Coil panel and cooking utensil

Abstract

The invention provides a coil panel and a cooking utensil, and relates to the technical field of household appliances. The coil panel comprises an inner ring coil group and an outer ring coil group which are connected in series, and the outer ring coil group is arranged outside the inner ring coil group in a surrounding mode in the radial direction of the inner ring coil group. The outer ring coil group and the inner ring coil group meet the following formula: rd = ro / ri, and rd is greater than or equal to 1 and less than or equal to 5; roo = Ro / No; ri is equal to Ri / Ni; rd is the distribution ratio of the outer-ring coil group to the inner-ring coil group, ro is the ratio of the average radius of the outer-ring coil group to the number of turns of the outer-ring coil group, ri is the ratio of the average radius of the inner-ring coil group to the number of turns of the inner-ring coil group, Ro is the average radius of the outer-ring coil group, No is the number of turns of the outer-ring coil group, and Ri is the average radius of the inner-ring coil group; ni is the number of turns of the inner ring coil group. The coil panel can solve the problem that the coil panel cannot uniformly heat the bottom of a pot.

Description

Technical Field

[0001] The present application relates to the technical field of household appliances, and particularly relates to a coil disk and a cooking appliance. Background Art

[0002] Cooking appliances such as induction cookers have the advantages of fast heating, no open flame, safety and convenience, and are increasingly favored and recognized by consumers. When an induction cooker is working, it can use high-frequency alternating current to pass through a coil disk to generate a high-frequency changing magnetic field. The high-frequency changing magnetic field can generate eddy currents at the bottom of a metal cookware placed on the induction cooker to heat the food in the metal cookware.

[0003] The coil disk includes a coil and a coil bracket, and the coil bracket is provided with a coil groove. At least one layer of coil can be wound in the coil groove. The coil can include an inner ring coil close to the center and an outer ring coil far from the center. In the related art, the magnetic force lines of the magnetic field of the inner ring coil are dense and the magnetic field is too strong, and the area of the region corresponding to the inner ring coil is small. Therefore, it is easy to generate high energy in the inner ring coil and the transition region between the inner ring coil and the outer ring coil, thereby affecting the uniformity of heating the bottom of the cookware by the coil disk, resulting in phenomena such as sticking of the pot, and affecting the user experience. Summary of the Invention

[0004] The present application provides a coil disk and a cooking appliance, which can solve the problem of uneven heating of the bottom of the cookware by the coil disk.

[0005] On the one hand, the present application provides a coil disk, including a series-connected inner ring coil group and an outer ring coil group. Along the radial direction of the inner ring coil group, the outer ring coil group is disposed outside the inner ring coil group;

[0006] The outer ring coil group and the inner ring coil group satisfy the following formula,

[0007] rd = ro / ri and 1 ≤ rd ≤ 5

[0008] ro = Ro / No

[0009] ri = Ri / Ni

[0010] Wherein, the rd is the distribution ratio of the outer ring coil group to the inner ring coil group, the ro is the ratio of the average radius of the outer ring coil group to the number of turns of the outer ring coil group, the ri is the ratio of the average radius of the inner ring coil group to the number of turns of the inner ring coil group, the Ro is the average radius of the outer ring coil group, the No is the number of turns of the outer ring coil group, the Ri is the average radius of the inner ring coil group, and the Ni is the number of turns of the inner ring coil group.

[0011] The coil disk provided by the present application adjusts the outer ring coil group and the inner ring coil group to satisfy that the distribution ratio is greater than or equal to 1 and less than or equal to 5, so as to reduce the magnetic field energy of the inner ring coil group and increase the magnetic field energy of the outer ring coil group, thereby reducing the possibility that the magnetic field energy of the inner ring coil group is relatively high or the energy in the transition region between the inner ring coil group and the outer ring coil group is relatively high, resulting in a relatively high temperature in the corresponding region at the bottom of the cookware and affecting the heating uniformity of the cookware, which is beneficial to reducing the occurrence of the phenomenon of the cookware getting burnt.

[0012] According to an embodiment of the present application, there is a spacer between the outside of the inner ring coil group and the inside of the outer ring coil group.

[0013] The spacer can provide heating for the cookware by attracting and converging the magnetic field intensity generated by the inner ring coil group and the magnetic field intensity generated by the outer ring coil group, thereby reducing the possibility that the relatively high magnetic field intensity in the spacer affects the heating uniformity of the coil disk.

[0014] According to an embodiment of the present application, the number of coil layers on the inside of the inner ring coil group is greater than the number of coil layers on the outside of the inner ring coil group.

[0015] By setting the number of coil layers on the inside of the inner ring coil group to be greater than the number of coil layers on the outside, the average radius Ri value of the coil can be made smaller, that is, the peak value of the magnetic field intensity in the inner ring coil group is close to the central region of the coil disk, and the peak value of the magnetic field intensity of the inner ring coil group can be far from the peak value of the magnetic field intensity of the outer ring coil group, thereby reducing the amount of magnetic field that the inner ring coil group and the outer ring coil group attract and converge in the spacer to ensure the magnetic field intensity of the inner ring coil group.

[0016] According to an embodiment of the present application, the number of coil layers on the outside of the outer ring coil group is greater than the number of coil layers on the inside of the outer ring coil group.

[0017] By setting the number of coil layers on the outside of the outer ring coil group to be greater than the number of coil layers on the inside, the average radius Ro value of the coil can be made smaller, and the peak value of the magnetic field intensity in the outer ring coil group can be far from the central region of the coil disk, that is, the peak value of the magnetic field intensity of the outer ring coil group can be far from the peak value of the magnetic field intensity of the inner ring coil group, thereby reducing the amount of magnetic field that the outer ring coil group and the inner ring coil group attract and converge in the spacer to ensure the magnetic field intensity of the outer ring coil group.

[0018] According to an embodiment of the present application, no spacer is provided between the inner ring coil group and the outer ring coil group, and the number of coil layers on the outside of the inner ring coil group is a single-layer coil; and / or,

[0019] The number of coil layers on the inside of the outer ring coil group is a single-layer coil.

[0020] By setting the number of coil layers on the outer side of the inner ring coil group to a single-layer coil, the possibility that the magnetic field generated by the inner ring coil group converges in a large amount in the spacer area, resulting in a high magnetic field strength in the spacer area, can be reduced.

[0021] By setting the number of coil layers on the inner side of the outer ring coil group to a single-layer coil, the possibility that the magnetic fields generated by the outer ring coil group and the inner ring coil group converge in a large amount in the spacer area, resulting in a high magnetic field strength in the spacer area, can be reduced.

[0022] According to an embodiment of the present application, it further includes a bracket, the bracket is provided with a plurality of first wire grooves and a plurality of second wire grooves, the inner ring coil group is wound in the plurality of first wire grooves, and the outer ring coil group is wound in the plurality of second wire grooves;

[0023] The coils of the inner ring coil group close to the openings of the respective first wire grooves are flush, and the coils of the outer ring coil group close to the openings of the respective second wire grooves are flush.

[0024] By making the distances between the multiple coils of the inner ring coil group close to the cookware equal to the bottom of the cookware, it is beneficial to the short-distance magnetic field conduction between the inner ring coil group and the cookware, improving the heating efficiency. In addition, the multiple coils of the inner ring coil group close to the cookware being flush can also improve the appearance neatness of the upper surface of the inner ring coil group.

[0025] By making the distances between the multiple coils of the outer ring coil group and the bottom of the cookware equal, it is beneficial to the short-distance magnetic field conduction between the outer ring coil group and the cookware, improving the heating efficiency, and can also improve the appearance neatness of the upper surface of the outer ring coil group.

[0026] According to an embodiment of the present application, the coils of the inner ring coil group close to the openings of the respective first wire grooves are flush with the coils of the outer ring coil group close to the openings of the respective second wire grooves.

[0027] By making the coils of the inner ring coil group close to the cookware side flush with the coils of the outer ring coil group close to the cookware side, short-distance magnetic field conduction can be achieved between the entire coil disk and the cookware, so as to improve the heating efficiency, and it is also beneficial to improve the flatness of the upper surface of the entire coil disk.

[0028] According to an embodiment of the present application, the number of turns of the inner ring coil group is greater than or equal to the number of turns of the outer ring coil group.

[0029] According to an embodiment of the present application, the coil disk further includes a magnetic strip assembly, the magnetic strip assembly is arranged on the bracket, the magnetic strip assembly includes a plurality of outer magnetic strips, and the plurality of outer magnetic strips are distributed along the circumferential direction of the inner ring coil group, and the outer magnetic strips correspond to the outer ring coil group.

[0030] The outer magnetic stripe can be used to converge the magnetic field generated by the outer ring coil group, so as to act on increasing the magnetic field intensity and improving the heating efficiency of the bottom of the cookware.

[0031] On the other hand, a cooking appliance provided by the present application includes a panel, a housing, and the coil disk described in any of the above embodiments, and the coil disk is located in the internal space formed by the panel and the housing.

[0032] In addition to the technical problems solved by the embodiments of the present invention described above, the technical features constituting the technical solutions, and the beneficial effects brought by the technical features of these technical solutions, other technical problems that can be solved by the coil disk and the cooking appliance provided by the embodiments of the present invention, other technical features included in the technical solutions, and the beneficial effects brought by these technical features will be further described in detail in the specific implementation manners. Description of the Drawings

[0033] The drawings here are incorporated into the specification and constitute a part of this specification, showing embodiments consistent with the present application, and are used together with the specification to explain the principles of the present application.

[0034] Figure 1 Partial structural schematic diagram of a cooking appliance according to an embodiment of the present application;

[0035] Figure 2 Schematic perspective view of a coil disk according to an embodiment of the present application;

[0036] Figure 3 Exploded structural schematic diagram of a coil disk according to an embodiment of the present application;

[0037] Figure 4 Cross-sectional structural schematic diagram of a coil disk according to Embodiment 1 of the present application;

[0038] Figure 5 Cross-sectional structural schematic diagram of a coil disk according to Embodiment 2 of the present application;

[0039] Figure 6 Cross-sectional structural schematic diagram of a coil disk according to Embodiment 3 of the present application;

[0040] Figure 7 Curves of heat energy distribution on the bottom of the pot by the coil disk according to Embodiment 1 of the present application;

[0041] Figure 8 Curves of heat energy distribution on the bottom of the pot by the coil disk according to Embodiment 2 of the present application;

[0042] Figure 9 Curves of heat energy distribution on the bottom of the pot by the coil disk according to Embodiment 3 of the present application.

[0043] Description of the reference numerals:

[0044] 10 - Cooking appliance;

[0045] 100 - Coil disk; 100a - Spacing area;

[0046] 110 - Inner ring coil group;

[0047] 120 - Outer ring coil group;

[0048] 130 - Bracket; 131 - First wire winding groove; 132 - Second wire winding groove;

[0049] 140 - Magnetic strip assembly; 141 - Outer magnetic strip; 142 - Long magnetic strip;

[0050] 200 - Housing.

[0051] Through the above - mentioned drawings, specific embodiments of the present application have been shown, and there will be a more detailed description hereinafter. These drawings and written descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. Detailed implementation manners

[0052] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts belong to the scope of protection of the present application.

[0053] Induction cookers, electro - ceramic cookers, electric pressure cookers, etc. are common cooking appliances for people. The cooking appliance includes a panel, a housing, and a coil disk. The panel and the housing can enclose a relatively airtight cavity for shielding the charged components such as the internal power board, control board, and coil disk during the working process. Among them, the control board is electrically connected to the coil disk to control the opening and closing of the coil disk through the control board. The coil disk can be an electromagnetic coil. When working, a high - frequency current passes through the coil disk to generate countless closed magnetic field forces. The magnetic force lines cutting the cookware can generate countless small eddy currents, so that the cookware placed on the panel heats up. When in use, the cookware is placed on the panel of the cooking appliance. The cooking appliance can be used to cook the food ingredients in the cookware.

[0054] The coil disk includes a coil and a coil bracket, and the coil bracket is provided with a coil groove. At least one layer of coil can be wound in the coil groove. The coil can include an inner ring coil near the center and an outer ring coil far from the center. In the related art, the magnetic field lines of the inner ring coil are dense and the magnetic field is too strong, and the area of the corresponding region of the inner ring coil is small. Therefore, it is easy to generate high energy in the inner ring coil and the transition region between the inner ring coil and the outer ring coil, thereby affecting the uniformity of heating the bottom of the cookware by the coil disk, resulting in phenomena such as sticking of the pot and affecting the user experience.

[0055] Based on the above technical problems, the applicant has improved the structure of the existing coil disk. In this application, the distribution ratio of the outer ring coil group to the inner ring coil group can be adjusted to be greater than or equal to 1 and less than or equal to 5, so as to reduce the magnetic field energy of the inner ring coil group and increase the magnetic field energy of the outer ring coil group, thereby reducing the possibility that the magnetic field energy of the inner ring coil group is too high or the energy in the transition region between the inner ring coil group and the outer ring coil group is too high, resulting in a relatively high temperature in the corresponding region of the bottom of the cookware and affecting the uniformity of heating the cookware, which is beneficial to reducing the occurrence of sticking of the pot.

[0056] The coil disk and the cooking appliance provided by the present application will be described below with reference to the accompanying drawings and in combination with specific embodiments.

[0057] See Figures 1 to 3 As shown, the coil disk 100 of the embodiment of the present application can include a series-connected inner ring coil group 110 and an outer ring coil group 120. Along the radial direction of the inner ring coil group 110, the outer ring coil group 120 is disposed outside the inner ring coil group 110. The outer ring coil group 120 and the inner ring coil group 110 satisfy the following formula,

[0058] rd = ro / ri and 1 ≤ rd ≤ 5

[0059] ro = Ro / No

[0060] ri = Ri / Ni

[0061] wherein, rd is the distribution ratio of the outer ring coil group 120 to the inner ring coil group 110, ro is the ratio of the average radius of the outer ring coil group 120 to the number of turns of the outer ring coil group 120, ri is the ratio of the average radius of the inner ring coil group 110 to the number of turns of the inner ring coil group 110, Ro is the average radius of the outer ring coil group 120, No is the number of turns of the outer ring coil group 120, Ri is the average radius of the inner ring coil group 110, and Ni is the number of turns of the inner ring coil group 110.

[0062] It should be noted that the ratio of the average radius Ro of the outer ring coil group 120 to the number of turns No of the outer ring coil group 120 is abbreviated as the outer ring average radius turn ratio ro, which can be used to represent the magnetic field strength of the outer ring coil group 120. The ratio of the average radius Ri of the inner ring coil group 110 to the number of turns Ni of the inner ring coil group 110 is abbreviated as the inner ring average radius turn ratio ri, which can be used to represent the magnetic field strength of the inner ring coil group 110. Therefore, the distribution ratio rd can be used to indicate the magnetic field strength distribution ratio between the outer ring coil group 120 and the inner ring coil group 110. Correspondingly, it can also be used to concisely represent the heating intensity distribution of the magnetic field strengths generated by the outer ring coil group 120 and the inner ring coil group 110 on the cookware.

[0063] It is easy to understand that the values of the outer ring average radius turn ratio ro and the inner ring average radius turn ratio ri can affect the value of the distribution ratio rd. The value of the outer ring average radius turn ratio ro is related to the average radius Ro and the number of coils No of the coils in the outer ring coil group 120. The value of the inner ring average radius turn ratio ri is related to the average radius Ri and the number of coils Ni of the coils in the inner ring coil group 110. Among them, the average radius Ro of the coils in the outer ring coil group 120 can refer to the ratio of the sum of the radii of all the coils in the outer ring coil group 120 to the total number of coils No in the outer ring coil group 120. The average radius Ri of the coils in the inner ring coil group 110 can refer to the ratio of the sum of the radii of all the coils in the inner ring coil group 110 to the total number of coils Ni in the inner ring coil group 110.

[0064] Therefore, the value of the distribution ratio rd is related to the parameter values of the average radius Ro of the coils in the outer ring coil group 120, the total number of coils No, the average radius Ri of the coils in the inner ring coil group 110, and the total number of coils Ni. The parameter values of the average radius Ro of the coils in the outer ring coil group 120, the total number of coils No, the average radius Ri of the coils in the inner ring coil group 110, and the total number of coils Ni can be adjusted to satisfy that the value of the distribution ratio rd is greater than or equal to 1 and less than 5.

[0065] The present application exemplarily provides the following three embodiments.

[0066] Embodiment 1, as shown in Figure 4 As shown, the total number of coils No of the outer ring coil group 120 is 16, and the average radius Ro of the coils of the outer ring coil group 120 is 74.74, that is, the outer ring average radius turn ratio ro is 4.67. The total number of coils Ni of the inner ring coil group 110 is 17, and the average radius Ri of the coils of the inner ring coil group 110 is 21.97, that is, the inner ring average radius turn ratio ri is 1.29. Therefore, the value of the distribution ratio rd is 3.61.

[0067] Embodiment 2, as shown in Figure 5As shown, the total number of coils No of the outer ring coil group 120 is 16, and the average radius Ro of the coils of the outer ring coil group 120 is 75.18, that is, the ratio of the outer ring average radius to the number of turns ro is 4.7. The total number of coils Ni of the inner ring coil group 110 is 19, and the average radius Ri of the coils of the inner ring coil group 110 is 23.54, that is, the ratio of the inner ring average radius to the number of turns ri is 1.24. Therefore, the distribution ratio rd value is 3.79.

[0068] Example 3, see Figure 6 As shown, the total number of coils No of the outer ring coil group 120 is 14, and the average radius Ro of the coils of the outer ring coil group 120 is 75.42, that is, the ratio of the outer ring average radius to the number of turns ro is 5.39. The total number of coils Ni of the inner ring coil group 110 is 19, and the average radius Ri of the coils of the inner ring coil group 110 is 25.98, that is, the ratio of the inner ring average radius to the number of turns ri is 1.37. Therefore, the distribution ratio rd value is 3.94.

[0069] See Figures 7 to 9 The energy distribution simulation curves obtained by actually measuring the heating of the bottom of the cookware by the coil disk 100 of the above three embodiments are shown. Among them, the abscissa R represents the radius of the bottom of the cookware. The ordinate E represents the heating energy corresponding to the radius of the bottom of the cookware. The black triangles represent the average radius positions of the inner ring coil group 110 and the outer ring coil group 120.

[0070] It is easy to understand that the energy of the inner ring coil group 110 of Example 1 for heating the bottom of the cookware is relatively low. Therefore, it can better solve the problem in the related technology that the high energy of the inner ring coil group 110 affects the heating uniformity.

[0071] In addition, according to the group standard T / CAB 0133-2022 Test Method for Heating Uniformity Grade of Household Induction Cookers of China Industry-University-Research Cooperative Promotion Association, the uniformity of the three embodiments is calculated. Among them, the uniformity of Example 1 exceeds 87% and can reach the first-level index. The uniformity of Example 2 exceeds 86% and can reach the first-level index. The uniformity of Example 3 exceeds 84% and can reach the second-level index and is close to the first-level index. Therefore, all three embodiments can achieve a relatively high uniformity.

[0072] It is easy to understand that the distribution ratio rd of the above three embodiments is between 1 and 5, and all can meet a relatively high heating uniformity.

[0073] In some examples, the number of coils in the inner ring coil group 110 and the number of coils in the outer ring coil group 120 need to meet the heating power of the cookware. Therefore, the present application schematically provides the above three embodiments. The distribution ratio rd values of the three embodiments are all between 3 and 4, and the smaller the distribution ratio rd, the higher the heating uniformity of the coil disk 100. It should be noted that the average radii and the number of coils of the inner ring coil group 110 and the outer ring coil group 120 can be but are not limited to the above three embodiments.

[0074] In some realizable ways, referring to Figure 4 and Figure 5 as shown, there may be a spacer area 100a between the outer side of the inner ring coil group 110 and the inner side of the outer ring coil group 120 in the embodiment of the present application. No coils are provided in the spacer area 100a.

[0075] When there are also multiple layers of coils in the spacer area 100a between the inner ring coil group 110 and the outer ring coil group 120, the magnetic field intensities generated by the inner ring coil group 110 and the outer ring coil group 120 are likely to converge to the spacer area 100a, and the multiple layers of coils in the spacer area 100a will also generate magnetic field intensities. As a result, a greater magnetic field intensity is likely to be generated in the spacer area 100a, leading to an excessively high temperature. In the embodiment of the present application, not providing coils in the spacer area 100a between the inner ring coil group 110 and the outer ring coil group 120 can effectively solve the above technical problems. The spacer area 100a can provide heating for the cookware by the attraction and convergence of the magnetic field intensities generated by the inner ring coil group 110 and the outer ring coil group 120, thereby reducing the possibility that the relatively high magnetic field intensity in the spacer area 100a affects the heating uniformity of the coil disk 100.

[0076] Specifically, during the operation of the coil disk 100, the inner ring coil group 110 can generate a magnetic field intensity peak, and the outer ring coil group 120 can generate a magnetic field intensity peak. The magnetic field intensity of the inner ring coil group 110 can spread outward from the peak, and the magnetic field intensity of the outer ring coil group 120 can also spread outward from the peak. Therefore, the magnetic fields of the inner ring coil group 110 and the outer ring coil group 120 can attract each other and converge in the spacer area 100a. The magnetic field intensity in the spacer area 100a can be jointly provided by the inner ring coil group 110 and the outer ring coil group 120 to avoid the phenomenon that the magnetic field intensity in a local area of the coil disk 100 is too high.

[0077] Among them, the magnetic field intensity in the spacer area 100a is lower than that of either the inner ring coil group 110 or the outer ring coil group 120. Moreover, the magnetic field intensity generated by the inner ring coil group 110 is lower than that generated by the outer ring coil group 120 to avoid the phenomenon of uneven heating caused by too high a magnetic field intensity generated by the inner ring coil group 110.

[0078] In some realizable ways, refer to Figures 4 to 6 As shown, the number of coil layers inside the inner loop coil group 110 in the embodiment of the present application can be greater than the number of coil layers outside the inner loop coil group 110.

[0079] In the embodiment of the present application, the number of coil layers of the inner loop coil group 110 is at least one layer. The average radius of the coils can correspond to the peak value of the magnetic field intensity. Therefore, the greater number of coil layers inside the inner loop coil group 110 than outside can make the average radius Ri value of the coils smaller, so that the peak value of the magnetic field intensity in the inner loop coil group 110 can be close to the central region of the coil disk 100. The peak value of the magnetic field intensity of the inner loop coil group 110 can be far from the peak value of the magnetic field intensity of the outer loop coil group 120, so as to reduce the magnetic field amount where the inner loop coil group 110 and the outer loop coil group 120 attract and converge in the spacer 100a, thereby ensuring the magnetic field intensity of the inner loop coil group 110.

[0080] In some realizable ways, refer to Figures 4 to 6 As shown, the number of coil layers outside the outer loop coil group 120 in the embodiment of the present application is greater than the number of coil layers inside the outer loop coil group 120.

[0081] In the embodiment of the present application, the number of layers of the outer loop coil group 120 is at least one layer. The average radius of the coils can correspond to the peak value of the magnetic field intensity. Therefore, the greater number of coil layers outside the outer loop coil group 120 than inside can make the average radius Ro value of the coils larger, so that the peak value of the magnetic field intensity in the outer loop coil group 120 can be far from the central region of the coil disk 100. The peak value of the magnetic field intensity of the outer loop coil group 120 can be far from the peak value of the magnetic field intensity of the inner loop coil group 110, so as to reduce the magnetic field amount where the outer loop coil group 120 and the inner loop coil group 110 attract and converge in the spacer 100a, thereby ensuring the magnetic field intensity of the outer loop coil group 120.

[0082] In some examples, the average radius Ri value of the coils of the inner loop coil group 110 in the embodiment of the present application can be smaller, and the average radius Ro value of the coils of the outer loop coil group 120 can be larger, so that there are sparse coils between the inner loop coil group 110 and the spacer 100a, and there are also sparse coils between the outer loop coil group 120 and the spacer 100a, thereby reducing the magnetic field amount where the inner loop coil group 110 and the outer loop coil group 120 attract and converge in the spacer 100a, to ensure the magnetic field intensity of the inner loop coil group 110 and the outer loop coil group 120, and avoid the phenomenon that the magnetic field intensity generated by the inner loop coil group 110 and the outer loop coil group 120 is lower than the magnetic field intensity of the spacer 100a.

[0083] Moreover, the distance between the peak value of the magnetic field intensity in the inner ring coil group 110 and the peak value of the magnetic field intensity in the outer ring coil group 120 is relatively large, which can make the distribution width of the strong magnetic field region along the center radial outward of the coil disk 100 relatively large.

[0084] In some examples, the number of coil layers of both the inner ring coil group 110 and the outer ring coil group 120 can be 3 layers. The number of coil layers of the coil of the inner ring coil group 110 close to the spacer 100a is 2 layers or 1 layer. The number of coil layers of the coil of the outer ring coil group 120 close to the spacer 100a is 2 layers or 1 layer.

[0085] In some implementable ways, the spacer 100a may not be provided between the inner ring coil group 110 and the outer ring coil group 120 in the embodiments of the present application. The number of coil layers on the outer side of the inner ring coil group 110 is a single-layer coil.

[0086] In the embodiments of the present application, the inner ring coil group 110 and the outer ring coil group 120 can also be electrically connected through multiple coils, that is, coils can also be provided in the spacer 100a. However, the number of coil layers on the outer side of the inner ring coil group 110 needs to be a single-layer coil to reduce the possibility that a large amount of the magnetic field generated by the inner ring coil group 110 converges in the spacer 100a, resulting in a relatively high magnetic field intensity in the spacer 100a.

[0087] Similarly, the number of coil layers on the inner side of the outer ring coil group 120 can also be a single-layer coil to reduce the possibility that the magnetic fields generated by the outer ring coil group 120 and the inner ring coil group 110 converge in the spacer 100a, resulting in a relatively high magnetic field intensity in the spacer 100a.

[0088] In some implementable ways, referring to Figures 4 to 6 As shown, the coil disk 100 of the embodiments of the present application may further include a bracket 130. The bracket 130 may be provided with a plurality of first winding grooves 131 and a plurality of second winding grooves 132. The inner ring coil group 110 may be wound in the plurality of first winding grooves 131. The outer ring coil group 120 may be wound in the plurality of second winding grooves 132. Each coil of the inner ring coil group 110 close to the notch of each first winding groove 131 is flush. Each coil of the outer ring coil group 120 close to the notch of each second winding groove 132 is flush.

[0089] A plurality of coils of the inner ring coil group 110 close to the cookware can be flush. It can be understood that if the distance between the coil and the cookware is different, the heating effect of the coil on the cookware is different. Therefore, the distances between the plurality of coils of the inner ring coil group 110 close to the cookware and the bottom of the cookware are equal, which is beneficial to the short-distance magnetic field conduction between the inner ring coil group 110 and the cookware and improves the heating efficiency.

[0090] In addition, the coils in the inner ring coil group 110 close to the cookware are flush, which can also improve the appearance neatness of the upper surface of the inner ring coil group 110.

[0091] Similarly, the distances between the multiple coils of the outer ring coil group 120 and the bottom of the cookware can be equal, which is beneficial to improving the short-distance magnetic field conduction between the outer ring coil group 120 and the cookware, improving the heating efficiency, and also improving the appearance neatness of the upper surface of the outer ring coil group 120.

[0092] In some implementable ways, as shown in Figures 4 to 6 each coil in the inner ring coil group 110 close to the notch of each first winding groove 131 is flush with each coil in the outer ring coil group 120 close to the notch of each second winding groove 132.

[0093] The coils on the side of the inner ring coil group 110 close to the cookware in the embodiment of the present application being flush with the coils on the side of the outer ring coil group 120 close to the cookware can enable short-distance magnetic field conduction between the entire coil disk 100 and the cookware, so as to improve the heating efficiency, and is also beneficial to improving the flatness of the upper surface of the entire coil disk 100.

[0094] In some implementable ways, as shown in Figures 4 to 6 the number of turns of the inner ring coil group 110 in the embodiment of the present application can be greater than or equal to the number of turns of the outer ring coil group 120.

[0095] In some implementable ways, as shown in Figure 3 the coil disk 100 in the embodiment of the present application may further include a magnetic stripe assembly 140. The magnetic stripe assembly 140 can be arranged on the bracket 130. The magnetic stripe assembly 140 can include a plurality of outer magnetic stripes 141. The plurality of outer magnetic stripes 141 can be distributed along the circumferential direction of the inner ring coil group 110. The outer magnetic stripes 141 correspond to the outer ring coil group 120.

[0096] The outer magnetic stripes 141 in the embodiment of the present application can be used to converge the magnetic field generated by the outer ring coil group 120 to act on the bottom of the cookware.

[0097] In some examples, the magnetic stripe assembly 140 may further include a long magnetic stripe 142. The long magnetic stripe 142 can correspond to the inner ring coil group 110 and the outer ring coil group 120 to converge the magnetic fields generated by the inner ring coil group 110 and the outer ring coil group 120 to the long magnetic stripe 142 and act on the bottom of the pot, thereby enhancing the magnetic fields generated by the inner ring coil group 110 and the outer ring coil group 120.

[0098] In some examples, the outer magnetic stripe 141 can be a "U" - shaped structure or an "L" - shaped structure, which is not limited in the present application.

[0099] In some examples, there may be multiple long magnetic strips 142 and outer magnetic strips 141. Along the circumferential direction of the inner ring coil group 110, the long magnetic strips 142 and the outer magnetic strips 141 may be arranged alternately.

[0100] An embodiment of the present application further provides a cooking appliance 10. Referring to Figure 1 as shown, the cooking appliance 10 may include a panel, a housing 200, and the coil disk 100 in any of the above embodiments. The coil disk 100 may be located in the internal space formed by the panel and the housing 200. A cooking pot may be placed on the panel.

[0101] It should be noted here that the numerical values and numerical ranges involved in the present application are approximate values. Affected by the manufacturing process, there may be a certain range of errors, which can be considered negligible by those skilled in the art.

[0102] In the description of the embodiments of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it may be a fixed connection or an indirect connection through an intermediate medium. It may be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific situations.

[0103] In the description of the present application, it should be understood that the terms "center", "length", "width", "thickness", "top end", "bottom end", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", "axial", "circumferential", etc. indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated position or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0104] In the embodiments of the present application or imply that the indicated device or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the embodiments of the present application. In the description of the embodiments of the present application, the meaning of "a plurality" is two or more, unless otherwise specifically and precisely defined.

[0105] The terms "first", "second", "third", "fourth", etc. (if any) in the description of the embodiments of the present application, the claims, and the above drawings are used to distinguish similar objects and do not necessarily need to describe a specific order or sequence. It should be understood that such used data can be interchanged under appropriate circumstances so that the embodiments of the present application described here, for example, can be implemented in an order other than those illustrated or described here.

[0106] In addition, the terms "comprising", "having", and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products, or apparatuses.

[0107] The term "plurality" in this document refers to two or more. The term "and / or" in this document is merely a description of the associated relationship between associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, the character " / " in this document generally represents an "or" relationship between the associated objects before and after; in a formula, the character " / " represents a "division" relationship between the associated objects before and after.

[0108] It should be understood that the various numerical numbers involved in the embodiments of this application are only for the convenience of description and are not used to limit the scope of the embodiments of this application.

[0109] It should be understood that in the embodiments of this application, the magnitudes of the sequence numbers of the above processes do not imply the order of execution. The order of execution of each process should be determined by its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of this application.

Claims

1. A coil disk (100), characterized in that, It includes a series-connected inner ring coil group (110) and an outer ring coil group (120). Along the radial direction of the inner ring coil group (110), the outer ring coil group (120) is disposed outside the inner ring coil group (110). The outer ring coil group (120) and the inner ring coil group (110) satisfy the following formula: rd = ro / ri and 1 ≤ rd ≤ 5 ro = Ro / No ri = Ri / Ni Wherein, the rd is the distribution ratio of the outer ring coil group (120) to the inner ring coil group (110), the ro is the ratio of the average radius of the outer ring coil group (120) to the number of turns of the outer ring coil group (120), the ri is the ratio of the average radius of the inner ring coil group (110) to the number of turns of the inner ring coil group (110), the Ro is the average radius of the outer ring coil group (120), the No is the number of turns of the outer ring coil group (120), the Ri is the average radius of the inner ring coil group (110), and the Ni is the number of turns of the inner ring coil group (110).

2. The coil disk (100) according to claim 1, characterized in that, There is a spacer (100a) between the outer side of the inner ring coil group (110) and the inner side of the outer ring coil group (120).

3. The coil disk (100) according to claim 1, characterized in that, The number of coil layers on the inner side of the inner ring coil group (110) is greater than the number of coil layers on the outer side of the inner ring coil group (110).

4. The coil disk (100) according to any one of claims 1 to 3, characterized in that, The number of coil layers on the outer side of the outer ring coil group (120) is greater than the number of coil layers on the inner side of the outer ring coil group (120).

5. The coil disk (100) according to claim 1, characterized in that, There is no spacer (100a) between the inner ring coil group (110) and the outer ring coil group (120), and the number of coil layers on the outer side of the inner ring coil group (110) is a single-layer coil; and / or The number of coil layers on the inner side of the outer ring coil group (120) is a single-layer coil.

6. The coil disk (100) according to claim 1, characterized in that, It further includes a bracket (130). The bracket (130) is provided with a plurality of first wire grooves (131) and a plurality of second wire grooves (132). The inner ring coil group (110) is wound in the plurality of first wire grooves (131), and the outer ring coil group (120) is wound in the plurality of second wire grooves (132). The coils of the inner ring coil group (110) near the openings of the respective first wire grooves (131) are flush with each other, and the coils of the outer ring coil group (120) near the openings of the respective second wire grooves (132) are flush with each other.

7. The coil disk (100) according to claim 6, characterized in that, The coils of the inner ring coil group (110) near the openings of the respective first wire grooves (131) are flush with the coils of the outer ring coil group (120) near the openings of the respective second wire grooves (132).

8. The coil disk (100) according to claim 1, characterized in that, The number of turns of the inner ring coil group (110) is greater than or equal to the number of turns of the outer ring coil group (120).

9. The coil disk (100) according to claim 6, characterized in that, It further includes a magnetic strip assembly (140). The magnetic strip assembly (140) is disposed on the bracket (130). The magnetic strip assembly (140) includes a plurality of outer magnetic strips (141). The plurality of outer magnetic strips (141) are distributed along the circumferential direction of the inner ring coil group (110), and the outer magnetic strips (141) correspond to the outer ring coil group (120).

10. A cooking appliance (10), characterized in that, Comprising a panel, a housing (200), and a coil disk (100) as described in any one of claims 1 to 9, the coil disk (100) being located in the internal space formed by the panel and the housing (200).

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