Cooking apparatus

Abstract

The utility model discloses a kind of cooking equipment, and cooking equipment includes cooking main body and cover body component. Cooking main body includes base, cooking pot and heating device, and heating device includes first excitation coil, base has the installation area of first excitation coil, magnet is not set between first excitation coil and installation area, first excitation coil includes multiple coil groups, multiple coil groups are arranged at the radial direction of an imaginary circle with interval, the interval of adjacent two coil groups is greater than 12mm. According to the cooking equipment of the utility model embodiment, by optimizing the structure of first excitation coil, the degree of magnetic force line concentrated distribution can be reduced, the leakage magnetic phenomenon can be reduced without setting magnet, on the basis of guaranteeing the heating effect of heating device to cooking pot, the number of components can be reduced, production steps are simplified, production efficiency is improved, production cost is reduced, and the lightweight design of cooking equipment is realized.

Description

Technical Field

[0001] This utility model relates to the field of cooking technology, and in particular to a cooking device. Background Technology

[0002] In related technologies, the electromagnetic heating device of cooking equipment includes a coil and a magnet. Although it can achieve electromagnetic heating, the large number of components leads to complex production steps and increases production costs. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, one objective of the present invention is to provide a cooking device with fewer components, which simplifies production steps, improves production efficiency, reduces production costs, and facilitates lightweight design.

[0004] A cooking device according to an embodiment of the present invention includes a cooking body and a lid assembly. The cooking body includes a base, a cooking pot, and a heating device. The cooking pot is disposed above the base. The heating device is used to heat the cooking pot and includes a first excitation coil. The lid assembly is disposed on the cooking body and is used to open and close the opening of the cooking pot. The base has a mounting area for the first excitation coil, which is located between the mounting area and the bottom wall of the cooking pot. No magnet is disposed between the first excitation coil and the mounting area. The first excitation coil includes multiple coil groups, which are arranged radially at intervals in an imaginary circle. The distance between two adjacent coil groups is greater than 12 mm. The center of the imaginary circle is located on the central axis of the first excitation coil, and the imaginary circle is located on a plane perpendicular to the central axis.

[0005] According to the embodiments of the present invention, the cooking device can reduce the degree of magnetic field concentration by optimizing the structure of the first excitation coil, and reduce magnetic leakage without setting a magnet. While ensuring the heating effect of the heating device on the cooking pot, it can reduce the number of parts, simplify the production steps, improve production efficiency, reduce production costs, and achieve a lightweight design of the cooking device.

[0006] In some embodiments, the plurality of coil groups are arranged at equal intervals in the radial direction of the imaginary circle; or, in the plurality of coil groups, the distance between two adjacent coil groups gradually decreases from the inside to the outside in the radial direction of the imaginary circle.

[0007] In some embodiments, the area in which the projection of each coil group falls on the bottom wall of the cooking pot is annular.

[0008] In some examples, among the multiple coil groups, the projection of the outermost coil group onto the bottom wall of the cooking pot forms an annular region. The diameter of the outer contour of this annular region is greater than or equal to 140 mm; and / or, the ratio of the area enclosed by the outer contour of the annular region to the surface area of ​​the bottom wall of the cooking pot is greater than or equal to 2 / 3.

[0009] In some specific examples, each coil group includes a plurality of first coil segments connected end to end and coiled from the inside to the outside in the radial direction of the imaginary circle, with the plurality of first coil segments at least partially arranged in the radial direction of the imaginary circle.

[0010] In some specific examples, the distance between two adjacent coil groups in the radial direction of the imaginary circle is L1, and in a single coil group, the distance between two adjacent first coil segments in the radial direction of the imaginary circle is L2, and the ratio of L1 to L2 is greater than 5.

[0011] In some embodiments, the cooking body further includes a support member disposed above the base and defining a receiving cavity in which the cooking pot is disposed. The support member has multiple mounting slots on its side facing the base, and multiple first coil segments are embedded in the multiple mounting slots.

[0012] In some embodiments, a plurality of the coil groups are connected in series, and in each coil group a plurality of the first coil segments are connected in series.

[0013] In some specific embodiments, the cooking device further includes a magnetic shielding component, which is disposed between the first excitation coil and the mounting area. The magnetic shielding component is disc-shaped, and the center of the magnetic shielding component is located on the central axis of the first excitation coil. Alternatively, no magnetic shielding element may be provided between the first excitation coil and the mounting area.

[0014] In some embodiments, the heating device further includes a second excitation coil, which is positioned corresponding to the peripheral wall of the cooking pot and is coiled from bottom to top along the height direction of the cooking pot.

[0015] In some specific embodiments, the cooking body includes a support member and a shell. The support member is disposed above the base and defines a receiving cavity. The cooking pot is disposed in the receiving cavity. The shell is fitted over the outside of the support member and connected to the base. The first excitation coil is disposed on the side of the support member facing the base, and the second excitation coil is disposed on the side of the support member facing the shell.

[0016] In some embodiments, the cooking body further includes a circuit board assembly placed upright on the periphery of the cooking pot and located between the support and the outer shell.

[0017] In some embodiments, the first excitation coil and the second excitation coil are connected in series.

[0018] According to some embodiments of the present invention, the cooking device is a rice cooker or a pressure cooker; and / or, the heating power of the cooking device is less than 1500W.

[0019] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a perspective view of a cooking device according to an embodiment of the present utility model; Figure 2 This is a structural cross-sectional view of the cooking device according to an embodiment of the present utility model; Figure 3 This is an exploded view of a cooking device according to an embodiment of the present utility model; Figure 4 This is an exploded view of the cooking device according to an embodiment of the present invention from another perspective; Figure 5 yes Figure 4 Enlarged view of part A in the image; Figure 6 yes Figure 4 The heating device shown is shown in a bottom view. Figure 7 yes Figure 6 Enlarged view of part B in the image; Figure 8 yes Figure 4 A three-dimensional view of the heating device shown.

[0021] Figure label: 100 cooking equipment; Cooking Main Body 10; Base 11; Mounting area 11a; Cooking pot 12; Pot opening 12a; Bottom wall 121; Peripheral wall 122; Heating device 13; First excitation coil 131; Coil group 1311; First coil segment 13111; Second excitation coil 132; Second coil segment 1321; Support member 14; receiving cavity 14a; mounting groove 14b; limiting member 14b1; heating plate bracket 141; horizontal extension 1411; arc-shaped extension 1412; mounting cylinder 142; opening 142a; 15. Housing; 16. Circuit board assembly; Cover assembly 20; magnetic shielding component 30. Detailed Implementation

[0022] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0023] The following is for reference. Figures 1-8 A cooking apparatus 100 according to an embodiment of the present utility model is described.

[0024] Reference Figure 1 and Figure 2 The cooking device 100 according to an embodiment of the present invention includes a cooking body 10 and a lid assembly 20.

[0025] The cooking body 10 includes a base 11, a cooking pot 12 and a heating device 13. The cooking pot 12 is located above the base 11, and the heating device 13 is used to heat the cooking pot 12. The lid assembly 20 is located on the cooking body 10 and is used to open and close the pot opening 12a of the cooking pot 12.

[0026] Reference Figure 3 and Figure 4 The heating device 13 includes a first excitation coil 131. The base 11 has a mounting area 11a for the first excitation coil 131. The first excitation coil 131 is located between the mounting area 11a and the bottom wall 121 of the cooking pot 12. No magnet is provided between the first excitation coil 131 and the mounting area 11a.

[0027] Here, "installation area 11a" refers to the area where the projection of the first excitation coil 131 is located on the plane of the base 11. No magnet is installed in the installation area 11a, but it is not excluded that there may be a magnet or other components containing a magnet outside the installation area 11a.

[0028] Specifically, refer to Figure 4The first excitation coil 131 includes multiple coil groups 1311, which are arranged at intervals in the radial direction of an imaginary circle. In the description of this utility model, "multiple" means two or more. The distance L1 between two adjacent coil groups 1311 is greater than 12 mm. The center of the imaginary circle is located on the central axis of the first excitation coil 131, and the imaginary circle is located on a plane perpendicular to the central axis. For example, the distance L1 between two adjacent coil groups 1311 can be 12 mm, 15 mm, 20 mm, 25 mm, etc.

[0029] Taking the plane where the first excitation coil 131 is located as the reference plane, the reference plane is perpendicular to the height direction of the cooking pot 12 (i.e. Figure 2 (F1 direction in the middle). When the cooking device 100 is working, the first excitation coil 131 is supplied with a high-frequency current, which causes the multiple coil groups 1311 of the first excitation coil 131 to undergo electromagnetic induction, generating magnetic fields of equal magnetic induction intensity on the upper and lower sides of the reference plane. The magnetic field on the upper side of the reference plane acts on the cooking pot 12, causing eddy currents to be generated on the cooking pot 12, thereby generating heat in the cooking pot 12, and thus heating the food inside the cooking pot 12.

[0030] Since the first excitation coil 131 is located between the mounting area 11a and the bottom wall 121 of the cooking pot 12, the magnetic field on the lower side of the reference plane will not act on the cooking pot 12, that is, a magnetic leakage phenomenon will occur, which may have a potential impact on other components of the base 11 of the cooking device 100 or on human health.

[0031] In conventional cooking equipment 100, a magnet (such as ferrite) is typically placed between the first excitation coil 131 and the mounting area 11a. This serves two purposes: firstly, it enhances magnetic field coupling efficiency, improving the heating performance of the first excitation coil 131; secondly, it suppresses magnetic field leakage at the bottom of the first excitation coil 131, preventing potential impacts on other components of the cooking equipment 100 or human health. However, placing a magnet not only increases the number of components and assembly steps in the cooking equipment 100, thus increasing production costs, but it also interacts with a portion of the magnetic field generated by the first excitation coil 131, inducing eddy currents in the magnet, causing its temperature to rise, resulting in energy loss and reduced energy conversion efficiency. Furthermore, when the magnet's temperature rises or it vibrates, its internal structure and external parameters change, potentially reducing the suppression of magnetic leakage and causing instability during the use of the cooking equipment 100.

[0032] Therefore, in order to avoid the problems caused by setting a magnet and improve the stability and reliability of the cooking equipment 100, this utility model adopts a scheme of not setting a magnet between the first excitation coil 131 and the installation area 11a. By optimizing the structure of the first excitation coil 131, that is, setting the first excitation coil 131 to include multiple coil groups 1311, setting the coil groups 1311 to be arranged at intervals in the radial direction of an imaginary circle, and increasing the spacing between two adjacent coil groups 1311 to be greater than 12mm, the degree of concentrated distribution of magnetic field lines can be reduced, the magnetic field generated by the first excitation coil 131 can be weakened, and the magnetic leakage phenomenon can be reduced.

[0033] Meanwhile, since the coil group 1311 is arranged at intervals in the radial direction of an imaginary circle, the magnetic field is not only more dispersed on the bottom wall 121 of the cooking pot 12, but also the area on which the magnetic field acts on the cooking pot 12 is increased, which is conducive to achieving uniform heating of the cooking pot 12 by the first excitation coil 131.

[0034] According to the embodiment of the present invention, the cooking device 100 can reduce the degree of magnetic field concentration by optimizing the structure of the first excitation coil 131, weaken the magnetic field generated by the coil group 1311, reduce magnetic leakage without setting a magnet, and reduce the number of parts, simplify production steps, improve production efficiency, reduce production costs, and achieve a lightweight design of the cooking device 100 by optimizing the structure of the first excitation coil 131.

[0035] For example, in actual use, due to the limitation of user space, the cooking device 100 is often placed on a metal rack or stacked with other devices. During the use of the cooking device 100, the magnetic field of the excitation coil does not act entirely on the cooking pot 12. A part of the magnetic field acts on the metal rack or other devices below the cooking device 100, causing eddy currents to be generated on the surface of the metal rack or other devices, resulting in a local temperature increase. Since the base 11 and other structures of the cooking device 100 are generally made of plastic, the base 11 and other structures are very prone to melting, and may even further damage other components on the base 11.

[0036] Therefore, according to the embodiment of the present invention, by optimizing the structure of the first excitation coil 131, the magnetic field strength of the first excitation coil 131 per unit area in the plane perpendicular to the height direction of the cooking pot 12 can be reduced. This can reduce the risk of the base 11 of the cooking device 100 melting when the cooking device 100 is placed on a metal rack or stacked with other devices, thereby improving the durability of the cooking device 100.

[0037] Reference Figure 6In some embodiments, multiple coil groups 1311 are arranged at equal intervals in the radial direction of the imaginary circle; or, in the multiple coil groups 1311, the distance between two adjacent coil groups 1311 gradually decreases from the inside to the outside in the radial direction of the imaginary circle.

[0038] For example, multiple coil groups 1311 are arranged at equal intervals in the radial direction of an imaginary circle. For instance, the radial distance between any two adjacent coil groups 1311 in the imaginary circle can be 13mm, 15mm, 17mm, etc.

[0039] This configuration ensures that the magnetic field generated by the first excitation coil 131 is evenly distributed, thereby evenly dispersing the eddy currents acting on the cooking pot 12. This makes the temperature of the cooking pot 12 more uniform, which can effectively improve the cooking performance of rice cookers that require a uniform heat field for cooking rice.

[0040] For example, multiple coil groups 1311 are arranged radially in an imaginary circle, wherein the spacing between two adjacent coil groups 1311 gradually decreases from the inside to the outside in the radial direction of the imaginary circle. For example, the spacing between the two innermost coil groups 1311 in the radial direction of the imaginary circle can be 17 mm, and the spacing between the two outermost coil groups 1311 can be 13 mm.

[0041] This configuration makes the magnetic field generated by the first excitation coil 131 more dispersed, avoiding the situation where the magnetic field strength in the central area of ​​the bottom wall 121 of the cooking pot 12 is too high, causing the temperature in the central area of ​​the bottom wall 121 to be too high.

[0042] In the above technical solution, by arranging multiple coil groups 1311 at equal intervals in the radial direction of the imaginary circle, or by setting the spacing between adjacent coil groups 1311 to gradually decrease from the inside to the outside in the radial direction of the imaginary circle, the degree of concentrated distribution of magnetic field lines can be effectively reduced, thereby achieving dispersed heating of the bottom wall 121 of the cooking pot 12. This avoids the magnetic field generated by the first excitation coil 131 from concentrating in the central area of ​​the bottom wall 121, which would cause the temperature in the central area of ​​the bottom wall 121 to be too high.

[0043] Reference Figures 4-6 In some embodiments, the area in which each coil group 1311 is projected onto the bottom wall 121 of the cooking pot 12 is annular.

[0044] By setting the area where the projection of each coil group 1311 on the bottom wall 121 of the cooking pot 12 is located to be circular, the coil group 1311 can generate a circular magnetic field through electromagnetic induction, thereby enabling the cooking pot 12 to be heated evenly in the circumferential direction, which is beneficial to improving the heating efficiency of the cooking pot 12.

[0045] Refer again Figures 4-6In some examples, among the multiple coil groups 1311, the projection of the outer coil group 1311 onto the bottom wall 121 of the cooking pot 12 is a circular area.

[0046] The diameter of the outer contour line of the annular region is greater than or equal to 140 mm. For example, the diameter of the outer contour line of the annular region can be 140 mm, 150 mm, 160 mm, etc.

[0047] And / or, the ratio of the area enclosed by the outer contour of the annular region to the surface area of ​​the bottom wall 121 of the cooking pot 12 is greater than or equal to 2 / 3. For example, the ratio of the area enclosed by the outer contour of the annular region to the surface area of ​​the bottom wall 121 of the cooking pot 12 can be 2 / 3, 3 / 4, etc.

[0048] This configuration allows the magnetic field generated by the multiple coil groups 1311 after being energized to act on a larger area of ​​the bottom wall 121 of the cooking pot 12, so that the bottom wall 121 of the cooking pot 12 can generate eddy currents under the action of the magnetic field, thereby achieving uniform heating of the bottom wall 121 and avoiding the situation where the area of ​​the magnetic field acting on the bottom wall 121 is too small, which would lead to a decrease in heating efficiency.

[0049] Reference Figures 5-7 In some specific examples, each coil group 1311 includes a plurality of first coil segments 13111, which are connected end to end and are wound from the inside to the outside in the radial direction of an imaginary circle. The plurality of first coil segments 13111 are at least partially arranged in the radial direction of the imaginary circle. In the description of this utility model, "a plurality of" means two or more.

[0050] Therefore, by configuring each coil group 1311 to include a plurality of first coil segments 13111, and configuring the plurality of first coil segments 13111 to be arranged at least partially in the radial direction of an imaginary circle, the magnetic fields generated by the plurality of first coil segments 13111 within each coil group 1311 can be superimposed. In this way, under the condition of satisfying the magnetic field strength, the current flowing through the first coil segment 13111 can be reduced, thereby reducing the heat generated by the first coil segment 13111 when energized.

[0051] Reference Figure 6 and Figure 7 In some specific examples, the radial distance between two adjacent coil groups 1311 in the imaginary circle is L1, and the radial distance between two adjacent first coil segments 13111 in the imaginary circle in a single coil group 1311 is L2, with the ratio of L1 to L2 being greater than 5. For example, the ratio of L1 to L2 can be 6, 8, 9, 10, etc.

[0052] In the above technical solution, by setting the ratio of L1 to L2 to be greater than 5, that is, by setting the radial distance between two adjacent first coil segments 13111 in a single coil group 1311 to be smaller and the radial distance between two adjacent coil groups 1311 to be larger, the degree of magnetic field concentration distribution can be reduced to a certain extent, the leakage magnetic field of the coil group 1311 can be reduced, and the heating efficiency of the cooking device 100 can also be guaranteed.

[0053] Reference Figures 3-5 In some embodiments, the cooking body 10 further includes a support member 14, which is disposed above the base 11 and defines a receiving cavity 14a in which the cooking pot 12 is disposed. The support member 14 has a plurality of mounting slots 14b on the side facing the base 11, and a plurality of first coil segments 13111 are embedded in the plurality of mounting slots 14b.

[0054] In the above technical solution, by setting the support member 14, the receiving cavity 14a is defined by the support member 14, which can provide an installation position for the cooking pot 12; by providing multiple mounting slots 14b on the side of the support member 14 facing the base 11, multiple first coil segments 13111 can be embedded in the multiple mounting slots 14b, so as to fix the multiple first coil segments 13111, and prevent the multiple first coil segments 13111 from leaving the preset position during the use of the cooking device 100, which would cause the magnetic field acting on the bottom wall 121 of the cooking pot 12 to change, and ultimately lead to uneven temperature of the bottom wall 121.

[0055] For example, the wall of the mounting groove 14b has a heat-pressed deformation portion (not shown in the figure), which presses the first coil segment 13111 into the mounting groove 14b. Compared with the method of fixing the coil segment with screws or magnet brackets in the related art, the assembly steps can be simplified, the number of parts can be reduced, and the cost can be lowered.

[0056] For example, the mounting groove 14b is provided with a limiting member 14b1 to limit the first coil segment 13111 embedded in the mounting groove 14b and prevent the first coil segment 13111 from falling out of the mounting groove 14b.

[0057] Reference Figure 6 In some embodiments, multiple coil groups 1311 are connected in series, and in each coil group 1311, multiple first coil segments 13111 are connected in series.

[0058] This configuration simplifies the control logic of the multiple first coil segments 13111 of the coil group 1311, reducing production costs. On the other hand, it ensures that the current flowing through each first coil segment 13111 is consistent, making the magnetic field generated by the first coil segment 13111 through electromagnetic induction more consistent. That is, the magnitude of the eddy currents acting on the bottom wall 121 of the cooking pot 12 is more consistent. When the cooking device 100 is in use, it can heat the food in the cooking pot 12 more evenly, improving the cooking performance of the cooking device 100.

[0059] Reference Figure 3 and Figure 4 In some specific embodiments, the cooking device 100 also includes a magnetic shielding element 30, which is disposed between the first excitation coil 131 and the mounting area 11a.

[0060] In one embodiment, the magnetic shielding element 30 is disc-shaped, and the center of the magnetic shielding element 30 is located on the central axis of the first excitation coil 131.

[0061] Specifically, since the first excitation coil 131 is located between the installation area 11a and the cooking pot 12, when the first excitation coil 131 is energized, part of the magnetic field generated by the first excitation coil 131 through electromagnetic induction is located on the side where the cooking pot 12 is located, and the other part is located on the side away from the cooking pot 12. Therefore, the bottom wall 121 of the cooking pot 12 will have the problem of magnetic field leakage. By placing the magnetic shielding component 30 between the first excitation coil 131 and the installation area 11a, the magnetic field strength of the side of the first excitation coil 131 away from the cooking pot 12 can be weakened, thereby reducing the risk of magnetic leakage.

[0062] Furthermore, the magnetic shielding component 30 is disc-shaped, and the center of the magnetic shielding component 30 is located on the central axis of the first excitation coil 131, so that the area of ​​the magnetic field generated by the magnetic shielding component 30 and the first excitation coil 131 is maximized, thereby enhancing the weakening effect of the magnetic field strength of the magnetic shielding component 30 on the side of the first excitation coil 131 away from the cooking pot 12, and further reducing the risk of magnetic leakage.

[0063] Therefore, in the above technical solution, since the cooking device 100 of the present invention has optimized the first coil segment 13111 of the first excitation coil 131, the overall magnetic field strength of the first excitation coil 131 has been weakened, thereby alleviating the magnetic leakage phenomenon. Therefore, a magnetic shielding component 30 can be provided between the first excitation coil 131 and the mounting area 11a to further reduce the magnetic leakage phenomenon.

[0064] In some other specific embodiments, no magnetic shielding element 30 is provided between the first excitation coil 131 and the mounting area 11a.

[0065] Because the cooking device 100 of this utility model has optimized the first coil segment 13111 of the first excitation coil 131, the magnetic field generated by the first excitation coil 131 is weakened, thereby reducing the magnetic field strength on the side of the first excitation coil 131 away from the cooking pot 12, i.e. reducing magnetic leakage, the magnetic shielding component 30 does not need to be provided between the first excitation coil 131 and the mounting area 11a, thereby reducing the number of components of the cooking device 100, simplifying the assembly steps, and reducing production costs.

[0066] Reference Figure 2 , Figure 5 and Figure 7 In some embodiments, the heating device 13 further includes a second excitation coil 132, which corresponds to the peripheral wall 122 of the cooking pot 12 and is coiled from bottom to top along the height direction of the cooking pot 12. In the description of this utility model, "a plurality of" means two or more.

[0067] For cooking appliances 100 with a large cooking pot 12, such as rice cookers, there is often a lot of food in the cooking pot 12. If the food is heated by the first excitation coil 131 on the bottom wall 121 of the cooking pot 12, the food near the bottom wall 121 of the cooking pot 12 can be heated evenly, but the food far from the bottom wall 121 of the cooking pot 12 cannot be heated sufficiently. For food that needs to be heated evenly, the cooking performance of the cooking appliance 100 cannot meet the requirements.

[0068] Therefore, by setting the second excitation coil 132 at a corresponding position on the peripheral wall 122 of the cooking pot 12, the peripheral wall 122 of the cooking pot 12 can be heated by the second excitation coil 132, so as to heat the food in the cooking pot 12 more evenly; by setting the second electromagnetic heating device 13 to include a plurality of second coil segments 1321, and arranging at least a portion of each second coil segment 1321 along the height direction of the cooking pot 12, the magnetic fields generated by the plurality of second coil segments 1321 can be superimposed after the plurality of second coil segments 1321 are energized, thereby increasing the magnetic field strength and improving the heating effect of the second excitation coil 132 on the peripheral wall 122 of the cooking pot 12.

[0069] Reference Figures 2-4 In some specific embodiments, the cooking body 10 includes a support 14 and a shell 15. The support 14 is located above the base 11 and defines a receiving cavity 14a. The cooking pot 12 is located in the receiving cavity 14a. The shell 15 is fitted on the outside of the support 14 and is connected to the base 11.

[0070] The first excitation coil 131 is located on the side of the support member 14 facing the base 11, and the second excitation coil 132 is located on the side of the support member 14 facing the outer shell 15.

[0071] In the above technical solution, by placing the support member 14 above the base 11, on the one hand, a receiving cavity 14a can be defined to place the cooking pot 12, and on the other hand, it can serve as a mounting carrier for the first excitation coil 131 and the second excitation coil 132, so as to prevent the first excitation coil 131 and the second excitation coil 132 from leaving the preset position and affecting the cooking performance of the cooking device 100.

[0072] In addition, the outer shell 15 is connected to the base 11 to form the appearance structure of the cooking device 100. On the one hand, it can protect the internal structure, such as the support 14 and the heating device 13, and on the other hand, it can improve the durability and aesthetics of the cooking device 100.

[0073] Reference Figure 2 In some specific examples, the support 14 includes a heating plate bracket 141 and a mounting cylinder 142. The mounting cylinder 142 has openings 142a at both the upper and lower ends. The lower end of the mounting cylinder 142 is connected to the heating plate bracket 141 and the upper end is connected to the outer shell 15. The mounting cylinder 142 and the heating plate bracket 141 together define the receiving cavity 14a. Thus, when using the cooking device 100, the user can take the cooking pot 12 out of the receiving cavity 14a through the upper opening 142a; or put the cooking pot 12 into the receiving cavity 14a through the upper opening 142a.

[0074] Reference Figure 2 and Figure 4 The heating plate support 141 includes a horizontal extension 1411 and an arc-shaped extension 1412. The horizontal extension 1411 is disposed opposite to the mounting area 11a. The arc-shaped extension 1412 is connected between the lower end of the horizontal extension 1411 and the mounting cylinder 142. The first excitation coil 131 is disposed on the side of the horizontal extension 1411 away from the receiving cavity 14a, and the second excitation coil 132 is disposed on the side of the arc-shaped extension 1412 away from the receiving cavity 14a.

[0075] This configuration provides a mounting carrier for the first excitation coil 131 and the second excitation coil 132, allowing the first excitation coil 131 to heat the bottom wall 121 of the cooking pot 12 and the second excitation coil 132 to heat the peripheral wall 122 of the cooking pot 12, which helps to improve the cooking performance of the cooking equipment 100.

[0076] Reference Figure 2In some specific examples, the cooking body 10 also includes a circuit board assembly 16, which is placed upright around the periphery of the cooking pot 12 and located between the support member 14 and the outer shell 15. This arrangement allows the circuit board assembly 16 to be as far away from the first excitation coil 131 as possible, avoiding mutual interference between the first excitation coil 131 and the circuit board assembly 16, or even damage to the circuit board assembly 16. On the other hand, it can improve the space utilization between the support member 14 and the outer shell 15.

[0077] Reference Figure 8 In some embodiments, the first excitation coil 131 and the second excitation coil 132 are connected in series.

[0078] This configuration ensures that the current through the first excitation coil 131 and the second excitation coil 132 is the same, so that the magnetic field generated by the first excitation coil 131 and the second excitation coil 132 acts on the cooking pot 12 as evenly as possible. This generates eddy currents of similar size on the bottom wall 121 and the peripheral wall 122 of the cooking pot 12, which facilitates uniform heating of the food in the cooking pot 12 and improves the cooking performance of the cooking equipment 100. On the other hand, it simplifies the control logic of the first excitation coil 131 and the second excitation coil 132 and reduces production costs.

[0079] In some specific embodiments, the cooking device 100 is a rice cooker or a pressure cooker.

[0080] In this way, on the one hand, the heating device 13 can be used to heat the food in the rice cooker or pressure cooker more evenly, effectively improving the cooking performance of the rice cooker or pressure cooker. On the other hand, it can improve the production efficiency of the rice cooker or pressure cooker, reduce the production cost of the rice cooker or pressure cooker, and achieve a lightweight design of the rice cooker or pressure cooker.

[0081] According to some embodiments of the present invention, the heating power of the cooking device 100 is less than 1500W. While ensuring heating efficiency, the magnetic field strength of the first excitation coil 131 on a plane perpendicular to the height direction of the cooking pot 12 per unit area can be reduced. This can reduce the risk of the base 11 of the cooking device 100 melting when the cooking device 100 is placed on a metal rack or stacked with other devices, thereby improving the durability of the cooking device 100.

[0082] In the description of this utility model, it should be understood that the terms "upper", "lower", "horizontal", "top", "bottom", "inner", "outer", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0083] In the description of this utility model, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. In the description of this utility model, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature.

[0084] Other configurations and operations of the cooking apparatus 100 according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0085] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0086] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A cooking device, characterized in that, include: The cooking body includes a base, a cooking pot, and a heating device. The cooking pot is located above the base, and the heating device is used to heat the cooking pot and includes a first excitation coil. A lid assembly, located on the cooking body, is used to open and close the opening of the cooking pot; The base has an installation area for the first excitation coil, which is located between the installation area and the bottom wall of the cooking pot. No magnet is placed between the first excitation coil and the installation area. The first excitation coil includes multiple coil groups, which are arranged at intervals in the radial direction of an imaginary circle. The distance between two adjacent coil groups is greater than 12 mm. The center of the imaginary circle is located on the central axis of the first excitation coil, and the imaginary circle is located on a plane perpendicular to the central axis.

2. The cooking apparatus according to claim 1, characterized in that, The plurality of coil groups are arranged at equal intervals in the radial direction of the imaginary circle; Alternatively, in a plurality of said coil groups, the distance between two adjacent said coil groups gradually decreases from the inside to the outside in the radial direction of said imaginary circle.

3. The cooking apparatus according to claim 1, characterized in that, The projection of each coil assembly onto the bottom wall of the cooking pot forms a circular area.

4. The cooking apparatus according to claim 1, characterized in that, In the plurality of coil groups, the outermost coil group has a projection area on the bottom wall of the cooking pot that is an annular region. Wherein, the diameter of the outer contour line of the annular region is greater than or equal to 140 mm; and / or, the ratio of the area enclosed by the outer contour line of the annular region to the surface area of ​​the bottom wall of the cooking pot is greater than or equal to 2 / 3.

5. The cooking apparatus according to any one of claims 1-4, characterized in that, Each coil group includes a plurality of first coil segments connected end to end and wound from the inside to the outside in the radial direction of the imaginary circle; The plurality of the first coil segments are arranged at least partially in the radial direction of the imaginary circle.

6. The cooking apparatus according to claim 5, characterized in that, The distance between two adjacent coil groups in the radial direction of the imaginary circle is L1. In a single coil group, the distance between two adjacent first coil segments in the radial direction of the imaginary circle is L2. The ratio of L1 to L2 is greater than 5.

7. The cooking apparatus according to claim 5, characterized in that, The cooking body also includes a support member, which is located above the base and defines a receiving cavity, in which the cooking pot is located; The support member has multiple mounting slots on the side facing the base, and multiple first coil segments are embedded in the multiple mounting slots.

8. The cooking apparatus according to claim 5, characterized in that, Multiple coil groups are connected in series, and multiple first coil segments are connected in series in each coil group.

9. The cooking apparatus according to any one of claims 1-4, characterized in that, The cooking device also includes a magnetic shielding component, which is disposed between the first excitation coil and the mounting area. The magnetic shielding component is disc-shaped, and the center of the magnetic shielding component is located on the central axis of the first excitation coil. Alternatively, no magnetic shielding element may be provided between the first excitation coil and the mounting area.

10. The cooking apparatus according to any one of claims 1-4, characterized in that, The heating device also includes a second excitation coil, which is positioned corresponding to the peripheral wall of the cooking pot and is coiled from bottom to top along the height direction of the cooking pot.

11. The cooking apparatus according to claim 10, characterized in that, The cooking body includes: A support member is provided above the base and defines a receiving cavity, in which the cooking pot is located; The outer shell is fitted onto the outside of the support member and connected to the base; The first excitation coil is located on the side of the support member facing the base, and the second excitation coil is located on the side of the support member facing the outer shell.

12. The cooking apparatus according to claim 11, characterized in that, The cooking body also includes a circuit board assembly, which is placed upright on the periphery of the cooking pot and located between the support and the outer shell.

13. The cooking apparatus according to claim 10, characterized in that, The first excitation coil and the second excitation coil are connected in series.

14. The cooking apparatus according to claim 1, characterized in that, The cooking device is a rice cooker or a pressure cooker; and / or, the heating power of the cooking device is less than 1500W.

Images