Cooking equipment

Abstract

The utility model provides cooking equipment, and relates to the technical field of electromagnetic heating. The cooking equipment comprises an inner pot, an outer pot, an inner pot cover and an outer pot cover, the first coils are wound on the inner pot, the first coils are configured to generate magnetic fields when being electrified, the polarities of the magnetic fields generated by the at least two first coils are the same, each first coil comprises a long axis, and on a first plane where the first coils are located, the angle of an included angle between the long axis and a first straight line meets a first angle; wherein a first intersection point and a second intersection point are formed between the long axis and the wire turn on the outermost side of the first coil, the distance between the first intersection point and the second intersection point is larger than or equal to the distance between any other two points on the first coil, and the first straight line is a straight line passing through the center of the first coil and the first center point; the first center point is the intersection point of the center line of the inner pot and the first plane. Cooked rice is more uniform in hardness and smoother in surface, so that the heating effect is improved.

Description

Technical Field

[0001] The present application relates to the technical field of electromagnetic heating, and in particular to a cooking device. Background Art

[0002] In the related art, electromagnetic heating cooking equipment 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 the traditional heating method.

[0003] Since the coil disk is concentrated at the bottom of the pot, it is easy to form a strong magnetic area on the bottom of the pot. The heating power in the strong magnetic area will be more concentrated, resulting in uneven softness and hardness of the cooked rice and uneven surface, which affects the heating effect. Utility Model Content

[0004] The present application aims to solve at least one of the technical problems existing in the prior art or related art.

[0005] To this end, the present application proposes a cooking device.

[0006] In view of this, the present application provides a cooking device, including: an inner pot, the inner pot having a center line; a first coil, the first coil is wound around the inner pot, the first coil is configured to generate a magnetic field when energized, the number of the first coils is at least two, the magnetic fields generated by at least two first coils have the same polarity, the first coil includes a long axis, and on a first plane where the first coil is located, the angle between the long axis and a first straight line satisfies a first angle; wherein the long axis and the outermost turns of the first coil have a first intersection and a second intersection, and the distance between the first intersection and the second intersection is greater than or equal to the distance between any other two points on the first coil, the first straight line is a straight line passing through the center of the first coil and the first center point, and the first center point is the intersection of the center line of the inner pot and the first plane.

[0007] In the technical solution, the cooking device includes, but is not limited to, an electric rice cooker, an electric soup cooker, and an electric pressure cooker. The cooking device includes an inner pot, and the first coil is wound around the outer side of the inner pot. The inner pot has a center line. Exemplarily, when the inner pot is a spherical pot or a cylindrical inner pot, the center line of the inner pot is the axis. Exemplarily, when the inner pot is a square inner pot or an inner pot of other shapes, the center line of the inner pot is a straight line passing through the center point of the inner pot mouth and the center point of the inner pot bottom wall.

[0008] For example, after being powered on, the first coil can generate a continuously alternating electromagnetic field. This continuously alternating electromagnetic field continuously cuts the metal pot, and can generate eddy currents in the metal side walls of the inner pot. When the overcurrent flows through the metal pot, Joule heat is generated, thereby heating and cooking the ingredients in the pot, such as rice and water.

[0009] The number of the first coils is at least two, and the at least two first coils are arranged at intervals. Exemplarily, the first coils face the bottom wall of the inner pot, and the at least two first coils are arranged at intervals in the circumferential direction of the bottom wall of the inner pot.

[0010] Due to the effect of magnetic field superposition, a strong magnetic field area is formed in the area where the magnetic field is superimposed between at least two first coils, and the location where the strong magnetic field area intersects with the inner pot is the strong heat area. Due to the heat transfer effect of the inner pot itself, the heat energy of the strong heat area is transferred to the weak heat area.

[0011] The polarity of the magnetic field generated by at least two first coils at the same time is the same. Exemplarily, at least two first coils are connected in series, and the winding direction of at least two first coils is the same, so at the same time, the current direction in at least two first coils is the same, so that the polarity of the magnetic field generated by at least two first coils at the same time is the same, which will form a region with weakened magnetic field between two adjacent first coils, and this region will form a weak heat area on the inner pot, and a strong heat area opposite to the weak heat area.

[0012] On this basis, the present application sets the bottom heating coil, that is, the first coil as a non-standard circular coil, and sets the long axis of the first coil to have an angle with the straight line passing through the center of the first coil and the first center point, wherein the long axis of the first coil is the straight line passing through the maximum width (or length) of the first coil. Exemplarily, among all the straight lines that have two intersections with the outermost turn of the first coil, the distance between the two intersections of the long axis of the first coil and the outermost turn of the coil, that is, the first intersection and the second intersection mentioned above, is the largest.

[0013] The first center point is defined as the intersection of the center line of the inner pot and the first plane where the first coil is located, so the long axis of the first coil does not point to the first center point, but exists at a first angle.

[0014] This makes the end pointed by the long axis of the first coil away from the strong magnetic field area generated by the other first coil. As a result, the distance between the strong heat areas generated on the inner pot becomes farther, that is, the distance from the strong heat area to the weak heat area is lengthened, so that the strong heat area moves toward the edge of the bottom wall of the inner pot, and the weak heat area moves toward the central area of ​​the bottom wall of the inner pot, so that the position distribution of the strong heat areas is more reasonable, and the heat transfer effect from the strong heat area to the weak heat area can be fully utilized, so that the heating power distribution is more even, and the problem of excessive heat concentration in some areas is avoided. The rice water inside the cooking equipment is heated more evenly, and the cooked rice is more evenly soft and hard, and the surface is smoother, thereby improving the heating effect.

[0015] In addition, the cooking device in the above technical solution provided by the present application may also have the following additional technical features:

[0016] 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°.

[0017] In this technical solution, assuming that the angle between the major axis of the first coil and the first straight line is A, the following relationship (1) is satisfied:

[0018] 0°<A≤90°. (1)

[0019] Among them, A is the above-mentioned first angle, and the above-mentioned first straight line is a straight line on the first plane where the first coil is located, passing through the intersection of the center of the first coil and the center line of the inner pot on the first plane.

[0020] By setting the first angle to be between 0° and 90°, it can be ensured that the position distribution of the high heat area and the low heat area formed by the first coil on the bottom wall of the inner pot is more reasonable, thereby making the heating effect of the cooking equipment more uniform and improving the cooking effect.

[0021] In some technical solutions of the present application, optionally, the range of the first angle is: greater than or equal to 35° and less than or equal to 55°.

[0022] In this technical solution, assuming that the angle between the major axis of the first coil and the first straight line is A, the following relationship (2) is satisfied:

[0023] 35°≤A≤55°. (2)

[0024] The first straight line is a straight line on the first plane where the first coil is located, passing through the intersection of the center of the first coil and the center line of the inner pot on the first plane.

[0025] Exemplarily, the range of the first angle is greater than or equal to 40° and less than or equal to 50°.

[0026] Exemplarily, the range of the first angle is greater than or equal to 43° and less than or equal to 47°.

[0027] Exemplarily, the first angle is 45°.

[0028] By setting the first angle to be between 35° and 55°, it can be ensured that the position distribution of the high heat area and the low heat area formed by the first coil on the bottom wall of the inner pot is more reasonable, thereby making the heating effect of the cooking equipment more uniform and improving the cooking effect.

[0029] In some technical solutions of the present application, optionally, the number of the first coils is at least 3, and the at least 3 first coils are arranged at intervals in the circumferential direction of the inner pot.

[0030] In this technical solution, the cooking device is provided with at least two first coils, and the number of the first coils is three or more. The first coils can be located at the bottom of the inner pot, or a part of them can be located at the bottom of the inner pot and the other part can be located on the circumferential side of the inner pot. By setting at least three first coils, it is possible to achieve uniform coverage of a relatively large area of the bottom wall of the inner pot and improve the heating effect.

[0031] Exemplarily, the number of the first coils is three, and the three first coils are arranged in a "pin" shape at the bottom of the inner pot.

[0032] Exemplarily, the number of the first coils is four. Among the four first coils, there are two groups of first coils arranged oppositely. The connection line of each group of oppositely arranged first coils passes through the central axis of the first coil, and the connection lines of the two groups of first coils are perpendicular to each other.

[0033] The technical solution of the present application can achieve uniform coverage of a relatively large area of the bottom wall of the inner pot and improve the heating effect by setting at least three first coils. At the same time, it enables the food materials to convect in the inner pot, improving the cooking effect.

[0034] In some technical solutions of the present application, optionally, the first coil is an oval coil or a trapezoidal coil; or the first coil is an arc-shaped coil. From one end of the first coil to the center point of the first coil, the width of the first coil increases, and from the center point of the first coil to the other end of the first coil, the width of the first coil decreases.

[0035] In this technical solution, exemplarily, the first coil is an oval coil, and the major axis of the first coil is the major axis of the oval.

[0036] Exemplarily, the first coil is a trapezoidal coil. Among them, the trapezoidal coil includes a long side and a short side, and the major axis of the first coil is a straight line passing through the midpoints of the long side and the short side of the trapezoid.

[0037] Exemplarily, the first coil is a "crescent" - shaped coil. In the circumferential direction of the inner pot, the width of each first coil gradually becomes wider from one side to the center direction, and then gradually becomes narrower from the center to the other side direction, so that the first coil presents 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 wires of the first coil, and the distance between the two intersections is the farthest.

[0038] The present application can more reasonably form a heat - strong area and a heat - weak area on the inner pot by setting non - circular coils, promoting an increase in the distance between the heat - strong area and the heat - weak area, thereby avoiding the problem of excessive heat concentration.

[0039] In some technical solutions of the present application, optionally, the number of first coils is at least two, and the straight-line distance between a first intersection point on one of two adjacent first coils and any point on the other first coil is the largest; or, the straight-line distance between a second intersection point on one of two adjacent first coils and any point on the other first coil is the largest.

[0040] In this technical solution, the number of first coils is at least two, and there are two intersections between the long axis of the first coil and its outermost turn, namely the first intersection and the second intersection. There is a point among the first intersection and the second intersection, such that the distance between the point and any point on another adjacent first coil is greater than the distance between other points of the current coil and any point on another adjacent first coil, namely, the distance between the point and the adjacent coil is the maximum.

[0041] Exemplarily, two adjacent first coils include coil 1 and coil 2, the intersection of the long axis of coil 1 and the outermost turn of coil 1 is the first intersection and the second intersection, and the distance between the first intersection and any point on coil 2 is the largest.

[0042] Exemplarily, two adjacent first coils include coil 1 and coil 2, the intersection of the long axis of coil 1 and the outermost turn of coil 1 is the first intersection and the second intersection, and the distance between the second intersection and any point on coil 2 is the largest.

[0043] The technical solution of the present application limits an intersection point of the long axis and the outermost turn of the coil, which is farthest from another adjacent coil, so that the end pointed by the long axis of the first coil is away from the strong magnetic field area generated by the other first coil, so that the strong heat area moves toward the edge of the bottom wall of the inner pot, and the weak heat area moves toward the central area of ​​the bottom wall of the inner pot, so that the position distribution of the strong heat area is more reasonable, and the heat transfer effect from the strong heat area to the weak heat area can be fully utilized, so that the heating power distribution is more uniform.

[0044] In some technical solutions of the present application, optionally, the cooking device further includes: a bracket assembly, the bracket assembly includes a main body and a chassis, a plurality of first winding parts are arranged on the chassis, and the first coil is wound around the first winding parts.

[0045] In the technical solution, the cooking device includes a support assembly, the support assembly includes a body and a chassis, wherein a plurality of first winding parts are provided on the chassis, the first winding parts are used to wind a first coil, and the first coil is a bottom heating coil of the cooking device. Exemplarily, a receiving cavity is formed in the support assembly, and the inner pot is located in the receiving cavity.

[0046] Exemplarily, the number of first coils is equal to the number of first winding parts, that is, one first coil is wound on each first winding part. Exemplarily, the number of first coils is less than the number of first winding parts, that is, there is at least one empty first winding part. By providing more first winding parts, cooking devices of different models and different numbers of heating coils can use the same bracket assembly, thereby improving the versatility and universality of the bracket assembly.

[0047] In some technical solutions of the present application, optionally, the cooking device also includes: an inner pot, the inner pot includes a side wall and a bottom wall, and the first coil is arranged toward the bottom wall; a second coil, the second coil is arranged on the main body, and the second coil is wound around the side of the side wall.

[0048] In the technical solution, the cooking device includes an inner pot and a second coil, the inner pot is used to hold food, such as a rice-water mixture, etc. 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 inner pot. The second coil is wound on the body of the bracket assembly, the second coil is a side heating coil, and is used to heat the inner pot from the circumference of the inner pot.

[0049] Exemplarily, the total heating power of the at least two first coils is greater than the heating power of the second coil.

[0050] Exemplarily, the second coil includes a plurality of single-turn coils spaced apart along the height direction of the inner pot.

[0051] The technical solution of the present application provides a bottom heating coil and a side heating coil at the same time, so that the cooking device can heat the inner pot and the food more evenly.

[0052] In some technical solutions of the present application, optionally, the current directions of the second coil and the adjacent positions of the first coil are the same.

[0053] In this technical solution, at the same time, the current direction in at least two first coils is the same, and the current direction of the second coil adjacent to the first coil is the same. In some embodiments, the second coil and the first coil are both wound clockwise or counterclockwise in the horizontal direction, and each coil turn in the second coil is approximately parallel to the first coil. In this case, the current direction of the bottommost coil turn in the second coil is the same as the current direction of each first coil.

[0054] In other embodiments, one side of a first coil is tilted toward the direction close to the bottom wall of the inner pot. At this time, the tilted side of the first coil is formed to be adjacent to the second coil, that is, the current direction of the tilted part of the first coil is the same as the current direction of the tilted part of the second coil close to the first coil.

[0055] By setting the current directions of the adjacent positions of the first coil and the second coil to be the same, the magnetic fields of the first coil and the second coil can be superimposed and strengthened, thereby improving the cooking efficiency.

[0056] 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 sub-coils among the M layers of sub-coils are single-turn sub-coils, satisfying N / M≥2 / 5.

[0057] In this technical solution, the present application proposes a heating coil, namely the above-mentioned second coil, which includes multiple layers of sub-coils arranged at intervals in the height direction of the inner pot. By arranging multiple layers of sub-coils, the second coil can cover and wrap the side wall of the inner pot, thereby achieving uniform heating of the inner pot.

[0058] The number of coil turns is positively correlated with the heating power of the coil. The more coil turns there are, the stronger the magnetic field generated is, the higher the heating power is, and the more likely it is to cause the problem of heat concentration caused by the local concentration of heating power. However, due to the limitation of processing technology, the wire diameter of the coil cannot be small enough. Therefore, in order to meet the maximum heating power of the cooking device and avoid the problem of excessive concentration of heat in the local area, in the cooking device proposed in this application, the multi-layer sub-coils of the second coil are set, including at least some sub-coils as single-turn coils, wherein the single-turn sub-coil has only one turn at the same height, and the proportion of the number of single-turn coils in all sub-coils meets a specific proportion.

[0059] For example, it is assumed that in the second coil, the coil parts with the same height are set as a sub-coil, and the total number of sub-coils is M, that is, a total of M layers of sub-coils are set in the height direction of the inner pot. Among the M sub-coils on the M side, at least N layers of sub-coils are single-turn sub-coils.

[0060] That is, the total number of sub-coils is M, the number of single-turn sub-coils is N, and M and N satisfy the following relationship: N / M≥2 / 5.

[0061] That is to say, the proportion of the number of layers of the second coil that are single-turn coils to the total number of layers of the second coil is greater than or equal to 40%.

[0062] Exemplarily, the second coil includes 100 layers of sub-coils, among which 45 layers of single-turn sub-coils are arranged.

[0063] Exemplarily, the second coil includes 100 layers of sub-coils, and all of the 100 layers of sub-coils are single-turn sub-coils.

[0064] The technical solution of the present application is to arrange the heating coil as a plurality of sub-coils spaced apart in the height direction of the inner pot, wherein at least 40% of the sub-coils are single-turn coils, thereby effectively preventing excessive concentration of heat in a local area of ​​the side wall of the inner pot, thereby improving the uniformity of heating. When cooking rice, the cooked rice can be made uniform in hardness and softness and have a smooth surface, thereby improving the cooking effect of the cooking equipment.

[0065] 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 arranged toward the bottom wall, and the projection of the side wall on the first plane where the first coil is located overlaps with at least part of the first coil.

[0066] In this technical solution, a portion of the first coil extends out of the edge of the bottom wall. When the first coil is energized, the magnetic field generated by the portion of the first coil extending out of the edge of the bottom wall will act on the side wall of the pot body. Since the side wall of the pot body is also provided with a second coil, the magnetic field generated by the second coil when energized will also act on the side wall of the pot body. Therefore, the second coil and the portion of the first coil extending out of the edge of the bottom wall will jointly heat the side wall of the pot body, thereby forming a strong hot area on the pot body.

[0067] At least two first coils are arranged at the bottom of the pot body, and two adjacent first coils are arranged at intervals, and a weak heat zone is formed at the gap position between the two adjacent first coils.

[0068] The heat on the pot body will flow from the strong heat area to the weak heat area, so that the heat will flow from the outside of the pot body to the inside of the pot body, making the heat flow area larger and the path longer, so that the rice and water mixture in the pot body can be evenly and fully heated, thereby greatly improving the uniformity of the moisture of the whole pot of rice and improving the user's taste.

[0069] In some technical solutions of the present application, optionally, the inner pot also includes a side wall, a bottom wall and a pot mouth, the first coil is arranged toward the bottom wall, the projection of the side wall on the first plane where the first coil is located overlaps with at least part of the first coil, and the part of the first coil overlapping with the projection of the side wall is bent toward the pot mouth.

[0070] In this technical solution, a portion of the first coil extends out of the edge of the bottom wall, and the portion of the first coil extending out of the edge of the bottom wall is bent toward the opening, so that the bent portion of the first coil covers the side wall of the pot body, and the second coil and the bent portion can form a strong heat zone on the pot body.

[0071] Exemplarily, at least two first coils are arranged at the bottom of the pot body, and two adjacent first coils are arranged at intervals, and a weak heat zone is formed in the gap between the two adjacent first coils.

[0072] The heat on the pot body will flow from the strong heat area to the weak heat area, so that the heat will flow from the outside of the pot body to the inside of the pot body, making the heat flow area larger and the path longer, so that the rice and water mixture in the pot body can be evenly and fully heated, thereby greatly improving the uniformity of the moisture of the whole pot of rice and improving the user's taste.

[0073] In some technical solutions of the present application, optionally, the inner pot also includes a pot mouth, the side wall includes a first wall segment and a second wall segment, the first end of the first wall segment forms the pot mouth, the second end of the first wall segment is connected to the first end of the second wall segment, the second segment of the second wall segment is connected to the bottom wall, and the inner diameter of the second wall segment decreases in the direction from the pot mouth to the bottom wall.

[0074] In this technical solution, the inner pot is a "spherical pot". In the height direction of the inner pot, the inner pot includes a pot mouth, a side wall and a bottom wall in sequence, wherein the side wall of the inner pot is divided into a first wall section and a second wall section, the first wall section is a wall section close to the pot mouth, and the second wall section is a wall section close to the bottom wall. Exemplarily, the intersection of the first wall section and the second wall section is the position where the inner diameter of the inner pot is the largest.

[0075] Since the area of ​​the bottom wall is smaller than the area of ​​the pot mouth, the second wall section is a hemispherical wall section that is excessively contracted inwards, that is, the inner diameter of the second wall section decreases in the direction from the pot mouth to the bottom wall.

[0076] Exemplarily, the first wall segment is a cylindrical wall segment.

[0077] Exemplarily, the first wall segment is a hemispherical wall segment, and the inner diameter of the first wall segment decreases in the direction from the bottom wall to the pot mouth.

[0078] Exemplarily, the area of ​​the pot mouth is greater than or equal to the area of ​​the bottom wall.

[0079] The technical solution of the present application provides a "spherical kettle" type inner pot, which can promote the formation of hot and cold convection in the inner pot by reducing the bottom wall area, thereby driving the stirring of the rice and water in the pot and improving the cooking effect.

[0080] 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, the plurality of sub-coils include a first sub-coil wound around the first wall segment, and a second sub-coil wound around the second wall segment, and the diameter of the first sub-coil is greater than or equal to the diameter of the second sub-coil.

[0081] In this technical solution, the first wall segment is a cylindrical wall segment, that is, the first wall segment is a hollow cylindrical structure. The second wall segment is a hemispherical wall segment, and in the direction from the pot mouth to the bottom wall, the second wall segment gradually converges inward, so that the closer to the bottom wall, the smaller the inner diameter. Exemplarily, the second wall segment is defined as the R portion of the inner pot.

[0082] In the height direction of the inner pot, the second coil includes multiple layers of sub-coils. Exemplarily, each layer of sub-coils is a single-turn coil.

[0083] Among them, the sub-coil wound on the first wall segment is defined as the first sub-coil, and the sub-coil wound on the second wall segment is defined as the second sub-coil, then the diameter of the first sub-coil is greater than or equal to the diameter of the second sub-coil, that is, along the R portion of the inner pot, the second sub-coil also converges inward as the side wall of the inner pot converges inward, thereby avoiding the problem of the second coil arranged on the second wall segment, that is, the R portion of the inner pot, being too far away from the side wall of the inner pot, causing energy waste, and can improve the heating efficiency of the cooking equipment.

[0084] In some technical solutions of the present application, optionally, the cooking device further includes: a base, the base includes a mounting column; wherein the bracket assembly further includes a mounting portion, and the mounting portion is used to connect the mounting column.

[0085] In the technical solution, the cooking device includes a base, and the bracket assembly is mounted on the base. The base is provided with mounting columns, and exemplarily, the number of mounting columns is at least 2. The bracket assembly is provided with a mounting portion corresponding to the mounting column, and exemplarily, the top of the mounting column includes a screw hole, and the mounting portion includes a through hole. During assembly, a bolt is passed through the through hole of the mounting portion and then screwed to the screw hole of the mounting column, thereby fixing the bracket assembly on the base.

[0086] Exemplarily, when the mounting portion is connected and mounted with the mounting column, a gap is left between the bracket assembly and the body of the base, thereby preventing the bottom coil from contacting the base and reserving heat dissipation space for the bottom coil.

[0087] The technical solution of the present application connects the base and the bracket assembly through the installation column, which is easy to assemble and can reserve sufficient installation and heat dissipation space for the coil assembly, which is conducive to reducing the complexity of the assembly process of the cooking equipment.

[0088] In some technical solutions of the present application, optionally, the cooking device further includes: a shell body, the shell body is connected to the base, and the bracket assembly is located inside the shell body; and a cover body, the cover body is connected to the shell body in an openable and closable manner.

[0089] In this technical solution, the cooking device includes a shell and a cover. The shell is connected to the base. The shell and the base enclose a mounting cavity, and the bracket assembly is arranged in the mounting cavity. The cover can be connected to the top of the shell in an openable and closable manner. When the cover is in an open state, the opening of the accommodating cavity is exposed, and the user can take the inner pot in. When the cover is in a closed state, the opening of the accommodating cavity is covered by the cover. At this time, if the inner pot is in a preset position of the accommodating cavity, the inner pot is also in a closed state.

[0090] The embodiment of the present application forms an exposed surface of the cooking device by providing a shell and a cover, which can wrap the internal components of the cooking device and improve the reliability and aesthetics of the cooking device. BRIEF DESCRIPTION OF THE DRAWINGS

[0091] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0092] Figure 1 A schematic diagram showing the structure of a cooking device in some embodiments of the present application;

[0093] Figure 2 A schematic diagram showing the structure of a cooking device in some embodiments of the present application;

[0094] Figure 3 A schematic diagram showing the structure of a cooking device in some embodiments of the present application;

[0095] Figure 4A A schematic diagram showing the structure of a cooking device in some embodiments of the present application;

[0096] Figure 4B A schematic diagram showing the structure of a cooking device in some embodiments of the present application;

[0097] Figure 4C A schematic diagram showing the structure of a cooking device in some embodiments of the present application;

[0098] Figure 4D A schematic diagram showing the structure of a cooking device in some embodiments of the present application;

[0099] Figure 4E A schematic diagram showing the structure of a cooking device in some embodiments of the present application;

[0100] Figure 5 A schematic diagram of the thermal field of the inner pot of some embodiments of the present application is shown;

[0101] Figure 6 A schematic diagram of the thermal field of the inner pot of some embodiments of the present application is shown;

[0102] Figure 7 A schematic diagram of the thermal field of the inner pot of some embodiments of the present application is shown;

[0103] Figure 8 A schematic diagram of the thermal field of the inner pot of some embodiments of the present application is shown;

[0104] Fig. 9 A schematic diagram showing the structure of a cooking device in some embodiments of the present application;

[0105] Fig.10A schematic diagram of the thermal field of the inner pot of some embodiments of the present application is shown;

[0106] Fig.11 A schematic diagram showing the structure of a cooking device in some embodiments of the present application;

[0107] Fig.12 A schematic diagram showing the structure of a cooking device in some embodiments of the present application;

[0108] Fig.13 A schematic structural diagram of a base according to some embodiments of the present application is shown.

[0109] in, Figures 1 to 13 The corresponding relationship between the reference numerals and component names in the figure is:

[0110] 100 cooking device, 110 bracket assembly, 112 main body, 1122 accommodating cavity, 1124 second winding part, 114 chassis, 1142 first winding part, 116 mounting part, 120 first coil, 122 first plane, 124 long axis, 126 first straight line, 130 inner pot, 132 side wall, 1322 first wall section, 1324 second wall section, 134 bottom wall, 136 pot mouth, 140 second coil, 142 first sub-coil, 144 second sub-coil, 150 base, 152 mounting column, 160 shell, 170 cover, 200 first plane. DETAILED DESCRIPTION

[0111] In order to more clearly understand the above-mentioned purposes, features and advantages of the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0112] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present application is not limited to the specific embodiments disclosed below.

[0113] Refer to the following Figures 1 to 13 The cooking device provided according to some embodiments of the present application is described.

[0114] In some embodiments of the present application, a cooking device is provided. Figures 1 to 4E The schematic diagram of the structure of the cooking device of some embodiments of the present application is shown as follows: Figure 1 , Figure 2 , Figure 3 , Figure 4A , Figure 4B , Figure 4C , Figure 4D and Figure 4EAs shown, the cooking device 100 includes: an inner pot 130, the inner pot 130 has a center line P; a first coil 120, the first coil 120 is wound around the inner pot 130, the first coil 120 is configured to generate a magnetic field when powered on, the number of the first coils 120 is multiple, and the magnetic fields generated by at least two first coils 120 have the same polarity, the first coil 120 includes a long axis 124, and on a first plane 122 where the first coil 120 is located, the angle between the long axis 124 and a first straight line 126 satisfies a first angle; wherein the long axis 124 and the outermost turns of the first coil 120 have a first intersection X1 and a second intersection X2, and the distance between the first intersection X1 and the second intersection X2 is greater than or equal to the distance between any other two points on the first coil, the first straight line 126 is a straight line passing through the center of the first coil 120 and the first center point, and the first center point is the intersection of the center line of the inner pot 130 and the first plane 122.

[0115] In this embodiment, Figure 1 The plane XY in the figure is the first plane 122. The cooking device 100 includes, but is not limited to, an electric rice cooker, an electric soup cooker, an electric pressure cooker, and other cooking devices 100. The cooking device 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. Exemplarily, when the inner pot 130 is a spherical pot or a cylindrical inner pot, the center line P of the inner pot 130 is the axis. Exemplarily, when the inner pot 130 is a square inner pot or an inner pot of other shapes, the center line P of the inner pot 130 is a straight line passing through the center point of the inner pot mouth and the center point of the inner pot bottom wall.

[0116] For example, after being energized, the first coil 120 can generate a continuously alternating electromagnetic field, which continuously cuts the metal cookware and can generate eddy currents in the metal side walls 132 of the inner pot 130. When the overcurrent flows through the metal cookware, Joule heat is generated, thereby heating and cooking the ingredients in the pot, such as rice and water.

[0117] There are multiple first coils 120 , and at least two first coils 120 are arranged at intervals.

[0118] Exemplarily, the first coil 120 faces the bottom wall 134 of the inner pot 130 , and at least two first coils 120 are spaced apart in the circumferential direction of the bottom wall 134 of the inner pot 130 .

[0119] Figures 5 to 8 , Fig.10 A schematic diagram of the thermal field of the inner pot 130 of some embodiments of the present application is shown. Fig. 9 The schematic diagram of the structure of the cooking device 100 of some embodiments of the present application is shown as follows: Figure 5 , Figure 6 , Figure 7 , Figure 8 and Fig.10 As shown, due to the effect of magnetic field superposition, a strong magnetic field area is formed in the area where the magnetic field is superimposed between at least two first coils 120, and the position where the strong magnetic field area intersects with the inner pot 130 is a strong heat area. Figure 5 , Figure 6 , Figure 7 , Figure 8 and Fig.10 The arrow a in the figure points to the area with strong heat, and the arrow b points to the area with weak heat. Figure 6 , Figure 8 and Fig.10 The arrow in the figure indicates the direction in which heat is transferred from the heat-intensive area to the heat-weak area. Due to the heat transfer effect of the inner pot 130 itself, the heat energy of the heat-intensive area will be transferred to the heat-weak area.

[0120] The polarity of the magnetic field generated by at least two first coils 120 at the same time is the same. Exemplarily, at least two first coils 120 are connected in series, and the winding direction of at least two first coils 120 is the same, so at the same time, the current direction in at least two first coils 120 is the same, so that the polarity of the magnetic field generated by at least two first coils 120 at the same time is the same, which will form a region with weakened magnetic field between two adjacent first coils 120, and this region will form a weak heat area on the inner pot, and a strong heat area opposite to the weak heat area.

[0121] like Figure 1 , Fig. 9 and Fig.11 As shown, the present application sets the bottom heating coil, that is, the first coil 120 as a non-standard circular coil, and sets the long axis 124 of the first coil 120, Figure 1 Where L is the length of the major axis of the first coil 120, and H is the length of the minor axis of the elliptical coil. There is an angle between the major axis 124 and the straight line passing through the center of the first coil 120 and the first center point, wherein the major axis 124 of the first coil 120 is a straight line passing through the maximum width (or length) of the first coil 120. Exemplarily, among all the straight lines that have two intersections with the outermost turn of the first coil 120, the distance between the major axis 124 of the first coil 120 and the two intersections of the outermost turn of the coil, that is, the first intersection X1 and the second intersection X2 mentioned above, is the largest. Figure 4B X1 and X2 in FIG. 1 show the first intersection point X1 and the second intersection point X2 mentioned above.

[0122] The first center point is defined as the intersection of the center line P of the inner pot 130 and the first plane 122 where the first coil 120 is located. Therefore, the long axis 124 of the first coil 120 does not point to the first center point, but has a first angle. Figure 1 The point O in FIG. 1 shows the first center point mentioned above, Figure 2The straight line P in shows the center line of the inner pot 130.

[0123] This makes the end pointed by the long axis 124 of the first coil 120 away from the strong magnetic field area generated by the other first coil. As a result, the distance between the strong heat areas generated on the inner pot becomes farther, that is, the distance from the strong heat area to the weak heat area is lengthened, so that the strong heat area moves toward the edge of the bottom wall 134 of the inner pot 130, and the weak heat area moves toward the central area of ​​the bottom wall 134 of the inner pot 130, so that the position distribution of the strong heat area is more reasonable, and the heat transfer effect from the strong heat area to the weak heat area can be fully utilized, so that the heating power distribution is more uniform, and the problem of excessive heat concentration in some areas is avoided, so that the rice water inside the cooking device 100 is heated more evenly, and the cooked rice is more evenly soft and hard, and the surface is smoother, thereby improving the heating effect.

[0124] In some embodiments of the present application, optionally, Figure 1 As shown, the range of the first angle is: greater than 0° and less than or equal to 90°.

[0125] In this embodiment, assuming that the angle between the major axis 124 of the first coil 120 and the first straight line is A, the following relationship (1) is satisfied:

[0126] 0°<A≤90°. (1)

[0127] Among them, A is the above-mentioned first angle, and the above-mentioned first straight line 126 is a straight line on the first plane 122 where the first coil 120 is located, passing through the intersection of the center of the first coil 120 and the center line of the inner pot 130 on the first plane 122.

[0128] By setting the first angle to be between 0° and 90°, it can be ensured that the position distribution of the high heat area and the low heat area formed by the first coil 120 on the bottom wall 134 of the inner pot 130 is more reasonable, thereby making the heating effect of the cooking device 100 more uniform and improving the cooking effect.

[0129] In some embodiments of the present application, optionally, Figure 1 As shown, the range of the first angle is: greater than or equal to 35° and less than or equal to 55°.

[0130] In this embodiment, assuming that the angle between the major axis 124 of the first coil 120 and the first straight line is A, the following relationship (2) is satisfied:

[0131] 35°≤A≤55°. (2)

[0132] Wherein, the first straight line 126 is a straight line on the first plane 122 where the first coil 120 is located, passing through the center of the first coil 120 and the intersection point of the central axis of the inner pot 130 on the first plane 122.

[0133] Exemplarily, the range of the first angle is greater than or equal to 40° and less than or equal to 50°.

[0134] Exemplarily, the range of the first angle is greater than or equal to 43° and less than or equal to 47°.

[0135] Exemplarily, the first angle is 45°.

[0136] By setting the range of the first angle between 35° and 55°, it can ensure that the position distribution of the heat strong area and the heat weak area formed by the first coil 120 on the bottom wall 134 of the inner pot 130 is more reasonable, so that the heating effect of the cooking device 100 is more uniform and the cooking effect is improved.

[0137] In some embodiments of the present application, optionally, as Figure 1 , Figure 2 , Figure 3 and shown in FIG. 4, the number of the first coils 120 is at least 3, and at least 3 first coils 120 are arranged at intervals in the circumferential direction of the inner pot 130.

[0138] In this embodiment, the cooking device 100 is provided with 3 or at least two first coils 120. The first coil 120 can be located at the bottom of the inner pot 130, or a part of it can be located at the bottom of the inner pot 130 and the other part can be located on the circumferential side of the inner pot 130, and they are arranged at intervals along the circumferential direction of the chassis 114. Figure 1 The arrow Q in shows the circumferential direction of the chassis. By setting at least 3 first coils 120, it can achieve uniform coverage of a relatively large area of the bottom wall 134 of the inner pot 130 and improve the heating effect.

[0139] Exemplarily, the number of the first coils 120 is 3, and the 3 first coils 120 are arranged in a "pin" shape at the bottom of the inner pot 130.

[0140] Exemplarily, the number of the first coils 120 is 4. Among the 4 first coils 120, there are 2 groups of oppositely arranged first coils 120. The connection line of each group of oppositely arranged first coils 120 passes through the central axis of the first coil 120, and the connection lines between the 2 groups of first coils 120 are perpendicular to each other.

[0141] By setting at least 3 first coils 120 in the embodiments of the present application, it can achieve uniform coverage of a relatively large area of the bottom wall 134 of the inner pot 130, improve the heating effect, and at the same time enable the food ingredients to convect in the inner pot 130, improving the cooking effect.

[0142] In some embodiments of the present application, optionally, the first coil 120 is 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 to 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 to the other end of the first coil 120.

[0143] In this embodiment, illustratively, Figure 4A As shown, the first coil 120 is an elliptical coil, and the major axis of the first coil 120 is the major axis of the ellipse.

[0144] For example, Figure 4B As shown, the first coil 120 is a trapezoidal coil, wherein 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.

[0145] For example, Figure 4C As shown, the first coil 120 is a "crescent" shaped coil. In the circumferential direction of the inner pot, the width of each first coil 120 gradually widens from one side to the center, and then gradually narrows from the center to the other side, so that the first coil 120 is narrow at both sides and wide in the middle. The long axis of the first coil 120 is a straight line that has two intersections with the outermost layer of the first coil 120 and the distance between the two intersections is the farthest.

[0146] The present application sets a non-circular coil, so that the strong heat area and the weak heat area can be formed on the inner pot more reasonably, which increases the distance between the strong heat area and the weak heat area, thereby avoiding the problem of excessive heat concentration.

[0147] In some embodiments of the present application, optionally, the number of first coils 120 is at least two, and the straight-line distance between a first intersection point X1 on one of two adjacent first coils 120 and any point on the other first coil 120 is the largest; or, the straight-line distance between a second intersection point X2 on one of two adjacent first coils 120 and any point on the other first coil 120 is the largest.

[0148] In this embodiment, the number of the first coils 120 is at least two, and there are two intersections between the long axis of the first coil 120 and its outermost turn, namely the first intersection X1 and the second intersection X2. There is a point in the first intersection X1 and the second intersection X2 such that the distance between the point and any point on another adjacent first coil 120 is greater than the distance between other points of the current coil and any point on another adjacent first coil 120, namely, the distance between the point and the adjacent coil is the maximum.

[0149] Exemplarily, two adjacent first coils 120 include coil 1 and coil 2, the intersection of the long axis of coil 1 and the outermost turn of coil 1 is the first intersection X1 and the second intersection X2, and the distance between the first intersection X1 and any point on coil 2 is the largest.

[0150] Exemplarily, two adjacent first coils 120 include coil 1 and coil 2, the intersection of the long axis of coil 1 and the outermost turn of coil 1 is the first intersection X1 and the second intersection X2, and the distance between the second intersection X2 and any point on coil 2 is the largest.

[0151] The technical solution of the present application defines an intersection point of the long axis and the outermost turn of the coil, which is farthest from another adjacent coil, so that the end of the long axis of the first coil 120 is away from the strong magnetic field area generated by the other first coil 120, so that the strong heat area moves toward the edge of the bottom wall of the inner pot, and the weak heat area moves toward the central area of ​​the bottom wall of the inner pot, so that the position distribution of the strong heat area is more reasonable, and the heat transfer effect from the strong heat area to the weak heat area can be fully utilized, so that the heating power distribution is more uniform.

[0152] In some embodiments of the present application, optionally, the cooking device 100 further includes: a support assembly 110 , the support assembly 110 includes a main body 112 and a chassis 114 , a plurality of first winding portions 1142 are provided on the chassis 114 , and the first coil 120 is wound around the first winding portions 1142 .

[0153] In this embodiment, the cooking device includes a support assembly, and the support assembly 110 includes a body 112 and a bottom plate 114, wherein a plurality of first winding portions 1142 are provided on the bottom plate 114, and the first winding portions 1142 are used to wind a first coil 120, and the first coil 120 is a bottom heating coil of the cooking device 100. Exemplarily, an accommodating cavity is formed in the support assembly 110, and the inner pot 130 is located in the accommodating cavity.

[0154] Exemplarily, the number of the first coils 120 is equal to the number of the first winding parts 1142, that is, one first coil 120 is wound around each first winding part 1142. Exemplarily, the number of the first coils 120 is less than the number of the first winding parts 1142, that is, there is at least one empty first winding part 1142. By providing more first winding parts 1142, cooking devices of different models and different numbers of heating coils can all use the same bracket assembly 110, thereby improving the versatility and universality of the bracket assembly 110.

[0155] In some embodiments of the present application, optionally, Fig.12 The schematic diagram of the structure of the cooking device 100 of some embodiments of the present application is shown as follows: Fig.12As shown, the cooking device 100 also includes: an inner pot 130, the inner pot 130 includes a side wall 132 and a bottom wall 134, and the first coil 120 is arranged toward the bottom wall 134; the second coil 140, the second coil 140 is arranged on the body 112, and the second coil 140 is wound around the side of the side wall 132.

[0156] In this embodiment, the cooking device 100 includes an inner pot 130 and a second coil 140. The inner pot 130 is used to hold food, such as a rice-water mixture, etc. The first coil 120 is a bottom heating coil, and the first coil 120 is arranged toward the bottom wall 134 of the inner pot 130, and is used to heat the inner pot 130 from the bottom of the inner pot 130. The second coil 140 is wound on the body 112 of the bracket assembly 110, and the second coil 140 is a side heating coil, and is used to heat the inner pot 130 from the circumference of the inner pot 130.

[0157] Exemplarily, the total heating power of the at least two first coils 120 is greater than the heating power of the second coil 140 .

[0158] Exemplarily, the second coil 140 includes a plurality of single-turn coils spaced apart in a height direction of the inner pot 130 .

[0159] The embodiment of the present application simultaneously provides a bottom heating coil and a side heating coil, so that the cooking device 100 can heat the inner pot 130 and the food more evenly.

[0160] In some embodiments of the present application, optionally, the current directions of the second coil 140 and the adjacent positions of the first coil 120 are the same.

[0161] In this technical solution, at the same time, the current directions in at least two first coils 120 are the same, and the current directions in the adjacent positions of the second coil 140 and the first coil 120 are the same. In some embodiments, the second coil 140 and the first coil 120 are both wound clockwise or counterclockwise in the horizontal direction, and each coil turn in the second coil 140 is approximately parallel to the first coil 120. In this case, the current direction of the bottommost coil turn in the second coil 140 is the same as the current direction of each first coil 120.

[0162] In other embodiments, one side of a first coil 120 is tilted toward the direction close to the bottom wall of the inner pot. At this time, the tilted side of the first coil 120 is formed to be adjacent to the second coil 140, that is, the current direction of the tilted part of the first coil 120 is the same as the current direction of the tilted part of the second coil 140 close to the first coil 120.

[0163] By setting the current directions of the adjacent positions of the first coil 120 and the second coil 140 to be the same, the magnetic fields of the first coil 120 and the second coil 140 can be superimposed and strengthened to improve the cooking efficiency.

[0164] In some embodiments of the present application, optionally, the second coil 140 includes M layers of sub-coils spaced apart along the height direction of the inner pot, and at least N layers of sub-coils among the M layers of sub-coils are single-turn sub-coils, satisfying N / M≥2 / 5.

[0165] In this embodiment, the present application proposes a heating coil, namely the above-mentioned second coil 140, which includes a plurality of layers of sub-coils arranged at intervals in the height direction of the inner pot. By arranging the plurality of layers of sub-coils, the second coil 140 can cover and wrap the side wall of the inner pot, thereby achieving uniform heating of the inner pot.

[0166] The number of coil turns is positively correlated with the heating power of the coil. The more coil turns there are, the stronger the magnetic field generated is, the higher the heating power is, and the more likely it is to cause the problem of heat concentration caused by the local concentration of heating power. However, due to the limitation of processing technology, the wire diameter of the coil cannot be small enough. Therefore, in order to meet the maximum heating power of the cooking device and avoid the problem of excessive concentration of heat in the local area, in the cooking device proposed in this application, the multi-layer sub-coils of the second coil 140 are set, including at least some sub-coils as single-turn coils, wherein the single-turn sub-coil has only one turn at the same height, and the proportion of the number of single-turn coils in all sub-coils meets a specific proportion.

[0167] For example, it is assumed that in the second coil 140, the coil parts with the same height are set as a sub-coil, and the total number of sub-coils is M, that is, a total of M layers of sub-coils are set in the height direction of the inner pot. Among the M sub-coils on the M side, at least N layers of sub-coils are single-turn sub-coils.

[0168] That is, the total number of sub-coils is M, the number of single-turn sub-coils is N, and M and N satisfy the following relationship: N / M≥2 / 5.

[0169] That is to say, the proportion of the number of layers of the second coil 140 that are single-turn coils to the total number of layers of the second coil 140 is greater than or equal to 40%.

[0170] Exemplarily, the second coil 140 includes 100 layers of sub-coils, among which 45 layers of single-turn sub-coils are arranged.

[0171] Exemplarily, the second coil 140 includes 100 layers of sub-coils, and all of the 100 layers of sub-coils are single-turn sub-coils.

[0172] The technical solution of the present application is to arrange the heating coil as a plurality of sub-coils spaced apart in the height direction of the inner pot, wherein at least 40% of the sub-coils are single-turn coils, thereby effectively preventing excessive concentration of heat in a local area of ​​the side wall of the inner pot, thereby improving the uniformity of heating. When cooking rice, the cooked rice can be made uniform in hardness and softness and have a smooth surface, thereby improving the cooking effect of the cooking equipment.

[0173] In some embodiments of the present application, optionally, Figure 4D As shown, 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 . The projection of the side wall 132 on the first plane 200 where the first coil 120 is located overlaps with at least a portion of the first coil 120 .

[0174] In this embodiment, a portion of the first coil 120 extends beyond the edge of the bottom wall 134. Figure 4D The letter B in the figure indicates the distance that the first coil 120 extends out of the bottom wall 134. When the first coil 120 is energized, the magnetic field generated by the portion of the first coil 120 extending out of the edge of the bottom wall 134 will act on the side wall 132 of the pot body. Since the side wall 132 of the pot body is also provided with a second coil, the magnetic field generated by the second coil when energized will also act on the side wall 132 of the pot body. Therefore, the second coil and the portion of the first coil 120 extending out of the edge of the bottom wall 134 will jointly heat the side wall 132 of the pot body, thereby forming a strong hot zone on the pot body.

[0175] At least two first coils 120 are arranged at the bottom of the pot body. Two adjacent first coils 120 are arranged at intervals, and a weak heat zone is formed at the gap position between the two adjacent first coils 120.

[0176] The heat on the pot body will flow from the strong heat area to the weak heat area, so that the heat will flow from the outside of the pot body to the inside of the pot body, making the heat flow area larger and the path longer, so that the rice and water mixture in the pot body can be evenly and fully heated, thereby greatly improving the uniformity of the moisture of the whole pot of rice and improving the user's taste.

[0177] In some embodiments of the present application, optionally, Figure 4E As shown, the inner pot 130 also includes a side wall 132, a bottom wall 134 and a pot mouth 136. The first coil 120 is arranged toward the bottom wall 134. The projection of the side wall 132 on the first plane 200 where the first coil 120 is located overlaps with at least a portion of the first coil 120. The portion of the first coil 120 that overlaps with the projection of the side wall 132 is bent toward the pot mouth 136.

[0178] In this embodiment, a portion of the first coil 120 extends out of the edge of the bottom wall 134, and the portion of the first coil 120 extending out of the edge of the bottom wall 134 is bent toward the opening. Figure 4EThe letter C in the figure marks the area where the first coil 120 extends out of the bottom wall 134 and bends upward, so that a portion of the first coil 120 after the bend covers the side wall 132 of the pot body, and the second coil and the bent portion can form a strong heat zone on the pot body.

[0179] Exemplarily, at least two first coils 120 are disposed at the bottom of the pot body, and two adjacent first coils 120 are disposed at intervals, and a weak heat zone is formed at the gap position between the two adjacent first coils 120 .

[0180] The heat on the pot body will flow from the strong heat area to the weak heat area, so that the heat will flow from the outside of the pot body to the inside of the pot body, making the heat flow area larger and the path longer, so that the rice and water mixture in the pot body can be evenly and fully heated, thereby greatly improving the uniformity of the moisture of the whole pot of rice and improving the user's taste.

[0181] In some embodiments of the present application, optionally, Fig.12 As shown, a receiving cavity 1122 is enclosed in the body 112 , and the inner pot 130 is disposed in the receiving cavity 1122 . The bracket assembly 110 further includes: a second winding portion 1124 , which is disposed in the body 112 , and the second coil 140 is wound around the second winding portion 1124 .

[0182] In this embodiment, the cooking device 100 includes a support assembly 110, and a receiving cavity 1122 for placing an inner pot 130 is formed in the body 112 of the support assembly 110. Exemplarily, when the inner pot 130 is placed in a preset position in the receiving cavity 1122, the support assembly 110 forms a semi-wrapped state for the inner pot 130, and at this time, the peripheral side wall 132 of the support assembly 110 covers at least more than half of the area of ​​the side wall 132 of the inner pot 130.

[0183] The support assembly 110 includes a second winding portion 1124 for winding the second coil 140. Exemplarily, the second winding portion 1124 is disposed on the body 112 of the support assembly 110. Exemplarily, the first winding portion 1142 is a multi-layer winding groove, which is evenly distributed in the height direction of the inner pot 130.

[0184] The present application winds the second coil 140 by providing the second winding portion 1124 , which is helpful to reduce the assembly difficulty during the production and assembly of the cooking device 100 and improve the production efficiency.

[0185] In some embodiments of the present application, optionally, Figure 3As shown, the inner pot 130 also includes a pot mouth 136, and the side wall 132 includes a first wall section 1322 and a second wall section 1324. The first end of the first wall section 1322 forms the pot mouth 136, the second end of the first wall section 1322 is connected to the first end of the second wall section 1324, and the second section of the second wall section 1324 is connected to the bottom wall 134. In the direction from the pot mouth 136 to the bottom wall 134, the inner diameter of the second wall section 1324 decreases. Figure 4E The arrow K in FIG. 1 shows the height direction of the inner pot.

[0186] In this embodiment, the inner pot 130 is a "spherical pot". In the height direction of the inner pot 130, the inner pot 130 includes a pot mouth 136, a side wall 132 and a bottom wall 134 in sequence, wherein the side wall 132 of the inner pot 130 is divided into a first wall section 1322 and a second wall section 1324. The first wall section 1322 is a wall section close to the pot mouth 136, and the second wall section 1324 is a wall section close to the bottom wall 134. Exemplarily, the intersection of the first wall section 1322 and the second wall section 1324 is the position where the inner diameter of the inner pot 130 is the largest.

[0187] Since the area of ​​the bottom wall 134 is smaller than the area of ​​the pot mouth 136 , the second wall section 1324 is a hemispherical wall section that is excessively contracted inward, that is, the inner diameter of the second wall section 1324 decreases in the direction from the pot mouth 136 to the bottom wall 134 .

[0188] Exemplarily, the first wall segment 1322 is a cylindrical wall segment.

[0189] Exemplarily, the first wall segment 1322 is a hemispherical wall segment, and the inner diameter of the first wall segment 1322 decreases in the direction from the bottom wall 134 to the pot mouth 136 .

[0190] Exemplarily, the area of ​​the pot mouth 136 is greater than or equal to the area of ​​the bottom wall 134 .

[0191] The embodiment of the present application provides a "spherical pot" type inner pot 130 and reduces the area of ​​the bottom wall 134 to promote hot and cold convection in the inner pot 130, thereby driving the stirring of the rice water in the pot and improving the cooking effect.

[0192] In some embodiments of the present application, optionally, Figure 3 As shown, the second coil 140 includes a plurality of sub-coils distributed along the height direction of the inner pot 130, the plurality of sub-coils include a first sub-coil 142 wound around the first wall segment 1322, and a second sub-coil 144 wound around the second wall segment 1324, and the diameter of the first sub-coil 142 is greater than or equal to the diameter of the second sub-coil 144.

[0193] In this embodiment, the first wall section 1322 is a cylindrical wall section, that is, the first wall section 1322 is a hollow cylindrical structure. The second wall section 1324 is a hemispherical wall section, and the second wall section 1324 gradually converges inward from the pot mouth 136 to the bottom wall 134, so that the inner diameter is smaller as it is closer to the bottom wall 134. Exemplarily, the second wall section 1324 is defined as the R portion of the inner pot 130.

[0194] In the height direction of the inner pot 130 , the second coil 140 includes multiple layers of sub-coils. Exemplarily, each layer of sub-coils is a single-turn coil.

[0195] Among them, the sub-coil wound around the first wall segment 1322 is defined as the first sub-coil 142, and the sub-coil wound around the second wall segment 1324 is defined as the second sub-coil 144. The diameter of the first sub-coil 142 is greater than or equal to the diameter of the second sub-coil 144, that is, along the R portion of the inner pot 130, the second sub-coil 144 also converges inward as the side wall 132 of the inner pot 130 converges inward, thereby avoiding the problem of the second coil 140 arranged in the second wall segment 1324, that is, the R portion of the inner pot 130, being too far away from the side wall 132 of the inner pot 130, causing energy waste, and can improve the heating efficiency of the cooking device 100.

[0196] In some embodiments of the present application, optionally, Fig.13 Schematic diagrams of the structure of the base 150 of some embodiments of the present application are shown, such as Fig.13 As shown, the cooking device 100 further includes: a base 150 , and the base 150 includes a mounting column 152 ; wherein the bracket assembly 110 further includes a mounting portion 116 , and the mounting portion 116 is used to connect the mounting column 152 .

[0197] In this embodiment, the cooking device 100 includes a base 150, and the bracket assembly 110 is mounted on the base 150. The base 150 is provided with mounting posts 152, and illustratively, the number of mounting posts 152 is at least 2. The bracket assembly is provided with mounting portions 116 corresponding to the mounting posts 152, and illustratively, the top of the mounting posts 152 includes screw holes, and the mounting portions 116 include through holes. During assembly, bolts are passed through the through holes of the mounting portions 116 and then screwed to the screw holes of the mounting posts 152, thereby fixing the bracket assembly 110 on the base 150.

[0198] Exemplarily, when the mounting portion 116 and the mounting column 152 are connected and installed together, a gap is left between the bracket assembly 110 and the body 112 of the base 150, thereby preventing the bottom coil from contacting the base 150 and reserving heat dissipation space for the bottom coil.

[0199] The embodiment of the present application connects the base 150 and the bracket assembly 110 via the mounting column 152 , which facilitates assembly and can reserve sufficient installation and heat dissipation space for the coil assembly, thereby helping to reduce the complexity of the assembly process of the cooking device 100 .

[0200] In some embodiments of the present application, optionally, Fig.12 As shown, the cooking device 100 further includes: a shell 160 , which is connected to the base 150 , and the bracket assembly 110 is located in the shell 160 ; and a cover 170 , which is connected to the shell 160 in an openable and closable manner.

[0201] In this embodiment, the cooking device 100 includes a housing 160 and a cover 170. The housing 160 is connected to the base 150. The housing 160 and the base 150 enclose an installation cavity, and the bracket assembly 110 is arranged in the installation cavity. The cover 170 is connected to the top of the housing 160 in an openable and closable manner. When the cover 170 is in an open state, the opening of the accommodating cavity 1122 is exposed, and the user can take and put the inner pot 130. When the cover 170 is in a closed state, the opening of the accommodating cavity 1122 is covered by the cover 170. At this time, if the inner pot 130 is in a preset position of the accommodating cavity 1122, the inner pot 130 is also in a closed state.

[0202] In the embodiment of the present application, a shell 160 and a cover 170 are provided to form an exposed surface of the cooking device 100 , so that internal components of the cooking device 100 can be wrapped, thereby improving the reliability and aesthetics of the cooking device 100 .

[0203] In the description of this application, the term "plurality" refers to two or more than two. Unless otherwise clearly defined, the terms "upper" and "lower" indicate positions or positional relationships based on the positions or positional relationships described in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on this application. The terms "connect", "install", "fixed", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0204] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0205] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A cooking device, characterized in that: include: an inner pot, the inner pot having a center line; a first coil, the first coil being wound around the inner pot, the first coil being configured to generate a magnetic field when powered on, the number of the first coils being at least two, the magnetic fields generated by at least two of the first coils having the same polarity, the first coil comprising a long axis, and on a first plane where the first coil is located, an angle between the long axis and a first straight line satisfies a first angle; Among them, the major axis and the outermost turns of the first coil have a first intersection and a second intersection, and the distance between the first intersection and the second intersection is greater than or equal to the distance between any other two points on the first coil, the first straight line is a straight line passing through the center of the first coil and the first center point, and the first center point is the intersection of the center line of the inner pot and the first plane.

2. The cooking device according to claim 1, characterized in that: The range of the first angle is: greater than 0° and less than or equal to 90°.

3. The cooking device according to claim 1, characterized in that: The range of the first angle is: greater than or equal to 35° and less than or equal to 55°.

4. The cooking device according to claim 1, characterized in that: The number of the first coils is at least 3, and the at least 3 first coils are arranged at intervals in the circumferential direction of the inner pot.

5. The cooking device according to claim 1, characterized in that: The first coil is an elliptical coil or a trapezoidal coil; or The first coil is an arc-shaped coil. The width of the first coil increases from one end of the first coil to the center point of the first coil, and the width of the first coil decreases from the center point of the first coil to the other end of the first coil.

6. The cooking device according to claim 1, characterized in that The number of the first coils is at least two, and the straight-line distance between a first intersection point on one of two adjacent first coils and any point on the other first coil is the largest; Alternatively, the straight-line distance between the second intersection point on one of the two adjacent first coils and any point on the other first coil is the largest.

7. The cooking device according to any one of claims 1 to 6, characterized in that: Also includes: The support assembly comprises a main body and a chassis, a plurality of first winding parts are arranged on the chassis, and the first coil is wound around the first winding parts.

8. The cooking device according to claim 7, characterized in that The inner pot includes a side wall; the cooking device also includes: The second coil is arranged on the main body and is wound around the side wall.

9. The cooking device according to claim 8, characterized in that The current directions of the second coil and the first coil at adjacent positions are the same.

10. The cooking device according to claim 8, characterized in that The second coil includes M layers of sub-coils spaced apart in the height direction of the inner pot, and at least N layers of sub-coils among the M layers of sub-coils are single-turn sub-coils, satisfying N / M≥2 / 5.

11. The cooking device according to any one of claims 1 to 6, characterized in that: The inner pot further comprises a side wall and a bottom wall, the first coil is arranged towards the bottom wall, and a projection of the side wall on a first plane where the first coil is located overlaps with at least a portion of the first coil.

12. The cooking device according to any one of claims 1 to 6, characterized in that: The inner pot also includes a side wall, a bottom wall and a pot mouth. The first coil is arranged toward the bottom wall. The projection of the side wall on the first plane where the first coil is located overlaps with at least part of the first coil. The part of the first coil overlapping with the projection of the side wall is bent toward the pot mouth.

13. The cooking device according to claim 8, characterized in that The inner pot also includes a bottom wall and a pot mouth, and the side wall includes a first wall segment and a second wall segment, the first end of the first wall segment forms the pot mouth, the second end of the first wall segment is connected to the first end of the second wall segment, and the second segment of the second wall segment is connected to the bottom wall, and the inner diameter of the second wall segment decreases in the direction from the pot mouth to the bottom wall.

14. The cooking device according to claim 13, characterized in that The second coil includes a plurality of sub-coils distributed along the height direction of the inner pot, the plurality of sub-coils include a first sub-coil wound around the first wall segment, and a second sub-coil wound around the second wall segment, and a diameter of the first sub-coil is greater than or equal to a diameter of the second sub-coil.

15. The cooking device according to claim 7, characterized in that Also includes: a base, the base including a mounting post; Wherein, the bracket assembly also includes a mounting portion, and the mounting portion is used to connect the mounting column.

16. The cooking device according to claim 15, characterized in that Also includes: A shell, the shell is connected to the base, and the bracket assembly is located in the shell; A cover body is connected to the shell in an openable and closable manner.

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