Cooking equipment

Abstract

The utility model provides cooking equipment which comprises a pot body and at least two first coils, the pot body is provided with an opening, a side wall and a bottom wall, the first coils and the bottom wall are oppositely arranged, and the projection of the side wall on a first plane where the first coils are located coincides with at least part of the first coils. And a part of the first coils overlapped with the projection of the side wall is bent towards the opening, and the magnetic field polarities of the at least two first coils are the same. The polarities of the magnetic fields of the at least two first coils are the same, namely, the current directions of the at least two first coils are the same, the directions of the magnetic fields generated at the adjacent positions of the first coils are opposite, and the adjacent magnetic fields in the opposite directions can be mutually offset to a certain extent, so that a heat weak area is formed between the two adjacent first coils; and heat on the pot body can flow to the weak heat area, so that heat exchange is formed among the areas on the pot body.

Description

Technical Field

[0001] The utility model relates to the technical field of cooking equipment, in particular to a cooking equipment. Background Art

[0002] Electromagnetic heating technology is a method of generating a high-frequency alternating magnetic field through a coil, which acts on ferrous metal to form eddy current heating.

[0003] For the current electromagnetic heating rice cooker, a ring-shaped coil is arranged under the inner pot, forming a circular heat-intensive area at the bottom of the inner pot. The heat-intensive area at the bottom is not easy to exchange heat with other areas on the inner pot, thereby affecting the steaming effect of rice. Utility Model Content

[0004] The utility model aims to solve one of the technical problems existing in the prior art or related technology.

[0005] In view of this, in a first aspect, the utility model proposes a cooking device, comprising: a pot body, the pot body having an opening, a side wall and a bottom wall; at least two first coils, arranged opposite to the bottom wall, at least two first coils are distributed at intervals along the circumference of 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 a part of the first coil overlapping with the projection of the side wall is bent toward the opening; wherein, the magnetic field polarity of at least the two first coils is the same.

[0006] The cooking device provided by the utility model has a first coil arranged at the bottom of the pot body, and when the first coil is energized, the first coil heats the pot body. 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 of the pot body.

[0007] The first coil covers a portion of the side of the pot body, so that the first coil can heat a portion of the side of the pot body, thereby increasing the coverage area of ​​the first coil and increasing the heated area of ​​the pot body, which is beneficial to the heating speed of the rice-water mixture and shortens the cooking time.

[0008] The magnetic field polarity of at least two first coils is the same, that is, the current direction of at least two first coils is the same, however, the current directions of two adjacent first coils at adjacent positions are opposite, so that the magnetic fields generated at adjacent positions of the two adjacent first coils are opposite in direction, and the adjacent magnetic fields of opposite directions will cancel each other out to a certain extent, thereby presenting a thermally weak area between the two adjacent first coils.

[0009] The area on the pot body covered by the first coil will form a heat-intense area. The heat on the pot body will flow from the heat-intense area to the heat-weak area, and heat exchange will occur between different areas on the pot body, so that the rice-water mixture in the pot can be evenly and sufficiently heated, thus greatly improving the uniformity of the moisture in the whole pot of rice and enhancing the user experience.

[0010] Exemplarily, the number of the first coils is 2, and the two second coils are distributed in a "Lv" shape.

[0011] Exemplarily, the number of the first coils is 3, and the three second coils are distributed in a "Pin" shape.

[0012] Exemplarily, the number of the first coils is 4, and the four second coils are distributed in a [specific shape] shape.

[0013] In addition, the cooking device according to the above technical solution provided by the present invention may further have the following additional technical features:

[0014] In some technical solutions, optionally, the cooking device further includes: an excitation circuit, which is electrically connected to the first coil; one of the adjacent two first coils is set as the first sub-coil, and the other is set as the second sub-coil; the winding directions of the first sub-coil and the second sub-coil are the same, and the connection manners of the in-line end and the out-line end of the first sub-coil with the output positive electrode and the output negative electrode of the excitation circuit are the same as those of the in-line end and the out-line end of the second sub-coil with the output positive electrode and the output negative electrode of the excitation circuit; or, the winding directions of the first sub-coil and the second sub-coil are opposite, and the connection manners of the in-line end and the out-line end of the first sub-coil with the output positive electrode and the output negative electrode of the excitation circuit are opposite to those of the in-line end and the out-line end of the second sub-coil with the output positive electrode and the output negative electrode of the excitation circuit.

[0015] When the winding directions of the adjacent two first coils are the same, the adjacent two first coils are both wound in the clockwise direction or both wound in the counterclockwise direction. The in-line end of the first sub-coil is connected to the output positive electrode of the excitation circuit, and the out-line end of the first sub-coil is connected to the output negative electrode of the excitation circuit. Similarly, the in-line end of the second sub-coil is connected to the output positive electrode of the excitation circuit, and the out-line end of the second sub-coil is connected to the output negative electrode of the excitation circuit. Thus, the current directions in the first sub-coil and the second sub-coil are the same.

[0016] When the winding directions of two adjacent first coils are opposite, one first coil is wound in a clockwise direction, and the other first coil is wound in a counterclockwise direction. When the input end of the first sub-coil is connected to the output positive pole of the excitation circuit, the input end of the second sub-coil is connected to the output negative pole of the excitation circuit. In this case, although the winding directions of the two adjacent first coils are opposite, the ends of the two adjacent first coils through which the current is passed are different, which makes the current directions of the two adjacent first coils the same. Through the above method, the rice-water mixture in the pot body is evenly and fully heated, thereby greatly improving the uniformity of the moisture content of the whole pot of rice and improving the user's taste.

[0017] In some technical solutions, optionally, the cooking device further includes: a second coil, located on the side of the pot body, the second coil is distributed along the circumference of the pot body, and the magnetic field polarity of the second coil is the same as that of the first coil.

[0018] When the magnetic field polarity of the first coil and the second coil is the same, the current direction of the first coil and the second coil is the same, and the current direction of the first coil and the second coil is the same at adjacent positions, so that the magnetic field direction generated by the first coil and the second coil at adjacent positions is the same, and the adjacent magnetic fields with the same direction will overlap to a certain extent, so that a strong heat area appears between the first coil and the second coil. The heat on the pot body will flow from the strong heat area to the weak heat area, so that the heat flows from the outside of the pot body to the inside of the pot body, so that the area where the heat flows is larger and the path is longer, and heat exchange is formed between the various areas on the pot body, so that the rice-water mixture in the pot body is evenly and fully heated, thereby greatly improving the uniformity of the moisture of the whole pot of rice and improving the user's taste.

[0019] In some technical schemes, optionally, the excitation circuit is also electrically connected to the second coil; wherein, the winding directions of the first coil and the second coil are the same, and the connection method of the input and output terminals of the first coil to the output positive and output negative poles of the excitation circuit is the same as the connection method of the input and output terminals of the second coil to the output positive and output negative poles of the excitation circuit; or, the winding directions of the first coil and the second coil are opposite, and the connection method of the input and output terminals of the first coil to the output positive and output negative poles of the excitation circuit is opposite to the connection method of the input and output terminals of the second coil to the output positive and output negative poles of the excitation circuit.

[0020] When the winding directions of the first coil and the second coil are the same, the first coil and the second coil are both wound in a clockwise direction, or both are wound in a counterclockwise direction. When the input end of the first coil is connected to the positive output of the excitation circuit, and the input end of the second coil is connected to the positive output of the excitation circuit, the current directions of the first coil and the second coil are the same.

[0021] When the winding directions of the first coil and the second coil are opposite, the input end of the first coil is connected to the positive output of the excitation circuit, and the output end of the second coil is connected to the positive output of the excitation circuit. In this case, although the winding directions of the first coil and the second coil are opposite, the ends of the first coil and the second coil passing the current are different, which makes the current directions of the first coil and the second coil the same. In the above manner, it is ensured that the side of the pot forms a heat-intensive area.

[0022] In some technical solutions, optionally, the pot body has a center line, and a portion of the first coil bent toward the opening in a direction perpendicular to the center line overlaps with a portion of the second coil.

[0023] A portion of the first coil is bent toward the opening, and a portion of the first coil after the bending overlaps with the second coil. Since the first coil and the second coil have overlapping portions, the overlapping portions heat the pot body together, thereby forming a heat concentration area on the pot body, that is, a heat-intensive area is formed on the pot body, and heat flows from the heat-intensive area to the heat-weak area, so that the rice-water mixture in the pot body is fully and evenly heated, so that the whole pot of rice with a uniform taste can be cooked.

[0024] In some technical schemes, optionally, the pot body has a center line, the second coil includes a first part, and a part of the first coil bent toward the opening overlaps with the first part; the distance between the part of the first coil bent toward the opening and the center line is L1, and the distance between the first part and the center line is L2, L1>L2.

[0025] A portion of the first coil is bent toward the opening, wherein the first portion of the second coil overlaps with the bent portion of the first coil, and a distance between the bent portion of the first coil and the center line is larger, while a distance between the first portion and the center line is smaller. The bent first coil is located further outward than the first portion, thereby avoiding interference between the bent first coil and a portion of the second coil, thereby ensuring stable operation of the first coil and the second coil.

[0026] In some technical solutions, optionally, the first coil and the second coil are arranged at intervals.

[0027] The unbent portion of the first coil is spaced apart from the second coil, and the portion of the first coil that is bent toward the opening is spaced apart from the second coil, that is, there is no contact portion between the first coil and the second coil, thereby avoiding mutual interference between the first coil and the second coil and reducing the damage rate of the first coil and the second coil.

[0028] In some technical solutions, optionally, at least two first coils are connected in series in sequence, and the first coil and the second coil are respectively connected to different excitation circuits; or at least two first coils are connected in series in sequence, and the second coil is connected in series with one first coil.

[0029] The first coil and the second coil disk are connected in series, with one output mode, and the current directions of the four first coils are in the same direction.

[0030] Alternatively, the four first coils at the bottom can be connected in series to form one output, and the second coils at the side can independently form one output. These two coils work independently to expand the cooking output needs of different foods.

[0031] In some technical solutions, optionally, the pot body has a center line, and multiple turns of a second coil are formed on the pot body from the opening to the bottom wall; the distance between the second coil and the center line is L3, and the distance between the side wall of the pot body and the center line is L4, and L3 is positively correlated with L4.

[0032] The second coil is a coil wound circumferentially around the central axis of the side coil disk. The pot body is surrounded by the side coil disk. The diameter of the opening side of the pot body is larger, and the diameter of the bottom side of the pot body is smaller. Correspondingly, the diameter of the second coil on the opening side of the pot body is larger, and the diameter of the second coil on the bottom side of the pot body is smaller. The diameter of the second coil is related to the diameter of the pot body, which is beneficial to improving the heating effect of the pot body.

[0033] In some technical solutions, optionally, the pot body has a center line, and along the extension direction of the center line, the distance between the side of the first coil adjacent to the side of the pot body and the pot body is H1, and the distance between the side of the first coil away from the side of the pot body and the pot body is H2, H2>H1.

[0034] In some technical solutions, optionally, the distance between the first coil and the bottom wall will affect the amount of heat on the bottom wall. When the distance between the first coil and the bottom wall is small, the heat at the corresponding position on the bottom wall is high. When the distance between one side of the first coil and the bottom wall is large, the heat at the corresponding position on the bottom wall is low. Therefore, at the position where the distance between the first coil and the bottom wall is small, a strong heat area will be formed on the bottom wall, and at the position where the distance between the first coil and the bottom wall is large, a weak heat area will be formed on the bottom wall. The heat on the pot body will flow from the strong heat area to the weak heat area, so that the heat flows from the outside of the pot body to the inside of the pot body. Since the distance between the position of the first coil adjacent to the bottom of the pot body and the bottom wall is small, the heat at the position near the side of the pot body in the bottom wall is high, and the heat at the center of the bottom wall is low, so that the heat flow area can be further increased, the heat flow path can be longer, and the uniformity of the moisture of the whole pot of rice can be further improved, and the user's taste can be improved.

[0035] In some technical solutions, optionally, the pot body has a center line, the width of the first coil along the first direction is the largest, and along the first direction, the first side of the first coil is adjacent to the center line.

[0036] The widths of the first coil along different directions may be different, and the first coil has a maximum width. Specifically, the first coil has a maximum width in the first direction.

[0037] In the first direction, the first side of the first coil is adjacent to the center line, that is, one side of the first coil along the maximum width direction is adjacent to the center line. Therefore, the position where the first coil has a smaller width is distributed along the circumference of the bottom wall. In the circumference of the bottom wall, the first coil occupies a smaller space, so that more first coils can be distributed under the bottom wall, thereby increasing the coverage area of ​​the bottom wall by at least two first coils, which is beneficial to increasing the heating speed of the bottom wall, thereby improving the cooking efficiency of the rice-water mixture.

[0038] In some technical solutions, optionally, the second side of the first coil is bent toward the opening, and the first side of the first coil and the second side of the first coil are two opposite sides of the first coil.

[0039] Along the maximum width direction of the first coil, the second side of the first coil is bent toward the opening, and the second side of the first coil has a smaller width. In this case, only a small portion of the first coil needs to be bent, thereby reducing the difficulty of winding the first coil.

[0040] In some technical solutions, optionally, the cooking device further includes: a temperature controller, which is arranged opposite to the bottom wall, and the temperature controller is located between at least two first coils.

[0041] Exemplarily, a bottom coil disk is arranged at the bottom of the pot body, the first coil is wound on the bottom coil disk, the thermostat is assembled in the center hole of the bottom coil disk, and the thermostat contacts the lower surface of the pot body. The thermostat is used to collect the temperature of the pot body, thereby controlling the operation of the first coil and the second coil.

[0042] At least two first coils are distributed along the circumference of the thermostat, so that the temperature distribution around the thermostat is uniform, thereby improving the accuracy of the temperature collected by the thermostat.

[0043] Additional aspects and advantages of the present invention will become apparent in the following description or will be understood through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0045] Figure 1 A schematic diagram of the structure of a cooking device in an embodiment of the utility model is shown;

[0046] Figure 2 One of the partial schematic diagrams of the cooking device in the embodiment of the utility model is shown;

[0047] Figure 3 A second partial schematic diagram of a cooking device in an embodiment of the utility model is shown;

[0048] Figure 4 A third partial schematic diagram of a cooking device in an embodiment of the present utility model is shown;

[0049] Figure 5 One of the structural schematic diagrams of the first coil, the second coil and the pot body in the embodiment of the utility model is shown;

[0050] Figure 6 The second schematic diagram of the structure of the first coil, the second coil and the pot body in the embodiment of the utility model is shown;

[0051] Figure 7 One of the schematic diagrams showing the distribution of the high heat area and the low heat area on the pot body in the embodiment of the utility model is shown;

[0052] Figure 8 The second schematic diagram shows the distribution of the high heat area and the low heat area on the pot body in the embodiment of the utility model;

[0053] Fig. 9 The third schematic diagram shows the distribution of the high heat area and the low heat area on the pot body in the embodiment of the utility model;

[0054] Fig.10 A schematic diagram showing the positional relationship between the first coil and the bottom wall in an embodiment of the utility model is shown.

[0055] Reference numerals:

[0056] 100 pot body, 110 heat-intensive zone, 120 heat-weak zone, 130 opening, 140 bottom wall, 150 excitation circuit, 160 side wall, 200 first coil, 210 first sub-coil, 220 second sub-coil, 300 second coil, 310 first part, 400 thermostat, 500 upper cover assembly, 600 bottom coil disk, 700 side coil disk, 800 power board, 900 pot body assembly. DETAILED DESCRIPTION

[0057] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model 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.

[0058] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0059] Refer to the following Figures 1 to 10 The cooking device provided according to some embodiments of the present invention is described.

[0060] Combination Figure 1 , Figure 5 and Figure 6 As shown, in an embodiment of the utility model, a cooking device is provided, comprising: a pot body 100 and a first coil 200, the pot body 100 has an opening 130, a side wall 160 and a bottom wall 140, the number of the first coil 200 is at least two, the first coil 200 is arranged opposite to the bottom wall 140, and at least two first coils 200 are arranged along the circumference of the bottom wall 140 ( Figure 5 The projections of the side walls 160 on a first plane X (the plane where the first coil 200 is located is defined as the first plane X, and illustratively, any three points can be taken on the first coil 200, and the planes corresponding to the three points are the first plane X) where the first coil 200 is located overlap with at least a portion of the first coil 200, and a portion of the first coil 200 that overlaps with the projection of the side walls 160 is bent toward the opening 130, and the magnetic field polarities of at least two first coils 200 are the same.

[0061] The cooking device provided by the utility model has a first coil 200 disposed at the bottom of the pot body 100. When the first coil 200 is energized, the first coil 200 heats the pot body 100. A portion of the first coil 200 extends out of the edge of the bottom wall 140, and a portion of the first coil 200 extending out of the edge of the bottom wall 140 is bent toward the opening 130, so that the bent portion of the first coil 200 covers the side of the pot body 100.

[0062] The first coil 200 covers a portion of the side of the pot body 100, so that the first coil 200 can heat a portion of the side of the pot body 100, thereby increasing the coverage area of ​​the first coil 200 and increasing the heated area of ​​the pot body 100, which is beneficial to the heating speed of the rice-water mixture and shortens the cooking time.

[0063] The magnetic field polarity of at least two first coils 200 is the same, that is, the current direction of at least two first coils 200 is the same, however, the current directions of two adjacent first coils 200 at adjacent positions are opposite, so that the magnetic fields generated at adjacent positions of the two adjacent first coils 200 are opposite in direction, and the adjacent magnetic fields of opposite directions will cancel each other out to a certain extent, thereby presenting a thermally weak area between the two adjacent first coils 200.

[0064] A high-heat area will be formed on the pot body 100 in the area covered by the first coil 200, and the heat on the pot body 100 will flow from the high-heat area to the low-heat area, forming heat exchange between the various areas on the pot body 100, so that the rice-water mixture in the pot body 100 is evenly and fully heated, thereby greatly improving the uniformity of the moisture in the whole pot of rice and improving the user's taste.

[0065] Exemplarily, the number of the first coils 200 is two, and the two second coils are distributed in an "Lv" shape.

[0066] Exemplarily, the number of the first coils 200 is three, and the three second coils are distributed in a "Pin" shape.

[0067] Exemplarily, the number of the first coils 200 is four, and the four second coils are distributed in a

[0068] The cooking device includes but is not limited to cooking devices such as rice cookers, electric soup pots, and electric pressure cookers.

[0069] In some embodiments, optionally, the cooking device further includes: an excitation circuit 150, and the excitation circuit 150 is electrically connected to the first coil 200. One of the adjacent two first coils 200 is set as the first sub-coil 210, and the other is set as the second sub-coil 220. The winding directions of the first sub-coil 210 and the second sub-coil 220 are the same, and the connection manners of the in-line end and the out-line end of the first sub-coil 210 with the output positive electrode and the output negative electrode of the excitation circuit 150 are the same as those of the in-line end and the out-line end of the second sub-coil 220 with the output positive electrode and the output negative electrode of the excitation circuit 150. Alternatively, the winding directions of the first sub-coil 210 and the second sub-coil 220 are opposite, and the connection manners of the in-line end and the out-line end of the first sub-coil 210 with the output positive electrode and the output negative electrode of the excitation circuit 150 are opposite to those of the in-line end and the out-line end of the second sub-coil 220 with the output positive electrode and the output negative electrode of the excitation circuit 150.

[0070] Alternatively, the winding directions of the first sub-coil 210 and the second sub-coil 220 are opposite. The in-line end of the first sub-coil 210 and the out-line end of the second sub-coil 220 are both connected to the output positive electrode of the excitation circuit 150, and the out-line end of the first sub-coil 210 and the in-line end of the second sub-coil 220 are both connected to the output negative electrode of the excitation circuit 150.

[0071] When the winding directions of the adjacent two first coils 200 are the same, the adjacent two first coils 200 are both wound in the clockwise direction or both wound in the counterclockwise direction. The in-line end of the first sub-coil 210 is connected to the output positive electrode of the excitation circuit 150, and the out-line end of the first sub-coil 210 is connected to the output negative electrode of the excitation circuit 150. Similarly, the in-line end of the second sub-coil 220 is connected to the output positive electrode of the excitation circuit 150, and the out-line end of the second sub-coil 220 is connected to the output negative electrode of the excitation circuit 150. Thus, the current directions in the first sub-coil 210 and the second sub-coil 220 are the same ( Figure 5 in, the arrows on the first sub-coil 210 and the second sub-coil 220 are used to represent the current directions).

[0072] When the winding directions of the two adjacent first coils 200 are opposite, one first coil 200 is wound in a clockwise direction, and the other first coil 200 is wound in a counterclockwise direction. When the input end of the first sub-coil 210 is connected to the output positive pole of the excitation circuit 150, the input end of the second sub-coil 220 is connected to the output negative pole of the excitation circuit 150. In this case, although the winding directions of the two adjacent first coils 200 are opposite, the ends of the two adjacent first coils 200 through which the current is passed are different, which makes the current direction of the two adjacent first coils 200 the same. In the above manner, the rice-water mixture in the pot body 100 is evenly and fully heated, thereby greatly improving the uniformity of the moisture content of the whole pot of rice and improving the user's taste.

[0073] In some embodiments, optionally, the cooking device further includes: a second coil 300 located on the side of the pot body 100 , the second coil 300 is distributed along the circumference of the pot body 100 , and the magnetic field polarity of the second coil 300 is the same as that of the first coil 200 .

[0074] When the magnetic field polarities of the first coil 200 and the second coil 300 are the same, the current directions of the first coil 200 and the second coil 300 are the same, and the current directions of the first coil 200 and the second coil 300 are the same at adjacent positions ( Figure 5 In the figure, the arrow on the second coil 300 indicates the direction of the current), so that the magnetic fields generated by the first coil 200 and the second coil 300 at adjacent positions have the same direction, and the adjacent magnetic fields with the same direction will overlap each other to a certain extent, so that a strong heat area appears between the first coil 200 and the second coil 300. The heat on the pot body 100 will flow from the strong heat area to the weak heat area ( Figure 8 The middle arrow is used to indicate the direction of heat flow), so that the heat flows from the outside of the pot body 100 to the inside of the pot body 100, making the area where the heat flows larger and the path longer, and forming heat exchange between various areas on the pot body 100, so that the rice-water mixture in the pot body 100 is evenly and fully heated, thereby greatly improving the uniformity of the moisture of the whole pot of rice and improving the user's taste.

[0075] In some technical solutions, optionally, the excitation circuit 150 is also electrically connected to the second coil 300. The first coil 200 and the second coil 300 have the same winding direction, and the connection mode of the input and output terminals of the first coil 200 to the positive output and negative output of the excitation circuit 150 is the same as the connection mode of the input and output terminals of the second coil 300 to the positive output and negative output of the excitation circuit 150. Alternatively, the first coil 200 and the second coil 300 have opposite winding directions, and the connection mode of the input and output terminals of the first coil 200 to the positive output and negative output of the excitation circuit 150 is opposite to the connection mode of the input and output terminals of the second coil 300 to the positive output and negative output of the excitation circuit 150.

[0076] Alternatively, the winding directions of the first coil 200 and the second coil 300 are opposite, the input end of the first coil 200 and the output end of the second coil 300 are both connected to the positive output pole of the excitation circuit 150, and the output end of the first coil 200 and the input end of the second coil 300 are both connected to the negative output pole of the excitation circuit 150.

[0077] When the winding directions of the first coil 200 and the second coil 300 are the same, the first coil 200 and the second coil 300 are both wound in a clockwise direction, or both wound in a counterclockwise direction. When the input end of the first coil 200 is connected to the positive output of the excitation circuit 150, and the input end of the second coil 300 is connected to the positive output of the excitation circuit 150, the current directions of the first coil 200 and the second coil 300 are the same.

[0078] When the winding directions of the first coil 200 and the second coil 300 are opposite, the input end of the first coil 200 is connected to the positive output of the excitation circuit 150, and the output end of the second coil 300 is connected to the positive output of the excitation circuit 150. In this case, although the winding directions of the first coil 200 and the second coil 300 are opposite, the ends of the first coil 200 and the second coil 300 through which the current flows are different, which makes the current directions of the first coil 200 and the second coil 300 the same. In the above manner, it is ensured that the side of the pot body 100 forms a heat-intensive area.

[0079] Combination Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the cooking device is composed of an upper cover assembly 500, a pot body 100, a bottom coil plate 600, a side coil plate 700, a thermostat 400, a power board 800, a pot body assembly 900, a first coil 200 and a second coil 300.

[0080] A power board 800 , a bottom coil disk 600 and a side coil disk 700 are assembled inside the pot body assembly 900 . The upper cover assembly 500 covers from above to limit the pot body 100 in the pot body assembly 900 .

[0081] In some embodiments, optionally, the pot body 100 has a center line C, and a portion of the first coil 200 bent toward the opening 130 along a direction perpendicular to the center line C partially overlaps with a portion of the second coil 300 .

[0082] A portion of the first coil 200 is bent toward the opening 130, and the bent portion of the first coil 200 overlaps with the second coil 300. Since the first coil 200 and the second coil 300 have overlapping portions, the overlapping portions heat the pot body 100 together, thereby forming a heat concentration area in the pot body 100. Figure 7 , Figure 8 and Fig. 9 As shown, a heat-intensive area 110 is formed on the pot body 100, and heat flows from the heat-intensive area 110 to the heat-weak area 120, so that the rice-water mixture in the pot body 100 is fully and evenly heated, thereby being able to cook a whole pot of rice with a more uniform taste.

[0083] like Figure 6 As shown, in some embodiments, optionally, the second coil 300 includes a first portion 310 ( Figure 6 The portion of the second coil 300 in the area within the solid line frame is the first portion 310), and the portion of the first coil 200 bent toward the opening 130 overlaps with the first portion 310; the distance between the portion of the first coil 200 bent toward the opening 130 and the center line C is L1, and the distance between the first portion 310 and the center line C is L2, L1>L2.

[0084] A portion of the first coil 200 is bent toward the opening 130, wherein the first portion 310 of the second coil 300 overlaps with the bent portion of the first coil 200, and the bent portion of the first coil 200 is spaced relatively large from the center line C, while the first portion 310 is spaced relatively small from the center line C. The bent first coil 200 is positioned further outward than the first portion 310, thereby avoiding interference between the bent first coil 200 and a portion of the second coil 300, and ensuring stable operation of the first coil 200 and the second coil 300.

[0085] Combination Figure 4 , Figure 5 and Figure 6 As shown, in some embodiments, optionally, the first coil 200 and the second coil 300 are arranged at intervals.

[0086] The unbent portion of the first coil 200 is spaced apart from the second coil 300, and the portion of the first coil 200 that is bent toward the opening 130 is spaced apart from the second coil 300, that is, there is no contact portion between the first coil 200 and the second coil 300, thereby avoiding mutual interference between the first coil 200 and the second coil 300 and reducing the damage rate of the first coil 200 and the second coil 300.

[0087] In some embodiments, optionally, at least two first coils 200 are connected in series in sequence, and the first coil 200 and the second coil 300 are respectively connected to different excitation circuits; or at least two first coils 200 are connected in series in sequence, and the second coil 300 is connected in series with one first coil 200.

[0088] The first coil 200 and the second coil 300 are connected in series in a one-way output mode, and the currents passing through the four first coils 200 are in the same direction.

[0089] Alternatively, the four first coils 200 at the bottom can be connected in series to form one output, and the second coils 300 at the side can independently form one output. The two coils can work independently to expand the cooking output requirements of different foods.

[0090] In some embodiments, optionally, a plurality of turns of the second coil 300 are formed on the pot body 100 from the opening 130 to the bottom wall 140; the distance between the second coil 300 and the center line C is L3, the distance between the side wall of the pot body 100 and the center line C is L4, and L3 is positively correlated with L4.

[0091] The second coil 300 is a coil wound circumferentially around the central axis of the side coil disk 700. The pot body 100 is surrounded by the side coil disk 700. The diameter of the pot body 100 on the opening 130 side is larger, and the diameter of the pot body 100 on the bottom side is smaller. Correspondingly, the diameter of the second coil 300 on the opening 130 side of the pot body 100 is larger, and the diameter of the second coil 300 on the bottom side of the pot body 100 is smaller. The diameter of the second coil 300 is related to the diameter of the pot body 100, which is beneficial to improving the heating effect of the pot body 100.

[0092] like Fig.10 As shown, in some embodiments, optionally, the pot body 100 has a center line C, and along the extension direction of the center line C, the distance between the side of the first coil 200 adjacent to the side of the pot body 100 and the pot body 100 is H1, and the distance between the side of the first coil 200 away from the side of the pot body 100 and the pot body 100 is H2, and H2>H1 (in order to conveniently show the relationship between the first coil 200 and the bottom wall 140, the other first coils 200 are hidden).

[0093] In some embodiments, optionally, the distance between the first coil 200 and the bottom wall 140 may affect the amount of heat on the bottom wall 140. When the distance between the first coil 200 and the bottom wall 140 is smaller, the heat at the corresponding position on the bottom wall 140 is higher. When the distance between one side of the first coil 200 and the bottom wall 140 is larger, the heat at the corresponding position on the bottom wall 140 is lower.

[0094] Therefore, at the position where the first coil 200 and the bottom wall 140 are spaced relatively small, a strong heat area 110 will be formed on the bottom wall 140, and at the position where the first coil 200 and the bottom wall 140 are spaced relatively large, a weak heat area 120 will be formed on the bottom wall 140, and the heat on the pot body 100 will flow from the strong heat area 110 to the weak heat area 120, so that the heat flows from the outside of the pot body 100 to the inside of the pot body 100. Since the distance between the first coil 200 and the bottom wall 140 near the bottom of the pot body 100 is relatively small, the heat at the position near the side of the pot body 100 in the bottom wall 140 is relatively high, and the heat at the center of the bottom wall 140 is relatively low, so that the heat flow area can be further increased, the heat flow path can be longer, and the moisture uniformity of the whole pot of rice can be further improved, and the user's taste can be improved.

[0095] Combination Figure 2 and Figure 6 As shown, in some embodiments, optionally, the first coil 200 is arranged along a first direction ( Figure 2 The width of the first coil 200 is the largest as indicated by the arrow at A in the figure. Along the first direction, the first side of the first coil 200 is adjacent to the center line C.

[0096] The widths of the first coil 200 along different directions may be different, and the first coil 200 has a maximum width. Specifically, the first coil 200 has a maximum width in the first direction.

[0097] In the first direction, a first side of the first coil 200 is adjacent to the center line C, that is, one side of the first coil 200 along the maximum width direction is adjacent to the center line C. Therefore, the position where the width of the first coil 200 is smaller is distributed along the circumference of the bottom wall 140. In the circumference of the bottom wall 140, the first coil 200 occupies a smaller space, so that more first coils 200 can be distributed under the bottom wall 140, thereby increasing the coverage area of ​​the bottom wall 140 by at least two first coils 200, which is beneficial to increase the heating speed of the bottom wall 140, thereby improving the cooking efficiency of the rice-water mixture.

[0098] Combination Figure 2 and Figure 6 As shown, in some embodiments, optionally, the second side of the first coil 200 is bent toward the opening 130 , and the first side of the first coil 200 and the second side of the first coil 200 are two opposite sides of the first coil 200 .

[0099] Along the maximum width direction of the first coil 200 , the second side of the first coil 200 is bent toward the opening 130 , and the second side of the first coil 200 has a smaller width. In this case, only a small portion of the first coil 200 needs to be bent, thereby reducing the difficulty of winding the first coil 200 .

[0100] Exemplarily, in this embodiment, four evenly distributed first coils 200 are wound on the bottom coil disk 600, and the four first coils 200 are circumferentially distributed relative to the central axis of the bottom coil disk 600 (which is also the central axis of the pot body 100). Each first coil 200 is elliptical in shape, with a major axis L and a minor axis H. One end of the major axis of the first coil 200 is close to the central area of ​​the bottom coil disk 600, which is a horizontal part, and the other end of the major axis is close to the outer side of the bottom coil disk and bends inward toward the side coil.

[0101] like Figure 1 As shown, in some embodiments, optionally, the cooking device further includes: a thermostat 400 , the thermostat 400 is arranged opposite to the bottom wall 140 , and at least two first coils 200 are distributed along the circumference of the thermostat 400 .

[0102] Exemplarily, a bottom coil disk 600 is disposed at the bottom of the pot body 100, the first coil 200 is wound on the bottom coil disk 600, the thermostat 400 is assembled in the center hole of the bottom coil disk 600, and the thermostat 400 contacts the lower surface of the pot body 100, and the thermostat 400 is used to collect the temperature of the pot body 100, thereby controlling the operation of the first coil 200 and the second coil 300.

[0103] At least two first coils 200 are distributed along the circumference of the thermostat 400 , so that the temperature distribution around the thermostat 400 is uniform, thereby improving the accuracy of temperature acquisition by the thermostat 400 .

[0104] In the present invention, the term "plurality" means two or more than two, unless otherwise clearly defined. The terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0105] In the description of this specification, 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 utility model. In this specification, 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.

[0106] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A cooking device, characterized in that: include: A pot body, the pot body having an opening, a side wall and a bottom wall; At least two first coils are arranged opposite to the bottom wall, and the at least two first coils are spaced apart along the circumference of the bottom wall, and the projection of the side wall on the first plane where the first coils are located overlaps with at least a portion of the first coils, and a portion of the first coils overlapping with the projection of the side wall is bent toward the opening; Wherein, the magnetic field polarities of at least two of the first coils are the same.

2. The cooking device according to claim 1, characterized in that: The cooking device also includes: an excitation circuit, the excitation circuit being electrically connected to the first coil; One of two adjacent first coils is set as a first sub-coil, and the other is set as a second sub-coil; The first sub-coil and the second sub-coil have the same winding direction, and the connection mode of the input and output terminals of the first sub-coil to the positive output and negative output terminals of the excitation circuit is the same as the connection mode of the input and output terminals of the second sub-coil to the positive output and negative output terminals of the excitation circuit; Alternatively, the winding directions of the first sub-coil and the second sub-coil are opposite, and the connection method of the input and output terminals of the first sub-coil with the output positive pole and output negative pole of the excitation circuit is opposite to the connection method of the input and output terminals of the second sub-coil with the output positive pole and output negative pole of the excitation circuit.

3. The cooking device according to claim 2, characterized in that: The cooking device also includes: The second coil is located at the side of the pot body, the second coil is distributed along the circumference of the pot body, and the magnetic field polarity of the second coil is the same as that of the first coil.

4. The cooking device according to claim 3, characterized in that: The excitation circuit is also electrically connected to the second coil; The first coil and the second coil have the same winding direction, and the connection mode between the input and output terminals of the first coil and the output positive electrode and the output negative electrode of the excitation circuit is the same as the connection mode between the input and output terminals of the second coil and the output positive electrode and the output negative electrode of the excitation circuit; Alternatively, the winding directions of the first coil and the second coil are opposite, and the connection method of the input and output terminals of the first coil with the output positive pole and output negative pole of the excitation circuit is opposite to the connection method of the input and output terminals of the second coil with the output positive pole and output negative pole of the excitation circuit.

5. The cooking device according to claim 3, characterized in that: The pot body has a center line, and a portion of the first coil bent toward the opening along a direction perpendicular to the center line overlaps with a portion of the second coil.

6. The cooking device according to claim 3, characterized in that: The second coil includes a first portion, and a portion of the first coil bent toward the opening overlaps with the first portion; The pot body has a center line, a distance between a portion of the first coil bent toward the opening and the center line is L1, a distance between the first portion and the center line is L2, and L1>L2.

7. The cooking device according to claim 3, characterized in that: The first coil and the second coil are arranged at an interval.

8. The cooking device according to claim 3, characterized in that: At least two of the first coils are connected in series in sequence, and the first coil and the second coil are respectively connected to different excitation circuits; or At least two of the first coils are connected in series in sequence, and the second coil is connected in series with one of the first coils.

9. The cooking device according to claim 3, characterized in that: A plurality of turns of the second coil are formed on the pot body from the opening to the bottom wall; The pot body has a center line, the distance between the second coil and the center line is L3, the distance between the side wall of the pot body and the center line is L4, and L3 is positively correlated with L4.

10. The cooking device according to claim 1 or 2, characterized in that: The pot body has a center line. Along the extension direction of the center line, the distance between the first coil side adjacent to the pot body and the pot body is H1, and the distance between the first coil side away from the pot body and the pot body is H2, H2>H1.

11. The cooking device according to claim 1 or 2, characterized in that: The pot body has a center line, the width of the first coil is the largest along a first direction, and along the first direction, a first side of the first coil is adjacent to the center line.

12. The cooking device according to claim 11, characterized in that The second side of the first coil is bent toward the opening, and the first side of the first coil and the second side of the first coil are two opposite sides of the first coil.

13. The cooking device according to claim 1 or 2, characterized in that: The cooking device also includes: A temperature controller is arranged opposite to the bottom wall, and the temperature controller is located between at least two of the first coils.

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