Electromagnetic wire coil assembly and electromagnetic cooking device
By employing a multi-layered, independently heated electromagnetic coil assembly design in the electromagnetic cooking device, the problem of uneven heating is solved, achieving a more efficient and uniform heating effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHUNMI TECHNOLOGY (SHANGHAI) CO LTD
- Filing Date
- 2025-05-09
- Publication Date
- 2026-04-21
AI Technical Summary
The heating area of the coil plate assembly in existing electromagnetic cooking devices is small, which makes it impossible to achieve independent heating control in multiple directions and at multiple levels, resulting in low heating efficiency and uneven heating.
The design employs an electromagnetic coil assembly that includes a first coil support, a second coil support, a bottom winding coil, a side winding coil, and a vertical winding coil. By independently controlling the bottom and side winding coils as well as the vertical winding coil, multi-directional and multi-level independent heating control can be achieved.
It expands the heating area, improves heating efficiency and heating uniformity, and can form stirring convection to meet different cooking needs.
Smart Images
Figure CN224154381U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electromagnetic cooking technology, specifically to an electromagnetic coil assembly and an electromagnetic cooking device. Background Technology
[0002] Electromagnetic cooking devices utilize an internal coil winding that generates a high-frequency alternating electromagnetic field when energized. This field converts electrical energy into heat energy for cooking. Existing electromagnetic cooking devices typically contain a coil support and winding coils wound around it. These winding coils are usually located at the bottom and sides of the support, with only a single coil wound around the bottom. This heating method results in a small heating area and only unidirectional convection, easily leading to uneven heating. Furthermore, existing electromagnetic coil assemblies have structural limitations, failing to achieve multi-directional, multi-layer independent heating control, resulting in low heating efficiency and difficulty in meeting diverse cooking needs. Therefore, improvements to the existing technology are urgently needed to address these issues. Utility Model Content
[0003] The purpose of this invention is to provide an electromagnetic coil assembly and an electromagnetic cooking device, which can expand the heating area, realize multi-directional and multi-level independent heating control, and improve heating efficiency and heating uniformity.
[0004] This utility model provides an electromagnetic coil assembly. The technical solution adopted is as follows: an electromagnetic coil assembly includes a first coil support, a second coil support disposed on the first coil support, a bottom winding coil and a side winding coil wound on the first coil support, a vertical winding coil wound on the second coil support, and a control main board; the first coil support includes a bottom and an annular sidewall extending circumferentially upward from the bottom edge, the bottom winding coil is wound on the bottom, the side winding coil is wound on the annular sidewall, and the bottom winding coil and the side winding coil are independently connected to the control main board to realize independent heating control.
[0005] Optionally, the second coil support is an upright cylindrical support with openings at both the top and bottom, and the lower end of the second coil support is fixedly connected to the top of the annular sidewall of the first coil support.
[0006] Optionally, the number of vertical winding coils (50) is at least one set, and at least one set of vertical winding coils (50) are wound on the outside of the second coil support (20), and the bottom winding coil, the side winding coil and the multiple sets of vertical winding coils can work independently or in concert under the control of the control motherboard.
[0007] Optionally, the bottom of the first coil support is provided with a plurality of first protrusions in the radial direction, and the annular sidewall is provided with a plurality of second protrusions in the circumferential direction. Two adjacent first protrusions form a first limiting groove for limiting the bottom winding coil, and two adjacent second protrusions form a second limiting groove for limiting the side winding coil.
[0008] Optionally, both the bottom winding coil and the side winding coil include multiple sub-coils, and at least two of the sub-coils are accommodated in both the first limiting groove and the second limiting groove.
[0009] Optionally, the outer wall of the second coil support is provided with a plurality of ribs in a concentric circle, and two adjacent ribs cooperate to form a third limiting groove for limiting the vertical winding coil.
[0010] Optionally, the electromagnetic coil assembly further includes a plurality of magnetic strips, which are evenly distributed along the circumferential direction on the outer side of the first coil support;
[0011] The radially inner end of each magnetic strip extends to the inner edge of the bottom winding coil, and the radially outer end of each magnetic strip extends to the outer edge of the vertical winding coil.
[0012] Optionally, each of the magnetic strips abuts against the opening of the first limiting groove and the second limiting groove.
[0013] Another aspect of this invention provides an electromagnetic cooking device, including the electromagnetic coil assembly described above.
[0014] Optionally, the electromagnetic cooking device is a rice cooker or a pressure cooker.
[0015] As can be seen from the above, this application expands the heating area by setting independent bottom winding coils and side winding coils on the first coil support. Combined with the vertical winding coils of the second coil support, it realizes multi-directional and regional independent heating control. During heating, stirring convection can be formed, which has the advantages of expanding the heating area, improving heating efficiency and heating uniformity. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0017] Figure 1 This is a schematic diagram of the overall structure of the utility model;
[0018] Figure 2This is a partial exploded view of this utility model;
[0019] Figure 3 This is a schematic diagram illustrating the cooperation relationship between the first coil support and the bottom winding coil and the side winding coil of this utility model;
[0020] Figure 4 yes Figure 3 A diagram showing the coils after removing the bottom and side windings;
[0021] Figure 5 This is a cross-sectional view of the present invention.
[0022] Explanation of reference numerals in the attached drawings: 10, first coil support; 11, bottom; 111, first protrusion; 112, first limiting groove; 12, annular sidewall; 121, second protrusion; 122, second limiting groove; 20, second coil support; 21, protruding rib; 22, third limiting groove; 30, bottom winding coil; 40, side winding coil; 50, vertical winding coil; 60, control main board; 70, magnetic strip. Detailed Implementation
[0023] The following will refer to the appendix in the embodiments of this utility model. Figures 1-5 The technical solutions in the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.
[0024] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.
[0025] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, if the word "and / or" appears throughout the text, it means including three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.
[0026] This utility model relates to an electromagnetic coil assembly, as shown in the reference... Figures 1-5 It includes a first coil support 10, a second coil support 20 disposed on the first coil support 10, a bottom winding coil 30 and a side winding coil 40 wound on the first coil support 10, a vertical winding coil 50 wound on the second coil support 20, and a control main board 60.
[0027] The first coil support 10 includes a bottom 11 and an annular sidewall 12 extending circumferentially upward from the edge of the bottom 11. The bottom winding coil 30 is wound on the bottom 11, and the side winding coil 40 is wound on the annular sidewall 12. The bottom winding coil 30 and the side winding coil 40 are independently connected to the control main board 60 to achieve independent heating control.
[0028] The bottom 11 of the first coil support 10 is used to contact the bottom of the pot so that the bottom of the pot can be heated by the first coil support 20. The annular side wall 12 of the first coil support 10 refers to the cylindrical structure extending upward from the outer edge of the bottom 11. The annular side wall 12 is adapted to the outer shape of the pot. By energizing the side coil support, the pot can be further heated. The independent connection between the bottom winding coil 20 and the side winding coil 40 means that each of the two coils has an independent terminal, allowing the control board 60 to apply currents of different frequencies and powers respectively.
[0029] During operation, the main board 60 applies currents of different frequencies and powers to the bottom winding coil 30 and the side winding coil 40 respectively, causing the bottom winding coil 30 and the side winding coil 40 to heat up. This achieves independent heating control of the bottom and outer areas of the pot, expanding the heating area. Compared with the existing single winding that can only form unidirectional convection, this application can form stirring convection during heating, thereby improving heating efficiency and heating uniformity.
[0030] Furthermore, the second coil support 20 is a cylindrical support that is set upright and has openings at both the top and bottom. The central axis of the second coil support 20 is perpendicular to the plane where the bottom 11 of the first coil support 10 is located. The lower end of the second coil support 20 is fixedly connected to the top end of the annular sidewall 12 of the first coil support 10.
[0031] The upright cylindrical support refers to a support component with a cylindrical structure, whose axis is perpendicular to the bottom surface of the first coil support 10, providing a stable winding space for the vertical winding coil 50. The openings at both the top and bottom of the second coil support 20 mean that the top and bottom 11 of the cylindrical support are connected. The fixed connection between the bottom of the second coil support 20 and the top of the annular sidewall 12 means that the edge of the bottom 11 of the cylindrical support is rigidly connected to the top of the annular sidewall 12 through buckles or bolts, so as to ensure the structural stability between the first coil support 10 and the second coil support 20.
[0032] Through the above technical solution, this application achieves multi-dimensional superposition of electromagnetic fields in the horizontal and vertical directions, effectively solving the problem of insufficient heating area of traditional single-layer coils. The upright structure of the second coil support 20 and the first coil support 10 forms a three-dimensional layout, enabling the winding coils in different directions to work together to generate a composite magnetic field, thereby improving the heating uniformity of the bottom 11 and sidewalls of the cookware.
[0033] Furthermore, the number of vertical winding coils 50 is at least one set, and at least one set of vertical winding coils 50 are all wound on the outer wall of the second coil support 20. The bottom winding coil 30, the side winding coil 40 and the multiple sets of vertical winding coils 50 can work independently or in concert under the control of the control main board 60.
[0034] In this utility model, the number of vertical winding coils 50 is one set. In other optional embodiments, the number of vertical winding coils 50 can also be set to two or more sets. The specific number can be adjusted according to the actual height of the pot. Two or more sets of vertical winding coils 50 are evenly wound along the height direction of the pot, thereby achieving full coverage of the side wall of the pot.
[0035] By creating an additional magnetic field perpendicular to the plane where the cookware is placed, the heating coverage of the cookware's sidewalls is enhanced. Multiple heating modes can be combined by independently controlling the current flow and power distribution of each coil. Independent or collaborative operation means that each coil can be energized individually to generate a local magnetic field, or it can be energized alternately or superimposed according to a preset sequence to form a composite magnetic field of different intensities and directions.
[0036] Specifically, after the vertical winding coil 50 is wound on the outer wall of the second coil support 20, its magnetic field lines are distributed longitudinally, forming a spatial complement to the transverse magnetic field of the bottom winding coil 30 and the inclined magnetic field of the side winding coil 40. When the bottom winding coil 30 is energized alone, the magnetic field lines mainly penetrate the bottom surface of the cookware; when the vertical winding coil 50 and the side winding coil 40 are energized together, the magnetic field lines act simultaneously on the bottom surface and the upper middle part of the side wall of the cookware.
[0037] Compared to existing technologies, current coils only have a single layer of winding at the bottom 11 and on the side walls, limiting the magnetic field distribution to the bottom and lower side walls of the cookware and failing to cover the upper and middle areas of deep cookware. This solution expands the magnetic field coverage vertically by adding a vertical winding coil 50, and simultaneously enables dynamic combination of multiple coils through the control board 60, allowing the magnetic field strength and direction to be adjusted in real time according to the shape of the cookware.
[0038] Furthermore, the bottom 11 of the first coil support 10 is provided with a plurality of first protrusions 111 radially, and the annular sidewall 12 is provided with a plurality of second protrusions 121 circumferentially. The first protrusions 111 and the second protrusions 121 are both vertically downward. Two adjacent first protrusions 111 form a first limiting groove 112 that limits the bottom winding coil 30, and two adjacent second protrusions 121 form a second limiting groove 122 that limits the side winding coil 40.
[0039] In this utility model, multiple first protrusions 111 and multiple second protrusions 121 form multiple concentric circle structures on the bottom 11 and the annular sidewall 12 of the first coil support 10, respectively, which are compact in layout and convenient for winding the coil.
[0040] Understandably, embedding the bottom winding coil 30 and the side winding coil 40 into the first limiting groove 112 formed by the first protrusion 111 and the second limiting groove 122 formed by the second protrusion 121 respectively limits and fixes the bottom winding coil 30 and the side winding coil 40, effectively preventing radial displacement of the bottom winding coil 30 and the side winding coil 40 when heated or vibrating. Compared with the traditional coil support method that uses a planar structure or simple groove to fix the coil, which is difficult to maintain a stable coil arrangement under high temperature and electromagnetic vibration conditions, this solution uses the first protrusion 111 and the second protrusion 121 to form the first limiting groove 112 and the second limiting groove 122 with a binding force, which enhances the mechanical fixing effect of the bottom winding coil 30 and the side winding coil 40, thereby ensuring heating efficiency and heating uniformity.
[0041] Furthermore, both the bottom winding coil 30 and the side winding coil 40 include multiple sub-coils, and at least two sub-coils are accommodated in both the first limiting slot 112 and the second limiting slot 122.
[0042] By splitting the bottom winding coil 30 and the side winding coil 40 into multiple sub-coils and arranging them in the first limiting groove 112 and the second limiting groove 122 respectively, and by placing at least two sub-coils in the first limiting groove 112 and the second limiting groove 122, the winding density of the bottom winding coil 30 and the side winding coil 40 is increased, the heating area is expanded, and the heating areas of the bottom 11 and the side 12 of the heating area can form multi-directional heat convection, thereby improving heating efficiency and heating uniformity.
[0043] Furthermore, the outer wall of the second coil support 20 is provided with a plurality of ribs 21 in a concentric circle, and two adjacent ribs 21 cooperate to form a third limiting groove 22 for limiting the vertical winding coil 50.
[0044] Multiple ribs 21 also form multiple concentric circle structures on the outside of the second coil support 20, and the gap between adjacent concentric circles is the third limiting groove 22 used to limit the vertical coil 50.
[0045] Understandably, by providing multiple ribs 21 on the side wall of the second coil support 20, and forming a third limiting groove 22 between adjacent ribs 21 for limiting the vertical winding coil 50, the vertical winding coil 50 is formed in a tightly arranged winding shape on the outer side wall of the second coil, thus avoiding the vertical winding coil 50 from shifting its position due to thermal expansion or mechanical vibration.
[0046] Furthermore, the electromagnetic coil assembly also includes a plurality of magnetic strips 70, which are evenly distributed circumferentially on the outer side of the first coil support 10. The radial inner end of each magnetic strip 70 extends to the inner edge of the bottom winding coil 30, and the radial outer end of each magnetic strip 70 extends to the outer edge of the vertical winding coil 50.
[0047] In this invention, there are five magnetic strips 70, which are evenly distributed on the outside of the first coil support 10 to achieve full coverage of the bottom 11 and the annular sidewall 12 of the first coil support 10. The magnetic strips 70 are used to suppress the outward divergence of the magnetic field and enhance the magnetic field strength in the central region, thereby improving the heating efficiency.
[0048] Specifically, when the bottom winding coil 30, the side winding coil 40 and the vertically extending winding coil are energized, the magnetic strip 70 confines the magnetic field generated by the above coils to the central region of the first coil support 10 through magnetic conduction, while blocking the magnetic field from spreading to the external space.
[0049] Furthermore, each magnetic strip 70 abuts against the opening of the first limiting groove 112 and the second limiting groove 122.
[0050] The magnetic strip 70 abuts against the openings of the first limiting groove 112 and the second limiting groove 122, meaning that the magnetic strip 70 closes the first limiting groove 112 and the second limiting groove 122. This not only positions the magnetic strip 70 but also closes the first limiting groove 112 and the second limiting groove 122, thereby ensuring that the bottom winding coil 30 and the side winding coil 40 are stably located within the first limiting groove 112 and the second limiting groove 122. This further improves the stability of the bottom winding coil 30 and the side winding coil 40 and prevents the bottom winding coil 30 and the side winding coil 40 from shifting their positions due to thermal expansion or mechanical vibration.
[0051] Furthermore, the diameter of the annular sidewall 12 gradually increases from bottom to top along its central axis.
[0052] By setting the diameter of the annular sidewall 12 to gradually increase from bottom to top along its central axis, i.e., the diameter of the annular sidewall 12 continuously expands with increasing height starting from the edge of the bottom 11, a gradually expanding profile is formed. This structure allows the side winding coil 40 to be wound at multiple angles along the inclined surface of the annular sidewall 12, and the coverage area of the side winding coil 40 expands with increasing height. In the energized state, the gradually expanding annular sidewall 12 extends the range of electromagnetic field action in the vertical direction, and the magnetic field distribution gradient fits more closely with the curved surface of the cookware.
[0053] The second aspect of this utility model also provides an electromagnetic cooking device, including a main body, a cookware, and an electromagnetic coil assembly as described in any one of the first aspects of this utility model, wherein the electromagnetic coil assembly is disposed inside the main body, and the cookware is disposed inside the electromagnetic coil assembly, that is, the cookware is disposed inside the first coil support 10 and the second coil support 20.
[0054] In this invention, the electromagnetic cooking device is a rice cooker, pressure cooker, or other cooking device that uses a high-frequency alternating electromagnetic field to convert electrical energy into heat energy from the cookware to cook food.
[0055] To better illustrate the technical solutions of the first and second aspects of this utility model, the present utility model provides an exemplary embodiment for each aspect as follows:
[0056] <Example 1>
[0057] Embodiment 1 of this utility model provides an electromagnetic coil assembly, including a first coil support 10, a second coil support 20, a bottom winding coil 30 and a side winding coil 40 wound on the first coil support 10, a vertical winding coil 50 wound on the second coil support 20, and a control main board 60.
[0058] The first coil support 10 includes a bottom 11 and an annular sidewall 12 extending circumferentially upward from the edge of the bottom 11. The bottom winding coil 30 is wound on the bottom 11, and the side winding coil 40 is wound on the annular sidewall 12. The bottom winding coil 30 and the side winding coil 40 are independently connected to the control main board 60 to achieve independent heating control.
[0059] <Example 2>
[0060] Based on Embodiment 1 of this utility model, the electromagnetic cooking device is a rice cooker, pressure cooker, or other cooking device that uses a high-frequency alternating electromagnetic field to convert electrical energy into the heat energy of the cookware to cook food.
[0061] The above is only used to illustrate the technical solution of this utility model and not to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.
Claims
1. An electromagnetic wire disc assembly, characterized by, It includes a first coil support (10), a second coil support (20) disposed on the first coil support (10), a bottom winding coil (30) and a side winding coil (40) wound on the first coil support (10), a vertical winding coil (50) wound on the second coil support (20), and a control main board (60); The first coil support (10) includes a bottom (11) and an annular sidewall (12) extending circumferentially upward from the edge of the bottom (11). The bottom winding coil (30) is wound around the bottom (11), and the side winding coil (40) is wound around the annular sidewall (12). The bottom winding coil (30) and the side winding coil (40) are respectively independently connected to the control main board (60) to realize independent heating control.
2. The electromagnetic wire disc assembly of claim 1, wherein, The second coil support (20) is a cylindrical support that is set upright and has openings at both the top and bottom. The lower end of the second coil support (20) is fixedly connected to the top of the annular sidewall (12).
3. The electromagnetic wire disc assembly of claim 2, wherein, The number of the vertical winding coils (50) is at least one set, and at least one set of the vertical winding coils (50) are all wound on the outside of the second coil support (20). The bottom winding coil (30), the side winding coil (40) and the multiple sets of the vertical winding coils (50) can work independently or in concert under the control of the control motherboard (60).
4. The electromagnetic wire disc assembly of claim 1, wherein, The bottom (11) of the first coil support (10) is provided with a plurality of first protrusions (111) in the radial direction, and the annular sidewall (12) is provided with a plurality of second protrusions (121) in the circumferential direction. Two adjacent first protrusions (111) form a first limiting groove (112) that limits the bottom winding coil (30), and two adjacent second protrusions (121) form a second limiting groove (122) that limits the side winding coil (40).
5. The electromagnetic wire disc assembly of claim 4, wherein, Both the bottom winding coil (30) and the side winding coil (40) include multiple sub-coils, and at least two of the sub-coils are accommodated in both the first limiting groove (112) and the second limiting groove (122).
6. The electromagnetic wire disc assembly of claim 5, wherein, The outer wall of the second coil support (20) is provided with a plurality of ribs (21) in a concentric circle, and two adjacent ribs (21) cooperate to form a third limiting groove (22) for limiting the vertical winding coil (50).
7. The electromagnetic wire disc assembly of claim 4, wherein, The electromagnetic coil assembly also includes a plurality of magnetic strips (70), which are evenly distributed in the circumferential direction on the outside of the first coil support (10). The radial inner end of each magnetic strip (70) extends to the inner edge of the bottom winding coil (30), and the radial outer end of each magnetic strip (70) extends to the outer edge of the vertical winding coil (50).
8. The electromagnetic wire disc assembly of claim 7, wherein, Each of the magnetic strips (70) abuts against the openings of the first limiting groove (112) and the second limiting groove (122).
9. An electromagnetic cooking device, characterized by Includes the electromagnetic coil assembly as described in any one of claims 1-8.
10. The electromagnetic cooking device according to claim 9, characterized in that, The electromagnetic cooking device is a rice cooker or a pressure cooker.