magnetic shielding plate 31 on the disk body 11" and "projection of the coil 12 on the disk body 11" can be projected on the upper surface of the main body 111 or on the lower surface of the main body 111.

[0043] The coil 12 is an enameled wire wound in the installation space. High-frequency alternating current can be passed through the enameled wire, so that the coil 12 can generate an alternating electromagnetic field. The inner pot 20 is made of a highly magnetic material such as iron or stainless steel. Under the action of the alternating magnetic field, the inner pot 20 generates eddy currents to achieve efficient heating.

[0044] The magnetic shielding component 30 includes multiple magnetic shielding plates 31, which are spaced apart along the circumferential direction of the IH coil 10. The inclusion of multiple magnetic shielding plates 31 along the circumferential direction of the IH coil 10 results in multiple weak heating areas on the inner pot 20, thereby generating multiple heat convection currents with different flow paths inside the inner pot 20. This allows the food inside the inner pot 20 to tumble fully and be heated evenly under the influence of these heat convection currents.

[0045] It should be noted that, in describing the embodiments of this application, the term "multiple" refers to two or more.

[0046] In this embodiment, the magnetic shielding component 30 is made of a non-magnetic conductive material. Non-magnetic conductive materials have good conductivity. When the magnetic shielding component 30 is subjected to the magnetic field generated by the coil 12, eddy currents are generated on its surface. These eddy currents can generate a magnetic field opposite to the magnetic field of the coil 12, thereby weakening or even canceling the original magnetic field, achieving the magnetic shielding effect. Furthermore, due to its good conductivity, the heat generated by the magnetic shielding component 30 under the influence of the magnetic field is relatively low, preventing the magnetic shielding component 30 from melting or damaging its mounting structure. The conductive ring 32 connects multiple magnetic shielding plates 31, enabling the magnetic shielding component 30 to generate eddy currents when subjected to the magnetic field of the coil 12. Figure 6 The circular current indicated by the arrow in the middle ensures that the magnetic field generated by the current in the magnetic shielding component 30 is opposite to the magnetic field direction of the coil 12, so as to ensure the magnetic shielding effect of the magnetic shielding component 30.

[0047] Specifically, the aforementioned "non-magnetic conductive material" can be one or more of the following: aluminum, zinc, lead, tungsten, titanium, silver, gold, copper, etc.

[0048] like Figure 1 , Figure 3 , Figure 5 and Figure 6As shown, the conducting ring 32 is connected to the outer end of the magnetic shielding plate 31. The conducting ring 32 connects to the outer ends of multiple magnetic shielding plates 31, so as to achieve the connection of multiple magnetic shielding plates 31 to form a circular current, while being as far away from the coil 12 as possible, so as to weaken or avoid the magnetic field generated by the coil 12 acting on the conducting ring 32, thereby reducing the heat generation of the magnetic shielding component 30.

[0049] In an embodiment not shown in the figure, the conduction ring can also be connected to the inner end of multiple magnetic shielding plates. In this case, the outer end of the conduction ring needs to be as far away from the inner end of the coil as possible in the lateral direction.

[0050] Regardless of whether the conductive ring 32 is located at the inner or outer end of the multiple magnetic shielding plates 31, the number of conductive rings 32 is always one.

[0051] like Figure 2 and Figure 3 As shown, in the direction from the center to the edge of the disk 11, the outer end of the coil 12 and the inner end of the conducting ring 32 are spaced apart. This arrangement allows the conducting ring 32 to avoid the magnetic field generated by the coil 12 as much as possible, thereby reducing the heat generation of the magnetic shielding component 30 while achieving the conduction function.

[0052] like Figure 2 and Figure 3 As shown, in the direction from the center to the edge of the disk 11, the distance L1 between the outer end of the coil 12 and the inner end of the conductive ring 32 is greater than or equal to 3 mm and less than or equal to 100 mm. This arrangement allows the conductive ring 32 to avoid the magnetic field generated by the coil 12 as much as possible, reducing the heat generation of the magnetic shielding component 30 while achieving conductivity. Preferably, the distance L1 can be 3 mm, 5 mm, 8 mm, 10 mm, 20 mm, 30 mm, 40 mm, 50 mm, 60 mm, 70 mm, 80 mm, 90 mm, or 10 mm.

[0053] like Figure 2 and Figure 3 As shown, in the direction from the center to the edge of the disk 11, the width W of the conducting ring 32 is greater than or equal to 2 mm and less than or equal to 50 mm. Controlling the width W of the conducting ring 32 within the above range balances ease of processing and material saving. At the same time, this arrangement ensures that the conducting ring 32 has a sufficiently large flow area to reduce heat generation at the magnetic shielding plate 31. Preferably, the width W can be 2 mm, 5 mm, 10 mm, 20 mm, 30 mm, 40 mm, or 50 mm.

[0054] It should be noted that the "direction from the center of the disk 11 to the edge" mentioned above refers to the extension direction along the upper / lower surface of the cross section obtained by the vertical center plane of the disk 11.

[0055] like Figure 3 As shown, the projection boundary of the outer end of coil 12 on disk 11 is the straight line where normal C1 is located, and the projection boundary of the inner end of conduction ring 32 on disk 11 is the straight line where normal C2 is located. The aforementioned interval L1 refers to the distance between normal C1 and normal C2 on the upper surface of the cross section intercepted by the vertical center plane of disk 11; the aforementioned width W refers to the distance between normal C2 and the outer end of conduction ring 32 on the upper surface of the cross section intercepted by the vertical center plane of disk 11.

[0056] like Figure 1 , Figure 5 and Figure 6 As shown, the magnetic shielding component 30 has a hollow area 33, which is located inside the conductive ring 32 and the magnetic shielding plate 31. The hollow area 33 has no structure, so that the magnetic field generated by the coil 12 can pass through the hollow area 33 and act directly on the inner pot 20, ensuring that the inner pot 20 can generate enough heat to heat the food.

[0057] In this embodiment, by setting a magnetic shielding component 30 between the inner pot 20 and the IH coil 10, the magnetic lines of force generated by the coil 12 can be partially isolated, so that the heating area on the inner pot 20 has different strengths, and the tumbling inside the inner pot 20 forms multiple strong convection currents, ensuring the heating effect on the food.

[0058] In this embodiment, a magnetic shielding component 30 is added between the inner pot 20 and the IH coil plate 10 without making any changes to the structure of the inner pot 20. The structural modifications to the IH coil plate 10 are also relatively minor (mainly to achieve the installation of the magnetic shielding component 30), which has the advantages of low cost and minimal process changes.

[0059] Of course, in the embodiment not shown in the figure, a plate with a weaker magnetic shielding effect or a plate with an enhanced magnetic field effect can also be placed in the hollow area.

[0060] like Figure 1 , Figure 5 and Figure 6 As shown, the magnetic shielding component 30 includes multiple magnetic shielding plates 31, which are spaced apart along the circumferential direction of the IH coil 10. The hollowed-out area 33 includes a central area 331 and multiple extended areas 332 disposed on the outer periphery of the central area 331. Each extended area 332 is located between two adjacent magnetic shielding plates 31. In any circumferential direction of the magnetic shielding component 30, the width of the magnetic shielding plate 31 is smaller than the width of the extended area 332. This arrangement can control the magnetic shielding area of ​​the magnetic shielding plate 31 to be smaller than the magnetic transmission area of ​​the hollowed-out area 33, thereby ensuring that the inner pot 20 has a sufficiently large area of ​​strong heating zone to guarantee heating efficiency.

[0061] It should be noted that the phrase "the width of the magnetic shielding plate 31 is less than the width of the extended region 332" refers to the fact that the largest of the multiple width dimensions of the multiple magnetic shielding plates 31 is less than the smallest of the multiple width dimensions of the multiple extended regions 332. Specifically, in this embodiment, the multiple magnetic shielding plates 31 have the same shape and are evenly spaced in the circumferential direction of the IH coil disk. That is, in any circumferential direction of the magnetic shielding member 30, the width of the multiple magnetic shielding plates 31 is the same, and the width of the multiple extended regions 332 is the same, with the width of the magnetic shielding plate 31 being less than the width of the extended region 332.

[0062] Specifically, such as Figures 5 to 7 As shown, a first heating area 21 (i.e., a weak heating area) is formed on the inner pot 20 at the position corresponding to the magnetic shielding plate 31, and a second heating area 22 (i.e., a strong heating area) is formed on the inner pot 20 at the position corresponding to the hollow area 33. The liquid in the inner pot 20 corresponding to the second heating area 22 will flow toward the adjacent first heating area 21, thereby generating multiple heat convections with different flow paths inside the inner pot 20, so that the food inside the inner pot 20 can be fully tumbled and evenly heated under the action of these heat convections.

[0063] Figure 8 The diagram shows the heat distribution on the inner pot 20, where the red area has the highest temperature and the blue area has the lowest temperature. As the color changes from red through orange, yellow, and green to blue, the temperature of the inner pot 20 decreases.

[0064] like Figure 5 and Figure 6 As shown, the inner end of the magnetic shielding plate 31 has a contraction section 311, and the width of the contraction section 311 gradually decreases in the direction from the edge of the magnetic shielding member 30 to the center. The setting of the contraction section 311 allows the outer extension region 332 to have a larger width, thereby reducing the impact of the setting of the magnetic shielding plate 31 on the heating efficiency, so as to balance the heating efficiency of the cooking appliance and the boiling effect in the inner pot 20.

[0065] like Figure 5 and Figure 6 As shown, the magnetic shielding component 30 is a single-piece structure. That is, the magnetic shielding component 30 is made from a single sheet of material, which simplifies the manufacturing process of the magnetic shielding component 30.

[0066] like Figure 2 and Figure 3 As shown, the magnetic shielding component 30 is installed on the plate body 11 and spaced apart from the bottom wall of the inner pot 20. Installing the magnetic shielding component 30 directly on the plate body 11 has the advantages of low cost and simple structure, and allows the user to directly see the structural changes in the cooking appliance. Furthermore, the aforementioned arrangement allows the magnetic shielding component 30 to be spaced a certain distance from the inner pot 20, eliminating the need for insulation treatment between the magnetic shielding component 30 and the inner pot 20, further reducing product costs.

[0067] In this embodiment, the magnetic shielding component 30 is installed on the disk body 11. Specifically, the installation method can be snap-fit, locking, or pre-embedding the magnetic shielding component 30 during injection molding of the disk body 11. Of course, as... Figure 2 and Figure 3 As shown, an installation groove can be directly provided at the upper end of the disk body 11, and a flange structure can be provided at the upper end of the magnetic shielding component 30. When installing the magnetic shielding component and the IH coil disk 10, the flange structure can be directly aligned with the installation groove to install the magnetic shielding component 30 on the disk body 11. Of course, in order to ensure the installation of the magnetic shielding component 30 firmly, screws or other fasteners can be further provided to fix the magnetic shielding component 30 on the disk body 11.

[0068] Of course, in embodiments not shown in the figure, the magnetic shielding component can also be attached to the bottom wall of the inner pot, and an insulating layer can be provided between the magnetic shielding component and the inner pot to prevent the current on the magnetic shielding component and the inner pot from being directly connected and affecting the magnetic shielding component's magnetic shielding capability.

[0069] Figure 9 A schematic diagram of the structure of a second embodiment of the cooking appliance according to this application is shown. The following description mainly focuses on the parts of the second embodiment that differ from the first embodiment, with reference to the accompanying drawings. The parts that are the same in the two embodiments will not be described again.

[0070] Specifically, such as Figure 9 As shown, the cooking appliance also includes a transparent cover 40 that covers the IH coil 10 and the magnetic shield 30. The transparent cover 40 protects the IH coil 10 and the magnetic shield 30, preventing dust or food residue from accumulating on them and making cleaning difficult for the user. Furthermore, the transparent cover 40 allows the user to clearly see the IH coil 10 and the magnetic shield 30, providing a direct visual understanding of the structural improvements to the cooking appliance.

[0071] Figure 10 A schematic diagram of the structure of a third embodiment of the cooking appliance according to this application is shown. The following description mainly focuses on the parts of the third embodiment that differ from the first embodiment, with reference to the accompanying drawings. The parts that are the same in the two embodiments will not be described again.

[0072] In this embodiment, the cooking appliance also includes a pressure-bearing member 50 disposed on the IH coil 10. The pressure-bearing member 50 supports the inner pot 20, and a magnetic shielding member 30 is installed between the IH coil 10 and the pressure-bearing member 50. The pressure-bearing member 50 can bear pressure during the pressure cooking process. Installing the magnetic shielding member 30 between the IH coil 10 and the pressure-bearing member 50 can prevent pressure from directly acting on the magnetic shielding member 30, which could cause warping or other deformation and affect the installation firmness of the magnetic shielding member 30. In addition, the pressure-bearing member 50 can separate the inner pot 20 and the magnetic shielding member 30, thus eliminating the need for insulation treatment between the magnetic shielding member 30 and the inner pot 20, further reducing product costs.

[0073] in, Figure 10 The diagram only shows the structure of the pressure-bearing component 50 and the disc body 11 of the IH coil disc 10. The pressure-bearing component 50 includes a support ring 51 and a plurality of support blocks 52 disposed on the support ring 51. The disc body 11 includes a main body 111, a plurality of support recesses 113 disposed on the main body 111, and a plurality of support legs 114. The plurality of support blocks 52 are inserted into the plurality of support recesses 113 in a corresponding manner. The magnetic shielding component 30 is located between the main body 111 and the support ring 51. The gap between the support ring 51 and the main body 111 is greater than the thickness of the magnetic shielding component 30. The pressure exerted by the inner pot 20 on the support ring 51 is transmitted to the main body 111 via the support blocks 52 and to the bottom wall of the heat preservation cover via the support legs 114. The pressure transmission process does not pass through the magnetic shielding component 30, thereby avoiding warping or other deformation that would affect the installation firmness of the magnetic shielding component 30.

[0074] In the description of this invention, it should be understood that "a plurality of" means two or more. Directional terms such as "front, back, up, down, left, right," "horizontal, vertical, perpendicular, horizontal," and "top, bottom" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are used solely for the convenience of describing the invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of protection of this invention. The directional terms "inner" and "outer" refer to the inner or outer contours relative to the outline of each component itself.

[0075] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0076] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0077] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A cooking utensil, characterized in that, include: IH coil disk (10) includes disk body (11) and coil (12) fixed on disk body (11); The inner pot (20) is positioned above the IH coil disk (10), and the inner pot (20) can be heated by the magnetic field of the IH coil disk (10); A magnetic shielding component (30) is disposed between the IH coil disc (10) and the inner pot (20). The magnetic shielding component (30) includes a magnetic shielding plate (31) and a conductive ring (32). The conductive ring (32) is disposed around the inner pot (20). At least part of the projection of the magnetic shielding plate (31) on the disc body (11) is located within the range of the projection of the coil (12) on the disc body (11). The projection of the conductive ring (32) on the disc body (11) is located outside the range of the projection of the coil (12) on the disc body (11).

2. The cooking utensil according to claim 1, characterized in that, The conductive ring (32) is connected to the outer end of the magnetic shielding plate (31).

3. The cooking utensil according to claim 2, characterized in that, In the direction from the center of the disk body (11) to the edge, the outer end of the coil (12) is spaced apart from the inner end of the conducting ring (32).

4. The cooking utensil according to claim 3, characterized in that, In the direction from the center of the disk body (11) to the edge, the distance L1 between the outer end of the coil (12) and the inner end of the conducting ring (32) is greater than or equal to 3 mm and less than or equal to 100 mm.

5. The cooking utensil according to any one of claims 2 to 4, characterized in that, In the direction from the center to the edge of the disk body (11), the width W of the conductive ring (32) is greater than or equal to 2 mm and less than or equal to 50 mm; and / or, The magnetic shielding component (30) includes a plurality of magnetic shielding plates (31), which are spaced apart along the circumferential direction of the IH coil disk (10).

6. The cooking utensil according to any one of claims 2 to 4, characterized in that, The magnetic shielding component (30) has a hollow area (33) located inside the conductive ring (32) and inside the magnetic shielding plate (31).

7. The cooking utensil according to claim 6, characterized in that, The magnetic shielding component (30) includes a plurality of magnetic shielding plates (31), which are spaced apart along the circumferential direction of the IH coil disk (10). The hollow area (33) includes a central area (331) and a plurality of extended areas (332) disposed on the outer periphery of the central area (331). Each extended area (332) is located between two adjacent magnetic shielding plates (31). In any circumferential direction of the magnetic shielding component (30), the width of the magnetic shielding plate (31) is smaller than the width of the extended area (332).

8. The cooking utensil according to any one of claims 1 to 4, characterized in that, The inner end of the magnetic shielding plate (31) has a tapering section (311), the width of which gradually decreases in the direction from the edge of the magnetic shielding member (30) to the center; and / or, The cooking appliance also includes a transparent cover (40) covering the IH coil (10) and the magnetic shield (30).

9. The cooking utensil according to any one of claims 1 to 4, characterized in that, The magnetic shielding element (30) is made of a non-magnetic conductive material; and / or, The magnetic shielding component (30) is an integral structure.

10. The cooking utensil according to any one of claims 1 to 4, characterized in that, The cooking appliance also includes a pressure-bearing member (50) disposed on the IH coil (10), the pressure-bearing member (50) being used to support the inner pot (20), and the magnetic shielding member (30) being installed between the IH coil (10) and the pressure-bearing member (50).

11. The cooking utensil according to any one of claims 1 to 4, characterized in that, The magnetic shielding component (30) is installed on the plate body (11) and spaced apart from the bottom wall of the inner pot (20).

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