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; the first coils are arranged at the bottom of the inner pot and face the inner pot, the number of the first coils is at least two, the at least two first coils are arranged in the circumferential direction of the inner pot at intervals, and the at least two first coils comprise first sub-coils and second sub-coils which are arranged adjacently; the current directions of adjacent positions of the first sub-coil and the second sub-coil are the same; wherein the minimum distance between the first coil and the inner pot is the first distance. By limiting the minimum distance between the bottom coil and the bottom of the inner pot, the power density of the bottom of the inner pot is further reduced, power concentration is avoided, and the heating uniformity of the inner pot 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] When the coil disk is set at the bottom of the cookware, the magnetic field strength generated by the coil changes with the distance. Since the distance between the bottom of the pot and the coil is closest, it is most affected by the magnetic field strength and generates the most heat. When the coil density is large, the bottom of the pot will heat up too quickly, which may cause the center temperature of the cooking cavity to not reach the standard, but cause the bottom to be burnt. 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, comprising: an inner pot; a first coil, the first coil is arranged at the bottom of the inner pot and is arranged toward the inner pot, the number of the first coils is at least two, at least two first coils are arranged at intervals along the circumference of the inner pot, and the at least two first coils include a first sub-coil and a second sub-coil arranged adjacently, and the current directions of the adjacent positions of the first sub-coil and the second sub-coil are the same; wherein the minimum distance between the first coil and the inner pot is the first distance.

[0007] In this technical solution, the cooking equipment includes but is not limited to rice cookers, electric soup cookers, electric pressure cookers and other cooking equipment, and the cooking equipment includes an inner pot and a first coil, and the first coil is arranged at the bottom of the inner pot and is arranged toward the inner pot.

[0008] Exemplarily, the inner pot can be a metal inner pot. The inner pot includes a first position, which specifically refers to the position where the inner pot is placed in the cavity of the cooking device and the inner pot is kept stable in the cavity. The first position is also the position of the inner pot when the cooking device is performing cooking work, that is, when the inner pot is heated by the first coil. At least two first coils are arranged at the bottom of the inner pot and are arranged at intervals along the circumference of the inner pot, so as to achieve a larger area covering the bottom wall of the inner pot. The first coil is electrically connected to the excitation circuit, and the excitation circuit can generate a magnetic field in the first coil by passing a current in a certain direction into the first coil. This part of the magnetic field will form a heating current on the inner pot, causing the inner pot to heat up and achieve heating and cooking of the ingredients. Exemplarily, the first coil is a multi-turn coil arranged in a coiled manner.

[0009] It is defined that any two adjacent coils of the at least two first coils are respectively a first sub-coil and a second sub-coil, and exemplary, the winding directions of the first sub-coil and the second sub-coil may be the same or different. Exemplarily, the first sub-coil and the second sub-coil are on the same plane.

[0010] The current directions at adjacent positions of the first sub-coil and the second sub-coil are the same, so that the magnetic fields generated at adjacent positions of the first sub-coil and the second sub-coil are in the same direction. Adjacent magnetic fields with the same directions will overlap with each other to a certain extent, thereby presenting a strong energy area between the first sub-coil and the second sub-coil. The heat in the strong energy area will flow to the weak energy area, thereby forming thermal convection.

[0011] When the inner pot is in the first position, the width of the gap between the first coil and the inner pot is the distance between the first coil and the inner pot. Exemplarily, when the cooking device is placed on a horizontal plane, at least two first coils are in the same plane, and the vertical distance between the plane where the first coils are located and the lowest point of the bottom of the inner pot is the first distance.

[0012] Since the current directions of adjacent positions of adjacent coils are the same, and the closer the inner pot is to the coil, the greater the magnetic field density generated by the coil and the stronger the magnetic field strength, the distance between the first coil and the bottom of the inner pot is reasonably adjusted to be limited to the first distance, so that the bottom wall of the inner pot is within a range of appropriate magnetic field strength, thereby reducing the problem of sticky bottom caused by excessive concentration of heating power at the bottom of the pot due to concentration of magnetic field intensity.

[0013] Exemplarily, the first distance ranges from 4 mm to 20 mm.

[0014] Exemplarily, the first distance is 10 mm.

[0015] Exemplarily, the first distance is 17 mm.

[0016] In the present application, when at least two first coils are arranged at the bottom of the inner pot, by limiting the minimum distance between the bottom coil and the bottom of the inner pot, the magnetic field strength of the multiple coils on the bottom wall of the inner pot can be reduced, thereby avoiding the problem of the bottom of the pot burning due to excessively rapid heating of the bottom.

[0017] In addition, the cooking device in the above technical solution provided by the present application may also have the following additional technical features:

[0018] In some technical solutions of the present application, optionally, the range of the first distance is: greater than or equal to 8 mm, and less than or equal to 17 mm.

[0019] In this technical solution, the first distance is the minimum distance between the first coil and the bottom of the inner pot. By limiting the minimum distance between the first coil and the bottom of the inner pot to between 8 mm and 17 mm, appropriate heating efficiency can be ensured while avoiding excessive concentration of power on the bottom of the pot.

[0020] Exemplarily, the first distance is 9 mm.

[0021] Exemplarily, the first distance is 12 mm.

[0022] Exemplarily, the first distance is 15 mm.

[0023] Exemplarily, the first distance is associated with the power of the first coil and / or the size of the inner pot.

[0024] In some technical solutions of the present application, optionally, the number of the first coils is at least 4, and the at least 4 first coils are evenly distributed in the circumferential direction of the inner pot.

[0025] In this technical solution, the number of the first coils is not less than 4. For example, the number of the first coils is 4, and the 4 first coils are arranged in a circle. Font distribution, at this time, each first coil has two other first coils located adjacently, and one first coil located oppositely.

[0026] The technical solution of the present application can improve heating uniformity by providing at least four first coils and distributing these first coils evenly in the circumferential direction of the inner pot.

[0027] In some technical solutions of the present application, optionally, the cooking device further includes: an excitation circuit, the excitation circuit being electrically connected to the first coil; wherein the first sub-coil and the second sub-coil satisfy:

[0028] The first sub-coil and the second sub-coil have the same winding direction, and the connection method of the input and output terminals of the first sub-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 sub-coil to the output positive and output negative poles of the excitation circuit; or, the first sub-coil and the second sub-coil have opposite winding directions, and the connection method of the input and output terminals of the first sub-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 sub-coil to the output positive and output negative poles of the excitation circuit.

[0029] In this technical solution, the second coil is wound around the circumference of the support assembly and is electrically connected to the excitation circuit, and is used to heat the inner pot from the side, wherein the excitation circuit can pass a current in a certain direction into the second coil, so that the second coil generates a magnetic field, and the magnetic field generated by the second coil can generate a heating current on the side wall of the inner pot, thereby causing the side wall of the inner pot to heat up. Exemplarily, the second coil covers at least half of the area of ​​the side wall of the inner pot.

[0030] Exemplarily, the second coil includes a plurality of single-turn coils evenly wound in the height direction of the inner pot.

[0031] Due to the principle of heat rising, the heating power of the bottom coil of the cooking device is generally higher than the heating power of the side wall coil, so that the first coil at the bottom is used as the main heating and the second coil at the side is used as the auxiliary heating.

[0032] In the present application, by setting the current directions of two adjacent coils in the first coil to be the same at adjacent positions, the magnetic fields generated at adjacent positions are in opposite directions, and adjacent magnetic fields with opposite polarities will be superimposed on each other to a certain extent, thereby forming a strong energy area between the two coils.

[0033] Since the current direction at adjacent positions in the first sub-coil and the second sub-coil is affected by the winding direction and the energizing direction of the coil, in order to achieve the above effect, a first winding direction is defined, which can be a clockwise direction or a counterclockwise direction. In the specified first winding direction, assuming that the winding methods of the first sub-coil and the second sub-coil are the same, the connection method between the input and output terminals of the first sub-coil and the positive and negative poles of the excitation circuit is opposite to the connection method between the input and output terminals of the second sub-coil and the positive and negative poles of the excitation circuit, that is, when the input terminal of the first sub-coil is electrically connected to the output positive pole of the excitation circuit and the output terminal is electrically connected to the output negative pole, the input terminal of the second sub-coil is electrically connected to the output negative pole of the excitation circuit and the output terminal is electrically connected to the output positive pole. When the input terminal of the first sub-coil is electrically connected to the output negative pole of the excitation circuit and the output terminal is electrically connected to the output positive pole, the input terminal of the second sub-coil is electrically connected to the output positive pole of the excitation circuit and the output terminal is electrically connected to the output negative pole.

[0034] Alternatively, in the specified first winding direction, if the winding methods of the first sub-coil and the second sub-coil are different, the connection methods of the in-line end and the out-line end of the first sub-coil to the positive and negative electrodes of the excitation circuit are the same as those of the in-line end and the out-line end of the second sub-coil to the positive and negative electrodes of the excitation circuit. That is, when the in-line end of the first sub-coil is electrically connected to the output positive electrode of the excitation circuit and the out-line end is electrically connected to the output negative electrode, the in-line end of the second sub-coil is also electrically connected to the output positive electrode of the excitation circuit and the out-line end is electrically connected to the output negative electrode. When the in-line end of the first sub-coil is electrically connected to the output negative electrode of the excitation circuit and the out-line end is electrically connected to the output positive electrode, the in-line end of the second sub-coil is also electrically connected to the output negative electrode of the excitation circuit and the out-line end is electrically connected to the output positive electrode.

[0035] Therefore, in the first winding direction, the connection methods of the adjacent first sub-coil and the second sub-coil to the output positive and negative electrodes of the excitation circuit are opposite, so that the current direction in the first sub-coil is opposite to the overall current direction in the second sub-coil, which can make the local current directions in the first sub-coil and the second sub-coil the same in the adjacent positions.

[0036] Exemplarily, the number of the first coils is 2, and the 2 first coils are distributed in a "Lv" shape.

[0037] Exemplarily, the number of the first coils is 3, and the 3 first coils are distributed in a "Pin" shape.

[0038] Exemplarily, the number of the first coils is 4, and the 4 first coils are in a shape distribution.

[0039] In the technical solution of the present application, by setting the current directions in the two adjacent first coils at the bottom to be opposite, it is possible to make the local currents in the adjacent positions of the two adjacent first coils the same, so that an energy strong area appears between the two adjacent coils, and the heat in the energy strong area will flow to the energy weak area, thus forming a heat convection.

[0040] In some technical solutions of the present application, optionally, the cooking device further includes: a second coil wound around the circumference of the inner pot; the diameter of the minimum circumscribed circle of at least two first coils is smaller than the diameter of the minimum circumscribed circle of the second coil.

[0041] In this technical solution, at least two first coils are on the same plane, and the diameter of the minimum circumscribed circle of at least two first coils is smaller than the diameter of the minimum circumscribed circle of the second coil. Since the second coil is a side heating coil and the size of the minimum circumscribed circle of the second coil is larger than the size of the inner pot, restricting the diameter of the minimum circumscribed circle of the first coil to be smaller than the diameter of the minimum circumscribed circle of the second coil can avoid setting the bottom heating coil beyond the range of the inner pot, avoid energy waste, and improve the energy utilization rate of the cooking device.

[0042] In some technical solutions of the present application, optionally, the cooking device also includes: a second coil, the second coil is wound around the circumference of the inner pot, the second coil includes a first turn and a second turn, the diameter of the first turn is greater than or equal to the diameter of the other turns in the second coil except the first turn, and the diameter of the second turn is less than or equal to the diameter of the other turns in the second coil except the second turn; the diameter of the minimum circumscribed circle of the first coil is smaller than the diameter of the first turn and larger than the diameter of the second turn.

[0043] In this technical solution, for some non-standard cylindrical inner pots, such as a spherical pot, the lower part of the pot body is in an inward-retracted hemispherical shape. At this time, the lower part of the bracket assembly is also in an inward-retracted shape along with the shape of the inner pot. In order to ensure the heating effect, the second coil is close to the side wall of the inner pot in the same trend. At this time, the diameter of the second coil near the inward-retracted area of ​​the lower part of the inner pot will be smaller than the diameter of the second coil near the area with the largest diameter in the middle of the inner pot.

[0044] Here, the turn with the largest diameter in the second coil is defined as the first turn, and the turn with the smallest diameter in the second coil is defined as the second turn. At this time, the diameter of the smallest circumscribed circle of the first coil is between the diameter of the first turn and the diameter of the second turn.

[0045] For a spherical kettle with a retracted bottom, since the shape of the bracket assembly cannot completely match the shape of the inner pot, the distance between the hemispherical area of ​​the lower half of the inner pot and the second coil is usually greater than the distance between the vertical side wall of the inner pot and the second coil, which results in a smaller heating power in the hemispherical area of ​​the inner pot and uneven heat distribution.

[0046] By setting the diameter of the minimum circumscribed circle of the first coil to be smaller than the diameter of the first wire turn with the largest diameter in the second coil, the heating range of the bottom coil can be prevented from exceeding the size of the inner pot, thereby reducing energy waste. At the same time, by setting the diameter of the minimum circumscribed circle of the first coil to be larger than the diameter of the second wire turn with the smallest diameter in the second coil, the first coil can cover the hemispherical area retracted inward of the inner pot and provide supplementary heating for the hemispherical area retracted inward of the inner pot, thereby making the heat distribution in the inner pot more uniform and improving the cooking effect of the cooking equipment.

[0047] In some technical solutions of the present application, optionally, the cooking device also includes: a bracket assembly, the bracket assembly includes a accommodating cavity, the opening of the accommodating cavity is located at the top of the bracket assembly, the bracket assembly includes: a first bracket, the first bracket includes a first winding portion, and the second coil is wound on the first winding portion; a second bracket, the second bracket is connected to the first bracket, the second bracket includes a second winding portion, and the first coil is wound on the second winding portion.

[0048] In this technical solution, a receiving cavity for placing the inner pot is formed inside the bracket assembly. Exemplarily, when the inner pot is placed at a preset position in the receiving cavity, the bracket assembly forms a semi-wrapped state for the inner pot, and the surrounding side walls of the bracket assembly at least cover more than half of the area of ​​the inner pot side walls.

[0049] The first position of the inner pot mentioned above specifically refers to placing the inner pot into the accommodating cavity of the bracket assembly and keeping the inner pot in a stable position in the accommodating cavity. This position is also the position of the inner pot when the cooking device is performing cooking, that is, when the inner pot is heated by the first coil.

[0050] The bracket assembly includes a first bracket and a second bracket, wherein the first bracket is a bowl-shaped structure, a receiving cavity is formed inside the first bracket, and the first bracket includes a plurality of layers of winding grooves, which are evenly distributed in the height direction of the first bracket, and a part of the winding grooves are located on the circumference of the inner pot, and another part of the winding grooves are located at the bottom of the inner pot.

[0051] Exemplarily, only one turn of coil is wound in the winding groove located on the peripheral side of the inner pot, and multiple turns of coil are wound in the winding groove located at the bottom of the inner pot.

[0052] The second bracket is arranged at the bottom of the first bracket and connected to the first bracket. Exemplarily, the second bracket can be connected to the bottom wall of the first bracket by a connecting member such as a bolt. Exemplarily, in some possible embodiments, the number of second brackets corresponds to the number of first coils, that is, a first coil is wound around each second bracket. Exemplarily, in other possible embodiments, the number of second brackets is not less than the number of first coils, that is, a plurality of second brackets are preset at the bottom of the first bracket, and the first coil is wound around several of the second brackets according to different models of cooking equipment, so that different models of cooking equipment can use the same bracket assembly.

[0053] The present application provides a first bracket and a second bracket, which are used to wind the second coil and the first coil respectively, which is helpful to reduce the assembly difficulty during the production and assembly of the cooking equipment and improve the production efficiency.

[0054] In some technical solutions of the present application, optionally, the first bracket and the second bracket are an integrated structure.

[0055] In this technical solution, the first bracket and the second bracket are integrally formed. Exemplarily, the first bracket and the second bracket are an integral plastic part. Exemplarily, the first bracket and the second bracket are an integral insulating plastic part. Exemplarily, the first bracket and the second bracket are an integral insulating flame retardant part.

[0056] In some embodiments, the number of the second stents is the same as the number of the first coils, thereby avoiding material waste.

[0057] In other embodiments, the number of second brackets is not less than the number of first coils. By designing redundant second brackets, when the number of first coils is subsequently adjusted or when other models of cooking equipment with more first coils are produced, there is no need to re-mold the bracket assembly, thereby improving the versatility of the product assembly.

[0058] The technical solution of the present application is to form the first bracket and the second bracket in one piece, which is convenient for production and helps to reduce product production costs.

[0059] In some technical solutions of the present application, optionally, the cooking device further includes: a base, the base includes a mounting column; the first bracket further includes a mounting portion, and the mounting portion is used to connect to the mounting column.

[0060] In the technical solution, the cooking device includes a base, and the bracket assembly is installed on the base. The base is provided with a mounting column, and exemplarily, the number of the mounting columns is at least 2. The first bracket is provided with a mounting portion corresponding to the mounting portion, and exemplarily, the top of the mounting portion 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.

[0061] Exemplarily, when the mounting portion is connected and installed 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.

[0062] The technical solution of the present application connects the base and the bracket assembly through the mounting portion, which is easy to assemble and can reserve sufficient installation and heat dissipation space for the coil assembly, which is beneficial to reducing the complexity of the assembly process of the cooking equipment.

[0063] 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.

[0064] In this technical solution, the cooking device includes a shell and a cover, wherein the bottom of 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.

[0065] The technical solution 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

[0066] 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:

[0067] Figure 1 A schematic structural diagram of a cooking device according to an embodiment of the present application is shown;

[0068] Figure 2 A schematic diagram showing the current direction of the first coil in some embodiments of the present application is shown;

[0069] Figure 3 A schematic diagram showing the structure of a cooking device in some embodiments of the present application;

[0070] Figure 4 for Figure 3 A cross-sectional view of the cooking device in the illustrated embodiment along the AA direction;

[0071] Figure 5 A schematic structural diagram of a cooking device according to an embodiment of the present application is shown.

[0072] Reference numerals:

[0073] 100 cooking device, 102 bracket assembly, 1022 accommodating cavity, 1024 opening, 1026 first bracket, 10262 mounting portion, 1028 second bracket, 104 second coil, 106 first coil, 107 excitation circuit, 1062 first sub-coil, 1064 second sub-coil, 108 base, 1082 mounting column, 110 shell, 112 cover, 114 inner pot, 116 first winding portion, 118 second winding portion. DETAILED DESCRIPTION

[0074] 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.

[0075] 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.

[0076] Refer to the following Figures 1 to 5 The cooking device provided according to some embodiments of the present application is described.

[0077] In some embodiments of the present application, a cooking device is provided. Figure 1 , Figure 3 and Figure 5 A schematic diagram showing the structure of a cooking device in some embodiments of the present application is shown. Figure 2 Schematic diagram showing the current direction of the first coil 106 in some embodiments of the present application, Figure 4 for Figure 3 The cross-sectional view of the cooking device 100 in the illustrated embodiment along the AA direction is shown in FIG. Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the cooking device 100 comprises:

[0078] Inner pot 114; a first coil 106, wherein the first coil 106 is disposed at the bottom of the inner pot 114 and is disposed toward the inner pot 114, the number of the first coils 106 is multiple, at least two first coils 106 are disposed at intervals along the circumference of the inner pot 114, the at least two first coils 106 include a first sub-coil 1062 and a second sub-coil 1064 disposed adjacently, and the current directions of the first sub-coil 1062 and the second sub-coil 1064 at adjacent positions are the same; wherein the minimum distance between the first coil 106 and the inner pot 114 is the first distance.

[0079] In this embodiment, Figure 2 Arrow B in the figure shows the circumference of the inner pot 114. The cooking device 100 includes but is not limited to cooking devices 100 such as rice cookers, electric soup cookers and electric pressure cookers. The cooking device 100 includes an inner pot 114 and a first coil 106. The first coil 106 is arranged at the bottom of the inner pot 114 and is arranged toward the inner pot 114.

[0080] Exemplarily, the inner pot 114 may be a metal inner pot. The inner pot 114 includes a first position, which specifically refers to a position where the inner pot 114 is placed in the cavity of the cooking device and keeps the inner pot 114 stable in the cavity. The first position is also the position of the inner pot 114 when the cooking device 100 performs cooking, that is, when the inner pot 114 is heated by the second coil 104 and the first coil 106.

[0081] At least two first coils 106 are arranged at the bottom of the inner pot and are arranged at intervals along the circumference of the inner pot, so as to achieve a larger area covering the bottom wall of the inner pot. The first coil 106 is electrically connected to the excitation circuit, and the excitation circuit can pass a current in a certain direction into the first coil 106, so that the first coil 106 generates a magnetic field, and this part of the magnetic field will form a heating current on the inner pot, causing the inner pot to heat up, and achieve heating and cooking of the food. Exemplarily, the first coil 106 is a multi-turn coil arranged in a coiled manner.

[0082] Any two adjacent coils of the at least two first coils 106 are defined as a first sub-coil 1062 and a second sub-coil 1064. For example, the winding directions of the first sub-coil 1062 and the second sub-coil 1064 may be the same or different. For example, the first sub-coil 1062 and the second sub-coil 1064 are located on the same plane.

[0083] Figure 2 Arrow I 1 shows the local current direction in the first sub-coil 1062, Figure 2 Arrow I 2 The local current direction in the second sub-coil 1064 is shown as Figure 2 As shown, the current directions at adjacent positions of the first sub-coil 1062 and the second sub-coil 1064 are the same, so that the magnetic fields generated at adjacent positions of the first sub-coil 1062 and the second sub-coil 1064 are in the same direction, and adjacent magnetic fields with the same direction will overlap with each other to a certain extent, thereby presenting a strong energy area between the first sub-coil 1062 and the second sub-coil 1064, and the heat in the strong energy area will flow to the weak energy area, thereby forming heat convection.

[0084] When the inner pot 114 is in the first position, the width of the gap between the first coil 106 and the inner pot 114 is the distance between the first coil 106 and the inner pot 114. Exemplarily, when the cooking device is placed on a horizontal plane, at least two first coils 106 are in the same plane, and the vertical distance between the plane where the first coils 106 are located and the lowest point of the bottom of the inner pot 114 is the first distance. Figure 4 The h shown in is the above-mentioned first distance.

[0085] Since the current directions of adjacent positions of adjacent coils are the same, and the closer the inner pot 114 is to the coil, the greater the magnetic field density generated by the coil and the stronger the magnetic field strength, the distance between the first coil and the bottom of the inner pot 114 is reasonably adjusted to be limited to the first distance, so that the bottom wall of the inner pot is within a range of appropriate magnetic field strength, thereby reducing the problem of sticky bottom caused by excessive concentration of heating power at the bottom of the pot due to concentration of magnetic field strength.

[0086] Exemplarily, the first distance ranges from 4 mm to 20 mm.

[0087] Exemplarily, the first distance is 10 mm.

[0088] Exemplarily, the first distance is 17 mm.

[0089] In the present application, when at least two first coils 106 are arranged at the bottom of the inner pot 114, by limiting the minimum distance between the bottom coil and the bottom of the inner pot, the magnetic field strength of the multiple coils on the bottom wall of the inner pot 114 can be reduced, thereby avoiding the problem of the bottom of the pot burning due to excessively rapid heating.

[0090] In some embodiments of the present application, optionally, the range of the first distance is: greater than or equal to 8 mm, and less than or equal to 17 mm.

[0091] In this embodiment, the first distance is the minimum distance between the first coil 106 and the bottom of the inner pot 114. By limiting the minimum distance between the first coil 106 and the bottom of the inner pot 114 to between 8 mm and 17 mm, appropriate heating efficiency can be ensured while avoiding excessive concentration of power on the bottom of the pot.

[0092] Exemplarily, the first distance is 9 mm.

[0093] Exemplarily, the first distance is 12 mm.

[0094] Exemplarily, the first distance is 15 mm.

[0095] Exemplarily, the first distance is associated with the power of the first coil 106 and / or the size of the inner pot 114 .

[0096] In some embodiments of the present application, optionally, the number of the first coils 106 is at least 4, and the at least 4 first coils 106 are evenly distributed in the circumferential direction of the inner pot 114 .

[0097] In this embodiment, the number of the first coils 106 is not less than 4. For example, the number of the first coils 106 is 4, and the 4 first coils 106 are arranged in a circle. In the font distribution, each first coil 106 has two other first coils 106 adjacent to each other and one first coil 106 opposite to each other.

[0098] The embodiment of the present application can improve heating uniformity by providing at least four first coils 106 and distributing these first coils 106 evenly in the circumferential direction of the inner pot 114 .

[0099] In some technical schemes of the present application, optionally, the cooking device 100 also includes: an excitation circuit 107, which is electrically connected to the first coil 106; wherein the first sub-coil 1062 and the second sub-coil 1064 satisfy: the winding directions of the first sub-coil 1062 and the second sub-coil 1064 are the same, and the connection method of the input and output terminals of the first sub-coil 1062 to the output positive and output negative poles of the excitation circuit 107 is opposite to the connection method of the input and output terminals of the second sub-coil 1064 to the output positive and output negative poles of the excitation circuit 107; or, the winding directions of the first sub-coil 1062 and the second sub-coil 1064 are opposite, and the connection method of the input and output terminals of the first sub-coil 1062 to the output positive and output negative poles of the excitation circuit 107 is the same as the connection method of the input and output terminals of the second sub-coil 1064 to the output positive and output negative poles of the excitation circuit 107.

[0100] In this embodiment, the second coil 104 is wound around the circumference of the support assembly 102 and is electrically connected to the excitation circuit 107, and is used to heat the inner pot 114 from the side, wherein the excitation circuit 107 can make the second coil 104 generate a magnetic field by passing a current in a certain direction into the second coil 104, and the magnetic field generated by the second coil 104 can generate a heating current on the side wall of the inner pot 114, thereby causing the side wall of the inner pot 114 to heat up. Exemplarily, the second coil 104 covers at least half of the area of ​​the side wall of the inner pot 114.

[0101] At least two first coils 106 are arranged at the bottom of the support assembly 102 and are arranged at intervals along the circumference of the support assembly 102, so as to achieve a larger area covering the bottom wall of the inner pot 114. The first coil 106 is electrically connected to the excitation circuit 107. The excitation circuit 107 can pass a current in a certain direction into the first coil 106, so that the first coil 106 generates a magnetic field. This part of the magnetic field will form a heating current on the inner pot 114, causing the inner pot 114 to heat up, thereby achieving heating and cooking of the food.

[0102] Exemplarily, the second coil 104 includes a plurality of single-turn coils uniformly wound in the height direction of the inner pot 114. Exemplarily, the first coil 106 is a multi-turn coil wound in a spiral arrangement.

[0103] Due to the principle of heat rising, the heating power of the bottom coil of the cooking device 100 is generally higher than the heating power of the side wall coil, so that the first coil 106 at the bottom is used as the main heating and the second coil 104 at the side is used as the auxiliary heating.

[0104] In the present application, by setting the current directions of two adjacent coils in the first coil to be the same at adjacent positions, the magnetic fields generated at adjacent positions are in opposite directions, and adjacent magnetic fields with opposite polarities will be superimposed on each other to a certain extent, thereby forming a strong energy area between the two coils.

[0105] Since the current direction of the adjacent positions in the first sub-coil 1062 and the second sub-coil 1064 is affected by the coil winding direction and the energization direction, in order to achieve the above effect, a first winding direction is defined, and the first winding direction can be clockwise or counterclockwise. Any two adjacent coils in at least two first coils 106 are defined as the first sub-coil 1062 and the second sub-coil 1064, respectively. Exemplarily, the winding directions of the first sub-coil 1062 and the second sub-coil 1064 can be the same or different. Exemplarily, the first sub-coil 1062 and the second sub-coil 1064 are on the same plane.

[0106] Figure 2 The arrow in shows the direction of the current in the first coil 106. In the specified first winding direction, assuming that the winding methods of the first sub-coil 1062 and the second sub-coil 1064 are the same, the connection method of the input and output terminals of the first sub-coil 1062 to the positive and negative poles of the excitation circuit 107 is opposite to the connection method of the input and output terminals of the second sub-coil 1064 to the positive and negative poles of the excitation circuit 107, that is, when the input terminal of the first sub-coil 1062 is electrically connected to the output positive pole of the excitation circuit 107 and the output terminal is electrically connected to the output negative pole, the input terminal of the second sub-coil 1064 is electrically connected to the output negative pole of the excitation circuit 107 and the output terminal is electrically connected to the output positive pole. When the input terminal of the first sub-coil 1062 is electrically connected to the output negative pole of the excitation circuit 107 and the output terminal is electrically connected to the output positive pole, the input terminal of the second sub-coil 1064 is electrically connected to the output positive pole of the excitation circuit 107 and the output terminal is electrically connected to the output negative pole.

[0107] Alternatively, in the specified first winding direction, assuming that the winding methods of the first sub-coil 1062 and the second sub-coil 1064 are different, the connection method of the input and output terminals of the first sub-coil 1062 to the positive and negative poles of the excitation circuit 107 is the same as the connection method of the input and output terminals of the second sub-coil 1064 to the positive and negative poles of the excitation circuit 107, that is, when the input terminal of the first sub-coil 1062 is electrically connected to the output positive pole of the excitation circuit 107 and the output terminal is electrically connected to the output negative pole, the input terminal of the second sub-coil 1064 is also electrically connected to the output positive pole of the excitation circuit 107, and the output terminal is electrically connected to the output negative pole. When the input terminal of the first sub-coil 1062 is electrically connected to the output negative pole of the excitation circuit 107 and the output terminal is electrically connected to the output positive pole, the input terminal of the second sub-coil 1064 is also electrically connected to the output negative pole of the excitation circuit 107, and the output terminal is electrically connected to the output positive pole.

[0108] Therefore, in the first winding direction, the connection modes of the adjacent first sub-coils 1062 and second sub-coils 1064 to the positive and negative outputs of the excitation circuit 107 are opposite, so that the current directions in the first sub-coils 1062 and the overall current directions in the second sub-coils 1064 are opposite, which can make the local current directions in the first sub-coils 1062 and the second sub-coils 1064 the same at adjacent positions.

[0109] Exemplarily, the number of the first coils 106 is two, and the two first coils 106 are distributed in an "L" shape.

[0110] Exemplarily, the number of the first coils 106 is three, and the three first coils 106 are distributed in a "pin" shape.

[0111] Exemplarily, the number of the first coils 106 is four, and the four first coils 106 are distributed in a [shape].

[0112] In the embodiment of the present application, by setting the current directions in two adjacent first coils 106 at the bottom to be opposite, the adjacent first coils 106 generate magnetic fields with opposite directions. Through the mutual cancellation effect between the adjacent magnetic fields with opposite directions, the power density on the bottom of the pot is reduced, and the problem that the heating power is overly concentrated on the bottom of the pot is solved.

[0113] In some embodiments of the present application, optionally, the cooking device 100 further includes: a second coil 104 wound around the periphery of the inner pot 114; the diameter of the minimum circumscribed circle of at least two first coils 106 is smaller than the diameter of the minimum circumscribed circle of the second coil 104.

[0114] In this embodiment, at least two first coils 106 are on the same plane, and the diameter of the minimum circumscribed circle of at least two first coils 106 is smaller than the diameter of the minimum circumscribed circle of the second coil 104. Since the second coil 104 is a side heating coil, the size of the minimum circumscribed circle of the second coil 104 is larger than the size of the inner pot 114. Therefore, restricting the diameter of the minimum circumscribed circle of the first coils 106 to be smaller than the diameter of the minimum circumscribed circle of the second coil 104 can avoid arranging the bottom heating coils beyond the range of the inner pot 114, avoid energy waste, and improve the energy utilization rate of the cooking device 100.

[0115] In some embodiments of the present application, optionally, the cooking device 100 also includes: a second coil 104, the second coil 104 is wound around the circumference of the inner pot 114, the second coil 104 includes a first turn and a second turn, the diameter of the first turn is greater than or equal to the diameter of the other turns in the second coil 104 except the first turn, and the diameter of the second turn is less than or equal to the diameter of the other turns in the second coil 104 except the second turn; the diameter of the minimum circumscribed circle of the first coil 106 is smaller than the diameter of the first turn and larger than the diameter of the second turn.

[0116] In this embodiment, for some non-standard cylindrical inner pots 114, such as a spherical pot, the lower part of the pot body is in an inward-retracted hemispherical shape. At this time, the lower part of the bracket assembly 102 is also in an inward-retracted shape along with the shape of the inner pot 114. In order to ensure the heating effect, the second coil 104 follows the same trend and is close to the side wall of the inner pot 114. At this time, the diameter of the second coil 104 near the inward-retracted area of ​​the lower part of the inner pot 114 will be smaller than the diameter of the second coil 104 near the area with the largest diameter in the middle of the inner pot 114.

[0117] Here, the turn with the largest diameter in the second coil 104 is defined as the first turn, and the turn with the smallest diameter in the second coil 104 is defined as the second turn. At this time, the diameter of the smallest circumscribed circle of the first coil 106 is between the diameters of the first turn and the second turn.

[0118] For a spherical kettle with a retracted bottom, since the shape of the bracket assembly 102 cannot completely match the shape of the inner pot 114, the distance between the hemispherical area of ​​the lower half of the inner pot 114 and the second coil 104 is usually greater than the distance between the vertical side wall of the inner pot 114 and the second coil 104, which results in a smaller heating power in the hemispherical area of ​​the inner pot 114 and uneven heat distribution.

[0119] By setting the diameter of the minimum circumscribed circle of the first coil 106 to be smaller than the diameter of the first wire turn with the largest diameter in the second coil 104, it is possible to avoid the heating range of the bottom coil from exceeding the size of the inner pot 114, thereby reducing energy waste. At the same time, by setting the diameter of the minimum circumscribed circle of the first coil 106 to be larger than the diameter of the second wire turn with the smallest diameter in the second coil 104, the first coil 106 can cover the hemispherical area retracted inwardly of the inner pot 114, and perform supplementary heating on the hemispherical area retracted inwardly of the inner pot 114, thereby making the heat distribution of the inner pot 114 more uniform, thereby improving the cooking effect of the cooking device 100.

[0120] In some embodiments of the present application, optionally, Figure 1 and Figure 5As shown, the cooking device also includes: a bracket assembly 102, the bracket assembly 102 includes a accommodating cavity 1022, the opening of the accommodating cavity 1022 is located at the top of the bracket assembly 102, and the bracket assembly 102 includes: a first bracket 1026, the first bracket 1026 includes a first winding portion 116, and the second coil 104 is wound on the first winding portion 116; a second bracket 1028, the second bracket 1028 is connected to the first bracket 1026, the second bracket 1028 includes a second winding portion 118, and the first coil 106 is wound on the second winding portion 118.

[0121] In this embodiment, a accommodating cavity 1022 for placing the inner pot 114 is formed inside the support assembly 102. Exemplarily, when the inner pot 114 is placed at a preset position in the accommodating cavity 1022, the support assembly 102 forms a semi-wrapped state for the inner pot 114, and at this time, the peripheral side walls of the support assembly 102 cover at least more than half of the area of ​​the side walls of the inner pot 114.

[0122] The first position of the inner pot 114 mentioned above specifically refers to placing the inner pot 114 into the accommodating cavity 1022 of the bracket assembly 102 and keeping the inner pot 114 in a stable position in the accommodating cavity 1022. This position is also the position of the inner pot 114 when the cooking device is performing cooking, that is, when the inner pot 114 is heated by the first coil.

[0123] The bracket assembly 102 includes a first bracket 1026 and a second bracket 1028, wherein the first bracket 1026 is a bowl-shaped structure, and a accommodating cavity 1022 is formed inside the first bracket 1026. The first bracket 1026 includes a plurality of winding grooves, and the plurality of winding grooves are evenly distributed in the height direction of the first bracket 1026, and a part of the winding grooves are located on the peripheral side of the inner pot 114, and another part of the winding grooves are located at the bottom of the inner pot 114.

[0124] Exemplarily, only one turn of coil is wound in the winding groove located on the peripheral side of the inner pot 114 , and multiple turns of coil are wound in the winding groove located at the bottom of the inner pot 114 .

[0125] The second bracket 1028 is disposed at the bottom of the first bracket 1026 and connected to the first bracket 1026. Exemplarily, the second bracket 1028 can be connected to the bottom wall of the first bracket by a connecting member such as a bolt. Exemplarily, in some possible embodiments, the number of the second brackets 1028 corresponds to the number of the first coils 106, that is, one first coil 106 is wound around each second bracket 1028. Exemplarily, in other possible embodiments, the number of the second brackets 1028 is not less than the number of the first coils 106, that is, a plurality of second brackets 1028 are preset at the bottom of the first bracket 1026, and the first coil 106 is wound around a plurality of the second brackets 1028 according to different models of the cooking device 100, so that different models of cooking devices 100 can use the same bracket assembly 102.

[0126] The present application provides a first bracket 1026 and a second bracket 1028 for winding the second coil 104 and the first coil 106 respectively, which is helpful to reduce the assembly difficulty during the production and assembly of the cooking device 100 and improve the production efficiency.

[0127] In some embodiments of the present application, optionally, the first bracket 1026 and the second bracket 1028 are an integrated structure.

[0128] In this embodiment, the first bracket 1026 and the second bracket 1028 are integrally formed. Exemplarily, the first bracket 1026 and the second bracket 1028 are an integral plastic part. Exemplarily, the first bracket 1026 and the second bracket 1028 are an integral insulating plastic part. Exemplarily, the first bracket 1026 and the second bracket 1028 are an integral insulating flame retardant part.

[0129] In some embodiments, the number of the second brackets 1028 is the same as the number of the first coils 106 , thereby avoiding material waste.

[0130] In other embodiments, the number of second brackets 1028 is not less than the number of first coils 106. By designing redundant second brackets 1028, when the number of first coils 106 is subsequently adjusted, or when other models of cooking devices 100 with more first coils 106 are produced, there is no need to re-design the mold of the bracket assembly 102, which can improve the versatility of the product assembly.

[0131] The embodiment of the present application provides the first bracket 1026 and the second bracket 1028 to be integrally formed, which is convenient for production and helps to reduce product production costs.

[0132] In some embodiments of the present application, optionally, Figure 1 and Figure 5As shown, the cooking device 100 further includes: a base 108 , the base 108 includes a mounting column 1082 ; the first bracket 1026 further includes a mounting portion 10262 , and the mounting portion 10262 is used to connect to the mounting column 1082 .

[0133] In this embodiment, the cooking device 100 includes a base 108, and the bracket assembly 102 is mounted on the base 108. The base 108 is provided with mounting posts 1082, and illustratively, the number of mounting posts 1082 is at least 2. The first bracket is provided with a mounting portion 10262 corresponding to the mounting portion 10262, and illustratively, the top of the mounting portion 10262 includes a screw hole, and the mounting portion 10262 includes a through hole. During assembly, a bolt is passed through the through hole of the mounting portion 10262 and then screwed to the screw hole of the mounting post 1082, thereby fixing the bracket assembly 102 on the base 108.

[0134] Exemplarily, when the mounting portion 10262 is connected and installed with the mounting column 1082, a gap is left between the bracket assembly 102 and the body of the base 108, thereby preventing the bottom coil from contacting the base 108 and reserving heat dissipation space for the bottom coil.

[0135] The embodiment of the present application connects the base 108 and the bracket assembly 102 via the mounting portion 10262 , 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 .

[0136] In some embodiments of the present application, optionally, Figure 1 and Figure 5 As shown, the cooking device 100 further includes: a shell 110 , which is connected to the base 108 , and the bracket assembly 102 is located in the shell 110 ; and a cover 112 , which is connected to the shell 110 in an openable and closable manner.

[0137] In this embodiment, the cooking device 100 includes a housing 110 and a cover 112, wherein the bottom of the housing 110 is connected to the base 108, and the housing 110 and the base 108 enclose a mounting cavity, and the bracket assembly 102 is disposed in the mounting cavity. The cover 112 is connected to the top of the housing 110 in an openable and closable manner. When the cover 112 is in an open state, the opening 1024 of the accommodating cavity 1022 is exposed, and the user can take and place the inner pot 114. When the cover 112 is in a closed state, the opening 1024 of the accommodating cavity 1022 is covered by the cover 112. At this time, if the inner pot 114 is at a preset position of the accommodating cavity 1022, the inner pot 114 is also in a closed state.

[0138] In the embodiment of the present application, a shell 110 and a cover 112 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 .

[0139] 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.

[0140] 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.

[0141] 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: Inner pot; a first coil, the first coil being arranged at the bottom of the inner pot and facing the inner pot, the number of the first coils being at least two, the at least two first coils being arranged at intervals along the circumference of the inner pot, the at least two first coils comprising a first sub-coil and a second sub-coil being arranged adjacently, and the current directions of the first sub-coil and the second sub-coil at adjacent positions being the same; Wherein, the minimum distance between the first coil and the inner pot is the first distance.

2. The cooking device according to claim 1, characterized in that: The range of the first distance is: greater than or equal to 8 mm and less than or equal to 17 mm.

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

4. The cooking device according to claim 1, characterized in that: Also includes: an excitation circuit, the excitation circuit being electrically connected to the first coil; Wherein, the first sub-coil and the second sub-coil satisfy: 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 opposite to 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 between the input and output terminals of the first sub-coil and the output positive pole and output negative pole of the excitation circuit is the same as the connection method between the input and output terminals of the second sub-coil and the output positive pole and output negative pole of the excitation circuit.

5. The cooking device according to claim 4, characterized in that: Also includes: a second coil, the second coil being wound around the circumference of the inner pot; The diameter of the minimum circumscribed circle of at least two of the first coils is smaller than the diameter of the minimum circumscribed circle of the second coil.

6. The cooking device according to claim 4, characterized in that Also includes: a second coil, the second coil being wound around the circumference of the inner pot, the second coil comprising a first wire turn and a second wire turn, the diameter of the first wire turn being greater than or equal to the diameter of the other wire turns in the second coil except the first wire turn, and the diameter of the second wire turn being less than or equal to the diameter of the other wire turns in the second coil except the second wire turn; The diameter of the minimum circumscribed circle of the first coil is smaller than the diameter of the first turn and larger than the diameter of the second turn.

7. The cooking device according to claim 5 or 6, characterized in that: Also includes: A bracket assembly, wherein the bracket assembly includes a receiving cavity, wherein the opening of the receiving cavity is located at the top of the bracket assembly, and the bracket assembly includes: a first bracket, the first bracket comprising a first winding portion, the second coil being wound around the first winding portion; The second bracket is connected to the first bracket, the second bracket includes a second winding portion, and the first coil is wound around the second winding portion.

8. The cooking device according to claim 7, characterized in that The first bracket and the second bracket are an integrated structure.

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

10. The cooking device according to claim 9, 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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