Heating device and heating method of pancake electromagnetic range

Abstract

The invention discloses a heating device and a heating method of a pancake electromagnetic range, the device comprises a pan-shaped bracket, a magnetic gathering assembly and a heating coil, the surface of the pan-shaped bracket is spirally wound with a heating coil, the bottom of the pan-shaped bracket is provided with a heating machine core, and the heating machine core is used for providing alternating current for the heating coil to drive the heating coil to generate an alternating magnetic field; the magnetism gathering assembly comprises a guide ring and a rotating ring rotating in a reciprocating mode, a plurality of arc-shaped mounting frames are arranged on the outer side of the rotating ring in the circumferential direction, and a plurality of magnetic blocks are arranged in the middles of the arc-shaped mounting frames in the tangential direction. On the basis of directional magnetism gathering of the magnetic block, dispersed magnetic induction lines generated by the heating coil are gathered in a targeted mode, so that the magnetic field intensity of key heating areas such as the edge of the cookware is improved, the magnetic block is driven by the rotating ring to rotate in a reciprocating mode, and the relative position and angle between the magnetic block and the heating coil are changed. The magnetic flux penetrating through the heating coil is periodically changed to improve the uniformity of the edge magnetic field of the heating coil, so that the cooking requirement of no temperature difference in the whole area is met.

Description

Technical Field

[0001] This invention belongs to the field of electromagnetic cooker technology, and particularly relates to the heating device of the electromagnetic cooker for making steamed buns, as well as the heating method of the electromagnetic cooker for making steamed buns. Background Technology

[0002] As a traditional specialty food, Guobianmo (a type of flatbread) requires continuous and even heating of the edge of the pan during cooking to ensure that the part of the flatbread touching the edge is thoroughly cooked and crispy. Using an induction cooker to make Guobianmo is an innovative choice in the catering industry in recent years. Induction cookers use the principle of electromagnetic induction, and the magnetic field generated by the heating coil causes the pan itself to generate eddy currents and heat up. Compared with ordinary wood-fired stoves, it has the core advantages of high efficiency, safety, and precise temperature control.

[0003] The spiral-wound heating coil will create an extreme magnetic field distribution of "too strong in the center and too weak at the edges". Due to the lack of guidance, optimization and adaptation design for the magnetic field, the inherent defects of electromagnetic heating will be fully exposed, and it will be unable to meet the cooking requirements of no temperature difference in the whole area. Summary of the Invention

[0004] This invention addresses the problem in existing technologies where spirally wound heating coils create an extreme magnetic field distribution that is "too strong at the center and too weak at the edges," failing to meet the cooking requirement of uniform temperature across the entire area. The invention proposes the following technical solution: The heating device for the induction cooker used for making steamed buns includes: A pot-shaped support is used to support metal pots. A heating coil is spirally wound on the surface of the pot-shaped support. A heating element is provided at the bottom of the pot-shaped support. The heating element is used to provide alternating current to the heating coil to drive it to generate an alternating magnetic field. A magnetic focusing assembly is located inside a pot-shaped bracket. The magnetic focusing assembly includes a guide ring and a reciprocating rotating ring. Multiple arc-shaped mounting brackets are arranged circumferentially on the outer side of the rotating ring, and multiple magnetic blocks are arranged in the middle of the arc-shaped mounting brackets along the tangential direction.

[0005] The magnetic blocks are used to gather the magnetic field lines generated by the heating coil to enhance the magnetic field strength of the corresponding area of ​​the metal cookware. The reciprocating rotation of the rotating ring drives the arc-shaped mounting bracket to move, and the multiple magnetic blocks reciprocate along the circumference of the pot-shaped bracket and change their relative position and angle with the heating coil. This periodically changes the magnetic flux passing through the heating coil to improve the uniformity of the magnetic field at the edge of the heating coil.

[0006] As a preferred embodiment of the above technical solution, the magnetic focusing assembly further includes an adjusting component for adjusting the position of the magnetic block. The adjusting component includes a bevel ring and multiple lead screws. The bevel ring is fixedly connected to the bottom of the pot-shaped bracket and is concentrically arranged with the pot-shaped bracket. One end of the lead screw is provided with a first bevel gear, one of which meshes with the bevel ring. The other end of the lead screw is provided with a second bevel gear, which meshes with an adjacent first bevel gear. The lead screw is arranged parallel to the corresponding magnetic block. A slider fixedly connected to the corresponding magnetic block is threaded onto the surface of the lead screw. When the first bevel gear moves with the arc-shaped mounting bracket, it is pushed to rotate by the corresponding bevel ring. Under the transmission of the second bevel gear, multiple lead screws rotate simultaneously, moving the slider to adapt to the gradual change in the pitch of the heating coil.

[0007] As a preferred embodiment of the above technical solution, all of the aforementioned lead screws are equal pitch lead screws, and the pitch of the multiple lead screws is distributed in an increasing gradient towards the direction away from the pot-shaped bracket.

[0008] As a preferred embodiment of the above technical solution, the rotation angle of the rotating ring is 0-60 degrees, and both the rotating ring and the guide ring are concentrically arranged with the pot-shaped support.

[0009] As a preferred embodiment of the above technical solution, the magnetic focusing component further includes a driving component, which includes a forward and reverse rotating motor, and the forward and reverse rotating motor is connected to the rotating ring via a transmission belt.

[0010] As a preferred embodiment of the above technical solution, the pot-shaped bracket includes an upper fixing ring, a lower fixing ring, and multiple circumferentially arranged arc-shaped support frames, the surface of which is provided with several placement slots for placing heating coils.

[0011] As a preferred embodiment of the above technical solution, the arc-shaped support frame has a groove in the middle that matches the arc-shaped mounting frame, and the center of the arc-shaped support frame is the same as that of the arc-shaped mounting frame.

[0012] The heating method of the heating device of the induction cooker for making steamed buns includes the following steps: S1. Start Preheating: Start the heating element, which provides alternating current to the heating coil. The heating coil generates an alternating magnetic field to preheat the cookware. S2. Circumferential sweeping magnetization: The rotating ring rotates clockwise along the guide ring, driving the arc-shaped mounting bracket to rotate synchronously. The magnetic block on the arc-shaped mounting bracket reciprocates along the circumference of the heating coil. S3. Radial Precision Adjustment: When the rotating ring rotates to a specific angle, the first bevel gear at the end of the lead screw meshes with the bevel ring, the bevel ring remains stationary, and the rotating first bevel gear is driven to rotate by the bevel ring; the first bevel gear drives the adjacent lead screw to rotate synchronously through the second bevel gear, the lead screw drives the slider to move radially away from the center of the pot, and the slider drives the magnetic block to move synchronously. S4. Reciprocating cycle heating: When the rotating ring rotates to the maximum deflection angle, it returns counterclockwise. During the return process, the lead screw rotates in the opposite direction, and the slider drives the magnetic block to move radially closer to the center of the pot until it returns to the initial position. Repeat steps S3-S4 to make the magnetic block continuously "reciprocate rotation + radial movement". S5. Stop heating: Once the pan-fried buns are cooked, turn off the heating element and the forward and reverse motors to complete the heating process.

[0013] The beneficial effects of this invention are as follows: 1. Based on the directional magnetic focusing of the magnetic block, the magnetic block is set along the tangent direction of the arc mounting bracket, which can specifically gather the dispersed magnetic field lines generated by the heating coil, thereby increasing the magnetic field strength in key heating areas such as the edge of the pot. Furthermore, the rotating ring drives the magnetic block to rotate back and forth, changing the relative position and angle between it and the heating coil. This periodically changes the magnetic flux passing through the heating coil, improving the uniformity of the magnetic field at the edge of the heating coil, thus achieving the cooking requirement of no temperature difference throughout the entire area. 2. The adjustment mechanism utilizes the reciprocating kinetic energy of the rotating ring to achieve radial linkage without additional drive. As the first bevel gear moves with the arc-shaped mounting bracket, it is pushed to rotate by the corresponding bevel gear ring. Under the transmission of the second bevel gear, multiple lead screws rotate simultaneously, moving the slider. The magnetic block then moves towards or away from the center of the pot. The linkage design of "circumferential rotation - radial movement" can eliminate the "discontinuity" of the radial magnetic field, making the magnetic field strength gradient from the center of the pot to the edge change smoothly to avoid "radial magnetic field unevenness", thereby heating the inside of the pot evenly. 3. By using a design where "multiple equal-pitch lead screws increase in pitch away from the center of the pot", the movement distance of the magnetic blocks in different radial directions is precisely matched with the radial pitch gradient of the spiral coil. The movement distance of the magnetic blocks in the central area is small, while the movement distance in the edge area is large. This not only meets the differentiated heating needs of the center and edge of the steamed buns, but also avoids the problem of "magnetic block misalignment and inability to align the coil gap" caused by a uniform pitch lead screw. This forms a third layer of synergy of "adjustment-adaptation", further reducing the internal temperature difference of the pot. Attached Figure Description

[0014] Figure 1 The diagram shown is a schematic representation of the overall structure of the embodiment; Figure 2 The image shown is a front view of the magnetic focusing component in the embodiment; Figure 3 The image shown is a front sectional view of the magnetic focusing component in the embodiment; Figure 4 The diagram shown illustrates the installation position of the adjustment component in the embodiment. Figure 5 The diagram shown is a schematic representation of the various parts of the adjustment component in the embodiment; Figure 6The image shown is a front view of the pot-shaped bracket in the embodiment.

[0015] In the diagram: 11. Upper fixing ring; 12. Arc-shaped support frame; 121. Placement slot; 122. Groove; 13. Lower fixing ring; 21. Guide ring; 22. Rotating ring; 23. Arc-shaped mounting frame; 24. Magnetic block; 25. Adjusting component; 251. Bevel gear ring; 252. Lead screw; 253. First bevel gear; 254. Second bevel gear; 255. Slider. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings.

[0017] Example 1 Figures 1-6 The heating device of the induction cooker for making steamed buns includes: A pot-shaped support is used to support metal pots. A heating coil is spirally wound on the surface of the pot-shaped support. A heating element is provided at the bottom of the pot-shaped support. The heating element is used to provide alternating current to the heating coil to drive it to generate an alternating magnetic field. A magnetic focusing assembly is located inside a pot-shaped bracket. The magnetic focusing assembly includes a guide ring 21 and a reciprocating rotating ring 22. Multiple arc-shaped mounting brackets 23 are arranged circumferentially on the outer side of the rotating ring 22, and multiple magnetic blocks 24 are arranged in the middle of the arc-shaped mounting brackets 23 along the tangential direction.

[0018] The magnetic block 24 is used to gather the magnetic field lines generated by the heating coil to enhance the magnetic field strength of the corresponding area of ​​the metal pot. The rotating ring 22 reciprocates and drives the arc-shaped mounting bracket 23 to move. The multiple magnetic blocks 24 then reciprocate along the circumference of the pot bracket and change their relative position and angle with the heating coil. This periodically changes the magnetic flux passing through the heating coil to improve the uniformity of the magnetic field at the edge of the heating coil.

[0019] The rotation angle of the rotating ring 22 is 0-60 degrees, and both the rotating ring 22 and the guide ring 21 are concentrically arranged with the pot-shaped bracket.

[0020] The magnetic focusing component also includes a driving component, which includes a forward and reverse rotating motor. The forward and reverse rotating motor is connected to the rotating ring 22 via a transmission belt. In this technical solution, the driving component is not shown in the figure as it is an existing device. The function of the transmission belt is to place the forward and reverse rotating motor in an area away from the heating, so as to avoid the heating coil from affecting the forward and reverse rotating motor during operation.

[0021] Based on the directional magnetic focusing of the magnetic block 24, the magnetic block 24 is set along the tangential direction of the arc-shaped mounting bracket 23, which can specifically gather the dispersed magnetic field lines generated by the heating coil, thereby increasing the magnetic field strength of key heating areas such as the edge of the pot. Furthermore, the rotating ring 22 drives the magnetic block 24 to rotate back and forth, changing the relative position and angle between it and the heating coil. This periodically changes the magnetic flux passing through the heating coil, improving the uniformity of the magnetic field at the edge of the heating coil, thus achieving the cooking requirement of no temperature difference throughout the entire area.

[0022] The reciprocating rotation of the magnetic block (angle range 0-60 degrees, periodically forward and reverse) causes periodic changes in the relative position, angle, and magnetic field strength between the magnetic field it generates and the heating coil, triggering three key chain effects: (1). The magnetic flux passing through the coil fluctuates periodically. The magnetic block (strong magnet) will converge the magnetic field lines generated by the heating coil itself (enhancing the local magnetic field strength). At the same time, its rotation will change the angle between the magnetic field and the coil plane, causing the magnetic flux Φ passing through the coil to change periodically with time.

[0023] Magnetic flux Φ is a function of magnetic field strength B, effective area S of the coil, and angle θ between the magnetic field and the plane of the coil. N: Number of turns in the heating coil; B(t): The magnetic field strength after the magnetic block is magnetized (it changes due to the change in the position of the magnetic block, B(t) = k * B0, where k is the magnetization coefficient and B0 is the magnetic field strength of the coil itself). S 有效 (t): The effective area of ​​the magnetic field overlapping between the coil and the magnetic block (changes due to the positional shift of the rotating magnetic block; after adjusting the coil pitch using the adjusting component, S) 有效 (Fluctuation decreased) θ(t): The angle between the magnetic field of the magnetic block and the plane of the coil (when rotating back and forth, θ(t) = θ max *sin(2πft), where θ max ≤60° is the maximum rotation angle, f is the rotation frequency. Therefore, it can be concluded that when the magnetic block reciprocates, the periodic changes in θ(t) and B(t) cause Φ(t) to fluctuate sinusoidally, and the amplitude of the fluctuation is related to θ. max f and k are positively correlated.

[0024] (2). Fluctuation of induced electromotive force (back electromotive force) in coil According to the law of electromagnetic induction, the change of magnetic flux will generate an induced electromotive force in the coil. This electromotive force will hinder the change of coil current, resulting in fluctuation of the actual working current of the coil.

[0025] According to Faraday's law of electromagnetic induction, the induced electromotive force ε(t) generated in the coil is proportional to the rate of change of magnetic flux: The induced electromotive force ε(t) varies with the rotational frequency f and the maximum angle θ max As the voltage increases, its periodic fluctuations will offset part of the power supply voltage, causing the actual operating current of the coil, I(t) = (U−ε(t)) / Z(t) (where Z is the coil impedance), to fluctuate.

[0026] (3) The dynamic change of coil inductance value. The rotation of the magnetic block changes the permeability around the coil (the high permeability area of ​​the magnetic block material periodically moves closer to / away from the coil), causing the coil inductance value L to change periodically with the position of the magnetic block, which in turn affects the impedance characteristics of the coil.

[0027] Coil Inductance L is positively correlated with the surrounding magnetic permeability μ (the high magnetic permeability of the magnetic block will change μ): Where μ0 is the vacuum permeability; μ r (t): Relative permeability (μ when the magnetic block is close) r Increase, move away from μ r (Decreases, changes periodically with rotation); S 线圈 : Cross-sectional area of ​​the coil; l 磁路 : Magnetic field path length.

[0028] (4). The periodic change of eddy current power in the cookware. The rate of change of magnetic flux directly determines the strength of the eddy current in the cookware. The fluctuation of the rate of change of magnetic flux caused by the rotation of the magnetic block will cause the heating power (eddy current heat generation) to fluctuate periodically.

[0029] The heating power P originates from the Joule heat of the eddy currents in the cookware, and the intensity of the eddy currents is proportional to the rate of change of magnetic flux. Therefore, eddy current power: Combining the rate of change of magnetic flux, the fluctuation law of Φ(t) is as follows: therefore: Heating power P(t) varies with rotational frequency f and maximum angle θ max It grows squared and exhibits periodic fluctuations (frequency 2f), with the fluctuation amplitude changing from θ. max The larger the angle, the more pronounced the fluctuation.

[0030] Ultimately, it achieved the synergistic effect of "local magnetic field enhancement (improving heating efficiency) + periodic sweeping (improving edge uniformity)," overcoming the problem of insufficient edge heating in traditional induction cookers.

[0031] Figures 1-5 The magnetic focusing assembly further includes an adjusting component 25, which is used to adjust the position of the magnetic block 24. The adjusting component 25 includes a bevel ring 251 and multiple lead screws 252. The bevel ring 251 is fixedly connected to the bottom of the pot-shaped bracket and is concentrically arranged with the pot-shaped bracket. One end of each lead screw 252 is provided with a first bevel gear 253, one of which meshes with the bevel ring 251. The other end of each lead screw 252 is provided with a second bevel gear 252. 4. The second bevel gear 254 meshes with the adjacent first bevel gear 253. The lead screw 252 is arranged parallel to the corresponding magnetic block 24. The surface of the lead screw 252 is threaded with a slider 255 that is fixedly connected to the corresponding magnetic block 24. When the first bevel gear 253 moves with the arc-shaped mounting bracket 23, it is pushed to rotate by the corresponding bevel ring 251. Under the transmission of the second bevel gear 254, multiple lead screws 252 rotate simultaneously to move the slider 255, adapting to the gradual change of the pitch of the heating coil.

[0032] The adjustment component 25 achieves radial linkage without additional drive by utilizing the reciprocating rotational kinetic energy of the rotating ring 22. When the first bevel gear 253 moves with the arc-shaped mounting bracket 23, it is pushed to rotate by the corresponding bevel gear ring 251. Under the transmission of the second bevel gear 254, multiple lead screws 252 rotate simultaneously, moving the slider 255. The magnetic block 24 then moves towards or away from the center of the pot. The linkage design of "circumferential rotation - radial movement" can eliminate the "discontinuity" of the radial magnetic field, making the magnetic field intensity gradient from the center of the pot to the edge change smoothly to avoid "radial magnetic field unevenness", thereby heating the inside of the pot evenly.

[0033] Spatial decay variation of magnetic field strength B: The radial distance r(t) between the magnetic block and the coil changes, and the magnetic field strength decays with distance, resulting in periodic fluctuations of B(t) at the coil. Changes in the coupling area between the magnetic field and the coil: Changes in the circumferential angle φ(t) alter the overlap area (effective area S(t)) between the magnetic block and each turn of the coil. In particular, the pitch of the helical coil gradually changes, requiring adaptation through radial movement to reduce the drastic fluctuations in S(t). Dynamic changes in magnetic circuit reluctance: The movement of the magnetic block changes the distribution of the high permeability region around the coil, causing the magnetic circuit reluctance R_m(t) to change periodically, which in turn affects the coil inductance L(t).

[0034] Figure 3 and Figure 5In this configuration, all of the lead screws 252 are equal pitch lead screws 252, and the pitch of the multiple lead screws 252 is distributed in an increasing gradient towards the direction away from the pot-shaped bracket.

[0035] By using a design where "multiple equal-pitch lead screws 252 increase in pitch away from the center of the pot", the movement distance of the magnetic blocks 24 in different radial directions is precisely matched with the radial pitch gradient of the spiral coil. The movement distance of the magnetic blocks 24 in the central area is small, while the movement distance in the edge area is large. This not only meets the differentiated heating needs of the center and edge of the steamed buns, but also avoids the problem of "magnetic blocks 24 being misaligned and unable to align with the coil gap" caused by the uniform pitch lead screws 252. This forms a third layer of synergy of "adjustment-adaptation", further reducing the internal temperature difference of the pot.

[0036] The pot-shaped bracket includes an upper fixing ring 11, a lower fixing ring 13, and multiple circumferentially arranged arc-shaped support frames 12. The surface of the arc-shaped support frame 12 is provided with several placement slots 121 for placing heating coils.

[0037] The arc-shaped support frame 12 has a groove 122 in the middle that matches the arc-shaped mounting frame 23, and the center of the arc-shaped support frame 12 is the same as that of the arc-shaped mounting frame 23.

[0038] Example 2 The heating method of the heating device of the induction cooker for making steamed buns includes the following steps: S1. Start Preheating: Start the heating element, which provides alternating current to the heating coil. The heating coil generates an alternating magnetic field to preheat the cookware. S2. Circumferential sweeping magnetization: The rotating ring 22 rotates clockwise along the guide ring 21, driving the arc-shaped mounting bracket 23 to rotate synchronously. The magnetic block 24 on the arc-shaped mounting bracket 23 reciprocates along the circumferential direction of the heating coil. S3. Radial Precision Adjustment: When the rotating ring 22 rotates to a specific angle, the first bevel gear 253 at the end of the lead screw 252 meshes with the bevel ring 251. The bevel ring 251 remains fixed, and the rotating first bevel gear 253 is driven to rotate by the bevel ring 251. The first bevel gear 253 drives the adjacent lead screw 252 to rotate synchronously through the second bevel gear 254. The lead screw 252 drives the slider 255 to move radially away from the center of the pot. The slider 255 drives the magnetic block 24 to move synchronously. S4. Reciprocating cycle heating: When the rotating ring 22 rotates to the maximum deflection angle, it returns counterclockwise. During the return process, the lead screw 252 rotates in the opposite direction, and the slider 255 drives the magnetic block 24 to move radially closer to the center of the pot until it returns to the initial position. Repeat steps S3-S4 to make the magnetic block 24 continuously "reciprocate rotation + radial movement". S5. Stop heating: Once the pan-fried buns are cooked, turn off the heating element and the forward and reverse motors to complete the heating process.

[0039] In this technical solution, through the layer-by-layer synergy of magnetic block 24, rotating ring 22, adjusting component 25, and gradient pitch screw 252, the core pain points of traditional technology such as "uneven magnetic field, insufficient heating differentiation, and low reliability" are solved. At the same time, the function is integrated through pure mechanical linkage, which ultimately reduces the temperature difference between the center and the edge of the pot to approximately equal, and is fully adapted to the cooking needs of pot-side steamed buns.

[0040] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it.

Claims

1. A heating device for a pot edge electromagnetic range, characterized in that, include: A pot-shaped support is used to support metal pots. A heating coil is spirally wound on the surface of the pot-shaped support. A heating element is provided at the bottom of the pot-shaped support. The heating element is used to provide alternating current to the heating coil to drive it to generate an alternating magnetic field. A magnetic focusing assembly is located inside a pot-shaped bracket. The magnetic focusing assembly includes a guide ring (21) and a reciprocating rotating ring (22). Multiple arc-shaped mounting brackets (23) are arranged circumferentially on the outer side of the rotating ring (22). Multiple magnetic blocks (24) are arranged in the middle of the arc-shaped mounting brackets (23) along the tangential direction. The magnetic blocks (24) are used to gather the magnetic field lines generated by the heating coil to enhance the magnetic field strength of the corresponding area of ​​the metal pot. The rotating ring (22) rotates back and forth, driving the arc-shaped mounting bracket (23) to move. The multiple magnetic blocks (24) then rotate back and forth along the circumference of the pot bracket and change their relative position and angle with the heating coil, so that the magnetic flux passing through the heating coil changes periodically to improve the uniformity of the magnetic field at the edge of the heating coil.

2. The heating device of the pot edge electromagnetic range according to claim 1, characterized in that, The magnetic focusing assembly also includes an adjusting component (25) for adjusting the position of the magnetic block (24). The adjusting component (25) includes a bevel ring (251) and multiple lead screws (252). The bevel ring (251) is fixedly connected to the bottom of the pot-shaped bracket and is concentrically arranged with the pot-shaped bracket. One end of the lead screw (252) is provided with a first bevel gear (253), one of which meshes with the bevel ring (251). The other end of the lead screw (252) is provided with a second bevel gear (254). The second bevel gear (254) meshes with the adjacent first bevel gear (253). The lead screw (252) is arranged parallel to the corresponding magnetic block (24). The lead screw (252) has a threaded sleeve with a slider (255) that is fixedly connected to the corresponding magnetic block (24). When the first bevel gear (253) moves with the arc-shaped mounting bracket (23), it is pushed to rotate by the corresponding bevel ring (251). Under the transmission of the second bevel gear (254), multiple lead screws (252) rotate simultaneously to move the slider (255), adapting to the gradual change of the pitch of the heating coil.

3. The heating device of the pot edge electromagnetic range according to claim 2, characterized in that, The plurality of lead screws (252) are all equal pitch lead screws (252), and the pitch of the plurality of lead screws (252) is distributed in an increasing gradient in the direction away from the pot-shaped bracket.

4. The heating device of the pot edge electromagnetic range according to claim 1, characterized in that, The rotation angle of the rotating ring (22) is 0-60 degrees, and both the rotating ring (22) and the guide ring (21) are concentrically arranged with the pot-shaped bracket.

5. The heating device for the induction cooker for making steamed buns according to claim 4, characterized in that, The magnetic focusing component also includes a driving component, which includes a forward and reverse rotating motor, which is connected to the rotating ring (22) via a transmission belt.

6. The heating device for the induction cooker for making steamed buns according to claim 2, characterized in that, The pot-shaped bracket includes an upper fixing ring (11), a lower fixing ring (13), and multiple circumferentially arranged arc-shaped support frames (12). The surface of the arc-shaped support frame (12) is provided with several placement slots (121) for placing heating coils.

7. The heating device for the induction cooker for making steamed buns according to claim 6, characterized in that, The arc-shaped support frame (12) has a groove (122) in the middle that matches the arc-shaped mounting frame (23), and the center of the arc-shaped support frame (12) is the same as that of the arc-shaped mounting frame (23).

8. The heating method of the heating device for the electric stove used for making steamed buns according to any one of claims 1-7, characterized in that, Includes the following steps: S1. Start Preheating: Start the heating element, which provides alternating current to the heating coil. The heating coil generates an alternating magnetic field to preheat the cookware. S2. Circumferential sweeping magnetization: The rotating ring (22) rotates clockwise along the guide ring (21) to drive the arc-shaped mounting bracket (23) to rotate synchronously, and the magnetic block (24) on the arc-shaped mounting bracket (23) reciprocates along the circumferential direction of the heating coil; S3. Radial Precision Adjustment: When the rotating ring (22) rotates to a specific angle, the first bevel gear (253) at the end of the lead screw (252) meshes with the bevel ring (251), the bevel ring (251) remains fixed, and the rotating first bevel gear (253) is driven to rotate by the bevel ring (251); the first bevel gear (253) drives the adjacent lead screw (252) to rotate synchronously through the second bevel gear (254), the lead screw (252) drives the slider (255) to move radially away from the center of the pot, and the slider (255) drives the magnetic block (24) to move synchronously; S4. Reciprocating cycle heating: When the rotating ring (22) rotates to the maximum deflection angle, it returns counterclockwise. During the return process, the lead screw (252) rotates in the opposite direction, and the slider (255) drives the magnetic block (24) to move radially closer to the center of the pot until it returns to the initial position. Repeat steps S3-S4 to make the magnetic block (24) continue to "reciprocate rotation + radial movement". S5. Stop heating: Once the pan-fried buns are cooked, turn off the heating element and the forward and reverse motors to complete the heating process.

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