Cooking utensil

Abstract

The present disclosure provides a cooking appliance and relates to the technical field of electromagnetic heating.SOLUTION: The cooking utensil includes an inner pot having a center line, and a first coil wound around the inner pot and configured to generate a magnetic field when energized, where a quantity of the first coils is at least two, magnetic fields generated by the at least two first coils have a same polarity, the first coil includes a long axis, and in a first plane on which the first coil is located, an included angle between the long axis and a first straight line satisfies a first angle. The long axis and the outermost turn of the first coil have a first intersection point and a second intersection point, a distance between the first intersection point and the second intersection point is greater than or equal to a distance between any other two points on the first coil, the first straight line is a straight line passing through a center of the first coil and a first center point, and the first center point is an intersection point of a center line of the inner pot and the first plane. In the present application, the hardness of the cooked rice is more uniform, and the surface thereof is flatter, thereby improving the heating effect.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] This application relates to the technical field of electromagnetic heating, and more particularly to cooking appliances. [Background technology]

[0002] In the related art, an electromagnetic cooking appliance generates a magnetic field through a coil disk, and generates a heating current in the pot through the magnetic field, thereby generating heat directly in the pot, and the thermal efficiency is significantly higher than that of traditional heating methods.

[0003] Because the coil discs are concentrated at the bottom of the pot, a strong magnetic field is likely to form at the bottom of the pot, which further concentrates the heating power within the strong magnetic field. As a result, the hardness of the cooked rice becomes uneven and the surface becomes uneven, which affects the heating effect. Summary of the Invention [Problem to be solved by the invention]

[0004] The present application aims to solve at least one of the technical problems existing in the prior art or related art. Therefore, the present application proposes a cooking utensil. [Means for solving the problem]

[0005] In view of the above, the present application provides a cooking utensil including an inner pot having a center line, and a first coil wound around the inner pot and configured to generate a magnetic field when electricity is applied, the number of the first coils being at least two, the magnetic fields generated by the at least two first coils having the same polarity, the first coil including a major axis, an angle between the major axis and the first line satisfying a first angle in a first plane in which the first coil exists, the major axis and the outermost turn of the first coil having a first intersection point and a second intersection point, and the distance between the first intersection point and the second intersection point is equal to or greater than the distance between any two other points on the first coil, the first line being a line passing through the center of the first coil and a first center point, and the first center point being an intersection point between the center line of the inner pot and the first plane.

[0006] In this technical solution, the cooking appliance includes, but is not limited to, a rice cooker, a soup cooker, and an electric pressure cooker, and the cooking appliance includes an inner pot, and the first coil is wound around the outer surface of the inner pot. The inner pot has a centerline. For example, if the inner pot is spherical or cylindrical, the centerline of the inner pot is an axis. For example, if the inner pot is rectangular or has another shape, the centerline of the inner pot is a straight line passing through the center of the pot opening and the center of the bottom wall of the inner pot.

[0007] For example, when energized, the first coil can generate a continuously alternating electromagnetic field, which continuously cuts through the metal pot, generating eddy currents in the metal sidewall of the inner pot. When the eddy currents flow through the metal pot, Joule heat is generated, which heats and cooks the food ingredients in the pot, such as rice and water.

[0008] The number of the first coils is at least two, and the at least two first coils are spaced apart. Illustratively, the first coils face the bottom wall of the inner hook, and the at least two first coils are spaced apart in the circumferential direction of the bottom wall of the inner hook.

[0009] The magnetic fields overlap between the at least two first coils, forming a strong magnetic field region, and the location where the strong magnetic field region intersects with the inner pot forms an ignition region. The heat transfer effect of the inner pot itself transfers the thermal energy from the ignition region to the weaker heat region.

[0010] The magnetic fields generated by the at least two first coils at the same time have the same polarity. Illustratively, the at least two first coils are connected in series and have the same winding direction, so the current direction in the at least two first coils is the same at the same time. As a result, the magnetic fields generated by the at least two first coils at the same time have the same polarity, forming a region of weakened magnetic field between two adjacent first coils (this region becomes a weak heat region in the inner pot) and a strong heat region opposite the weak heat region.

[0011] Based on this, in the present application, the heating coil at the bottom, i.e., the first coil, is configured as a coil that is not strictly circular, and the long axis of the first coil is configured to form an angle with a line passing through the center of the first coil and the first center point, where the long axis of the first coil is a line passing through the point where the width (or length) of the first coil is the greatest, and illustratively, of all the lines that have two intersections with the outermost one-turn coil of the first coil, the distance between the two intersections of the long axis of the first coil and the outermost one-turn coil, i.e., the first intersection and the second intersection, is the longest.

[0012] The first center point is defined as the intersection of the center line of the inner pot and the first plane on which the first coil exists. Therefore, the long axis of the first coil does not point to the first center point, but forms a first angle.

[0013] As a result, the end of the long axis of the first coil is away from the strong magnetic field area generated by the other first coil, and as a result, the distance between the strong heating areas created in the inner pot is increased, i.e., the distance from the strong heating area to the weak heating area is increased. As a result, the strong heating area moves to the edge of the bottom wall of the inner pot, and the weak heating area moves to the center of the bottom wall of the inner pot. The distribution of the strong heating area's location is more rational, the heat transfer effect from the strong heating area to the weak heating area is fully utilized, the heating power is distributed more evenly, the problem of excessive heat concentration in certain areas is solved, the rice and water in the cooker are heated more evenly, the cooked rice has a more uniform hardness and its surface is flatter, and the heating effect is improved.

[0014] In addition, the cooking appliance in the above technical solution of the present application may have the following additional technical features.

[0015] In some technical solutions of the present application, optionally, the range of the first angle is greater than 0° and less than or equal to 90°.

[0016] In this technical solution, when the angle between the major axis of the first coil and the first line is A, the following relational expression (1) is satisfied. 0° <A≦90°(1)

[0017] Here, A is the first angle, and the first straight line refers to the line that passes through the intersection of the center of the first coil and the center line of the inner hook on the first plane on which the first coil exists.

[0018] By setting the first angle range between 0° and 90°, the distribution of the positions of the high-heat and low-heat areas formed on the bottom wall of the inner pot by the first coil becomes more rational, thereby making the heating effect of the cookware more uniform and improving the cooking effect.

[0019] In some technical solutions of the present application, optionally, the range of the first angle is equal to or greater than 35° and equal to or less than 55°.

[0020] In this technical solution, when the angle formed by the long axis of the first coil and the first straight line is A, the following relational expression (2) is satisfied. 35° ≤ A ≤ 55° (2)

[0021] Here, the above-mentioned first straight line refers to a straight line passing through the center of the first coil and the intersection point of the center line of the inner pot in the first plane where the first coil exists in the first plane.

[0022] Exemplarily, the range of the first angle is 40° or more and 50° or less.

[0023] Exemplarily, the range of the first angle is 43° or more and 47° or less.

[0024] Exemplarily, the first angle is 45°.

[0025] By setting the range of the first angle between 35° and 55°, the distribution of the positions of the strong heating region and the weak heating region formed on the bottom wall of the inner pot by the first coil becomes more reasonable, whereby the heating effect of the cooking appliance becomes more uniform and the cooking effect is improved.

[0026] In some technical solutions of the present application, optionally, the number of the first coils is at least 3, and at least 3 first coils are provided at intervals in the circumferential direction of the inner pot.

[0027] In this technical solution, the cooking appliance is provided with 3 or more first coils, and the first coil may be located at the bottom of the inner pot, or a part of it may be located at the bottom of the inner pot and the rest may be located on the circumferential side of the inner pot. By providing at least 3 first coils, a relatively large area of the bottom wall of the inner pot can be evenly covered, and the heating effect can be improved.

[0028] Exemplarily, the number of the first coils is 3, and the 3 first coils are provided in a "pin" shape distribution at the bottom of the inner pot.

[0029] Illustratively, the number of first coils is four, and the four first coils include two sets of first coils arranged opposite each other, with the connecting wires of each set of oppositely arranged first coils all passing through the central axis of the first coil, and the connecting wires of the two sets of first coils being perpendicular to each other.

[0030] In the technical solution of the present application, at least three first coils are provided, which can uniformly cover a relatively large area of ​​the bottom wall of the inner pot, improving the heating effect, and also allowing the ingredients to move by convection within the inner pot, improving the cooking effect.

[0031] In some technical solutions of the present application, optionally, the first coil is an elliptical coil or a trapezoidal coil, or the first coil is an arc-shaped coil, and the width of the first coil increases from one end of the first coil toward the center point of the first coil, and decreases from the center point of the first coil toward the other end of the first coil.

[0032] In this technical solution, exemplarily, the first coil is an elliptical coil, and the major axis of the first coil is the major axis of the ellipse.

[0033] Illustratively, the first coil is a trapezoidal coil, where the trapezoidal coil includes a long side and a short side, and the long axis of the first coil is a line passing through the midpoint of the trapezoid's long side and the midpoint of the short side.

[0034] For example, the first coil is a "crescent" shaped coil, and the width of each first coil in the circumferential direction of the inner pot increases from one side toward the center and then decreases from the center toward the other side, so that the first coil has a shape that is narrow on both sides and wide in the middle. The major axis of the first coil is a straight line that has two intersections with the outermost layer of the first coil's conductor and the longest distance between the two intersections.

[0035] In the present invention, by providing a non-circular coil, the strong heat area and the weak heat area can be formed more rationally in the inner pot, and the distance between the strong heat area and the weak heat area can be increased, thereby avoiding the problem of excessive heat concentration.

[0036] In some technical solutions of the present application, optionally, the number of first coils is at least two, and the linear distance between the first intersection on one of two adjacent first coils and any one point on the other first coil is the longest, or the linear distance between the second intersection on one of two adjacent first coils and any one point on the other first coil is the longest.

[0037] In this technical solution, the number of first coils is at least two, and there are two intersection points between the major axis of the first coil and its outermost one-turn coil, i.e., the first intersection and the second intersection mentioned above, and there is a point at which the distance between the first intersection and any one point on another adjacent first coil is greater than the distance between any other point on the current coil and any one point on another adjacent first coil, i.e., the distance between the adjacent coils is greatest.

[0038] For example, the two adjacent first coils include coil 1 and coil 2, and the intersections between the long axis of coil 1 and the outermost one-turn coil of coil 1 are the first intersection and the second intersection, and the distance between the first intersection and any one point on coil 2 is the longest.

[0039] For example, the two adjacent first coils include coil 1 and coil 2, and the intersections between the long axis of coil 1 and the outermost one-turn coil of coil 1 are the first intersection and the second intersection, and the distance between the second intersection and any one point on coil 2 is the longest.

[0040] In the technical solution of this application, the intersection point between the long axis and the outermost turn of the coil is limited to the point where the distance to another adjacent coil is greatest. This allows the end of the long axis of the first coil to be away from the strong magnetic field area generated by the other first coil, and the strong heating area moves to the edge of the bottom wall of the inner pot, while the weak heating area moves to the central area of ​​the bottom wall of the inner pot. This makes the distribution of the strong heating area's location more reasonable, fully utilizes the heat transfer effect from the strong heating area to the weak heating area, and makes the distribution of heating power more uniform.

[0041] In some technical solutions of the present application, optionally, the cooking utensil further includes a holder assembly including a main body and a bottom disk, wherein the bottom disk is provided with a plurality of first winding portions, and a first coil is wound around the first winding portions.

[0042] In this technical solution, the cooking utensil includes a holder assembly, the holder assembly including a main body and a bottom disk, the bottom disk being provided with a plurality of first winding portions, the first winding portions being wound by a first coil, the first coil being a heating coil at the bottom of the cooking utensil. Illustratively, a storage cavity is formed inside the holder assembly, and the inner pot is located in the storage cavity.

[0043] Illustratively, the number of first coils is equal to the number of first winding sections, i.e., one first coil is wound per first winding section. Illustratively, the number of first coils is less than the number of first winding sections, i.e., there is at least one free first winding section. By providing more first winding sections, cooking appliances can use the same holder assembly regardless of the model or number of heating coils, improving the versatility and general-purpose nature of the holder assembly.

[0044] In some technical solutions of the present application, optionally, the cooking utensil further includes an inner pot including a side wall and a bottom wall, with a first coil arranged toward the bottom wall, and a second coil arranged on the main body and wound around the periphery of the side wall.

[0045] In this technical solution, the cooking utensil includes an inner pot and a second coil, the inner pot is used to contain food ingredients, such as rice-water mixture, the first coil is a bottom heating coil, the first coil is arranged toward the bottom wall of the inner pot and is used to heat the inner pot from below, the second coil is wound around the body of the holder assembly and the second coil is a side heating coil, the second coil is used to heat the inner pot in the circumferential direction of the inner pot.

[0046] Illustratively, the total heating power of the at least two first coils is greater than the heating power of the second coil.

[0047] Illustratively, the second coil includes a plurality of single-turn coils spaced apart along the height direction of the inner hook.

[0048] In the technical solution of the present application, by providing both bottom heating coil and side heating coil, the cooking utensil's heating effect on the inner pot and ingredients is more uniform.

[0049] In some technical solutions of the present application, optionally, the second coil and the first coil have the same direction of current at adjacent positions.

[0050] In this technical solution, at the same time, the direction of current in at least two first coils is the same, and the direction of current in adjacent positions of the second coil and the first coil is the same. In some embodiments, the second coil and the first coil are both wound clockwise or counterclockwise along the horizontal direction, and in this case, each one-turn coil of the second coil is approximately parallel to the first coil. In this case, the direction of current in the bottom one-turn coil of the second coil is the same as the direction of current in any of the first coils.

[0051] In some other embodiments, one side of one first coil is curved close to the bottom wall of the inner pot, and in this case, the curved side of the first coil is located adjacent to the second coil, i.e., the direction of the current in the curved part of the first coil is the same as the direction of the current in the part of the second coil that is close to the curved part of the first coil.

[0052] By having the same direction of current at adjacent positions of the first coil and the second coil, the magnetic fields of the first coil and the second coil can be superimposed on each other and strengthened, thereby improving cooking efficiency.

[0053] In some technical solutions of the present application, optionally, the second coil includes M layers of sub-coils spaced apart along the height direction of the inner pot, and at least N layers of the M layers of sub-coils are single-turn sub-coils, and N / M≧2 / 5 is satisfied.

[0054] In this technical solution, the present application proposes a heating coil, i.e., the above-mentioned second coil, which includes multiple layers of sub-coils spaced apart along the height direction of the inner pot. By providing multiple layers of sub-coils, the second coil can cover and wrap the side wall of the inner pot, thereby heating the inner pot evenly.

[0055] The number of coil turns is positively correlated with the heating power of the coil; the greater the number of coil turns, the stronger the generated magnetic field and the higher the heating power, and the more likely it is that the heating power will be localized, resulting in heat concentration problems. Due to limitations in the manufacturing process, the coil wire diameter cannot be made small enough. Therefore, to meet the maximum heating power requirements of the cookware and solve the problem of excessive heat concentration in localized areas, the cookware proposed herein is configured such that at least some of the subcoils in the multiple layers of the second coil are single-turn coils, where single-turn subcoils mean that there is only one turn of the subcoil at the same height. Furthermore, the ratio of the number of single-turn coils to the total number of subcoils is set to a specific percentage.

[0056] For example, if the coil portions at the same height in the second coil are one sub-coil and the total number of sub-coils is M, a total of M layers of sub-coils are provided in the height direction of the inner pot. Of the M sub-coils, at least N layers of sub-coils are single-turn sub-coils.

[0057] That is, if the total number of subcoils is M and the number of single-turn subcoils is N, M and N satisfy the relation N / M≧2 / 5.

[0058] In other words, the ratio of the number of layers of the single-turn coil to the total number of layers of the second coil must be 40% or more.

[0059] Illustratively, the second coil includes 100 layers of subcoils, of which 45 layers are single-turn subcoils.

[0060] Illustratively, the second coil includes 100 layers of subcoils, and all of the 100 layers of subcoils are single-turn subcoils.

[0061] In the technical solution of the present application, the heating coil is configured as multiple layers of sub-coils spaced apart along the height direction of the inner pot, and at least 40% of the sub-coils are single-turn coils. This effectively prevents heat from being excessively concentrated in a local area on the side wall of the inner pot, improving the uniformity of heating. When cooking rice, the hardness of the cooked rice can be made uniform and the surface can be made flat, improving the cooking effect of the cookware.

[0062] In some technical solutions of the present application, optionally, the inner pot further includes a side wall and a bottom wall, the first coil is disposed toward the bottom wall, and a projection of the side wall on a first plane in which the first coil exists overlaps with at least a portion of the first coil.

[0063] In this technical solution, a portion of the first coil extends from the edge of the bottom wall. When the first coil is energized, the magnetic field generated by the portion of the first coil extending from the edge of the bottom wall acts on the side wall of the pot body. Since a second coil is also provided on the side wall of the pot body, the magnetic field generated by energizing the second coil also acts on the side wall of the pot body. Therefore, the second coil and the portion of the first coil extending from the edge of the bottom wall jointly heat the side wall of the pot body, thereby forming an ignition area in the pot body.

[0064] At least two first coils are provided at the bottom of the kettle body, with two adjacent first coils spaced apart, and a weak heat area is formed at the gap between the two adjacent first coils.

[0065] The heat in the kettle body flows from the strong heat area to the weak heat area, so that the heat flows from the outside of the kettle body to the inside of the kettle body, the heat flow area is larger and the path is longer, so that the rice-water mixture in the kettle body is heated evenly and sufficiently, which greatly improves the moisture uniformity of the entire rice in the kettle and improves the texture for the user.

[0066] In some technical solutions of the present application, optionally, the inner pot further includes a side wall, a bottom wall, and a pot opening, the first coil is arranged toward the bottom wall, the projection of the side wall on a first plane in which the first coil exists overlaps with at least a portion of the first coil, and the portion of the first coil that overlaps with the projection of the side wall bends toward the pot opening.

[0067] In this technical solution, a portion of the first coil extends from the edge of the bottom wall, and the portion of the first coil extending from the edge of the bottom wall bends toward the opening, so that the bent portion of the first coil is covered by the side wall of the kettle body, and the second coil and the bent portion of the first coil can form an intense heat area in the kettle body.

[0068] Illustratively, at least two first coils are provided at the bottom of the kettle body, with two adjacent first coils spaced apart, and a weak heat area is formed in the gap between the two adjacent first coils.

[0069] The heat in the kettle body flows from the strong heat area to the weak heat area, so that the heat flows from the outside of the kettle body to the inside of the kettle body, the heat flow area is larger and the path is longer, so that the rice-water mixture in the kettle body is heated evenly and sufficiently, which greatly improves the moisture uniformity of the entire rice in the kettle and improves the texture for the user.

[0070] In some technical solutions of the present application, optionally, the inner pot further includes a pot opening, and the side wall includes a first wall section and a second wall section, a first end of the first wall section forms the pot opening, a second end of the first wall section is connected to a first end of the second wall section, and a second end of the second wall section is connected to the bottom wall, and the inner diameter of the second wall section decreases from the pot opening toward the bottom wall.

[0071] In this technical solution, the inner pot is a "spherical pot" and includes a pot opening, a side wall, and a bottom wall in this order in the height direction of the inner pot, where the side wall of the inner pot is divided into a first wall section and a second wall section, the first wall section being the wall section closer to the pot opening, and the second wall section being the wall section closer to the bottom wall. Illustratively, the junction between the first wall section and the second wall section is the position where the inner diameter of the inner pot is largest.

[0072] Since the area of ​​the bottom wall is smaller than the area of ​​the kettle opening, the second wall section is a hemispherical wall section that transitions inward, i.e., the inner diameter of the second wall section decreases from the kettle opening toward the bottom wall.

[0073] Illustratively, the first wall section is a cylindrical wall section.

[0074] Illustratively, the first wall section is a hemispherical wall section, and the inner diameter of the first wall section decreases from the bottom wall toward the kettle opening.

[0075] Illustratively, the area of ​​the kettle opening is equal to or greater than the area of ​​the bottom wall.

[0076] In the technical solution of the present application, a "spherical kettle" type inner pot is provided, which reduces the area of ​​the bottom wall and promotes the formation of convection between high and low temperatures inside the inner pot, thereby stirring the rice and water inside the pot and improving the cooking effect.

[0077] In some technical solutions of the present application, optionally, the second coil includes a plurality of sub-coils distributed along the height direction of the inner pot, and the plurality of sub-coils include a first sub-coil wound on the first wall section and a second sub-coil wound on the second wall section, and the diameter of the first sub-coil is equal to or greater than the diameter of the second sub-coil.

[0078] In this technical solution, the first wall section is a cylindrical wall section, i.e., the first wall section has a hollow cylindrical structure. The second wall section is a hemispherical wall section, and the second wall section becomes smaller inward from the kettle opening toward the bottom wall, so that the inner diameter of the second wall section becomes smaller closer to the bottom wall. For example, the second wall section is defined as the R portion of the inner kettle.

[0079] In the height direction of the inner pot, the second coil includes multiple layers of sub-coils, and illustratively, each layer of sub-coils is a single-turn coil.

[0080] Here, if the subcoil wound around the first wall section is defined as the first subcoil and the subcoil wound around the second wall section is defined as the second subcoil, the diameter of the first subcoil is equal to or greater than the diameter of the second subcoil, i.e., the second subcoil fits inward as the side wall of the inner pot tends to fit inward along the curved section of the inner pot. This avoids the problem of the second coil, which is located on the second wall section (i.e., the curved section of the inner pot), being too far away from the side wall of the inner pot, resulting in wasted energy, and improves the heating efficiency of the cooking utensil.

[0081] In some technical solutions of the present application, optionally, the cooking utensil further includes a base including a mounting post, and the holder assembly further includes a mounting portion, to which the mounting post is connected.

[0082] In this technical solution, the cooking appliance includes a base, and the holder assembly is attached to the base. Here, the base is provided with mounting posts, and illustratively the number of mounting posts is at least two. The holder assembly is provided with mounting portions corresponding to the mounting posts, and illustratively the tops of the mounting posts include screw holes, and the mounting portions include through-holes. When assembling, bolts are inserted into the through-holes of the mounting portions and then screwed into the screw holes of the mounting posts, thereby fixing the holder assembly to the base.

[0083] Illustratively, when the mounting portion and the mounting post are connected and mounted together, a gap remains between the holder assembly and the body of the base, thereby preventing the bottom coil from contacting the structure of the base and leaving space for the bottom coil to dissipate heat.

[0084] In the technical solution of the present application, the base and holder assembly are connected by mounting posts, which is easy to assemble and provides sufficient space for mounting and heat dissipation of the coil assembly, which is advantageous in reducing the complexity of the cooking appliance assembling process.

[0085] In some technical solutions of the present application, the cooking utensil optionally further includes a housing connected to the base and having the holder assembly located therein, and a lid connected to the housing in an openable and closable manner.

[0086] In this technical solution, the cooking utensil further includes a housing and a lid, the housing is connected to a base, the housing and the base define an attachment cavity, and the holder assembly is provided in the attachment cavity. The lid is openably connected to the top of the housing, and when the lid is in an open state, the opening of the storage cavity is exposed, allowing a user to insert or remove the inner pot. When the lid is in a closed state, the opening of the storage cavity is covered by the lid, and the inner pot is sealed even when it is in a preset position in the storage cavity.

[0087] In the present embodiment, the housing and lid form the exposed surfaces of the cookware, thereby encasing the internal components of the cookware and improving the reliability and appearance of the cookware. [Brief explanation of the drawings]

[0088] The above and / or additional aspects and advantages of the present application will become apparent and easier to understand from the following description of the embodiments with reference to the drawings. [Figure 1] 1A and 1B show structural schematic diagrams of cooking utensils according to some embodiments of the present application. [Figure 2] 1A and 1B show structural schematic diagrams of cooking utensils according to some embodiments of the present application. [Figure 3] 1A and 1B show structural schematic diagrams of cooking utensils according to some embodiments of the present application. [Figure 4A] 1A and 1B show structural schematic diagrams of cooking utensils according to some embodiments of the present application. [Figure 4B] 1A and 1B show structural schematic diagrams of cooking utensils according to some embodiments of the present application. [Figure 4C] 1A and 1B show structural schematic diagrams of cooking utensils according to some embodiments of the present application. [Figure 4D] 1A and 1B show structural schematic diagrams of cooking utensils according to some embodiments of the present application. [Figure 4E] 1A and 1B show structural schematic diagrams of cooking utensils according to some embodiments of the present application. [Figure 5] 1 shows a schematic diagram of the thermal field of the inner pot according to some embodiments of the present application; [Figure 6] 1 shows a schematic diagram of the thermal field of the inner pot according to some embodiments of the present application; [Figure 7] 1 shows a schematic diagram of the thermal field of the inner pot according to some embodiments of the present application; [Figure 8] 1 shows a schematic diagram of the thermal field of the inner pot according to some embodiments of the present application; [Figure 9] 1A and 1B show structural schematic diagrams of cooking utensils according to some embodiments of the present application. [Figure 10] 1 shows a schematic diagram of the thermal field of the inner pot according to some embodiments of the present application; [Figure 11]1A and 1B show structural schematic diagrams of cooking utensils according to some embodiments of the present application. [Figure 12] 1A and 1B show structural schematic diagrams of cooking utensils according to some embodiments of the present application. [Figure 13] 1 shows a structural schematic diagram of a base according to some embodiments of the present application; DETAILED DESCRIPTION OF THE INVENTION

[0089] In order to more clearly understand the above objects, features and advantages of the present application, the present application will be described in more detail below with reference to the drawings and specific embodiments. It should be noted that, if there is no conflict, the embodiments and features in the embodiments of the present application can be combined with each other.

[0090] In the following description, numerous specific details are set forth to provide a thorough understanding of the present application, but the scope of protection of the present application is not limited to the specific embodiments disclosed below, as the present application may be implemented in other ways different from those described.

[0091] Hereinafter, cooking utensils according to several embodiments of the present invention will be described with reference to FIGS.

[0092] In some embodiments of the present application, a cooking utensil is provided, and FIGS. 1 to 4E are structural schematic diagrams of the cooking utensil according to some embodiments of the present application. As shown in FIGS. 1, 2, 3, 4A, 4B, 4C, 4D, and 4E, the cooking utensil 100 includes an inner pot 130 having a center line P, and a first coil 120 wound around the inner pot 130 and configured to generate a magnetic field when electricity is applied, the number of the first coils 120 is plural, and the magnetic fields generated by at least two of the first coils 120 have the same polarity, and the first coils 120 are: In a first plane 122 including the major axis 124 and on which the first coil 120 exists, the angle formed by the major axis 124 and a first straight line 126 satisfies a first angle, the major axis 124 and the outermost turn of the first coil 120 have a first intersection point X1 and a second intersection point X2, and the distance between the first intersection point X1 and the second intersection point X2 is equal to or greater than the distance between any other two points on the first coil, the first straight line 126 is a line passing through the center of the first coil 120 and a first center point, and the first center point is an intersection point between the center line of the inner hook 130 and the first plane 122.

[0093] In this embodiment, the plane XY in FIG. 1 is the first plane 122. The cooking utensil 100 includes, but is not limited to, a rice cooker, a soup cooker, and an electric pressure cooker. The cooking utensil 100 includes an inner pot 130, and the first coil 120 is wound around the inner pot 130. The inner pot 130 has a center line P. For example, if the inner pot 130 is spherical or cylindrical, the center line P of the inner pot 130 is an axis. For example, if the inner pot 130 is rectangular or has a rectangular shape, the center line P of the inner pot 130 is a straight line passing through the center point of the pot opening and the center point of the bottom wall of the inner pot.

[0094] For example, when energized, the first coil 120 can generate a continuously alternating electromagnetic field, which continuously cuts through the metal pot, generating eddy currents in the metal side wall 132 of the inner pot 130. When the eddy currents flow through the metal pot, Joule heat is generated, thereby heating and cooking the foodstuffs in the pot, such as rice and water.

[0095] The number of first coils 120 is plural, and at least two first coils 120 are provided with an interval therebetween.

[0096] Illustratively, the first coil 120 faces the bottom wall 134 of the inner hook 130, and at least two first coils 120 are provided spaced apart in the circumferential direction of the bottom wall of the inner hook.

[0097] Figures 5 to 8 and 10 show schematic diagrams of the thermal field of the inner pot 130 according to some embodiments of the present application, and Figure 9 shows a structural diagram of a cooking utensil 100 according to some embodiments of the present application. As shown in Figures 5, 6, 7, 8, and 10, a strong magnetic field region is formed in the overlapping region of the magnetic fields between at least two first coils 120 due to the magnetic field superposition effect, and the position where the strong magnetic field region intersects with the inner pot 130 becomes a strong-heat region. Arrows a in Figures 5, 6, 7, 8, and 10 point to the strong-heat region, and arrow b points to the weak-heat region. The arrows in Figures 6, 8, and 10 indicate the direction of heat transfer from the strong-heat region to the weak-heat region, and the thermal energy of the strong-heat region is transferred to the weak-heat region due to the heat transfer effect of the inner pot 130 itself.

[0098] The magnetic fields generated at the same time by at least two first coils 120 have the same polarity. Illustratively, the at least two first coils 120 are connected in series and have the same winding direction, so that the current direction in the at least two first coils 120 is the same at the same time. As a result, the magnetic fields generated at the same time by the at least two first coils 120 have the same polarity, forming a region of weakened magnetic field between two adjacent first coils 120 (this region becomes a weak heat region in the inner pot) and a strong heat region opposite the weak heat region.

[0099] As shown in FIGS. 1, 9, and 11, in this application, the heating coil at the bottom, i.e., the first coil 120, is configured as a coil that is not strictly circular. The long axis 124 of the first coil 120, L in FIG. 1, is set as the long axis length of the first coil 120, and H is set as the short axis length of the elliptical coil. The long axis 124 forms an angle with a line passing through the center of the circle and the first center point of the first coil 120. Here, the long axis 124 of the first coil 120 is the line passing through the widest point (or length) of the first coil 120. For example, among all the lines having two intersections with the outermost one-turn coil of the first coil 120, the line with the longest distance between the long axis 124 of the first coil 120 and the outermost one-turn coil, i.e., the first intersection point X1 and the second intersection point X2, is the longest. X1 and X2 in FIG. 4B represent the first intersection point X1 and the second intersection point X2.

[0100] The first center point is defined as the intersection point between the center line P of the inner hook 130 and the first plane 122 on which the first coil 120 exists, and therefore the long axis 124 of the first coil 120 does not point to the first center point, but rather there is a first angle. Point O in Fig. 1 indicates the first center point, and straight line P in Fig. 2 indicates the center line of the inner hook 130.

[0101] As a result, the end of the long axis 124 of the first coil 120 is away from the strong magnetic field area generated by another first coil, and as a result, the distance between the strong heating areas generated in the inner pot is increased, i.e., the distance between the strong heating area and the weak heating area is increased. As a result, the strong heating area moves to the edge of the bottom wall 134 of the inner pot 130, and the weak heating area moves to the center region of the bottom wall 134 of the inner pot 130. The distribution of the strong heating area's location is more rational, the heat transfer effect from the strong heating area to the weak heating area is fully utilized, the heating power is distributed more evenly, the problem of excessive heat concentration in local areas is solved, the rice and water in the cooking utensil 100 are heated more evenly, the cooked rice has a more uniform hardness and a flatter surface, and the heating effect is improved.

[0102] In some embodiments of the present application, optionally, the range of the first angle is greater than 0° and less than or equal to 90°, as shown in FIG.

[0103] In this embodiment, when the angle formed between the major axis 124 of the first coil 120 and the first line is A, the following relational expression (1) is satisfied. 0° <A≦90°(1)

[0104] Here, A is the first angle, and the first straight line 126 refers to a straight line passing through the intersection of the center of the first coil 120 and the center line of the inner hook 130 on the first plane 122 on which the first coil 120 exists.

[0105] By setting the first angle range between 0° and 90°, the distribution of the positions of the high-heat and low-heat areas formed on the bottom wall of the inner pot by the first coil 120 becomes more rational, thereby making the heating effect of the cookware 100 more uniform and improving the cooking effect.

[0106] In some embodiments of the present application, optionally, the first angle ranges from 35° to 55°, as shown in FIG.

[0107] In this embodiment, when the angle formed between the major axis 124 of the first coil 120 and the first line is A, the following relational expression (2) is satisfied. 35°≦A≦55°(2)

[0108] Here, the first straight line 126 refers to a straight line passing through the intersection of the center of the first coil 120 and the center line of the inner hook 130 on the first plane 122 on which the first coil 120 exists.

[0109] Illustratively, the range of the first angle is equal to or greater than 40° and equal to or less than 50°.

[0110] Illustratively, the range of the first angle is equal to or greater than 43° and equal to or less than 47°.

[0111] Illustratively, the first angle is 45°.

[0112] By setting the first angle range between 35° and 55°, the distribution of the positions of the high-heat and low-heat areas formed on the bottom wall of the inner pot by the first coil 120 becomes more rational, thereby making the heating effect of the cookware 100 more uniform and improving the cooking effect.

[0113] In some embodiments of the present application, optionally, the number of the first coils 120 is at least three, and the at least three first coils 120 are spaced apart in the circumferential direction of the inner hook 130, as shown in FIGS. 1, 2, 3, and 4.

[0114] In this embodiment, the cooking utensil 100 is provided with three or more first coils 120, which may be located at the bottom of the inner pot 130, or some of the first coils 120 may be located at the bottom of the inner pot 130 and the rest may be located on the periphery of the inner pot 130, and are provided at intervals around the circumference of the bottom disc 114. Arrow Q in FIG. 1 indicates the circumferential direction of the bottom disc. By providing at least three first coils 120, a relatively large area of ​​the bottom wall of the inner pot can be uniformly covered, improving the heating effect.

[0115] For example, the number of the first coils 120 is three, and the three first coils 120 are arranged in a "Qin" shape at the bottom of the inner pot 130.

[0116] Illustratively, the number of first coils 120 is four, and the four first coils 120 include two sets of first coils 120 arranged opposite each other, and the connecting lines of the first coils 120 of each set arranged opposite each other all pass through the central axis of the first coils 120, and the connecting lines of the two sets of first coils 120 are perpendicular to each other.

[0117] In the embodiment of the present application, at least three first coils 120 are provided, which can uniformly cover a relatively large area of ​​the bottom wall of the inner pot, improving the heating effect, and also allowing the ingredients to move by convection within the inner pot 130, improving the cooking effect.

[0118] In some embodiments of the present application, the first coil 120 is optionally an elliptical coil or a trapezoidal coil, or the first coil 120 is an arc-shaped coil, and the width of the first coil 120 increases from one end of the first coil 120 toward the center point of the first coil 120, and the width of the first coil 120 decreases from the center point of the first coil 120 toward the other end of the first coil 120.

[0119] In this embodiment, illustratively, as shown in FIG. 4A, first coil 120 is an elliptical coil, and the major axis of first coil 120 is the major axis of the ellipse.

[0120] Illustratively, as shown in FIG. 4B, the first coil 120 is a trapezoidal coil, where the trapezoidal coil includes a long side and a short side, and the long axis of the first coil 120 is a straight line passing through the midpoint of the long side and the midpoint of the short side of the trapezoid.

[0121] 4C, the arrow S indicates the circumferential direction of the inner hook, and the first coil 120 is a "crescent" shaped coil, and the width of each first coil 120 in the circumferential direction of the inner hook increases from one side toward the center and then decreases from the center toward the other side, so that the first coil 120 has a shape that is narrow on both sides and wide in the middle. The major axis of the first coil 120 is a straight line that has two intersections with the outermost layer of the conductive wire of the first coil 120 and has the longest distance between the two intersections.

[0122] In the present invention, by providing a non-circular coil, the strong heat area and the weak heat area are formed more rationally in the inner pot, and the distance between the strong heat area and the weak heat area is increased, thereby avoiding the problem of excessive heat concentration.

[0123] In some embodiments of the present application, optionally, the number of first coils 120 is at least two, and the straight-line distance between the first intersection point X1 on one of two adjacent first coils 120 and any point on the other first coil 120 is the longest, or the straight-line distance between the second intersection point X2 on one of two adjacent first coils 120 and any point on the other first coil 120 is the longest.

[0124] In this embodiment, the number of first coils 120 is at least two, and there are two intersections between the long axis of the first coil 120 and its outermost one-turn coil, i.e., the above-mentioned first intersection X1 and second intersection X2, and there is a point at which the distance from any one point on another adjacent first coil 120 is greater than the distance from any other point on the current coil to any one point on the other adjacent first coil 120, i.e., the distance from the adjacent coil is greatest.

[0125] Illustratively, two adjacent first coils 120 include coil 1 and coil 2, and the intersections between the long axis of coil 1 and the outermost one-turn coil of coil 1 are first intersection X1 and second intersection X2, and the distance between first intersection X1 and any one point on coil 2 is the longest.

[0126] For example, two adjacent first coils 120 include coil 1 and coil 2, and the intersections between the long axis of coil 1 and the outermost one-turn coil of coil 1 are first intersection X1 and second intersection X2, and the distance between second intersection X2 and any one point on coil 2 is the longest.

[0127] In the technical solution of this application, the intersection point between the long axis and the outermost turn of the coil is limited to the point where the distance to another adjacent coil is greatest. This means that the end of the long axis of the first coil 120 is away from the strong magnetic field area generated by another first coil 120, the strong heating area is moved to the edge of the bottom wall of the inner pot, and the weak heating area is moved to the central area of ​​the bottom wall of the inner pot. This makes the distribution of the strong heating area location more reasonable, fully utilizes the heat transfer effect from the strong heating area to the weak heating area, and makes the distribution of heating power more uniform.

[0128] In some embodiments of the present application, optionally, the cooking utensil 100 further includes a holder assembly 110 including a body 112 and a bottom disk 114, with a plurality of first winding portions 1142 provided on the bottom disk 114, and with the first coil 120 wound around the first winding portion 1142.

[0129] In this embodiment, the cooking utensil includes a holder assembly 110, which includes a body 112 and a bottom disk 114, and which has a plurality of first windings 1142 wound around a first coil 120, which is a heating coil at the bottom of the cooking utensil 100. Illustratively, a storage cavity is formed inside the holder assembly 110, and the inner pot 130 is located within the storage cavity.

[0130] Illustratively, the number of first coils 120 is equal to the number of first winding sections 1142, i.e., one first coil 120 is wound for each first winding section 1142. Illustratively, the number of first coils 120 is less than the number of first winding sections 1142, i.e., there is at least one free first winding section 1142. Providing more first winding sections 1142 allows cookware to use the same holder assembly 110 regardless of the model or number of heating coils, improving the versatility and general-purpose nature of the holder assembly 110.

[0131] Optionally, in some embodiments of the present application, FIG. 12 shows a structural schematic diagram of a cooking utensil 100 according to some embodiments of the present application. As shown in FIG. 12, the cooking utensil 100 further includes an inner pot 130 including a side wall 132 and a bottom wall 134, with the first coil 120 facing the bottom wall 134, and a second coil 140 provided in the main body 112 and wound around the periphery of the side wall 132.

[0132] In this embodiment, the cooking utensil 100 includes an inner pot 130 and a second coil 140. The inner pot 130 is used to contain food ingredients, such as rice-water mixture. The first coil 120 is a bottom heating coil that faces the bottom wall 134 of the inner pot 130 and is used to heat the inner pot 130 from below. The second coil 140 is wound around the body 112 of the holder assembly 110 and is a side heating coil that is used to heat the inner pot 130 in the circumferential direction of the inner pot 130.

[0133] Illustratively, the total heating power of the at least two first coils 120 is greater than the heating power of the second coil 140 .

[0134] Illustratively, the second coil 140 includes a plurality of single-turn coils spaced apart along the height direction of the inner hook 130.

[0135] In the present embodiment, the provision of both a bottom heating coil and a side heating coil allows the cooking utensil 100 to provide a more uniform heating effect on the inner pot 130 and the food ingredients.

[0136] In some embodiments of the present application, the second coil 140 and the first coil 120 optionally have the same direction of current at adjacent positions.

[0137] In this technical solution, at the same time, the direction of current in at least two first coils 120 is the same, and the direction of current in adjacent positions of the second coil 140 and the first coil 120 is the same. In some embodiments, the second coil 140 and the first coil 120 are both wound clockwise or counterclockwise along the horizontal direction, and in this case, each one-turn coil of the second coil 140 is approximately parallel to the first coil 120. In this case, the direction of current in the bottom one-turn coil of the second coil 140 is the same as the direction of current in any of the first coils 120.

[0138] In some other embodiments, one side of one first coil 120 is curved close to the bottom wall of the inner pot, in which case the curved side of the first coil 120 is located adjacent to the second coil 140, i.e., the direction of the current in the curved portion of the first coil 120 is the same as the direction of the current in the portion of the second coil 140 that is close to the curved portion of the first coil 120.

[0139] By having the same direction of current at adjacent positions of the first coil 120 and the second coil 140, the magnetic fields of the first coil 120 and the second coil 140 can be superimposed and strengthened, thereby improving cooking efficiency.

[0140] In some embodiments of the present application, the second coil 140 optionally includes M layers of sub-coils spaced apart along the height direction of the inner pot, and at least N layers of the M layers of sub-coils are single-turn sub-coils, and N / M≧2 / 5 is satisfied.

[0141] In this embodiment, the present application proposes a heating coil, i.e., the above-mentioned second coil 140, which includes multiple layers of sub-coils spaced apart in the height direction of the inner pot. By providing multiple layers of sub-coils, the second coil 140 can cover and wrap the side wall of the inner pot, thereby heating the inner pot uniformly.

[0142] The number of coil turns is positively correlated with the heating power of the coil. The greater the number of coil turns, the stronger the magnetic field generated, the higher the heating power, and the more likely it is that the heating power will be localized, resulting in heat concentration problems. Due to limitations in the manufacturing process, the coil wire diameter cannot be made small enough. Therefore, to meet the maximum heating power requirements of the cookware and solve the problem of excessive heat concentration in localized areas, the cookware proposed herein is configured such that at least some of the subcoils in the multi-layered second coil 140 are single-turn coils, where a single-turn subcoil means that there is only one turn coil at the same height. Furthermore, the ratio of the number of single-turn coils to the total number of subcoils is set to a specific percentage.

[0143] For example, in the second coil 140, if the coil portion at the same height is one sub-coil and the total number of sub-coils is M, a total of M layers of sub-coils are provided in the height direction of the inner pot. Of the M sub-coils, at least N layers of sub-coils are single-turn sub-coils.

[0144] That is, if the total number of subcoils is M and the number of single-turn subcoils is N, M and N satisfy the relation N / M≧2 / 5.

[0145] In other words, the ratio of the number of single-turn coil layers in the second coil 140 to the total number of layers in the second coil 140 must be 40% or more.

[0146] Illustratively, the second coil 140 includes 100 layers of subcoils, of which 45 layers are single-turn subcoils.

[0147] Illustratively, the second coil 140 includes 100 layers of sub-coils, and all of the 100 layers of sub-coils are single-turn sub-coils.

[0148] In the technical solution of the present application, the heating coil is configured as multiple layers of sub-coils spaced apart in the height direction of the inner pot, and at least 40% of the sub-coils are single-turn coils. This effectively prevents heat from being excessively concentrated in a local area on the side wall of the inner pot, improving the uniformity of heating. When cooking rice, the hardness of the cooked rice can be made uniform and the surface can be made flat, improving the cooking effect of the cookware.

[0149] In some embodiments of the present application, optionally, as shown in FIG. 4D, the inner pot 130 further includes a side wall 132 and a bottom wall 134, the first coil 120 is disposed toward the bottom wall 134, and the projection of the side wall 132 on the first plane 200 on which the first coil 120 exists overlaps with at least a portion of the first coil 120.

[0150] In this embodiment, a portion of the first coil 120 extends from the edge of the bottom wall 134, and the letter B in Fig. 4D represents the distance that the first coil 120 extends from the bottom wall 134. When the first coil 120 is energized, the magnetic field generated by the portion of the first coil 120 extending from the edge of the bottom wall 134 acts on the side wall 132 of the kettle body. Because a second coil is also provided on the side wall 132 of the kettle body, the magnetic field generated by energizing the second coil also acts on the side wall 132 of the kettle body. Therefore, the second coil and the portion of the first coil 120 extending from the edge of the bottom wall 134 collectively heat the side wall 132 of the kettle body, thereby forming an ignition area in the kettle body.

[0151] At least two first coils 120 are provided at the bottom of the kettle body, and two adjacent first coils 120 are provided with a gap therebetween, and a weak heat area is formed in the gap between the two adjacent first coils 120.

[0152] The heat in the kettle body flows from the strong heat area to the weak heat area, so that the heat flows from the outside of the kettle body to the inside of the kettle body, the heat flow area is larger and the path is longer, so that the rice-water mixture in the kettle body is heated evenly and sufficiently, which greatly improves the moisture uniformity of the entire rice in the kettle and improves the texture for the user.

[0153] In some embodiments of the present application, optionally, as shown in FIG. 4E , the inner pot 130 further includes a side wall 132, a bottom wall 134, and a pot opening 136, the first coil 120 is disposed toward the bottom wall 134, the projection of the side wall 132 on the first plane 200 on which the first coil 120 exists overlaps with at least a portion of the first coil 120, and the portion of the first coil 120 that overlaps with the projection of the side wall 132 bends toward the pot opening 136.

[0154] In this embodiment, a portion of the first coil 120 extends from the edge of the bottom wall 134, and the portion of the first coil 120 extending from the edge of the bottom wall 134 bends toward the opening, so that the letter C in FIG. 4E indicates the region of the first coil 120 that extends from the bottom wall 134 and bends upward, and the bent portion of the first coil 120 is covered by the side wall 132 of the kettle body, and the second coil and the bent portion of the first coil 120 can form an ignition area in the kettle body.

[0155] Illustratively, at least two first coils 120 are provided at the bottom of the kettle body, with two adjacent first coils 120 spaced apart, and a weak heat area is formed in the gap between the two adjacent first coils 120.

[0156] The heat in the kettle body flows from the strong heat area to the weak heat area, so that the heat flows from the outside of the kettle body to the inside of the kettle body, the heat flow area is larger and the path is longer, so that the rice-water mixture in the kettle body is heated evenly and sufficiently, which greatly improves the moisture uniformity of the entire rice in the kettle and improves the texture for the user.

[0157] In some embodiments of the present application, optionally, as shown in FIG. 12 , a storage cavity 1122 is defined inside the main body 112, the inner pot 130 is provided in the storage cavity 1122, the holder assembly 110 further includes a second winding portion 1124, the second winding portion 1124 is provided in the main body 112, and the second coil 140 is wound around the second winding portion 1124.

[0158] In this embodiment, the cooking utensil 100 includes a holder assembly 110, and a storage cavity 1122 for storing the inner pot 130 is provided within the body 112 of the holder assembly 110. Illustratively, when the inner pot 130 is placed in a predetermined position within the storage cavity 1122, the holder assembly 110 encloses half of the inner pot 130, and at this time, the peripheral side wall 132 of the holder assembly 110 covers at least half of the area of ​​the side wall 132 of the cover inner pot 130.

[0159] The holder assembly 110 includes a second winding portion 1124 around which the second coil 140 is wound, and exemplarily, the second winding portion 1124 is provided on the body 112 of the holder assembly 110. Exemplarily, the first winding portion 1142 is a multi-layer winding slot, and the multi-layer winding slot is evenly distributed in the height direction of the inner pot 130.

[0160] In the present application, the provision of second winding portion 1124 around which second coil 140 is wound reduces the difficulty of assembling cooking utensil 100 during production and assembly, and helps improve production efficiency.

[0161] 3, the inner hook 130 further includes a hook opening 136, and the side wall 132 includes a first wall section 1322 and a second wall section 1324. A first end of the first wall section 1322 forms the hook opening 136, a second end of the first wall section 1322 is connected to a first end of the second wall section 1324, and a second end of the second wall section 1324 is connected to the bottom wall 134. The inner diameter of the second wall section 1324 decreases from the hook opening 136 toward the bottom wall 134. Arrow K in FIG. 4E indicates the height direction of the inner hook.

[0162] In this embodiment, the inner hook 130 is a "spherical hook," and in the height direction of the inner hook 130, the inner hook 130 includes a hook opening 136, a side wall 132, and a bottom wall 134, in this order, where the side wall 132 of the inner hook 130 is divided into a first wall section 1322 and a second wall section 1324, the first wall section 1322 being the wall section closer to the hook opening 136, and the second wall section 1324 being the wall section closer to the bottom wall 134. Illustratively, the junction between the first wall section 1322 and the second wall section 1324 is the position where the inner diameter of the inner hook 130 is largest.

[0163] Because the area of ​​the bottom wall 134 is smaller than the area of ​​the kettle opening 136, the second wall section 1324 is a hemispherical wall section that transitions inward, i.e., the inner diameter of the second wall section 1324 decreases from the kettle opening 136 toward the bottom wall 134.

[0164] Illustratively, the first wall section 1322 is a cylindrical wall section.

[0165] Illustratively, the first wall section 1322 is a hemispherical wall section, and the inner diameter of the first wall section 1322 decreases from the bottom wall 134 toward the kettle opening 136 .

[0166] Illustratively, the area of ​​the kettle opening 136 is equal to or greater than the area of ​​the bottom wall 134 .

[0167] In the embodiment of the present application, a "spherical pot" type inner pot 130 is provided, which reduces the area of ​​the bottom wall 134 and promotes the formation of convection between high and low temperatures within the inner pot 130, thereby stirring the rice and water within the pot and improving the cooking effect.

[0168] In some embodiments of the present application, as shown in FIG. 3, the second coil 140 optionally includes a plurality of sub-coils distributed in the height direction of the inner pot 130, and the plurality of sub-coils include a first sub-coil 142 wound around the first wall section 1322 and a second sub-coil 144 wound around the second wall section 1324, and the diameter of the first sub-coil 142 is equal to or greater than the diameter of the second sub-coil 144.

[0169] In this embodiment, the first wall section 1322 is a cylindrical wall section, i.e., the first wall section 1322 has a hollow cylindrical structure. The second wall section 1324 is a hemispherical wall section, and the second wall section 1324 converges inward from the hook opening 136 toward the bottom wall 134, so that the inner diameter of the second wall section 1324 becomes smaller as it approaches the bottom wall 134. Illustratively, the second wall section 1324 is defined as the R portion of the inner hook 130.

[0170] In the height direction of the inner pot 130, the second coil 140 includes multiple layers of sub-coils, and illustratively, each layer of sub-coils is a single-turn coil.

[0171] Here, if the subcoil wound around the first wall section 1322 is defined as the first subcoil 142 and the subcoil wound around the second wall section 1324 is defined as the second subcoil 144, the diameter of the first subcoil 142 is equal to or greater than the diameter of the second subcoil 144. That is, as the side wall 132 of the inner pot 130 tends to move inward along the curved portion of the inner pot 130, the second subcoil 144 also moves inward. This avoids the problem of the second coil 140, which is located at the second wall section 1324, i.e., the curved portion of the inner pot, being too far away from the side wall 132 of the inner pot 130, wasting energy, and improves the heating efficiency of the cooking utensil 100.

[0172] Optionally, in some embodiments of the present application, FIG. 13 shows a structural schematic diagram of a base 150 of some embodiments of the present application, and as shown in FIG. 13, the cooking utensil 100 further includes a base 150 including a mounting post 152, and the holder assembly 110 further includes a mounting portion 116, to which the mounting post 152 is connected.

[0173] In this embodiment, the cooking utensil 100 includes a base 150, and the holder assembly 110 is attached to the base 150. Here, the base 150 is provided with mounting posts 152, and illustratively the number of mounting posts 152 is at least two. The holder assembly is provided with mounting portions 116 corresponding to the mounting posts 152, and illustratively the top of the mounting posts 152 includes a screw hole, and the mounting portions 116 include a through-hole. During assembly, a bolt is inserted through the through-hole of the mounting portion 116 and then screwed into the screw hole of the mounting post 152, thereby fixing the holder assembly 110 to the base 150.

[0174] Illustratively, when the mounting portion 116 and the mounting post 152 are connected and attached together, a gap remains between the holder assembly 110 and the body 112 of the base 150, thereby preventing the bottom coil from contacting the structure of the base 150 and leaving space for the bottom coil to dissipate heat.

[0175] In the present embodiment, the base 150 and the holder assembly 110 are connected by the mounting posts 152, which is advantageous in that it is easy to assemble and provides sufficient space for mounting and dissipating heat from the coil assembly, thereby reducing the complexity of the process of assembling the cooking utensil 100.

[0176] In some embodiments of the present application, optionally, as shown in FIG. 12, cooking utensil 100 further includes a housing 160 connected to base 150 and having holder assembly 110 positioned therein, and a lid 170 openably connected to housing 160.

[0177] In this embodiment, the cooking utensil 100 further includes a housing 160 and a lid 170. The housing 160 is connected to the base 150, and the housing 160 and the base 150 define an attachment cavity, and the holder assembly 110 is disposed within the attachment cavity. The lid 170 is openably connected to the top of the housing 160. When the lid 170 is in an open position, the opening of the storage cavity 1122 is exposed, allowing a user to insert or remove the inner pot 130. When the lid 170 is in a closed position, the opening of the storage cavity 1122 is covered by the lid 170, and the inner pot 130 is sealed even when it is in a preset position within the storage cavity 1122.

[0178] In the present embodiment, the housing 160 and the lid 170 form the exposed surfaces of the cookware 100, thereby encasing the internal elements of the cookware 100 and improving the reliability and appearance of the cookware 100.

[0179] In the description of this application, the term "plurality" means two or more, and unless otherwise expressly limited, the orientation or positional relationship indicated by terms such as "upper" and "lower" is based on the orientation or positional relationship shown in the drawings and is intended solely to facilitate and simplify the description of this application. It does not indicate or imply that the indicated devices or elements must have a particular orientation or be configured or operate in a particular orientation, and therefore should not be understood as limiting this application. Terms such as "connect," "attach," and "fixed" should all be understood broadly. For example, "connected" may mean a fixed connection, a detachable connection, or an integral connection. It may also mean a direct connection or an indirect connection via an intermediate medium. The specific meanings of the above terms in this application can be understood by those skilled in the art depending on the context.

[0180] In the description of this application, the use of terms such as "one embodiment," "some embodiments," or "specific embodiment" means that a particular feature, structure, material, or characteristic described with reference to that embodiment or example is included in at least one embodiment or example of this application. In this application, general references to the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0181] The above description is merely a preferred embodiment of the present application, and does not limit the present application. Those skilled in the art can make various modifications and changes to the present application. Any modifications, equivalent replacements, improvements, etc. made without departing from the spirit and principles of the present application shall be included in the protection scope of the present application. [Explanation of symbols]

[0182] The correspondence between the reference numerals and the part names in FIGS. 1 to 13 is as follows: 100 Cookware 110 Holder assembly 112 Main Unit 1122 Storage cavity 1124 Second winding section 114 Bottom Disc 1142 First winding section 116 Mounting part 120 First Coil 122 1st plane 124 Long axis 126 1st straight line 130 Inner pot 132 Side wall 1322 1st wall step 1324 2nd wall step 134 Bottom Wall 136 Kettle Opening 140 Second coil 142 First subcoil 144 Second subcoil 150 base 152 Mounting pillar 160 Housing 170 Lid 200 1st plane

Claims

1. an inner pot having a center line; a first coil wound around the inner pot and configured to generate a magnetic field when current is applied, the number of the first coils being at least two, the magnetic fields generated by the at least two first coils having the same polarity, the first coil including a major axis, and an angle between the major axis and a first line in a first plane on which the first coil exists satisfying a first angle; the major axis and the outermost turn of the first coil have a first intersection point and a second intersection point, the distance between the first intersection point and the second intersection point is equal to or greater than the distance between any other two points on the first coil, the first line is a line passing through the center of the first coil and a first center point, and the first center point is an intersection point between the center line of the inner hook and the first plane; A cooking utensil characterized by:

2. The first angle range is greater than 0° and less than or equal to 90°.

2. The cooking device of claim 1.

3. The first angle ranges from 35° to 55°.

2. The cooking device of claim 1.

4. The number of the first coils is at least three, and the at least three first coils are provided at intervals in the circumferential direction of the inner hook.

2. The cooking device of claim 1.

5. the first coil is an elliptical coil or a trapezoidal coil; or The first coil is an arc-shaped coil, and the width of the first coil increases from one end of the first coil toward the center point of the first coil, and decreases from the center point of the first coil toward the other end of the first coil.

2. The cooking device of claim 1.

6. the number of the first coils is at least two, and the linear distance between the first intersection point on one of the first coils and any one point on the other of the two adjacent first coils is the largest; Alternatively, the linear distance between the second intersection point on one of the first coils and any one point on the other first coil is the largest among two adjacent first coils.

2. The cooking device of claim 1.

7. the holder assembly further includes a body and a bottom disk, the bottom disk being provided with a plurality of first winding portions, and the first coil being wound around the first winding portions; The cooking device according to any one of claims 1 to 6.

8. The inner pot includes a side wall, and the cooking utensil includes: a second coil provided on the main body and wound around the periphery of the side wall; 8. The cooking device according to claim 7.

9. The second coil and the first coil have the same direction of current at adjacent positions.

9. The cooking device of claim 8.

10. The second coil includes M layers of sub-coils spaced apart along the height direction of the inner hook, and at least N layers of the M layers of sub-coils are single-turn sub-coils, and N / M≧2 / 5 is satisfied.

9. The cooking device of claim 8.

11. The inner pot further includes a side wall and a bottom wall, the first coil is disposed facing the bottom wall, and a projection of the side wall on a first plane on which the first coil exists overlaps with at least a portion of the first coil. The cooking device according to any one of claims 1 to 6.

12. The inner pot further includes a side wall, a bottom wall, and a pot opening, the first coil is disposed toward the bottom wall, a projection of the side wall on a first plane on which the first coil exists overlaps with at least a portion of the first coil, and the portion of the first coil that overlaps with the projection of the side wall bends toward the pot opening. The cooking device according to any one of claims 1 to 6.

13. The inner kettle further includes a bottom wall and a kettle opening, and the side wall includes a first wall section and a second wall section, a first end of the first wall section forms the kettle opening, a second end of the first wall section is connected to a first end of the second wall section, and a second end of the second wall section is connected to the bottom wall, and an inner diameter of the second wall section decreases from the kettle opening toward the bottom wall.

9. The cooking device of claim 8.

14. The second coil includes a plurality of sub-coils distributed along the height direction of the inner pot, the plurality of sub-coils including a first sub-coil wound around the first wall section and a second sub-coil wound around the second wall section, and the diameter of the first sub-coil is equal to or greater than the diameter of the second sub-coil.

14. The cooking device of claim 13.

15. a base including a mounting post; the holder assembly further includes a mounting portion, the mounting portion being connected to the mounting post; 8. The cooking device according to claim 7.

16. a housing connected to the base, the housing having the holder assembly located therein; A cover body that is openably and closably connected to the housing, 16. The cooking device of claim 15.

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