Electromagnetic heating device and induction cooker

Abstract

The electromagnetic heating device comprises a lower cover, a wire coil assembly and a fan, an air inlet hole is formed in the position, corresponding to the fan, of the lower cover, and a shielding area is arranged at the position, between the air inlet hole and the wire coil assembly, of the lower cover, so that the projection area of the air inlet coverage area of the air inlet hole in the vertical direction is smaller than the projection area of the coverage area of the fan. The shielding area is arranged between the air inlet hole and the wire coil assembly, the shielding area enables the air inlet coverage area of the air inlet hole below the fan to be smaller than the coverage area of the fan, the distance between the air inlet coverage area and a hot air area below the wire coil assembly is further increased, and the situation that hot air flows to the air inlet coverage area is reduced; therefore, the temperature rise of the airflow at the air inlet hole or the hot air sucked into the air inlet hole is reduced, the problem that the temperature rise of the airflow sucked into the fan is increased or the hot air below the fan is directly sucked into the device due to the influence of the hot air below the wire coil assembly is solved, and the heat dissipation effect in an existing electromagnetic heating device is improved.

Description

Technical Field

[0001] This application relates to the technical field of electromagnetic heating, and more particularly, to an electromagnetic heating device and an induction cooker. Background Art

[0002] The heating principle of an electromagnetic heating device is the electromagnetic induction phenomenon. An alternating current generates an alternating magnetic field with a continuously changing direction in a coil. Eddy currents will appear at the bottom of the pot body in the alternating magnetic field, and the Joule heat effect of the eddy currents causes the bottom of the pot body to heat up, thus achieving heating. Therefore, during the operation of the electromagnetic heating device, the heat in the device accumulates quickly. Relying on the fan to suck air from the outside to dissipate heat in the device, since the heat generated by the coil assembly heats the air below it, the temperature of the air flow sucked into the device by the fan becomes higher or directly sucks in too much hot air below the coil assembly, resulting in poor heat dissipation effect in the device. It is urgent to improve the problem that the temperature of the air flow sucked by the fan becomes higher or the hot air below it is sucked into the device. Utility Model Content

[0003] The purpose of this application is to provide an electromagnetic heating device and an induction cooker to improve the problem that the temperature of the air flow sucked by the fan becomes higher or the hot air below it is sucked into the device.

[0004] The embodiments of this application are implemented as follows:

[0005] The present utility model provides an electromagnetic heating device, including a lower cover, a coil assembly, and a fan. An air inlet hole is provided on the lower cover corresponding to the fan, and a shielding area is provided between the air inlet hole and the coil assembly on the lower cover, so that the projected area of the air inlet coverage area of the air inlet hole in the vertical direction is smaller than the projected area of the coverage area of the fan.

[0006] In a preferred embodiment, a first rib is convexly provided on the lower surface of the lower cover between the air inlet hole and the corresponding position of the coil assembly on the lower surface of the lower cover. In the vertical direction, the height position where the air inlet hole is located is higher than the bottom surface height position of the first rib.

[0007] In a preferred embodiment, in the vertical direction, the projection of the first rib and the projection of the coverage area of the fan partially overlap. The part of the coverage area on the side close to the coil assembly at the overlapping part is the overlapping area, and the shielding area includes the partial overlapping area.

[0008] In a preferred embodiment, the shape of the first rib is arc-shaped or strip-shaped.

[0009] In a preferred embodiment, in the first direction, the length of the first rib is greater than the length of the air inlet hole.

[0010] In a preferred embodiment, a shielding area is further provided on the lower cover, so that the projected area of the air inlet coverage area of the air inlet hole in the vertical direction is smaller than the projected area of the coverage area of the fan.

[0011] In a preferred embodiment, a shielding portion is further provided on the lower cover, the shielding portion shields a part of the air inlet holes, and the shielding area includes the shielding area of the shielding portion.

[0012] In a preferred embodiment, a second rib portion is convexly provided on the upper surface of the lower cover between the fan and the wire coil assembly.

[0013] In a preferred embodiment, the thickness of the first rib portion is greater than or equal to 2 mm.

[0014] In a preferred embodiment, the lower surface of the lower cover is quadrilateral or rounded quadrilateral, at least four support pads are further provided on the lower surface of the lower cover, at least one support pad is provided at each corner of the lower surface, and the thickness of the first rib portion is less than or equal to the thickness of the support pad.

[0015] The present utility model further provides an induction cooker, including: an upper cover; a control board; a display board; and,

[0016] The electromagnetic heating device as described above, the upper cover is disposed on the lower cover, and both the control board and the display board are disposed between the upper cover and the lower cover.

[0017] The beneficial effects of the present application compared with the prior art are:

[0018] The present application can improve the problem of the air flow inhaled by the hot air heating fan below the wire coil assembly in the prior art. In the present application, a shielding area is provided between the air inlet hole and the wire coil assembly on the lower cover, and the shielding area makes the air inlet coverage area of the air inlet hole below the fan smaller than the coverage area of the fan, further making the distance between the air inlet coverage area and the hot air area below the wire coil assembly larger, reducing the situation of hot air flowing to the air inlet coverage area, thereby reducing the temperature rise of the air flow at the air inlet hole or reducing the hot air inhaled at the air inlet hole, improving the problem that the temperature rise of the air flow inhaled by the fan becomes higher or the hot air is directly inhaled into the device due to the influence of the hot air below the wire coil assembly, enhancing the heat dissipation effect in the existing electromagnetic heating device, and thus reducing the temperature rise in the electromagnetic heating device. Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 Stereogram (viewing the lower surface) of the electromagnetic heating device according to an embodiment of the present application;

[0021] Figure 2 Cross-sectional view of the induction cooker according to an embodiment of the present application;

[0022] Figure 3 For Figure 2 Local enlarged view of A in

[0023] Figure 4 Exploded stereogram (viewing the upper surface) of the electromagnetic heating device according to an embodiment of the present application;

[0024] Figure 5 Bottom view (viewing the lower surface) of the electromagnetic heating device according to an embodiment of the present application;

[0025] Figure 6 Top view (viewing the upper surface) of the electromagnetic heating device according to an embodiment of the present application;

[0026] Figure 7 Stereogram (viewing the lower surface) of the electromagnetic heating device according to an embodiment of the present application;

[0027] Figure 8 Stereogram (without the upper cover) of the induction cooker according to an embodiment of the present application.

[0028] Reference numerals:

[0029] 1 - lower cover; 101 - air inlet hole; 101a - height position where the air inlet hole is located; 102 - first rib portion; 102a - height position of the bottom surface of the first rib portion; 103 - cross region; 104 - second rib portion; 105 - support pad; 106 - air outlet;

[0030] 2 - coil assembly; 201 - first direction;

[0031] 3 - fan; 301 - projection of the covered area of the fan; 302 - straight line passing through the center of the coil assembly and the center of the fan;

[0032] 4 - control board;

[0033] 5 - display board;

[0034] 6 - upper cover; Detailed implementation manners

[0035] Next, the technical solutions in the embodiments of the present application will be described in conjunction with the accompanying drawings in the embodiments of the present application.

[0036] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present application is not limited by the specific embodiments disclosed below.

[0037] In addition, in the description of the present application, it should be understood that the orientation or positional relationship indicated by terms such as "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application 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 therefore should not be construed as a limitation of the present application.

[0038] In the present application, unless otherwise clearly defined and limited, terms such as "installed", "connected", "connected to", "fixed" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or a communication connection; it may be directly connected, or indirectly connected through an intermediate medium, and may be the communication between two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0039] In the present application, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to terms such as "embodiment", "example", "an embodiment", "example" or "specific example" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. The technical solutions of the present application will be clearly and completely described below with reference to the drawings.

[0040] In the existing electromagnetic heating device, since the coil assembly generates a certain amount of heat during operation, and the heat is transferred to the lower part thereof, the air at the air inlet will be affected by it, resulting in an increase in the temperature of the air flow sucked into the device by the fan or directly sucking too much hot air under the coil assembly, making the heat dissipation effect poor. There is an urgent need for a structure to improve the heat dissipation effect to solve this problem.

[0041] It can be understood that the following descriptions involving orientation descriptions such as the upper surface and the lower surface are all determined based on the state when the device is placed or used normally.

[0042] Please refer to Figure 1 、 Figure 5 and Figure 6 , the electromagnetic heating device includes a lower cover 1, a coil assembly 2 and a fan 3. An air inlet hole 101 is formed in the lower cover 1 corresponding to the fan 3. It should be noted that in the present utility model, the hole formed in the position of the lower cover 1 corresponding to the fan 3 is defined as the air inlet hole 101, but it does not limit the electromagnetic heating device to form holes for air inlet or air outlet at other positions outside the air inlet hole 101. A shielding area is provided between the air inlet hole 101 and the coil assembly 2 on the lower cover 1, so that the projected area of the air inlet coverage area of the air inlet hole 101 in the vertical direction is smaller than the projected area of the coverage area of the fan 3. Through the setting of the shielding area, the air inlet coverage area of the air inlet hole below the fan 3 is smaller than the coverage area of the fan 3, further increasing the distance between the air inlet coverage area and the hot air area below the coil assembly 2, reducing the flow of hot air to the air inlet coverage area, thereby reducing the temperature rise of the air flow at the air inlet hole 101 or reducing the hot air inhaled at the air inlet hole 101. Therefore, the electromagnetic heating device of the present utility model improves the problem in the prior art that the temperature rise of the air flow inhaled by the fan 3 becomes high or hot air is directly inhaled into the device due to the influence of the hot air below the coil assembly 2, improves the heat dissipation effect inside the existing electromagnetic heating device, and thus reduces the temperature rise inside the electromagnetic heating device. In one embodiment, the shielding area is provided on the air inlet side of the air inlet hole 101, forming a bias pressure on the air inlet side of the fan 3, improving the air inlet speed of the fan 3. With the increase of the air inlet speed, the heat dissipation efficiency inside the device can be further improved, so that the heat dissipation effect of the fan 3 on the device is improved. Similarly, the shielding area can also be provided on the air outlet side of the fan, forming a bias pressure on the air outlet side of the fan 3, enhancing the heat dissipation effect by increasing the air outlet speed. Preferably, the shielding area can be provided on both the air inlet side and the air outlet side of the fan 3 simultaneously, forming a "nozzle" structure to increase the speed of the incoming air flow, further improving the heat dissipation efficiency of the fan 3, thereby realizing an electromagnetic heating device that improves the air pressure at the air inlet hole.

[0043] Refer to Figures 1 to 3 , a first rib portion 102 protrudes between the air inlet hole 101 and the corresponding position of the coil assembly 2 on the lower surface of the lower cover 1 on the lower surface of the lower cover 1. In the vertical direction, the height position 101a of the air inlet hole 101 is higher than the bottom surface height position 102a of the first rib portion 102. By arranging the first rib portion 102 between the air inlet hole 101 and the coil assembly 2 and making the air inlet hole 101 higher than the bottom surface of the first rib portion 102, it plays a blocking role, reducing to a certain extent the hot air below the coil assembly 2 from being inhaled into the device, and can also reduce the heat transferred from the hot air to the air inlet of the air inlet hole 101, thereby reducing the intake air heat of the fan 3 into the device, improving the heat dissipation effect of the fan 3 on the device, and thus realizing an electromagnetic heating device that can reduce the intake air heat.

[0044] Refer to Figure 5 , in the vertical direction, the projection of the first rib portion 102 and the projection 301 of the covering area of the fan have an intersection. The part of the covering area close to the wire reel assembly 2 at the intersection is the intersection area 103, and the shielding area includes the intersection area 103. Since the intersection area 103 occupies a part of the corresponding position below the fan 3, a part of the air inlet covering area of the air inlet hole 101 is occupied, so that the projected area of the air inlet covering area of the air inlet hole 101 in the vertical direction is smaller than the projected area of the covering area of the fan 3. This not only increases the distance between the air inlet covering area and the hot air area below the wire reel assembly, reducing the situation of hot air flowing towards the air inlet covering area, but also realizes an electromagnetic heating device for increasing the air pressure of the air inlet hole by reducing the air inlet covering area of the air inlet hole 101. In another embodiment, the lower cover 1 is further provided with a shielding portion that shields a part of the air inlet holes 101. The shielding area includes the shielding area of the shielding portion. Specifically, the shielding surface of the shielding portion is located below the air inlet holes 101, that is, the shielding surface is the effective shielding part of the air inlet holes 101. Through the shielding of the shielding portion, the projected area of the air inlet covering area of the air inlet holes 101 in the vertical direction is smaller than the projected area of the covering area of the fan 3. For the specific setting of the shielding portion, it can be connected to or integrally formed with the first rib portion 102, and the shielding surface extends from the shielding portion to below the air inlet holes 101. It can also extend from other places on the lower cover to shield the air inlet holes 101, or directly cancel part of the air inlet holes 101. The setting structure of the shielding portion is simple, and those skilled in the art can implement the setting of the shielding portion after reading this paragraph, so it is not limited and elaborated here.

[0045] Refer to Figure 5, the shape of the first rib portion 102 is arc-shaped. The first rib portion 102 can be set as a complete circle. In this case, the blocking effect on hot air is better. Further, the complete-circle first rib portion 102 is concentric with the wire coil assembly 2, which is easy to position the first rib portion 102 or the wire coil assembly 2, and the blocking coverage range of hot air is more accurate. When the first rib portion 102 is a convex rib with an arc shape, the diameter of the first rib portion 102 is larger than the outer diameter of the wire coil assembly 2. Preferably, the diameter of the first rib portion 102 is 30 mm - 60 mm larger than the outer diameter of the wire coil assembly 2, and preferably 50 mm. At this time, the blocking coverage range of the hot air below the wire coil assembly 2 is more complete, which can prevent the general blocking effect caused by the setting position of the first rib portion 102 being too close to the wire coil assembly 2. Preferably, the first rib portion 102 is set to be able to support the lower cover 1 on the placement plane. When the first rib portion 102 fits on the placement plane, the hot air below the wire coil assembly 2 is restricted within the first rib portion 102, which blocks the hot air from heating the air flow at the air inlet hole 101 or being sucked into the device by the fan 3 to a greater extent, further improving the heat dissipation effect and reducing the temperature rise inside the electromagnetic heating device. Such a setting can also cancel other structures for supporting the lower cover 1 on the placement plane. The function of the first rib portion 102 is increased, making the structure of the lower cover 1 simpler and easier to manufacture.

[0046] In another embodiment, refer to Figure 7 , the shape of the first rib portion 102 is set as a long strip. Preferably, the long-strip first rib portion 102 is tangent to the air inlet hole 101. The long-strip first rib portion 102 is easier to manufacture, reducing the manufacturing cost of the solution provided by this application. It should be noted that regardless of the setting of the first rib portion 102, there can be a part of the solid structure below the fan 3 to occupy part of the position below the fan 3, so that the projected area of the air inlet coverage area of the air inlet hole 101 in the vertical direction is smaller than the projected area of the coverage area of the fan 3.

[0047] Of course, the first rib portion 102 can also be other regular or irregular shapes, as long as it can meet the requirement of being located between the air inlet hole 101 and the wire coil assembly 2 and blocking the hot air below the wire coil assembly 2, and no limitation is made here.

[0048] Refer to Figure 5, the first direction 201 is the direction perpendicular to the straight line 302 passing through the centers of the coil assembly and the fan in the horizontal direction. In the first direction 201, the length L2 of the first rib portion 102 is greater than the length L1 of the air inlet hole 101. Since the length L2 of the first rib portion is greater in the first direction 201, the flow between the hot air from below the coil assembly 2 and the air inlet hole 101 can be blocked to a greater extent. Therefore, the effect of preventing the influence of hot air is better, and the heat dissipation effect of the fan 3 on the inside of the electromagnetic heating device is further improved.

[0049] See Figure 4 , a second rib portion 104 protrudes from the upper surface of the lower cover 1 between the fan 3 and the coil assembly 2. It should be noted that the upper surface of the lower cover 1 is only the other side relative to the lower surface, and is not limited to the surface where the highest position of the lower cover 1 is located. The upper surface of the lower cover 1 has a space for accommodating components such as the coil assembly 2 and the fan 3. The second rib portion 104 can reduce the heat transfer of the airflow just entering through the air inlet hole 101 below the coil assembly 2 inside the device, so that the entering airflow can enter other areas of the device at a lower temperature, improving the heat dissipation effect of the fan 3. At the same time, the second rib portion 104 can play a role in flow around, blocking part of the air outlet end of the fan 3, and further increasing the flow velocity of the airflow leaving the fan 3. In one embodiment, refer to Figure 5 In the vertical direction, the projection of the first rib portion 102 and the projection of the second rib portion 104 intersect. In another embodiment, refer to Figure 7 , in the vertical direction, the projection of the first rib portion 102 and the projection of the second rib portion 104 are tangent. The second rib portion 104 is arranged corresponding to the fan 3. In one embodiment, the second rib portion 104 coincides or substantially coincides with the outer contour of the fan 3. Therefore, the projection of the second rib portion 104 in the vertical direction coincides or substantially coincides with the projection 301 of the coverage area of the fan. The second rib portion 104 is mainly located on the side close to the coil assembly 2. The first rib portion 102 and the second rib portion 104 are integrally formed or separately connected to the lower cover 1. Since the first rib portion 102 and the second rib portion 104 are relatively close in the horizontal direction, although the first rib portion 102 and the second rib portion 104 are located on opposite sides of the lower cover 1 respectively, the corresponding position can be found on the opposite side according to the flow marks or installation marks. Therefore, the second rib portion 104 can be positioned by means of the first rib portion 102, thereby positioning the installation of the fan 3, making the installation of the fan 3 not easy to make mistakes. The correct installation of the fan 3 can further ensure its working efficiency and its heat dissipation effect on the device. Due to the guarantee of the heat dissipation effect, the aging loss of the lower cover 1 is slowed down, and the service life of the electromagnetic heating device is extended. Similarly, the first rib portion 102 can also be positioned by means of the second rib portion 104, thereby ensuring the blocking effect of the first rib portion 102.

[0050] See Figure 4, in a preferred embodiment, the shape of the second rib portion 104 is arc-shaped. The arc-shaped second rib portion 104 can be attached to the fan 3 to play a better blocking role. The setting of the second rib portion 104 forms a bias on the air outlet side of the fan 3, so that the air outlet speed of the fan 3 when sucking air from the outside and blowing it into the device interior becomes larger, further improving the heat dissipation efficiency. Of course, the second rib portion 104 can also be other regular or irregular shapes, which are not limited here.

[0051] The first rib portion 102 and the second rib portion 104 can also strengthen the overall structural strength of the lower cover 1. It reduces the usage loss of the lower cover 1 and prolongs the service life of the electromagnetic heating device.

[0052] In a preferred embodiment, the thickness of the first rib portion 102 is greater than or equal to 2 mm, ensuring that the first rib portion 102 can block the hot air below the line coil assembly 2 to a certain extent, and further ensuring the reduction of the incoming air heat introduced by the fan 3 of the electromagnetic heating device.

[0053] Participate Figure 5 , the lower surface of the lower cover 1 is quadrilateral or rounded quadrilateral. When the first rib portion 102 is a circular convex rib, the first rib portion 102 is tangent to three of the sides of the lower surface of the lower cover 1, making the first rib portion 102 more beautiful in shape and also being able to block the hot air below the line coil assembly 2 to a greater extent. A plurality of air outlets 106 for air outlet are provided on the side surface of the lower cover 1. At least four support pads 105 are further provided on the lower surface of the lower cover 1, and at least one support pad 105 is provided at each corner of the lower surface. The support pads 105 are used to support the lower cover 1 on the placement plane. The thickness of the first rib portion 102 is less than or equal to the thickness of the support pads 105. It can be understood that in the vertical direction, the bottom surface of the first rib portion 102 is higher than or flush with the bottom surface of the support pads 105. When the bottom surface of the first rib portion 102 is flush with the bottom surface of the support pads 105, the first rib portion 102 and the support pads 105 jointly support the lower cover 1, making the electromagnetic heating device more stable and not easy to shake when placed on the placement plane, ensuring the safety during the use of the electromagnetic heating device and improving the user experience. And when the bottom surface of the first rib portion 102 is flush with the bottom surface of the support pads 105, the heating of the air at the air inlet hole 101 by the hot air below the line coil assembly 2 and the suction of the hot air into the electromagnetic heating device by the fan 3 can be reduced to a greater extent. When the shape of the first rib portion 102 is a closed figure, in the placed state of the electromagnetic heating device, the space inside the first rib portion 102 is close to an airtight space, and the ability to isolate hot air is further improved.

[0054] This application also provides an induction cooker, see Figure 2 、 Figure 6 and Figure 8, including an upper cover 6, a control board 4, a display board 5 and the electromagnetic heating device as described above. The upper cover 6 is disposed on the lower cover 1, and both the control board 4 and the display board 5 are disposed between the upper cover and the lower cover 1. Preferably, the upper cover 6 is a microcrystalline panel or other panel structure capable of withstanding high temperatures.

[0055] What is not described in this application can be realized by adopting or referring to the prior art.

[0056] Each embodiment in this specification is described in a progressive manner. For the same or similar parts among the embodiments, reference can be made to each other, and the key point of each embodiment is to illustrate the differences from other embodiments.

[0057] The above are only the preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An electromagnetic heating device, comprising a lower cover, a coil assembly and a fan, wherein an air inlet hole is formed in the lower cover corresponding to the fan, and the features are that, The lower cover is provided with a shielding area between the air inlet hole and the coil assembly, so that the projected area of the air inlet coverage area of the air inlet hole in the vertical direction is smaller than the projected area of the coverage area of the fan.

2. The electromagnetic heating device according to claim 1, characterized in that A first rib is convexly provided on the lower surface of the lower cover between the corresponding positions of the air inlet hole and the coil assembly on the lower surface of the lower cover. In the vertical direction, the height position where the air inlet hole is located is higher than the height position of the bottom surface of the first rib.

3. The electromagnetic heating device according to claim 2, wherein In the vertical direction, the projection of the first rib intersects with the projection of the coverage area of the fan. The part of the coverage area on the side close to the coil assembly at the intersection is the intersection area, and the shielding area includes the intersection area.

4. The electromagnetic heating device according to claim 2, characterized in that, The shape of the first rib is arc-shaped or strip-shaped.

5. The electromagnetic heating device according to claim 2, characterized in that, In a first direction, the length of the first rib is greater than the length of the air inlet hole.

6. The electromagnetic heating device according to claim 1, characterized in that The lower cover is further provided with a shielding part, the shielding part shields part of the air inlet hole, and the shielding area includes the shielding area of the shielding part.

7. The electromagnetic heating device according to claim 1, wherein A second rib is convexly provided on the upper surface of the lower cover between the fan and the coil assembly.

8. The electromagnetic heating device according to claim 2, wherein The thickness of the first rib is greater than or equal to 2 mm.

9. The electromagnetic heating device according to claim 2, characterized in that The lower surface of the lower cover is quadrilateral or rounded quadrilateral. The lower surface of the lower cover is further provided with at least four support pads. Each corner of the lower surface is provided with at least one support pad, and the thickness of the first rib is less than or equal to the thickness of the support pad.

10. An induction cooker, characterized in that, Comprising: An upper cover; A control board; A display board; And, An electromagnetic heating device according to any one of claims 1 to 9, wherein the upper cover is disposed on the lower cover, and both the control board and the display board are disposed between the upper cover and the lower cover.

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