Electromagnetic heating device
By designing the structure of an airflow channel with the cooling fan on the coil bracket of the electromagnetic heating device, the difficulty of heat dissipation caused by the coil winding is solved, and a more efficient heat dissipation and heating effect is achieved, and the stability of the device is improved.
Patent Information
- Application Number
- CN202421752314.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-23
- Publication Date
- 2025-06-03
- Estimated Expiration
- 2034-07-23
AI Technical Summary
In the existing electromagnetic heating devices, the coil is too tightly wrapped, which leads to difficulty in dissipating heat, which easily leads to excessive temperature of the electromagnetic coil disk, affecting the stability and service life of the device.
An electromagnetic heating device is designed, and a number of winding grooves are provided on the coil bracket. The edge to the center of the coil bracket includes a first winding area, a second winding area and a third winding area in turn. The number of layers of the coil in the second winding area is greater than the first winding area and the third winding area, and a vacant area is formed at least on the upper side of the first winding area. The vacant area is connected with the airflow channel formed by the heat dissipation fan, reducing the density of the coil and improving the heat dissipation effect.
By reducing the density of the coil and improving the airflow channel efficiency of the heat dissipation fan, the heating speed of the electromagnetic coil disk is effectively reduced, damage caused by excessive temperature is avoided, and the stability and heating efficiency of the electromagnetic heating device are improved.
Smart Images
Figure CN222940928U_ABST
Abstract
Description
Technical Field
[0001] The utility model discloses an electromagnetic heating device, belonging to the technical field of electromagnetic heating devices. Background Art
[0002] With the development and popularization of the small household appliance industry, electromagnetic heating devices are deeply loved by consumers because of their advantages such as easy to carry and fast heating. The existing electromagnetic heating device includes a base and a panel assembly. An electromagnetic coil disk, a main control board and a fan are arranged in the base. After the electromagnetic coil disk is electrified, heat is generated, and then a heating area is formed on the panel assembly to realize the heating of cookware. The main control board controls the operation of the electromagnetic coil disk to achieve different cooking effects. The fan can play a role in dissipating heat from the main control board, slowing down the heating rate of the main control board, and preventing the main control board from operating at a high temperature for a long time.
[0003] In the winding structure of the existing electromagnetic coil disk, most of them adopt the winding method of two or more layers of coils for winding. However, in order to meet the performance requirements of different user groups for electromagnetic heating devices, it is necessary to develop electromagnetic heating devices with different performances. When designing a high-power and thin-structured electromagnetic heating device, when the number of winding layers of the coil in the same winding slot exceeds two layers, the requirement of a thin and light structure cannot be met. When the winding slots in the electromagnetic coil disk all adopt the full-coverage winding method of upper and lower layers, the coils will be too dense. When the electromagnetic heating device is working, the electromagnetic coil disk will continuously heat up due to the inability to dissipate heat in time, so that the temperature of the electromagnetic coil disk is too high and the electromagnetic heating device is damaged. Summary of the Utility Model
[0004] The purpose of the utility model is to solve the problem that the winding of the coils in the existing electromagnetic coil disk is too tight, resulting in difficult heat dissipation of the electromagnetic coil disk. Therefore, an electromagnetic heating device is provided, which can effectively improve the heat dissipation effect of the electromagnetic coil disk.
[0005] To solve the above technical problems, the utility model adopts the following technical solutions:
[0006] An electromagnetic heating device includes a base, an electromagnetic coil disk and a cooling fan are arranged in the base. The electromagnetic coil disk includes a coil support and a coil. A plurality of winding slots are arranged on the coil support. The edge to the center of the coil support sequentially includes a first winding area, a second winding area and a third winding area. The number of coil layers in the second winding area is greater than that in the first winding area and the third winding area. At least a vacant area is formed above the first winding area. The top surface of the vacant area is not higher than the top surface of the top layer coil in the second winding area. The vacant area is communicated with the air flow channel formed by the cooling fan.
[0007] The beneficial effects of adopting the utility model are:
[0008] In the utility model, the number of layers of coils in the second winding area is greater than the number of layers of coils in the first winding area and the third winding area, and at least a vacant area is formed on the upper side of the first winding area, that is, at least a vacant area is provided on the outer peripheral side of the top layer coil in the second winding area, thereby reducing the density of coils on the outer peripheral side of the top layer coil in the second winding area, avoiding the top layer coil in the second winding area from being affected by other coils and accelerating the heating speed, thereby effectively reducing the heating speed of the top layer coil in the second winding area; in addition, the vacant area is connected to the air flow channel formed by the cooling fan, and when the air flow passes through the vacant area, the vacant area can keep the flow of the air flow smooth and reduce the obstruction encountered during the flow of the air flow, so that the air flow can maintain a faster flow rate as much as possible through the top layer coil in the second winding area, so that the air flow can It can take away more heat, which helps to improve the heat dissipation effect of the airflow on the top layer of coils in the second winding area, thereby reducing the overall heating rate of the electromagnetic coil disk, and can effectively prevent the electromagnetic coil disk from affecting the internal structure of the electromagnetic heating device due to excessive temperature, so that the electromagnetic heating device can maintain operational stability; secondly, the second winding area has the largest number of coil layers, so the coils in the second winding area can provide sufficient heat for the cookware, thereby increasing the heating efficiency of the electromagnetic coil disk. At the same time, the second winding area is between the first winding area and the third winding area, so that the heating area formed by the coils in the second winding area is sufficient, and it can also effectively avoid the diameter of the heating area being too large, which causes the cookware and the heating area to be unable to fully contact, further improving the heating efficiency of the electromagnetic heating device.
[0009] Preferably, the number of winding slots in the second winding area is greater than the number of winding slots in the first winding area, and the number of winding slots in the second winding area is greater than the number of winding slots in the third winding area. With the above technical solution, the number of winding slots in the second winding area is the largest, that is, the number of coils that can be wound in the second winding area is the largest, so that the coils in the second winding area can provide more heat, which helps to improve the heating efficiency of the electromagnetic coil disk.
[0010] Preferably, the number of winding grooves in the second winding area is greater than the sum of the number of winding grooves in the first winding area and the third winding area. By adopting the above-mentioned technical solution, the heat provided by the electromagnetic coil disk is mainly concentrated in the second winding area, and increasing the number of winding grooves in the second winding area can increase the diameter of the second winding area, thereby increasing the heating area of the electromagnetic heating device, making the pot heated more evenly, and avoiding the long-term local heating of the pot and affecting the service life of the pot; in addition, increasing the number of winding grooves in the second winding area can also enable the coil in the second winding area to provide sufficient heat, thereby improving the heating efficiency of the electromagnetic coil disk.
[0011] Preferably, the number of winding layers of the coils in the first winding area and the third winding area is one layer, and the number of winding layers of the coils in the second winding area is two layers. By adopting the foregoing technical solution, the thickness of the electromagnetic coil disk can be reduced, so that the overall electromagnetic heating device can be thinner and lighter, which is helpful for the transportation and storage of the electromagnetic heating device. At the same time, the overall aesthetics of the electromagnetic heating device can also be improved, so as to improve the popularity of the electromagnetic heating device.
[0012] Preferably, the vacant area includes a first vacant area and a second vacant area. The first vacant area surrounds the outer peripheral side of the top layer coil in the second winding area, and the second vacant area is annularly distributed on the inner peripheral side of the top layer coil in the second winding area. By adopting the foregoing technical solution, the first vacant area and the second vacant area are respectively located on the outer peripheral side and the inner peripheral side of the top layer coil in the second winding area, so that the space for air circulation outside and inside the top layer coil can be increased, which is helpful for accelerating the heat dissipation, improving the heat dissipation efficiency of the top layer coil, and effectively preventing the internal structure of the electromagnetic heating device from being affected by overheating of the top layer coil.
[0013] Preferably, the coil support further includes a fourth winding area. The third winding area is located between the fourth winding area and the second winding area, and the number of coil layers in the fourth winding area is greater than the number of coil layers in the third winding area. By adopting the foregoing technical solution, the fourth winding area is located at the innermost side of the electromagnetic coil disk, and the diameter of the fourth winding area is the smallest. By increasing the number of coil layers in the fourth winding area, a higher amount of heat can be provided in the middle of the cookware, which can effectively prevent the heat received by the cookware from being concentrated in the heating area formed by the second winding area, making the cookware heated more evenly and preventing the service life of the cookware from being affected by long-term local heating. In addition, by increasing the heat generation amount in the fourth winding area, the heating efficiency of the electromagnetic coil disk can be effectively improved, enhancing the user experience. At the same time, since the diameter of the fourth winding area is the smallest, the fourth winding area has a relatively small impact on the temperature rise speed of the overall electromagnetic coil disk. While the coils in the fourth winding area improve the heating efficiency, they can reduce the impact on the temperature rise speed of the electromagnetic coil disk, which is helpful for improving the thermal utilization rate of the electromagnetic coil disk.
[0014] Preferably, in the radial direction of the coil support, the number of wire grooves in the second winding area is greater than the number of wire grooves in the fourth winding area. By adopting the foregoing technical solution, reducing the number of wire grooves in the fourth winding area can avoid heat concentration in the fourth winding area and also prevent the temperature in the fourth winding area from rising too fast, which may affect the temperature rise speed of the overall electromagnetic coil disk.
[0015] Preferably, the number of winding layers of the coils in the fourth winding area is two layers. By adopting the foregoing technical solution, using two layers of coils can increase the heat generated in the fourth winding area, which is helpful for improving the heating efficiency of the electromagnetic coil disk.
[0016] Preferably, the cooling fan is close to the coil bracket and forms a cooling channel within the coil bracket. The inlet of the cooling channel is located at the lower side of the coil bracket, the outlet of the cooling channel is located at the upper side of the coil bracket, and the vacant area is within the cooling channel. The cooling channel communicates with the air flow channel formed by the cooling fan. With the foregoing technical solution, the air flow formed by the cooling fan can enter the cooling channel, thereby accelerating the air flow rate within the cooling channel. At the same time, since the cooling channel passes through the coil, the heat exchange between the air flow within the cooling channel and the coil can be improved, which is conducive to the heat dissipation of the coil and enhances the heat dissipation efficiency of the coil. Additionally, the vacant area is at the outlet of the cooling channel, providing a larger space at the outlet of the cooling channel, preventing the air flow from being blocked, and thus improving the heat elimination efficiency of the coil.
[0017] Preferably, the top of the top-layer coil in the second winding area protrudes from the winding groove; and / or, there is a gap between the coil and the bottom of the winding groove. With the foregoing technical solution, the top of the top-layer coil in the second winding area is higher than the winding groove, which can increase the contact area between the top-layer coil and the air flow, improve the heat exchange efficiency between the top-layer coil and the air flow, and thus enhance the heat dissipation effect; and / or, the coil does not contact the bottom of the winding groove, which helps the air flow at the bottom of the coil, facilitates heat dissipation, avoids heat concentration between the coil and the bottom of the winding groove, can improve the overall heat dissipation efficiency of the electromagnetic coil disk, and can also prevent the winding groove from being affected in service life due to long-term exposure to high temperatures.
[0018] Other features and advantages of the present utility model will be disclosed in detail in the following specific embodiments and the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] The following further describes the present utility model with reference to the accompanying drawings:
[0020] Figure 1 is an exploded view of an electromagnetic heating device of the present utility model;
[0021] Figure 2 is a top view of an electromagnetic heating device of the present utility model;
[0022] Figure 3 is a cross-sectional view of an electromagnetic heating device of the present utility model;
[0023] Figure 4 is Figure 3 a partial enlarged view of
[0024] Figure 5 is Figure 4 a partial enlarged view of
[0025] Figure 6 is a top view of the electromagnetic coil disk of an electromagnetic heating device of the present utility model.
[0026] Reference numerals: 1, base; 2, panel assembly; 3, electromagnetic coil disc; 31, coil; 311, first coil; 312, second coil; 313, third coil; 314, fourth coil; 32, winding groove; 321, first winding area; 322, second winding area; 323, third winding area; 324, fourth winding area; 33, vacant area; 331, first vacant area; 332, second vacant area; 34, coil bracket; 4, cooling fan; 41, wind shield; 5, main control board. Detailed implementation manners
[0027] The technical solutions of the embodiments of the present utility model will be explained and described below with reference to the drawings of the embodiments of the present utility model. However, the following embodiments are only the preferred embodiments of the present utility model, not all of them. Based on the embodiments in the implementation manners, other embodiments obtained by those skilled in the art without creative efforts all fall within the protection scope of the present utility model.
[0028] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present utility model.
[0029] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality of" means two or more unless otherwise clearly defined.
[0030] In the present utility model, unless otherwise clearly specified and defined, the terms "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.
[0031] Such as Figures 1 to 6As shown, this embodiment shows an electromagnetic heating device, including a base 1 and a panel assembly 2, wherein an electromagnetic coil disk 3, a cooling fan 4 and a main control board 5 are arranged in the base 1, when the electromagnetic heating device is powered on, the electromagnetic coil disk 3 is controlled by the main control board 5 to heat up so as to cook the pot, in addition, the electromagnetic coil disk 3 includes a coil support 34 and a coil 31, a plurality of winding grooves 32 are arranged on the coil support 34, and the edge to the center of the coil support 34 successively includes a first winding area 321, a second winding area 322 and a third winding area 323, the number of layers of the coil 31 in the second winding area 322 is greater than the number of layers of the coil 31 in the first winding area 321 and the third winding area 323, the first winding area 321 and the third winding area 323 form a vacant area 33 on the upper side of the coil 31, the top end surface of the vacant area 33 is not higher than the top end surface of the top layer coil 31 in the second winding area 322, and the vacant area 33 is connected to the air flow channel formed by the cooling fan 4.
[0032] In this embodiment, the number of layers of the coil 31 in the second winding area 322 is greater than the number of layers of the coil 31 in the first winding area 321 and the third winding area 323, and the first winding area 321 and the third winding area 323 form a vacant area 33 on the upper side of the coil 31, that is, both the inner side and the outer peripheral side of the top layer coil 31 in the second winding area 322 have a vacant area 33, thereby reducing the density of the coils 31 around the top layer coil 31 in the second winding area 322, avoiding the top layer coil 31 in the second winding area 322 from being affected by other coils 31 and accelerating the heating speed, thereby effectively reducing the heating speed of the top layer coil 31 in the second winding area 322; in addition, the vacant area 33 is connected to the airflow channel formed by the cooling fan 4, and when the airflow passes through the vacant area 33, the vacant area 33 can keep the airflow flowing smoothly and reduce the obstruction encountered during the airflow flow, so that the airflow can maintain a faster flow rate through the second winding area as much as possible. The top layer coil 31 in 322 is arranged so that the airflow can take away more heat, which helps to improve the heat dissipation effect of the airflow on the top layer coil 31 in the second winding area 322, thereby reducing the overall heating rate of the electromagnetic coil disk 3, and can effectively prevent the electromagnetic coil disk 3 from affecting the internal structure of the electromagnetic heating device due to excessive temperature, so that the electromagnetic heating device can maintain operational stability; secondly, the number of layers of the coil 31 in the second winding area 322 is the largest, so the coil 31 in the second winding area 322 can provide sufficient heat for the cookware, thereby increasing the heating efficiency of the electromagnetic coil disk 3, and at the same time, the second winding area 322 is located between the first winding area 321 and the third winding area 323, so that the heating area formed by the coil 31 in the second winding area 322 is sufficient, and it can also effectively prevent the diameter of the heating area from being too large, resulting in the cookware and the heating area being unable to fully contact, further improving the heating efficiency of the electromagnetic heating device.
[0033] like Figures 3 to 6As shown, in this embodiment, the first winding area 321, the second winding area 322, and the third winding area 323 are all annularly distributed on the coil bracket 34, and the centers of the first winding area 321, the second winding area 322, and the third winding area 323 coincide with the center of the coil bracket 34. The second winding area 322 surrounds the outer peripheral side of the third winding area 323, and the first winding area 321 surrounds the outer peripheral side of the second winding area 322. The coil 31 includes a first coil 311 in the first winding area 321, a second coil 312 in the second winding area 322, and a third coil 313 in the third winding area 323. Among them, the number of winding layers of the first coil 311 in the first winding area 321 is one layer, the number of winding layers of the second coil 312 in the second winding area 322 is two layers, and the number of winding layers of the third coil 313 in the third winding area 323 is one layer. The top layer coil 31 in the second coil 312 is higher than the first coil 311 and the third coil 313. In this embodiment, at most only two layers are wound in the electromagnetic coil disc 3, which can reduce the thickness of the electromagnetic coil disc 3, so that the overall electromagnetic heating device can be thinner and lighter, which is helpful for the transportation and storage of the electromagnetic heating device. At the same time, it can also improve the overall aesthetics of the electromagnetic heating device, so as to improve the popularity of the electromagnetic heating device.
[0034] In addition, since the number of winding layers of the second coil 312 is the largest, the heat generated by the second coil 312 is more, so a heating area with a higher temperature can be formed on the panel assembly 2. The cooking of the cookware is mainly provided with heat by the heating area formed by the second coil 312. The first coil 311 and the third coil 313 respectively provide heat on the outer peripheral side and the inner peripheral side of the second coil 312, playing an auxiliary heating effect, which can improve the heating efficiency. At the same time, it can also make the cookware receive heat more evenly, avoiding heat being concentrated only in the heating area formed by the second coil 312.
[0035] As Figure 5 shown, a first vacant area 331 is formed on the upper side of the first coil 311, and a second vacant area 332 is formed on the upper side of the third coil 313. Both the first vacant area 331 and the second vacant area 332 are not higher than the top end surface of the second coil 312. The first vacant area 331 surrounds the outer peripheral side of the top layer coil 31 in the second coil 312, and the first vacant area 331 is annularly distributed on the inner peripheral side of the top layer coil 31 in the second coil 312. Furthermore, the space for air circulation on the outer side and the inner side of the top layer coil 31 can be increased, which helps to accelerate the heat dissipation, improve the heat dissipation efficiency of the top layer coil 31, and effectively prevent the top layer coil 31 in the second coil 312 from affecting the internal structure of the electromagnetic heating device due to overheating.
[0036] Of course, it can be understood that in other embodiments, the vacant area may also only include the first vacant area provided on the upper side of the first coil.
[0037] As Figures 2 to 5 shown, in this embodiment, a plurality of fixing bars are radially distributed on the coil bracket 34, and a plurality of partitions are provided on the fixing bars at intervals along the length direction of the fixing bars. The winding grooves 32 are formed between two adjacent partitions. The number of winding grooves 32 distributed in the first winding area 321 is less than the number of winding grooves 32 distributed in the second winding area 322, and the number of winding grooves 32 distributed in the third winding area 323 is also less than the number of winding grooves 32 distributed in the second winding area 322. The number of winding grooves 32 in the second winding area 322 is the largest, that is, the most coils 31 can be wound in the second winding area 322, so that the second coil 312 can provide more heat, so that the heat generated by the second coil 312 can meet the cooking requirements, and it also helps to improve the heating efficiency of the electromagnetic coil disc 3.
[0038] Of course, it can be understood that since the winding layer of the second coil 312 in the second winding area 322 is two layers, the heat provided by the electromagnetic coil disc 3 is mainly concentrated in the second winding area 322. When the number of winding grooves 32 in the second winding area 322 is greater than the sum of the number of winding grooves 32 in the first winding area 321 and the third winding area 323, the diameter of the second winding area 322 can be increased, thereby increasing the area of the heating area formed by the second coil 312, making the cookware heat more evenly and avoiding affecting the service life of the cookware due to long-term local heating of the cookware; in addition, increasing the number of winding grooves 32 in the second winding area 322 can also make the coils 31 in the second winding area 322 provide sufficient heat and improve the heating efficiency of the electromagnetic coil disc 3.
[0039] As Figures 3 to 5 shown, in this embodiment, the bottom coils 31 of the first coil 311, the third coil 313 and the second coil 312 are flush, making the winding of the coils 31 neater and tighter, which helps to improve the winding stability of the coils 31 and can reduce the possibility of the coils 31 jumping wires or detaching from the winding grooves 32; in addition, the winding of the coils 31 is kept flat, which can make the gaps between the coils 31 as consistent as possible, helping the air flow between the coils 31 to be smooth, accelerating the heat dissipation of the coils 31, and effectively improving the heat dissipation efficiency of the coils 31.
[0040] In order to avoid heat concentration at the bottom of the winding grooves 32, there is a gap between the coils 31 and the bottom of the winding grooves 32 in this embodiment, thereby avoiding direct contact between the coils 31 and the bottom of the winding grooves 32, keeping the air flow at the bottom of the coils 31 smooth, helping the heat dissipation at the bottom of the coils 31, avoiding heat concentration between the coils 31 and the bottom of the winding grooves 32, improving the overall heat dissipation efficiency of the electromagnetic coil disc 3, and also preventing the winding grooves 32 from being affected in service life due to long-term high temperature.
[0041] In addition, the top of the top layer coil 31 in the second winding area 322 protrudes from the winding groove 32, that is, the top layer coil 31 in the second coil 312 is higher than the top end of the partition plate, so that the top of the top layer coil 31 in the second coil 312 can be in contact with the air flow on the upper side of the coil bracket 34, increasing the contact area between the top layer coil 31 and the air flow, which helps to prevent the partition plate from hindering the direct contact between the air flow and the top layer coil 31, can improve the heat exchange efficiency between the top layer coil 31 and the air flow, and thus improve the heat dissipation effect.
[0042] As Figures 1 to 4 shown, in this embodiment, the cooling fan 4 is close to the outer edge of the coil bracket 34. A wind shield 41 is installed on the top of the cooling fan 4. There is an assembly gap between the coil bracket 34 and the bottom of the base 1. The cooling fan 4 has an air outlet communicating with the assembly gap. The air flow formed by the cooling fan 4 enters the bottom of the coil bracket 34 from the assembly gap and forms a heat dissipation channel inside the coil bracket 34. The inlet of the heat dissipation channel is located on the lower side of the coil bracket 34 and communicates with the assembly gap. The outlet of the heat dissipation channel is located on the upper side of the coil bracket 34. The vacant area 33 is inside the heat dissipation channel. The air flow formed by the cooling fan 4 can enter the heat dissipation channel, which can accelerate the air flow rate in the heat dissipation channel. At the same time, the heat dissipation channel passes through the coil 31, so it can improve the heat exchange between the air flow in the heat dissipation channel and the coil 31, is conducive to the heat dissipation of the coil 31, and improves the heat dissipation efficiency of the coil 31; in addition, the vacant area 33 is at the outlet of the heat dissipation channel, making the outlet of the heat dissipation channel have a larger space, avoiding the hindrance of the air flow, and thus can improve the heat dissipation efficiency of the coil 31; secondly, the wind shield 41 can play a role in gathering and guiding the air flow, preventing the air flow from leaving from the top of the cooling fan 4, making the air flow concentrate on flowing from the side of the cooling fan 4 to the main control board 5 and the electromagnetic coil disc 3, which helps to improve the heat dissipation effect of the cooling fan 4.
[0043] In addition, in this embodiment, the air outlet of the cooling fan 4 connected to the assembly gap is between the two fixing bars, which can avoid the two fixing bars from blocking the air flow, enabling the air flow to flow from the bottom of the coil bracket 34 to the top of the coil bracket 34 along the heat dissipation channel, preventing the fixing bars from hindering the air flow formed by the cooling fan 4, making the air flow in the heat dissipation channel flow more smoothly, and thus improving the heat dissipation effect of the cooling fan 4 on the electromagnetic coil disc 3.
[0044] Of course, it can be understood that in other embodiments, the winding groove 32 can also be annularly arranged on the coil bracket 34. The coil bracket 34 is provided with a plurality of winding grooves 32 with the same center. Through holes are provided in the winding grooves 32 to connect the bottom and the top of the coil bracket 34, thereby forming a heat dissipation channel.
[0045] As Figures 3 to 6As shown in the figure, in this embodiment, the coil bracket 34 further includes a fourth winding area 324 distributed in a ring shape. The third winding area 323 is located between the fourth winding area 324 and the second winding area 322, that is, the third winding area 323 surrounds the outer peripheral side of the fourth winding area 324. The coil 31 includes a fourth coil 314 wound around the fourth winding area 324. The number of winding layers of the fourth coil 314 in the fourth winding area 324 is two layers. The bottom layer coil 31 of the fourth coil 314 is flush with the third coil 313, that is, the second vacant area 332 is located between the top layer coil 31 of the second coil 312 and the top layer coil 31 of the fourth coil 314. The fourth winding area 324 is located at the innermost side of the electromagnetic coil disk 3, and the diameter of the fourth winding area 324 is the smallest. By increasing the number of coil 31 layers in the fourth winding area 324, higher heat can be provided in the middle of the cookware, which can effectively prevent the heat received by the cookware from concentrating in the heating area formed by the second winding area 322, make the cookware heat more evenly, and prevent the service life of the cookware from being affected due to long-term local heating. In addition, by increasing the heat generation of the fourth winding area 324, the heating efficiency of the electromagnetic coil disk 3 can be effectively improved, and the user experience can be improved. At the same time, since the diameter of the fourth winding area 324 is the smallest, the fourth winding area 324 has little impact on the heating rate of the overall electromagnetic coil disk 3. The coil 31 in the fourth winding area 324 can improve the heating efficiency while reducing the impact on the heating rate of the electromagnetic coil disk 3, which helps to improve the thermal utilization rate of the electromagnetic coil disk 3.
[0046] In addition, in order to avoid the over-fast heating rate of the fourth coil 314, in the radial direction of the coil bracket 34 in this embodiment, the number of wire grooves 32 in the fourth winding area 324 is less than the number of wire grooves 32 in the second winding area 322. Reducing the number of wire grooves 32 in the fourth winding area 324 can reduce the diameter of the fourth winding area 324, and can also reduce the number of the fourth coils 314, thereby reducing the heat generated by the fourth coils 314, avoiding heat concentration in the fourth winding area 324, and at the same time, it can also avoid the over-fast temperature rise in the fourth winding area 324 from affecting the heating rate of the overall electromagnetic coil disk 3.
[0047] Of course, it can be understood that in other embodiments, the coil bracket 34 may also only include the first winding area 321, the second winding area 322 and the third winding area 323.
[0048] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes but is not limited to the content described in the drawings and the above specific implementation manner. Any modification that does not deviate from the functional and structural principles of the present invention will be included in the scope of the claims.
Claims
1. An electromagnetic heating device, comprising a base, an electromagnetic coil disk and a cooling fan are arranged in the base, the electromagnetic coil disk comprises a coil support and a coil, the coil support is provided with a plurality of winding grooves, and the edge to the center of the coil support sequentially comprises a first winding area, a second winding area and a third winding area, characterized in that: The number of layers of coils in the second winding area is greater than the number of layers of coils in the first winding area and the third winding area, and a vacant area is formed at least on the upper side of the first winding area. The top surface of the vacant area is not higher than the top surface of the top layer of coils in the second winding area, and the vacant area is connected to the air flow channel formed by the cooling fan.
2. An electromagnetic heating device according to claim 1, characterized in that: The number of winding grooves in the second winding area is greater than the number of winding grooves in the first winding area, and the number of winding grooves in the second winding area is greater than the number of winding grooves in the third winding area.
3. The electromagnetic heating device according to claim 1, characterized in that: The number of winding grooves in the second winding area is greater than the sum of the numbers of winding grooves in the first winding area and the third winding area.
4. The electromagnetic heating device according to claim 1, characterized in that: The number of winding layers of the coil in the first winding area and the third winding area is one layer, and the number of winding layers of the coil in the second winding area is two layers.
5. The electromagnetic heating device according to claim 1, characterized in that: The vacant area includes a first vacant area and a second vacant area. The first vacant area surrounds the outer circumference of the top coil in the second winding area, and the second vacant area is distributed in an annular shape on the inner circumference of the top coil in the second winding area.
6. The electromagnetic heating device according to claim 1, characterized in that: The coil support further includes a fourth winding area, the third winding area is between the fourth winding area and the second winding area, and the number of layers of the coil in the fourth winding area is greater than the number of layers of the coil in the third winding area.
7. An electromagnetic heating device according to claim 6, characterized in that: In the radial direction of the coil support, the number of winding grooves in the second winding area is greater than the number of winding grooves in the fourth winding area.
8. The electromagnetic heating device according to claim 6, characterized in that: The number of winding layers of the coil in the fourth winding area is two.
9. The electromagnetic heating device according to claim 1, characterized in that: The heat dissipation fan is close to the coil bracket and forms a heat dissipation channel in the coil bracket, the inlet of the heat dissipation channel is located at the lower side of the coil bracket, the outlet of the heat dissipation channel is located at the upper side of the coil bracket, the vacant area is in the heat dissipation channel, and the heat dissipation channel is connected to the airflow channel formed by the heat dissipation fan.
10. The electromagnetic heating device according to claim 1, characterized in that: The top of the top layer coil in the second winding area protrudes from the winding groove; and / or there is a gap between the coil and the bottom of the winding groove.