Electric microwave

Abstract

One embodiment of the electric range may include a plurality of ferrite modules positioned on the upper part of the upper supporter, below the coil substrate, and at positions corresponding to each of the plurality of coil substrates. The ferrite module may include a ferrite core with a plurality of pieces spaced apart from each other, and a core fixing portion that is coupled to the upper supporter and formed by insert injection molding with the ferrite core, and which fixes the ferrite core. The shape of the core fixing portion may be freely formed by insert injection molding.

Description

[Technical Field]

[0001] The present invention relates to an electric range, and more particularly, to an induction heating type electric range. [Background Art]

[0002] The content described herein merely provides background information related to the present invention, and does not constitute prior art.

[0003] Various types of cooking appliances are used to heat food in households and restaurants. The aforementioned cooking appliances include gas ranges using gas and electric ranges using electricity.

[0004] Electric ranges are broadly classified into a resistance heating type and an induction heating type.

[0005] The electric resistance method is a method in which a current is applied to a metal resistance wire or a non-metallic heating element such as silicon carbide to generate heat, and the generated heat is radiated or conducted to heat an object to be heated (for example, a cooking container such as a pot or a frying pan).

[0006] The induction heating method is a method in which high-frequency power is applied to a coil to generate a magnetic field around the coil, and an eddy current generated by the generated magnetic field is used to heat an object to be heated made of a metal component.

[0007] Considering the basic heating principle of the induction heating method, when a current is applied to a working coil, heat is generated while the object to be heated is induction-heated, and the object to be heated is heated by the generated heat.

[0008] In a conventional electric range, the area of the coil to which power is applied is formed to be large. Further, an object to be heated is heated only when placed at a position overlapping these large-area coils.

[0009] Therefore, since the coils in an electric range occupy a large area, the top of the electric range is equipped with heating elements corresponding to a small number of large-area coils.

[0010] Because the heating elements are large and few in number, the cover plate of an electric range, which has a limited surface area, is equipped with only a few heating elements. Also, because the heating elements have a large surface area, even if an electric range is equipped with multiple heating elements, a large area is occupied by unheated areas between the heating elements.

[0011] This structure results in a limited space for the object being heated in the electric range, and because the entire large heating area is used even when heating small objects, power consumption may increase. This can be inconvenient for the user.

[0012] To compensate for these shortcomings, coils with a small, plate-like structure can be placed in the electric range. By placing many small coils in the electric range, the space between coils is reduced, and only the coil on which the object to be heated is placed operates, thereby improving the space efficiency of the electric range and reducing power consumption. [Overview of the project] [Problems that the invention aims to solve]

[0013] The object of the present invention is to provide an electric range that includes a ferrite module having a structure that allows it to be stably attached to an upper supporter.

[0014] Furthermore, an object of the present invention is to provide an electric range that includes a ferrite module having a structure that is manufactured by an insert injection molding method and has improved productivity.

[0015] Furthermore, an object of the present invention is to provide an electric range equipped with a ferrite module that includes ferrite cores of various shapes and core fixing parts.

[0016] The objectives of the present invention are not limited to those mentioned above. Other objectives and advantages of the present invention not mentioned can be understood from the following description and more clearly from the embodiments of the present invention. Furthermore, it is readily apparent that the objectives and advantages of the present invention can be achieved by the means and combinations thereof described in the claims. [Means for solving the problem]

[0017] One embodiment of an electric range may include a plurality of ferrite modules positioned on top of an upper supporter, below a coil substrate, and in positions corresponding to each of a plurality of coil substrates. A ferrite module may include (compose; construct; set up; enclose; include; contain; have; possess) a ferrite core in which a plurality of pieces are spaced apart from each other, and a core fixing portion bonded to the upper supporter and formed by insert injection with the ferrite core, for fixing the ferrite core.

[0018] The shape of the core fixing portion may be freely formed by insert injection molding.

[0019] The ferrite core may be formed in any of the following forms: a first type in which a portion of the upper surface is covered by a core fixing portion; a second type in which a fixing groove is formed for fixing to the core fixing portion; or a third type in which at least one is formed at the corner and includes an inclined portion for fixing to the core fixing portion.

[0020] In the case of the first or second type, the ferrite core may include a plurality of first ferrites positioned at each corner of a core fixing portion having a rectangular shape, and a plurality of second ferrites, at least one of which is positioned between the plurality of first ferrites.

[0021] The second ferrite may be positioned such that a portion of it is in contact with the first ferrites between a plurality of first ferrites, and the other portion is positioned such that it is separated from the first ferrites between a plurality of first ferrites.

[0022] At a position where the first ferrite and the second ferrite are arranged so as to be spaced apart from each other, a plurality of second ferrites may be arranged, and the plurality of second ferrites may be arranged spaced apart from each other.

[0023] The first ferrite may be formed in a square shape, the second ferrite may be formed in a rectangular shape, and the length of the long side of the second ferrite may be formed to correspond to the length of one side of the first ferrite.

[0024] In the case of the first type, the core fixing portion may include a bottom plate, a bent portion bent at an end of the bottom plate, and an extending portion bent and extended from the bent portion and covering a part of upper surfaces of the first ferrite and the second ferrite.

[0025] In the case of the second type, the core fixing portion may include a bottom plate, a bent portion bent at an end of the bottom plate, and a fixing protrusion bent and extended from the bent portion and coupled to the fixing groove.

[0026] The fixing protrusion includes a first sub-protrusion arranged at a position coupled to the first ferrite and a second sub-protrusion arranged at a position coupled to the second ferrite, and a width of the first sub-protrusion may be formed larger than a width of the second sub-protrusion.

[0027] In the case of the third type, a plurality of ferrite cores may be provided, and the plurality of ferrite cores may be radially arranged spaced apart from each other with reference to a center of the core fixing portion.

[0028] The ferrite core may be formed in a quadrangular shape, and one pair of inclined surfaces may be respectively provided at corners at positions corresponding to a diagonal direction of the ferrite core.

[0029] Through insert injection molding, the specific shape of the core fixing portion that supports and fixes the ferrite core can be formed in various ways.

[0030] The ferrite module may be provided in various structures of type 1, type 2, and type 3. Each type may have its own characteristics in addition to structural differences. [Effects of the Invention]

[0031] In the electric range according to the present invention, the ferrite module is manufactured by insert injection molding, and the ferrite core and the core fixing part made of plastic material can be joined together. Because the shape of the core fixing part can be freely formed by insert injection molding, even if the ferrite pieces constituting the ferrite core are arranged in various shapes, the core fixing part can be easily manufactured in a shape that corresponds to the fixing hole of the upper supporter.

[0032] Therefore, since the ferrite pieces are manufactured to have various shapes and the core fixing portion is manufactured to correspond to the fixing groove, the ferrite module may be stably bonded and attached to the upper support.

[0033] Furthermore, in the electric range according to the present invention, a ferrite core can be formed by arranging multiple ferrites having the same or different shapes, insert-injecting them with a core fixing portion to form a ferrite module. The specific shape of the core fixing portion that supports and fixes the ferrite core by insert injection can vary, and these various core fixing portion structures can be easily formed.

[0034] Therefore, by combining ferrites of various sizes and shapes, it is possible to easily manufacture a shape that corresponds to the anchoring groove of the upper support, thus potentially improving the productivity of ferrite modules.

[0035] Furthermore, in the electric range according to the present invention, the ferrite module may be provided in various structures of type 1, type 2, and type 3. Each type may have its own characteristics in addition to structural differences. Therefore, by considering the characteristics of each electric range and selecting and designing a suitable type of ferrite module, manufacturers can easily manufacture ferrite modules, improve magnetic field generation efficiency, and reduce manufacturing costs.

[0036] The effects described above, as well as the specific effects of the present invention, will be explained and described below in relation to the embodiments for carrying out the invention. [Brief explanation of the drawing]

[0037] [Figure 1] This is a perspective view showing an electric range according to one embodiment. [Figure 2] This is a front view showing an electric range according to one embodiment. [Figure 3a] This is an exploded perspective view showing an electric range according to one embodiment. [Figure 3b] This is an exploded perspective view showing an electric range according to another embodiment. [Figure 4a] This is a plan view with the cover plate omitted, as shown in Figure 1. [Figure 4b] This figure shows a coil substrate according to one embodiment. [Figure 5] This is a cross-sectional view oriented in the direction of 5-5 in Figure 4. [Figure 6] This is a bottom view showing an electric range according to one embodiment. [Figure 7] This figure 6 is a diagram with the case omitted. [Figure 8a] This is a perspective view showing the upper support according to one embodiment. [Figure 8b] This is a perspective view showing the upper support according to another embodiment. [Figure 9] This is a plan view showing an upper support according to one embodiment. [Figure 10] This is a cross-sectional view of Figure 9, oriented in the 10-10 direction. [Figure 11] This is a cross-sectional view oriented in the direction of 11-11 in Figure 9. [Figure 12] This is an exploded perspective view showing the upper supporter and ferrite module. [Figure 13] This is a plan view showing the ferrite module attached to the upper supporter. [Figure 14] Figure 13 is a plan view showing the state in which the coil substrate is connected. [Figure 15] This is a bottom view of the upper supporter. [Figure 16] Figure 15 shows the state in which the indicator board is connected. [Figure 17] Figure 16 shows the state in which various parts are assembled. [Figure 18] This is an exploded view of the upper supporter and ferrite module according to one embodiment. [Figure 19] This is an exploded view of a ferrite module according to one embodiment. [Figure 20] This is a perspective view of a ferrite module according to another embodiment. [Figure 21] This is a plan view of Figure 20. [Figure 22] This is a side view of Figure 21. [Figure 23] This is a cross-sectional view oriented in the 23-23 direction in Figure 21. [Figure 24] This is a perspective view showing a ferrite core according to one embodiment. [Figure 25] This is a perspective view of a ferrite module according to another embodiment. [Figure 26] This is a plan view of Figure 25. [Figure 27] This is a side view of Figure 25. [Figure 28] This is a cross-sectional view oriented in the 28-28 direction in Figure 26. [Figure 29] This is a perspective view of a ferrite core according to another embodiment. [Figure 30] This is a plan view of Figure 29. [Figure 31]This is a perspective view of a ferrite module according to another embodiment. [Figure 32] This is a plan view of Figure 31. [Figure 33] Figure 29 is a perspective view of the ferrite module shown, viewed from bottom to top. [Figure 34] Figure 29 shows an exploded view of the upper supporter and the ferrite module. [Figure 35] This is a diagram showing a cross-section of a part of an electric range. [Modes for carrying out the invention]

[0038] The aforementioned objectives, features, and advantages will be described in detail below with reference to the attached drawings, so that a person with ordinary skill in the art to which the present invention pertains can easily implement the technical concept of the present invention. In describing the present invention, if a specific description of known technology according to the present invention is deemed to obscure the gist of the present invention, the detailed description will be omitted. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. The same reference numerals in the drawings are used to indicate the same or similar components.

[0039] Although terms such as "first," "second," etc., are used to describe various components, these components are not limited by these terms. These terms are simply used to distinguish one component from another, and unless otherwise specified, the first component may also be the second component.

[0040] Throughout the specification, unless otherwise stated, each component may be singular or plural.

[0041] The aforementioned objectives, features, and advantages will be described in detail below with reference to the attached drawings, so that a person with ordinary skill in the art to which the present invention pertains can easily implement the technical concept of the present invention. In describing the present invention, if a specific description of known technology according to the present invention is deemed to obscure the gist of the present invention, the detailed description will be omitted. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. The same reference numerals in the drawings are used to indicate the same or similar components.

[0042] Although terms such as "first," "second," etc., are used to describe various components, these components are not limited by these terms. These terms are simply used to distinguish one component from another, and unless otherwise specified, the first component may also be the second component.

[0043] Throughout the specification, unless otherwise stated, each component may be singular or plural.

[0044] In this specification, singular expressions include plural expressions unless the context clearly indicates otherwise. Terms such as “composed of” or “including” in this application should not be interpreted as necessarily including all of the multiple components or stages described in the specification, but rather as meaning that some of the components or stages may not be included, or that further components or stages may be included.

[0045] Throughout the specification, "A and / or B" means A, B, or A and B unless otherwise specified, and "C to D" means C or greater and D or less unless otherwise specified.

[0046] Throughout this specification, “up,” “down,” or “up and down direction” means the direction above, below, or up and down of the electric range in the manner in which the electric range is installed for everyday use. “Both sides” or “side direction” means a direction perpendicular to the up and down direction. Both sides or side direction may include “left and right direction” and “front and back direction,” and the left and right direction and the front and back direction are perpendicular to each other.

[0047] Figure 1 is a perspective view showing an electric range according to one embodiment. Figure 2 is a front view showing an electric range according to one embodiment. Figure 3a is an exploded perspective view showing an electric range according to one embodiment.

[0048] The electric range according to the embodiment can heat the object to be heated using an induction heating method. In this case, the object to be heated may be, for example, tableware containing a metal material such as stainless steel or iron.

[0049] The induction heating method involves applying high-frequency power to a working coil 140a to generate a magnetic field around the working coil 140a, and then using the eddy currents generated by this magnetic field to heat an object made of metal components.

[0050] In other words, when the working coil 140a and the ferrite material are arranged adjacent to each other, and high-frequency power is applied to the working coil 140a, the working coil 140a and the ferrite can generate a magnetic field through electromagnetic interaction.

[0051] In this way, a magnetic field is generated around the working coil 140a, and when the object to be heated is placed within the region of the generated magnetic field, eddy currents are induced in the object to be heated by the magnetic field, and Joule heat is generated by the eddy currents, thereby heating the object to be heated. When the object to be heated, such as tableware, is heated, the food placed on it can be heated and cooked.

[0052] An electric range in one embodiment may include a case 110, a cover plate 120, an upper supporter 130, a coil substrate 140, and a ferrite module 150.

[0053] The case 110 can serve to protect the components that make up the electric range. For example, the case 110 may be made of aluminum, but is not limited to this. On the other hand, the case 110 may be insulated to prevent heat generated by the coil substrate 140 from being released to the outside.

[0054] The case 110 may house components that make up the electric range, and although the top is open, these open areas can be closed by the cover plate 120. The case 110 as a whole may be made into a box shape by processing a plate-like material.

[0055] The case 110 may include a bottom plate 111 and side walls 112. The bottom plate 111 can form the bottom surface of the case 110. The bottom plate 111 can support the internal components of the electric range.

[0056] The side wall 112 can be bent from the base plate 111 to form a space for housing components. The side wall 112 can be bent upward at the edge of the base plate 111 to form the side of the electric range.

[0057] Side walls 112 may be placed on each side of the roughly rectangular base plate 111. The side walls 112 can reinforce the overall rigidity of the case 110. In other words, the side walls 112, which are formed to bend away from the base plate 111, can prevent the plate-shaped base plate 111 from bending or breaking due to the weight of the internal components or external forces.

[0058] Furthermore, a cover plate 120 can be attached to the upper part of the side wall 112. In this way, the case 110 and the cover plate 120 are attached, the inside of the case 110 is closed, and a space may be provided inside the case 110 for arranging various components.

[0059] The cover plate 120 is coupled to the upper end of the case 110, and the object to be heated may be placed on its upper surface. The cover plate 120 can close the open top of the case 110 and protect the components housed in the case 110.

[0060] The object to be heated is placed on the upper surface of the cover plate 120, and the magnetic field generated by the coil substrate and ferrite module 150 can pass through the cover plate 120 and reach the object to be heated. The cover plate 120 may be made of a material including, for example, ceramic, but is not limited to this.

[0061] The cover plate 120 may be made of, for example, glass material and be made transparent or translucent so that light irradiated from the indicator substrate 250 can pass through it.

[0062] The electric range may be equipped with an input interface 160 to receive input from the user. The input interface 160 is installed so as to superimpose on a specific area of ​​the cover plate 120 and can display a specific image.

[0063] For example, the input interface 160 may be flattened and embedded in the cover plate 120, or installed so as to be in contact with the lower surface of the cover plate 120.

[0064] The input interface 160 may receive touch input from the user, and the electric range may be driven based on the received touch input.

[0065] For example, the input interface 160 is a module for the user to input desired heating intensity, heating time, etc., and may be embodied in physical buttons, a touch panel, or the like.

[0066] For example, the input interface 160 may be a TFT LCD (Thin Film Transistor Liquid Crystal Display), but is not limited to this.

[0067] The cover plate 120 may be provided with a cover frame 121 for connecting the upper supporter 130 to the cover plate 120. The cover plate 120 may be formed to protrude downward from the cover plate 120 at a position adjacent to the edge of the cover plate 120 and corresponding to the side plate 136 of the upper supporter 130.

[0068] When the cover plate 120 is coupled to the upper supporter 130, the cover frame 121 may be positioned to surround the side plate 136 of the upper supporter 130 externally. Holes may be formed in the cover frame 121, and protrusions may be formed on the upper supporter 130 at positions corresponding to these holes.

[0069] Therefore, at a position where the cover frame 121 and the side plate 136 of the upper supporter 130 overlap each other laterally, the projection of the upper supporter 130 is inserted into the hole in the cover frame 121, and the cover plate 120 and the upper supporter 130 can be joined together.

[0070] The upper supporter 130 may be located below the cover plate 120 and housed in the case 110. The upper supporter 130 is housed inside the case 110, where various components used for the operation of the electric range may be connected.

[0071] The coil substrate 140 and ferrite module 150 that form the magnetic field may be located on top of the upper supporter 130. In addition, various circuit boards used to operate the electric range and a cooling device for cooling these circuit boards may be located below the upper supporter 130.

[0072] Thus, the upper supporter 130 may have a complex shape because many parts are arranged therein. Therefore, the upper supporter 130 may be easily manufactured into a complex shape by, for example, injection molding a plastic material. The specific structure of the upper supporter 130 will be described in detail below.

[0073] The coil substrate 140 is provided in multiple units positioned on top of the upper supporter 130 and spaced apart from each other in the lateral direction, and a working coil 140a may be printed on it.

[0074] Conventional working coils 140a are manufactured by winding the coil in a spiral. In the case of these working coils 140a, the overall size of the working coil 140a can be large due to the winding of the coil. A large working coil 140a reduces the spatial efficiency of the heating area of ​​the electric range and increases power consumption.

[0075] In this embodiment, a coil substrate 140 on which a working coil 140a is printed can be used. The working coil 140a on the coil substrate 140 may be provided not by being wound, but by being printed on the coil substrate 140.

[0076] When printing the working coil 140a, it is possible to print the working coil 140a densely over a small area, and to print the working coil 140a in a way that they are spaced apart from each other in the vertical direction of the substrate, forming a multilayer structure.

[0077] As a result, when the working coil 140a is printed onto the coil substrate 140, the area of ​​the coil substrate 140 can be reduced compared to the method in which the working coil 140a is wound, and the length of the working coil 140a can be sufficiently extended. This makes it possible to manufacture a coil substrate 140 equipped with a working coil 140a with a small area.

[0078] Furthermore, since the coil substrate 140 has the form of a thin film, the coil substrate 140 on which the working coil 140a is provided may have a much slimmer form compared to the method in which the working coil 140a is wound.

[0079] Therefore, in this embodiment, by using a coil substrate 140 on which the working coil 140a is printed, the volume occupied by the working coil 140a can be reduced, and the total length of the working coil 140a can be sufficiently extended. This makes it possible to manufacture the entire electric range in a slim design.

[0080] As shown in Figure 3a, compared to the method in which the working coil 140a is wound, this embodiment allows a very large number of small-area coil substrates 140 to be placed on the electric range. As a result, a large number of working coils 140a may be densely arranged on the top of the electric range.

[0081] The coil substrates 140 may be arranged without gaps between adjacent coil substrates 140, compared to the method in which the working coil 140a is wound. With such a structure, a large number of coil substrates 140 may be densely arranged without gaps in the electric range.

[0082] Therefore, since the empty space without the working coil 140a can be minimized in the area where the coil substrate 140 is located, multiple objects to be heated can be heated simultaneously, and the space efficiency of the electric range can be improved.

[0083] Furthermore, since the working coil 140a is printed on the coil substrate 140, it is not necessarily required to arrange the working coil 140a in a circular pattern. For example, the working coil 140a may have a roughly rectangular shape and be printed in a spiral pattern to correspond to the rectangular shape of the coil substrate 140.

[0084] Due to the aforementioned structure, the working coil 140a may have a very long overall length when assembled. Furthermore, the working coils 140a are densely arranged on the coil substrate 140, and each working coil 140a is isolated from the others and can operate independently.

[0085] As a result, only the working coil 140a located in the area at least partially overlapping with the object to be heated operates to form a magnetic field, while the other working coils 140a do not need to operate. With this structure, the user can freely place the object to be heated anywhere on the cover plate 120.

[0086] This provides convenience to the user, and since the working coil 140a that is not superimposed on the heated object does not operate, power consumption can be significantly reduced.

[0087] The ferrite module 150 may be provided in multiple units, positioned on top of the upper supporter 130, below the coil substrate 140, and in positions corresponding to each of the multiple working coils 140a.

[0088] Since a working coil 140a is printed on the coil substrate 140, when high-frequency power is applied to the working coil 140a, a magnetic field is formed around the ferrite module 150 and the coil substrate 140, and this formed magnetic field can create eddy currents in the object to be heated.

[0089] The ferrite modules 150 may be arranged on the underside of the coil substrate 140 in a number corresponding to the positions of the working coils 140a. In another embodiment, multiple working coils 140a may be arranged on a single ferrite module 150. In this case, the multiple working coils 140a may all be arranged so as to overlap vertically on the same ferrite module 150.

[0090] In the embodiment, the ferrite module 150 may be provided in a rectangular shape overall.

[0091] The ferrite module 150 may be formed by insert injection molding of ferrite material and plastic material. In this case, the ferrite material in one ferrite module 150 may be arranged as multiple pieces spaced apart from each other. The ferrite module 150 will be described in detail below.

[0092] Various circuit boards containing various control elements and electrical circuits may be provided in the electric range for its operation. These boards may be provided as a main board 170, an EMI (Electro Magnetic Interference) filter 190, an SMPS (Switched Mode Power Supply) board 180, an inverter board 210, a resonant board 220, and an indicator board 250.

[0093] The main board 170 may be equipped with a control unit for controlling the electric range. The main board 170 may be powered by an external power supply and may be equipped to communicate with external devices by wire or wireless connection.

[0094] The EMI filter 190 can suppress electromagnetic interference generated by electricity. The EMI filter 190 may be supplied with AC power from an external power source. Furthermore, the EMI filter 190 can reduce the noise (i.e., EMI (Electro Magnetic Interference)) of the supplied AC power and provide the noise-reduced AC power as an SMPS substrate 180.

[0095] The SMPS board 180 can supply power to the electric range. The SMPS board 180 may be supplied with AC power with reduced noise from the EMI filter 190. The SMPS board 180 can also rectify the supplied AC power into DC power and supply the rectified DC power to the inverter board 210.

[0096] The inverter board 210 can apply a resonant current to the working coil 140a. The inverter board 210 may include an inverter section that applies a resonant current to the working coil 140a by switching operation. Multiple inverter sections may be provided, and the switching operation of the inverter sections may be controlled by a control section provided on the main board 170.

[0097] Here, the inverter unit receives DC power from the SMPS board 180 and performs switching operations based on the provided DC power, thereby applying a resonant current to the working coil 140a.

[0098] The inverter section may include two switching elements, which may be alternately turned on and turned off by switching signals provided by the control unit. The switching operation of these two switching elements generates a high-frequency alternating current (i.e., a resonant current), which may be applied to the working coil 140a.

[0099] An inverter board 210 according to one embodiment can be equipped with a resonant capacitor, as shown in Figures 3a and 7. That is, the inverter board 210 shown in Figure 3a is a configuration in which the inverter section and the resonant capacitor are integrated.

[0100] In other embodiments, the inverter board 210, as shown in Figure 17, may include only the inverter section without a resonant capacitor. In such cases, a separate resonant board 220 equipped with a resonant capacitor may be provided in the electric range.

[0101] The resonant substrate 220 and the resonant capacitor will be explained first. The resonant capacitor is electrically connected to the inverter section, and when a resonant current is applied to the working coil 140a by the switching operation of the inverter section, resonance begins.

[0102] Furthermore, when the resonant capacitor resonates, the current flowing through the working coil 140a connected to the resonant capacitor increases. In other words, through this process, eddy currents can be induced in the heated object placed above the working coil 140a connected to the resonant capacitor.

[0103] Multiple resonant capacitors may be provided. In the case of an integrated type in which the inverter section and resonant capacitors are all provided on the inverter board 210, the resonant capacitors may be arranged on the inverter board 210 at a distance from the inverter section.

[0104] Of course, if the inverter board 210 and the resonant board 220 are separated from each other and exist separately, the resonant capacitor may be provided on the resonant board 220.

[0105] The indicator board 250 may be equipped with a light source. The light source may be provided, for example, in the form of multiple LEDs arranged in a row.

[0106] The indicator board 250 lights up when the electric range is operating, informing the user whether or not the heating element is working. The indicator board 250 can also change the lighting patterns and colors of multiple LEDs to inform the user of the electric range's operating status.

[0107] Figure 3b is an exploded perspective view showing an electric range according to another embodiment. The electric range may include a lower supporter 260 positioned above the bottom plate 111 of the case 110. The lower supporter 260 is positioned below the upper supporter 130, is housed in the case 110, and is positioned below a substrate that connects to the lower surface of the upper supporter 130, and can support the upper supporter 130.

[0108] The lower supporter 260 is formed in a plate shape, and holes may be formed in the parts corresponding to the inlet hole 1112 and the outlet hole 1113, respectively, so that air can flow through the inlet hole 1112 and the outlet hole 1113 formed in the bottom plate 111, which will be described later.

[0109] Multiple circuit boards, a blower fan 230, a heat sink 240, a ferrite module 150, and a coil circuit board 140 are arranged on the upper supporter 130, and the upper supporter 130 can support the load of these components. Because multiple components are connected to the upper supporter, the load of these components may cause the upper supporter 130 to deform and sag.

[0110] Therefore, the lower supporter 260 is positioned below the upper supporter 130 to support the upper supporter 130, to which numerous components are joined, thereby preventing the upper supporter 130 from sagging.

[0111] When the microwave oven is assembled, the lower supporter 260 may be positioned vertically separated from the upper supporter 130, at a distance sufficient to support the relatively large components provided on the various circuit boards, the larger-than-average-volume blower fan 230, and the heat sink 240.

[0112] The upper surface of the lower supporter 260 may have projections protruding upward to support the upper supporter 130 or a component that connects to the lower surface of the upper supporter 130. On the other hand, the upper surface of the bottom plate 111 of the case 110 may have projections protruding upward to support the lower supporter 260.

[0113] Various circuit boards may be placed on the upper side of the lower supporter 260. Therefore, it is necessary to electrically insulate the circuit boards that can come into contact with the lower supporter 260 from the bottom plate 111 of the case 110, which is made of a material such as aluminum, in order to prevent leakage current and short circuits.

[0114] Therefore, the lower supporter 260 is formed of an electrically insulating material and is positioned between the bottom plate 111 of the case 110 and the substrate to electrically insulate the substrate from the bottom plate 111. The lower supporter 260 may be formed of, for example, mica material, which is an electrically insulating material.

[0115] The electric range may include an insulating material 270 and a mica sheet 280. The insulating material 270 is placed between the upper supporter 130 and the cover plate 120 to suppress heat transfer from the heated object to the upper supporter 130.

[0116] The heat generated when the object to be heated is heated may pass through the cover plate 120 and be transferred to the upper supporter 130 located inside the electric range and the various components connected to it.

[0117] These heat transfers can heat the inside of the electric range, and in particular, if the heat is transferred to various circuit boards, it can adversely affect the operation of the electric range. Therefore, by placing an insulating material 270 between the cover plate 120 and the upper supporter 130, heat transfer from the heated object to the inside of the electric range can be suppressed, preventing the internal components from overheating and improving the operating performance of the electric range.

[0118] The insulation material 270 may, for example, be made relatively thin, or it may be formed from a carbon material with good insulation performance, but it is not limited to these.

[0119] The insulation material 270 is formed in a plate shape and is provided in multiple pieces to cover the coil substrate 140. The insulation material 270 as a whole may be separated from each other in the lateral direction of the electric range and formed integrally in the vertical direction. That is, the longitudinal direction of one insulation material 270 may be arranged parallel to the vertical direction of the electric range.

[0120] The mica sheet 280 is positioned between the upper supporter 130 and the cover plate 120, and may be positioned at least one location above or below the insulation material 270.

[0121] In the embodiment shown in Figure 3b, the mica sheet 280 is positioned both above and below the insulation material 270. In another embodiment, the mica sheet 280 may be positioned only above or below the insulation material 270.

[0122] The mica sheets 280 may be provided in a shape corresponding to the insulation material 270. Therefore, the mica sheets 280 as a whole may be separated from each other in the lateral direction of the electric range and formed integrally in the vertical direction. That is, the longitudinal direction of one insulation material 270 may be arranged parallel to the vertical direction of the electric range.

[0123] The mica sheet 280 is made of mica material and, together with the heat insulating material 270, can suppress heat transfer from the heated object to the upper supporter 130 inside the electric range. In addition, the mica sheet 280 is positioned in contact with the heat insulating material 270, which can suppress damage to the heat insulating material 270 due to impact.

[0124] In particular, the carbon fiber insulation material 270 is susceptible to impact and easily damaged, so the mica sheet 280 can support the insulation material 270, suppress damage to the insulation material 270, and increase the durability of the insulation material 270.

[0125] On the other hand, the insulation material 270 and mica sheet 280 are formed to be shorter in the area where the input interface 160 is located, so as not to obstruct the input interface 160, thus avoiding the input interface 160. Unless otherwise mentioned, the embodiment shown in Figure 3b will be described below.

[0126] Figure 4a is a plan view of Figure 1 with the cover plate 120 omitted. Figure 4b shows a coil substrate 140 according to one embodiment. Figure 5 is a cross-sectional view of Figure 4a facing the 5-5 direction. Figure 6 is a bottom view of an electric range according to one embodiment.

[0127] Various circuit boards may be fitted with elements that generate heat when the electric range is in operation.

[0128] For example, the switching elements responsible for on / off control in electric ranges generate a lot of heat. Therefore, these elements require forced cooling to prevent the electric range from shutting down or malfunctioning due to overheating.

[0129] Therefore, the electric range may include a blower fan 230 and a heat sink 240. The blower fan 230 and the heat sink 240 can serve to cool the heated circuit boards and other components.

[0130] The blower fan 230 may be coupled to the lower surface of the upper supporter 130 and positioned at a distance from the circuit board. The blower fan 230 may be configured to expel air toward the heat sink 240. The blower fan 230 may be electrically connected to the main circuit board 170 and its operation may be controlled by a control unit provided on the main circuit board 170.

[0131] The heatsink 240 may be positioned below the upper supporter 130, with its longitudinal direction parallel to the air exhaust direction of the blower fan 230. The heatsink 240 can be coupled to the underside of the inverter board 210.

[0132] In this embodiment, the inverter boards 210 are provided in pairs, spaced apart from each other, so the heat sinks 240 may be provided in pairs, coupled to each inverter board 210. Corresponding to the pair of heat sinks 240, the blower fans 230 may be provided in pairs, each positioned to correspond to the pair of heat sinks 240.

[0133] The heat sink 240 may have multiple cooling fins, and an air passage may be formed inside through which air passes in a direction parallel to its longitudinal direction. Therefore, the air discharged from the outlet of the blower fan 230 cools the heat sink 240 as it passes through the outer surface and the internal air passage, thereby effectively cooling the inverter board 210.

[0134] The heat sink 240 can be coupled to the inverter board 210 to increase the heat dissipation area of ​​the inverter board 210, allowing the inverter board 210 to be effectively cooled by the air flowed by the blower fan 230.

[0135] Since the inverter board 210 is equipped with an inverter section, which is a switching element, the inverter section consumes a large amount of power and may be heated to a higher temperature than other elements. Therefore, the heat sink 240 can be coupled to the inverter board 210 to effectively cool the inverter section.

[0136] On the other hand, since the air flowing through the blower fan 230 flows across the entire underside of the lower supporter 260, the inverter board 210 as well as other boards are cooled by the forced-flowing air, and the inside of the electric range may be cooled as a whole.

[0137] As shown in Figure 6, the bottom plate 111 of the case 110 may include an inlet 1112 and an outlet 1113. The inlet 1112 is formed in a position corresponding to the blower fan 230, allowing air to flow in from the outside.

[0138] The exhaust holes 1113 are formed at a position corresponding to the air exhaust portion of the heat sink 240, and air may be discharged from them. The exhaust holes 1113 may be formed at a position adjacent to the outlet of the air passage formed in the heat sink 240. Since the heat sink 240 and the blower fan 230 are each formed in pairs, the inlet holes 1112 and the exhaust holes 1113 may also be formed in pairs accordingly.

[0139] The working coils 140a may be formed in multiple layers on the coil substrate 140. For example, a sensing coil for sensing the object to be heated may be printed on the top of the coil substrate 140, and multiple working coils 140a may be arranged below it, each forming a layer.

[0140] Figure 4b shows a cross-sectional view of the coil substrate 140, specifically the area where the working coil 140a is located below the sensing coil.

[0141] In Figure 4b, the working coil 140a has an overall rectangular shape and is formed in a spiral manner. This structure provides a shape corresponding to the rectangular anchoring groove 131 and the ferrite module 150, and the working coil 140a can be densely printed, potentially increasing the total length of the working coil 140a.

[0142] However, in other embodiments, the outer shape of the working coil 140a may be formed as a polygon, a circle, or an ellipse.

[0143] As mentioned above, the single working coil 140a shown in Figure 4b may be arranged in multiples on the coil substrate 140, each separated from the others in the vertical direction, forming layers. However, for the sake of clarity, in the following, working coils 140a that are superimposed in the vertical direction and form multiple layers can be referred to as a single identical working coil 140a.

[0144] As shown in Figure 4b, a single coil substrate 140 may have multiple working coils 140a arranged laterally on the coil substrate 140.

[0145] Figure 4b shows, for example, a single coil substrate 140 with two working coils 140a printed horizontally and four working coils 140a printed vertically. However, the size of the coil substrate 140 and the number of working coils 140a printed on a single coil substrate 140 may be changed, taking into consideration the overall shape or size of the electric range and the ease of assembly or disassembly.

[0146] On the other hand, in one coil substrate 140, through holes 1419 may be formed between adjacent working coils 140a. The first piece 1321 of the upper supporter 130 may be fitted into these through holes 1419. By fitting the first piece 1321 into the through holes 1419, the coil substrate 140 may be placed in the designed position. The through holes 1419 may have shapes corresponding to the first piece 1321 and the slit 1323 of the upper supporter 130.

[0147] Furthermore, with this structure, the slit 1323 formed in the first piece 1321 is not blocked by the coil substrate 140, and the light irradiated from the indicator substrate 250 can pass through the slit 1323 hole in the upper support 130 and through the cover plate 120.

[0148] One working coil 140a may be positioned in a location corresponding to one ferrite module 150 and superimposed on each other in the vertical direction. That is, one working coil 140a may be positioned to correspond to one ferrite module 150.

[0149] In this case, a coil boundary portion 1412 may be provided between adjacent working coils 140a. The coil boundary portion 1412 is positioned so that its longitudinal direction intersects with the longitudinal direction of the through hole 1419, and of course, the through hole 1419 is not formed in the coil boundary portion 1412.

[0150] The lower surface of the coil substrate 140 is supported by a second piece 1322, in which case the coil boundary portion 1412 may be positioned in a location corresponding to the second piece 1322 of the boundary rib 132.

[0151] The direction of airflow in Figure 5 is indicated by the arrows. When the blower fan 230 is operating, air can flow into the interior of the electric range from the outside through the inlet hole 1112. Some of the incoming air passes through the outer surface of the heat sink 240 and the air channels formed inside the heat sink 240, while the other incoming air can diffuse as a whole into the interior of the electric range case 110.

[0152] The air forced to flow inside the case 110 may be discharged to the outside through the exhaust hole 1113. In particular, the inverter board 210 to which the heat sink 240 is coupled may be well cooled by the forced flow of air. Therefore, the inverter section, which is a switching element heated to a high temperature, may be effectively cooled by the heat sink 240 and air.

[0153] In this embodiment, the blower fan 230 is coupled to the lower surface of the upper supporter 130, the heat sink 240 is coupled to the inverter board 210, and the inverter board 210 is coupled to the lower surface of the upper supporter 130. In short, since both the blower fan 230 and the heat sink 240, which are cooling devices, are coupled to the upper supporter 130, the case 110 does not need to be provided with a separate structure for coupling the blower fan 230 and the heat sink 240.

[0154] Therefore, the support structure of the electric range can be simplified overall, simplifying the structure of the electric range and reducing manufacturing costs.

[0155] Furthermore, since the case 110 does not have structures that come into contact with the blower fan 230 and the heat sink 240, the assembly and disassembly of the case 110 becomes easier, which may make maintenance work on the electric range easier.

[0156] Figure 7 is a diagram in which case 110 in Figure 6 is omitted. Figure 8a is a perspective view showing the upper supporter 130 according to one embodiment. Figure 8b is a perspective view showing the upper supporter 140 according to one embodiment.

[0157] Figure 9 is a plan view showing an upper supporter 130 according to one embodiment. Figure 10 is a cross-sectional view oriented in the direction of 10-10 in Figure 9. Figure 11 is a cross-sectional view oriented in the direction of 11-11 in Figure 9.

[0158] The upper supporter 130 may be formed in a plate shape overall, and may be provided with a structure in which a plurality of anchoring grooves 131 are formed in a convex shape on the bottom.

[0159] For example, the upper supporter 130 may be manufactured as a single unit by injection molding. In another embodiment, the upper supporter 130 may consist of multiple separate parts, and each piece of the multiple upper supporters 130 may be assembled and mounted inside the electric range.

[0160] The upper supporter 130 may include a flat plate 135 positioned parallel to the lateral direction of the electric range, and a side plate 136 that is bent downward at the edge of the flat plate 135. A ferrite module 150 and a coil substrate 140 are arranged on the flat plate 135, and the side plate 136 can support the flat plate 135 at its edge.

[0161] The flat plate 135 of the upper supporter 130 may have ventilation holes that penetrate the upper supporter 130 in areas other than the fixing groove 131 where the ferrite module 150 and coil substrate 140 are fixed. These ventilation holes may be formed, for example, at the edge of the flat plate, or at the point where the first piece 1321 and the second piece 1322 of the boundary rib 132 intersect.

[0162] A portion of the air forced to flow below the upper supporter 130 by the blower fan 230 passes through the ventilation holes and flows above the upper supporter 130, thereby effectively cooling the ferrite module 150 and coil substrate 140 located above the upper supporter 130 and suppressing their overheating.

[0163] The upper supporter 130 may include a fixing groove 131 and boundary ribs 132.

[0164] The anchoring groove 131 is formed by recessing the flat plate 135 and is arranged to align with each other in the lateral and vertical directions of the upper supporter 130. Multiple anchoring grooves may be provided so that each of the multiple ferrite modules 150 can be anchored. The anchoring groove 131 is formed in a substantially rectangular shape, so that the rectangular coil substrate 140 and ferrite modules 150 can be fitted into the anchoring groove 131.

[0165] On the other hand, in another embodiment, the anchoring grooves 131 are arranged in a zigzag pattern in a plan view on the upper supporter 130 and do not necessarily have to be aligned in the horizontal and vertical directions. For example, if the shape of the coil substrate 140 is hexagonal, the multiple anchoring grooves 131 may be arranged in a honeycomb zigzag pattern.

[0166] The boundary ribs 132 form the boundaries of multiple anchoring grooves 131 and are provided so as to protrude from the upper surface of the upper supporter 130, and there may be multiple boundary ribs.

[0167] The boundary rib 132 may include a first piece 1321 and a second piece 1322. The first piece 1321 may be positioned with its longitudinal direction lateral. The second piece 1322 may be positioned with its longitudinal direction intersecting the longitudinal direction of the first piece 1321.

[0168] Referring to Figure 4a, the first piece 1321 may be positioned with its longitudinal direction in the vertical direction, and the second piece 1322 may be positioned with its longitudinal direction in the horizontal direction. Since the first piece 1321 and the second piece 1322 are positioned with their longitudinal directions intersecting each other, the upper surface of the upper supporter 130 may be formed in a grid pattern as a whole.

[0169] A slit 1323 may be formed in the first piece 1321. The slit 1323 may be formed to penetrate the upper supporter 130 and may be formed in the shape of an elongated hole. An indicator substrate 250 may be placed at a position in the upper supporter 130 corresponding to the position where the slit 1323 is formed.

[0170] Therefore, since the longitudinal direction of the first piece 1321 and the slit 1323 is parallel to the longitudinal direction of the upper supporter 130, the indicator board 250 may also have its longitudinal direction parallel to the longitudinal direction of the upper supporter 130.

[0171] The light source on the indicator board 250 emits light upwards, and the emitted light passes through the slit 1323 and through the glass cover plate 120, allowing the user to see the emitted light.

[0172] The slit 1323 and the indicator substrate 250 are positioned such that their longitudinal directions are parallel to the vertical direction of the upper supporter 130 and are spaced apart from each other, so that the user can see the illuminated light as a whole, which is elongated in the longitudinal direction and spaced apart from each other in the lateral direction.

[0173] The first piece 1321 may be relatively tall, while the second piece 1322 may be shorter than the first piece 1321. The first piece 1321 has a slit 1323 formed in it, and since the light passing through the slit 1323 needs to be clearly visible to the user without diffusion, the first piece 1321 can be formed relatively tall so that the light does not diffuse until it passes over the top surface of the cover plate 120.

[0174] Since the insulation material 270 and mica sheet 280, which are positioned above the first piece 1321, are separated from each other in the slit 1323, the insulation material 270 and mica sheet 280 do not obstruct the slit 1323, and therefore light passing through the slit 1323 can immediately reach the cover plate 120.

[0175] The second piece 1322 is formed relatively low, and insulation material 270 and mica sheet 280 may be placed on the upper side of the second piece 1322. The insulation material 270 or mica sheet 280 may be positioned with its longitudinal direction parallel to the longitudinal direction of the upper supporter 130.

[0176] Therefore, the insulation material 270 and the mica sheet 280 may be arranged integrally in the longitudinal direction of the upper supporter 130 and separated from each other in the lateral direction. The insulation material 270 and the mica sheet 280 may be separated from each other with the first piece 1321 as the boundary.

[0177] In other words, the multiple insulation materials 270 and mica sheets 280 may be separated from each other by the first piece 1321 and positioned above the second piece 1322. Thus, the second piece 1322 can be formed relatively low to create a space in which the insulation materials 270, mica sheets 280, and the coil boundary portion 1412 of the coil substrate 140 are arranged.

[0178] On the other hand, in another embodiment, as shown in Figure 8b, the boundary rib 132 may be formed solely from the second piece 1322 in both the transverse and longitudinal directions. However, even in this case, a slit 1323 may be formed in the second piece 1322 at the position corresponding to the indicator substrate 250.

[0179] The ferrite module 150 may include a ferrite core 151 and a core fixing portion 152. The ferrite core 151 can form a magnetic field. When high-frequency power is applied to the working coil 140a printed on the coil substrate 140, a magnetic field is formed around the ferrite core 151, and this formed magnetic field can create eddy currents in the heated object.

[0180] The core fixing portion 152 is to which the ferrite core 151 is attached, and the ferrite core 151 can be fixed to the fixing groove 131. The core fixing portion 152 is coupled to the upper supporter 130 and is formed by insert injection molding with the ferrite core 151, and can fix the ferrite core 151.

[0181] The core fixing portion 152 forms the outer shape of the ferrite module 150 and may be formed in a rectangular shape overall. On the other hand, the ferrite core 151 is formed of multiple pieces and can be bonded to the core fixing portion 152 by insert injection. As a result, the ferrite module 150 may have a rectangular shape overall.

[0182] Figure 12 is an exploded perspective view showing the upper supporter 130 and the ferrite module 150. Figure 13 is a plan view showing the ferrite module 150 coupled to the upper supporter 130. Figure 14 is a plan view showing the coil substrate 140 coupled to the configuration shown in Figure 13.

[0183] As shown in Figures 12 to 14, the ferrite module 150 can first be attached to the fixing groove 131 formed on the upper part of the upper supporter 130. Next, after the ferrite module 150 is attached, the coil substrate 140 can be attached to the upper supporter 130. The attachment of the coil substrate 140 to the upper supporter 130 can be completed in this order.

[0184] The coil substrate 140 and the ferrite module 150 may be arranged so as to be supported by at least one of the sides or bottom surfaces of the anchoring groove 131 when they are placed in the anchoring groove.

[0185] Each ferrite module 150 may be inserted independently into each anchoring groove 131. Once each ferrite module 150 is inserted into the anchoring groove 131, the sides of the ferrite module 150 may be supported by the sides of the anchoring groove. Additionally, the sides of the ferrite module 150 may be more stably supported by the first piece 1321 and the second piece 1322 of the boundary rib 132.

[0186] When the coil substrate 140 is placed on top of the upper supporter 130, the lower surface of the coil substrate 140 may be supported by the second piece 1322 of the boundary rib 132. At this time, the coil boundary portion 1412 of the coil substrate 140 may be located on the upper surface of the second piece 1322.

[0187] The first piece 1321 of the boundary rib 132 may be fitted into the through hole 1419 of the coil substrate 140. This allows the coil substrate 140 to be positioned in the designed location and supported by the first piece 1321, thereby suppressing lateral movement of the upper supporter 130.

[0188] A substrate coupling portion 141 may be provided to stably attach the coil substrate 140 to the upper supporter 130. The substrate coupling portion 141 is coupled to the coil substrate 140, allowing the coil substrate 140 to be coupled to the upper supporter 130. The substrate coupling portion 141 may be formed integrally with the coil substrate 140, or it may be manufactured separately and coupled to the coil substrate 140.

[0189] The substrate bonding portion 141 may be formed to protrude from the longitudinal end of the coil substrate 140. These protruding substrate bonding portions 141 can be connected to the upper supporter 130 by fastening devices such as screw bolts.

[0190] Connecting pins 1411 may be provided on the edge of the coil substrate 140. When the coil substrate 140 is attached to the upper supporter 130 by the substrate coupling portion 141, the connecting pins 1411 will come into contact with terminals formed on the upper supporter 130, thereby electrically connecting the connecting pins 1411 and the terminals of the upper supporter 130.

[0191] The terminals of the upper supporter 130 may be electrically connected to other electrical components by cables or the like.

[0192] In this embodiment, the ferrite module 150 may be easily and stably attached to the upper supporter 130 by an attachment groove 131 formed on the upper part of the upper supporter 130 and a boundary rib 132 formed surrounding the attachment groove 131.

[0193] Furthermore, since the first piece 1321 is fitted onto the coil substrate 140, the coil substrate 140, once attached to the upper supporter 130, may be placed in the designed position and does not move laterally relative to the upper supporter 130, i.e., in the lateral and vertical directions of the upper supporter 130, thus allowing the coil substrate 140 to be easily assembled onto the upper supporter 130.

[0194] The electric range may include an input interface 160 that is fixed to the top of the upper supporter 130. The input interface 160 can be coupled to the upper supporter 130. For this purpose, the upper supporter 130 may be formed so that its upper surface is recessed downwards and includes an insertion groove 134 into which the input interface 160 is inserted.

[0195] The insertion groove 134 may be provided in a roughly rectangular shape to accommodate the rectangular input interface 160. The insertion groove 134 and the input interface 160 may be positioned in the front center of the electric range to allow the user to easily perform input.

[0196] A hole may be formed at the bottom of the insertion groove 134 to allow cables or the like to pass through for electrical connection between the input interface 160 and other components.

[0197] Figure 15 is a bottom view of the upper supporter 130. Figure 16 shows the state in which the indicator board 250 is attached to the configuration shown in Figure 15. Figure 17 shows the state in which various components are attached to the configuration shown in Figure 16.

[0198] Various substrates can be attached to the lower surface of the upper supporter 130. These substrates may be attached, for example, by fasteners such as screw bolts.

[0199] The main board 170 may be coupled to the lower surface of the upper supporter 130 and may constitute a control unit for controlling the electric range.

[0200] The SMPS board 180 is coupled to the underside of the upper supporter 130 and can supply power to the electric range. The SMPS board 180 may be provided in pairs to supply power to multiple working coils 140a.

[0201] The EMI filter 190 is coupled to the lower surface of the upper supporter 130 and can suppress electromagnetic interference generated by electricity. Since the EMI filter 190 is electrically connected to the SMPS board 180, it may be provided in pairs to correspond to each of the pair of SMPS boards 180.

[0202] The inverter board 210 is coupled to the lower surface of the upper supporter 130 and can apply a resonant current to the working coil 140a. The inverter boards 210 may also be provided in pairs to supply resonant current to multiple working coils 140a.

[0203] On the other hand, as shown in Figure 17, an electric range may also be provided in which the inverter board 210 and the resonant board 220 are separated from each other. The resonant board 220 may be coupled to the lower surface of the upper supporter 130, positioned separately from the inverter board 210, and may include a resonant capacitor.

[0204] Thus, the lower surface of the upper supporter 130 may be equipped with various circuit boards necessary for the operation of the electric range. In this case, each circuit board may be arranged on the lower surface of the upper supporter 130 at positions spaced apart from each other.

[0205] Each substrate may be inverted and bonded to the lower surface of the upper supporter 130. That is, among the elements provided on each substrate, elements that occupy a relatively large volume may be arranged to be located at the bottom of the substrate.

[0206] This structure allows various substrates to be easily attached to the underside of the upper supporter 130 without any obstructions.

[0207] On the other hand, the indicator substrate 250 is provided in multiple units, coupled to the lower surface of the upper supporter 130 and arranged spaced apart from each other, and may include a light source. Unlike the other substrates, the indicator substrate 250 may be positioned in a location that partially overlaps with the other substrates.

[0208] The indicator board 250 may be formed in a bar shape, with its longitudinal direction parallel to the lateral direction of the upper supporter 130.

[0209] Referring to Figures 15 and 16, the slits 1323 formed in the upper supporter 130 may be formed with their longitudinal direction parallel to the vertical direction of the upper supporter 130, and may also be aligned in a single row in the vertical direction. Alternatively, the slits 1323 may be spaced apart from each other in the lateral direction of the upper supporter 130.

[0210] The indicator substrate 250 may be positioned so as to overlap with the slit 1323 through which light passes. Therefore, the indicator substrate 250 may be positioned so as to cover the slit 1323 on the lower surface of the upper supporter 130.

[0211] Therefore, the indicator board 250 may consist of multiple boards whose longitudinal direction is parallel to the vertical direction of the upper supporter 130 and which are spaced apart from each other in the lateral direction of the upper supporter 130.

[0212] Except for the indicator board 250, the various boards that operate the aforementioned electric ranges may be coupled to the underside of the boards at a distance from each other. Even if a pair of boards are provided, each piece may be arranged at a distance from each other.

[0213] Furthermore, a blower fan 230, which constitutes the cooling device, may be positioned on the lower surface of the upper supporter 130 at a distance from the substrate. On the other hand, the heat sink 240, which constitutes the cooling device, can be coupled to the upper supporter 130 in a configuration where it is coupled to the lower surface of the inverter substrate 210.

[0214] In this embodiment, a ferrite module 150 and a coil substrate 140 are coupled to the upper part of the supporter, and various substrates for operating the electric range and a cooling device can be coupled to the lower surface of the supporter.

[0215] Thus, the circuit board, blower fan 230, and other electrical components that are powered and involved in the operation of the electric range, as well as most other components, may be coupled to the upper supporter 130. Such a structure can significantly improve the assembly and disassembly performance of the electric range.

[0216] In other words, when assembling an electric range, the ferrite module 150, coil board 140, and input interface 160 can be assembled on the upper part of the upper supporter 130, and various circuit boards and cooling devices can be assembled on the lower part of the upper supporter 130.

[0217] Next, the insulation material 270 and mica sheet 280 are placed on the upper side of the upper supporter 130, and the lower supporter 260 is placed on the lower side of the upper supporter 130. After that, the cover plate 120 and the case 110 are joined together to complete the assembly of the electric range.

[0218] In this case, since the case 110 does not have a support structure to support the parts that are connected to the upper supporter 130, there is no need to adjust the support structure to accommodate these parts, and the assembly of the case 110 can be made very easy.

[0219] Similarly, when disassembling an electric range for repair, by disassembling the case 110 and cover plate 120, and then disassembling the lower supporter 260, the upper supporter 130, to which various parts are connected, can be immediately accessed, and any faulty parts can be easily replaced.

[0220] Furthermore, since the ferrite modules 150 are separated from each other and each is inserted into the fixing groove 131 of the upper supporter 130, only the faulty ferrite module 150 can be replaced, making it easy to repair the electric range.

[0221] On the other hand, referring to Figures 15 to 17, the assembly of various components on the lower surface of the upper supporter 130 can be carried out in the following order. First, the indicator substrate 250 can be attached to the lower surface of the upper supporter 130 so as to cover the slit 1323 at the position where the slit 1323 is formed.

[0222] Next, the various circuit boards and the blower fan 230 can be positioned in the designed locations on the underside of the upper supporter 130 and coupled to the upper supporter 130. At this time, the heat sink 240 can be coupled to the inverter circuit board 210. Of course, the various circuit boards, excluding the heat sink 240 and the indicator circuit board 250, can be coupled to the underside of the upper supporter 130 at positions spaced apart from each other.

[0223] Next, cable coupling work can be performed for electrical connections between various electrical components and for electrical connections with external power supplies.

[0224] Furthermore, the disassembly process can be carried out in the reverse order of the assembly process described above.

[0225] Figure 18 is an exploded view of the upper supporter 130 and ferrite module 150 according to one embodiment. Figure 19 is an exploded view of the ferrite module 150 according to one embodiment. The ferrite module 150 may include a ferrite core 151 and a core fixing part 152.

[0226] The ferrite core 151 forms a magnetic field, and multiple pieces may be arranged spaced apart from each other. The core fixing part 152 is coupled to the upper supporter 130 and is formed by insert injection with the ferrite core 151, and can fix the ferrite core 151.

[0227] The ferrite module 150 is made of ferrite material and can generate a magnetic field when current is applied to the working coil 140a. The core fixing portion 152 may be made of plastic material. The ferrite core 151 and the core fixing portion 152 may be manufactured by insert injection molding.

[0228] One ferrite module 150 can correspond to one working coil 140a. That is, one working coil 140a and one ferrite module 150 can form a set that generates a magnetic field.

[0229] The ferrite core 151 in a single ferrite module 150 may consist of multiple pieces arranged spaced apart from each other. The multiple pieces constituting a single ferrite core 151 can maintain their spaced-apart positions by a core fixing portion 152.

[0230] In this embodiment, the ferrite module 150 is manufactured by insert injection molding, and the ferrite core 151 and the core fixing portion 152 made of plastic material can be joined together. Since the shape of the core fixing portion 152 can be freely formed by insert injection molding, even if the ferrite pieces constituting the ferrite core 151 are provided in various shapes, the core fixing portion 152 can be easily manufactured in a shape that corresponds to the fixing groove 131 of the upper supporter 130.

[0231] Therefore, the ferrite pieces can be manufactured to have various shapes, and the core fixing portion 152 is manufactured to a shape corresponding to the fixing groove 131, so the ferrite module 150 may be stably bonded and attached to the upper supporter 130.

[0232] Figure 19 schematically shows the structure of the ferrite module 150. The ferrite module 150 shown in Figure 19 is composed of a ferrite core 151 made up of multiple pieces of different sizes, and the core fixing part 152 is provided in a structure that is open at the top and supports the lower side of the ferrite core 151.

[0233] The ferrite module 150 described below may be arranged such that, as schematically shown in Figure 19, the upper part of the core fixing portion 152 is at least partially open, and at least a portion of the ferrite core 151 placed in the core fixing portion 152 faces the coil substrate 140 which is positioned above it.

[0234] The following describes in detail the structure of the ferrite core 151, the core fixing portion 152, and the ferrite module 150 including these, according to various embodiments. The ferrite core 151 can be formed in first, second, or third types. Accordingly, the shape of the core fixing portion 152 may also be changed.

[0235] The ferrite core 151 may be formed in any of the following forms: a first type in which a portion of its upper surface is covered by the core fixing portion 152; a second type in which a fixing groove 1513 is formed for fixing to the core fixing portion 152; or a third type in which at least one inclined portion 1514 is formed at the corner and includes a fixing portion 1514 for fixing to the core fixing portion 152.

[0236] In the following, the terms Type 1, Type 2, and Type 3 may be used not only to distinguish between types of ferrite cores 151, but also to distinguish between types of core fixing parts 152 having shapes corresponding to each type, and types of ferrite modules 150 in which the ferrite core 151 and core fixing parts 152 are combined.

[0237] Figure 20 is a perspective view of a ferrite module 150 according to another embodiment. Figure 21 is a plan view of Figure 20. Figure 22 is a side view of Figure 21. Figure 23 is a cross-sectional view of Figure 21 oriented in the direction of 23-23. Figure 24 is a perspective view showing a ferrite core 151 according to one embodiment.

[0238] Figures 20 to 24 show the first type of ferrite core 151. The structure common to both the first and second types will be explained first.

[0239] In the case of the first or second type, the ferrite core 151 may include a first ferrite 1511 and a second ferrite 1512. The first ferrite 1511 may be provided in multiples, each positioned at one corner of the core fixing portion 152, which is provided in a rectangular shape. The second ferrite 1512 may be provided in multiples, with at least one positioned between the multiple first ferrites 1511.

[0240] The first ferrite 1511 may be formed in the shape of a plate having approximately a predetermined thickness and may have an overall rectangular parallelepiped shape. The second ferrite 1512 may be provided as a rod-shaped hexahedron having the same or similar thickness as the first ferrite 1511 and a smaller volume than the first ferrite 1511.

[0241] Furthermore, as shown in Figure 24, for example, the first ferrite 1511 may be formed in a square shape, and the second ferrite 1512 may be formed in a rectangular shape. In this case, the length of the longer side of the second ferrite 1512 may be formed to correspond to the length of one side of the first ferrite 1511.

[0242] According to the structure of the first ferrite 1511 and the second ferrite 1512 in the embodiment, the first ferrite 1511 and the second ferrite 1512 can be combined to correspond to the shape of the square fixing groove 131 formed in the upper supporter 130, making it easy to manufacture a ferrite core 151 and a ferrite module 150 that have an overall square shape.

[0243] However, the shapes of the first ferrite 1511 and the second ferrite 1512 are not limited to these, and may be formed into various other shapes. Also, in this embodiment, one ferrite module 150 is provided with two types of ferrite having different shapes from each other, but this is not limited to this, and one ferrite module 150 may be provided with three or more types of ferrite having different shapes from each other.

[0244] In the embodiment, the ferrite core 151 can be formed by arranging multiple ferrites of the same or different shapes and insert-injecting them with a core fixing portion 152 to form a ferrite module 150. The specific shape of the core fixing portion 152 that supports and fixes the ferrite core 151 by insert injection can vary, and these various core fixing portion 152 structures can be easily formed.

[0245] Therefore, by combining ferrites of various sizes and shapes, it is possible to easily manufacture a shape that corresponds to the anchoring groove 131 of the upper supporter 130, thereby improving the productivity of the ferrite module 150.

[0246] The second ferrite 1512 may be positioned such that a portion of it is in contact with the first ferrite 1511 between multiple first ferrites 1511, and the other portion is positioned such that it is separated from the first ferrites 1511 between multiple first ferrites 1511.

[0247] With this structure, the first ferrite 1511 and the second ferrite 1512 may have a roughly rectangular shape overall, considering the outline.

[0248] For example, as mentioned above, the working coil 140a may have a rectangular shape overall, considering its outer outline. Therefore, the ferrite core 151 can be provided in a rectangular shape overall by combining the first ferrite 1511 and the second ferrite 1512, and can correspond in shape to the rectangular working coil 140a.

[0249] This can improve the magnetic field generation efficiency in the working coil 140a and the ferrite core 151. In other words, the more the working coil 140a and the ferrite core 151 overlap each other, the stronger the generated magnetic field becomes. In this embodiment, the outer line shapes of the working coil 140a and the ferrite core 151 are rectangular and correspond to each other, which can improve the magnetic field generation efficiency compared to the case where the outer line shapes are different.

[0250] In a position where the first ferrite 1511 and the second ferrite 1512 are arranged at a distance from each other, the second ferrite 1512 may be arranged in multiple quantities, and the multiple second ferrite 1512 may be arranged at a distance from each other.

[0251] If the ferrite module 150 has a rectangular shape as a whole, the lateral and vertical lengths of the ferrite module 150 may differ. In such a case, the first ferrite 1511 and the second ferrite 1512 need to be arranged so that the overall shape of the ferrite core 151 is rectangular.

[0252] In this embodiment, when the square first ferrite 1511 is placed at the corner of the core fixing portion 152, as shown in Figure 21, a considerable separation space may be formed between the first ferrite 1511 along the horizontal side, because the ferrite module 150 is a rectangle whose horizontal side is longer than its vertical side.

[0253] Multiple, for example, two second ferrites 1512 are arranged in these separation spaces so as to be separated from each other, and the outer line of the ferrite core 151 may have a substantially rectangular shape.

[0254] In the first type, the core fixing portion 152 may include a base plate 1521, a bent portion 1522, and an extended portion 1523. The base plate 1521 constitutes the lower part of the core fixing portion 152 and can close the lower part of the core fixing portion 152. The lower surfaces of the first ferrite 1511 and the second ferrite 1512 may be stably supported by the base plate 1521.

[0255] The folded portion 1522 may be folded at the end of the base plate 1521. The folded portion 1522 can extend upward from the base plate 1521 to form a space in which the first ferrite 1511 and the second ferrite 1512 are arranged.

[0256] The extended portion 1523 extends from the folded portion 1522 and can cover a portion of the upper surfaces of the first ferrite 1511 and the second ferrite 1512. The extended portion 1523 may be formed on the upper part of the core fixing portion 152 along the edge that forms the outer rim of the core fixing portion 152.

[0257] The extended portion 1523 covers a portion of the upper surfaces of the first ferrite 1511 and the second ferrite 1512, and can serve to fix the first ferrite 1511 and the second ferrite 1512 so that they do not detach from the core fixing portion 152.

[0258] Since the upper part of the core fixing portion 152 other than the extended portion 1523 is open, the ferrite core 151 placed in these open portions is positioned to face the coil substrate 140 located above it, which can improve the magnetic field generation efficiency.

[0259] On the other hand, the space between the extended portion 1523 and the base plate 1521, where the first ferrite 1511 and the second ferrite 1512 are not placed, may also be filled with plastic injection material. This allows the first ferrite 1511 and the second ferrite 1512 to be stably fixed to the core fixing portion 152.

[0260] Figure 25 is a perspective view of the ferrite module 150 according to another embodiment. Figure 26 is a plan view of Figure 25. Figure 27 is a side view of Figure 25. Figure 28 is a cross-sectional view of Figure 26, facing the 28-28 direction.

[0261] Figures 25 to 28 show the second type of ferrite core 151. Below, we can omit explanations that overlap with those for the first type. On the other hand, Figure 24 shows both the first and second type of ferrite core 151. The difference between the first and second types is the presence or absence of the fixing groove 1513.

[0262] In the second type of ferrite core 151, fixing grooves 1513 may be formed by recessing into the first ferrite 1511 and the second ferrite 1512. In the second type, the fixing grooves 1513 may be formed at the ends of the first ferrite 1511 and the second ferrite 1512, respectively.

[0263] Since the core fixing portion 152 at the end of each ferrite is joined, the fixing groove 1513 for joining with the fixing projection 1524 of the core fixing portion 152 may be formed on the edge of the end of each ferrite.

[0264] The width and number of fixing grooves 1513 may vary depending on the volume, area, and shape of the first ferrite 1511 and the second ferrite 1512.

[0265] In the first ferrite 1511 that has a relatively small volume and area and a substantially rod shape, the space in which the fixing groove 1513 can be formed is limited. Therefore, for example, one fixing groove 1513 may be formed at an end portion of the first ferrite 1511 in the longitudinal direction. Further, a fixing groove 1513 having a relatively narrow width may be formed in the first ferrite 1511.

[0266] A plurality of fixing grooves 1513 may be formed in the second ferrite 1512 that has a relatively large volume and area and a substantially square shape.

[0267] In the second ferrite 1512, the plurality of fixing grooves 1513 may be disposed on an outer contour of the ferrite module 150 and formed on each side of the second ferrite 1512 that intersect each other. Further, a fixing groove 1513 having a relatively wide width may be formed in the second ferrite 1512.

[0268] Thereby, the second ferrite 1512 having a relatively large volume and area may be stably fixed to the core fixing portion 152 by the plurality of fixing grooves 1513 of the above-described form.

[0269] The core fixing portion 152 corresponding to the second type case may include a bottom plate 1521, a bent portion 1522, and a fixing protrusion 1524. The bottom plate 1521 and the bent portion 1522 are as described above.

[0270] The fixing protrusion 1524 is bent from the bent portion 1522 to extend and can be coupled to the fixing groove 1513. In insert injection molding, an injected material of plastic material may flow into the bent portion 1522 and be cured to form the fixing protrusion 1524.

[0271] The first ferrite 1511 is provided to have a larger area than the second ferrite 1512, and therefore, as described above, the width of the fixing groove 1513 of the first ferrite 1511 may be larger than the width of the fixing groove 1513 of the second ferrite 1512. Correspondingly, the fixing protrusion 1524 may include a first sub-protrusion 1524a and a second sub-protrusion 1524b that have different sizes.

[0272] The first sub-protrusion 1524a may be arranged at a position coupled to the first ferrite 1511. The second sub-protrusion 1524b may be arranged at a position coupled to the second ferrite 1512.

[0273] The width of the first sub-protrusion 1524a may be formed to be larger than the width of the second sub-protrusion 1524b. As described above, the width of the fixing groove 1513 of the first ferrite 1511 is formed to be larger than that of the fixing groove 1513 of the second ferrite 1512. Correspondingly, the width of the first sub-protrusion 1524a coupled to the fixing groove 1513 of the first ferrite 1511 may be relatively large, and the width of the second sub-protrusion 1524b coupled to the fixing groove 1513 of the second ferrite 1512 may be relatively small.

[0274] In the case of the second type, since the area of the fixing protrusion 1524 is smaller than that of the extending portion 1523 of the first type, the area of the upper surface of the ferrite core 151 exposed to the outside may be larger for the first type than for the second type. Thereby, the ferrite module 150 including the second-type ferrite core 151 can have improved magnetic field generation efficiency compared with the first type.

[0275] However, in the case of the second type, a fixing groove 1513 is formed in each ferrite, and in order to stably fix each ferrite to the core fixing portion 152, the second type includes a first fixing wall 1525 and a second fixing wall 1526 which will be described later, so that the overall structure may be complicated compared with the first type.

[0276] The first fixing projection 1524 and the second fixing projection 1524 have a considerably smaller area than the first ferrite 1511 and the second ferrite 1512. With this structure, the first fixing projection 1524 and the second fixing projection 1524 do not need to be stably fixed in the core fixing portion 152.

[0277] Therefore, the core fixing portion 152 corresponding to the second type of ferrite core 151 may include a first fixing wall 1525 and a second fixing wall 1526 in order to stably fix the first fixing projection 1524 and the second fixing projection 1524 and prevent them from detaching from the designed position.

[0278] The first fixing wall 1525 and the second fixing wall 1526 can contact at least a portion of the sides of the first ferrite 1511 and the second ferrite 1512, fixing the position of each ferrite and allowing them to be coupled to the core fixing portion 152.

[0279] The first fixing wall 1525 is formed to protrude from the bottom plate 1521 at the edge of the first ferrite 1511, and is provided in a pair spaced apart from each other, and can contact and fix parts of the first ferrite 1511 and the second ferrite 1512.

[0280] The second fixing wall 1526 is positioned between a pair of first fixing walls 1525, is formed to protrude from the bottom plate 1521, and is formed to surround a plurality of second ferrites 1512, thereby allowing the second ferrites 1512 to be fixed in place.

[0281] The first fixed wall 1525 and the second fixed wall 1526 may be formed to contact the side surface of the ferrite but not obstruct the top surface of the ferrite. This allows the top surface of the ferrite to be fully exposed except for the area where the fixed projection 1524 overlaps, potentially improving the magnetic field generation efficiency of the ferrite module 150.

[0282] The first ferrite 1511 and the second ferrite 1512 are stably fixed to the core fixing part 152 by the first sub-projection 1524a, the second sub-projection 1524b, the first fixing wall 1525, and the second fixing wall 1526, so that they can maintain their position as designed.

[0283] In the first and second types, the ferrite module 150 may have a structure for being fixedly coupled to the upper supporter 130 while fixed in the anchoring groove 131. Such a structure may be provided, for example, through coupling holes 1527 or coupling projections 1528. The core fixing portion 152 may be provided with at least one of these coupling holes 1527 and coupling projections 1528.

[0284] The core fixing portion 152 may be formed in the central part, penetrate the bottom plate 1521 of the core fixing portion 152, and include a coupling hole 1527 into which a coupling device is coupled. On the other hand, a hole or groove, or other screw coupling structure, may be formed on the lower surface of the fixing groove 131 of the upper supporter 130 at a position corresponding to the coupling hole 1527 into which a coupling device is coupled.

[0285] A fastening device such as a screw bolt or screw nail can be inserted into the connecting hole 1527 to fasten the core fixing part 152 to the upper supporter 130.

[0286] The core fixing portion 152 may include fastening projections 1528 that protrude from the outer surface of a bent portion 1522 which is bent at the end of the bottom plate 1521 of the core fixing portion 1522 and fasten to the upper supporter 130. The fastening projections 1528 may protrude from the outer surface of a pair of bent portions 1522 which are arranged in opposing positions, and multiple projections may be provided on a single bent portion 1522.

[0287] In the upper supporter 130, holes or grooves may be formed in the wall forming the fastening groove 131, with shapes and numbers corresponding to the positions corresponding to the fastening projections 1528, into which the fastening projections 1528 are fitted.

[0288] The fastening protrusion 1528 can be coupled to a hole or groove formed in the upper supporter 130 by shape fitting or interference fitting. Therefore, the ferrite module 150 including the core fixing portion 152 can be easily attached to and detached from the upper supporter 130.

[0289] Coupling using the fastening protrusion 1528 has the advantage that the ferrite module 150 can be easily attached to and detached from the upper supporter 130. On the other hand, the method of fastening a coupling tool to the fastening hole 1527 has the advantage that the ferrite module 150 can be stably and firmly coupled to the upper supporter 130, and of course the ferrite module 150 can also be attached to and detached from the upper supporter 130.

[0290] Fig. 29 is a perspective view of a ferrite core 151 according to another embodiment. Fig. 30 is a plan view of Fig. 29. Fig. 31 is a perspective view of a ferrite module 150 according to another embodiment. Fig. 32 is a plan view of Fig. 31. In Figs. 29 to 32, a third-type ferrite core 151 is shown.

[0291] In the case of the third type, the ferrite module 150 may be formed in a substantially square shape. Accordingly, the shape of the frame of the seating groove 131 in which the ferrite module 150 is seated may also be formed in a substantially square shape.

[0292] In the case of the third type, a plurality of ferrite cores 151 are provided, and the plurality of ferrite cores 151 may be spaced apart from each other and radially arranged with reference to the center of the core fixing portion 152.

[0293] The ferrite core 151 is provided from a plurality of pieces, and the whole of each ferrite core 151 is radially arranged with each other to form one entire ferrite core 151. Hereinafter, the ferrite core 151 may refer to each of the plurality of pieces.

[0294] In the third type, the ferrite cores 151 may be arranged in the same or very similar shapes with respect to the center of the core fixing portion 152. Since the same ferrite cores 151 are arranged spaced apart from each other with respect to the center of the core fixing portion 152, the ferrite cores 151 may be arranged radially, which is symmetrical in both the lateral and vertical directions as a whole.

[0295] Therefore, the inclined portions formed on each of the multiple ferrite cores 151 may be arranged radially from one another with respect to the center of the core fixing portion 152. With such a structure, each ferrite core 151 may be stably and uniformly fixed to the core fixing portion 152 by the inclined portions 1514 that are uniformly distributed throughout the core fixing portion 152.

[0296] The ferrite core 151 is formed in a rectangular shape, or more specifically, in a square shape. In the third type, the ferrite core 151 may have an inclined portion 1514.

[0297] The inclined portions 1514 may be provided in pairs, each formed at corresponding corners in the diagonal direction of the ferrite core 151. A portion of the core fixing portion 152 may be covered by the inclined portions 1514, thereby fixing the ferrite core 151 to the core fixing portion 152.

[0298] In insert injection molding, the plastic material injection may flow into the upper side of the inclined portion 1514 and harden, forming the first cover 1529 and the second cover 1531, which will be described later. As a result, the ferrite core 151 may be stably bonded and fixed to the core fixing portion 152 by the first cover 1529 and the second cover 1531.

[0299] The ferrite core 151 may have chamfered portions 1515 formed on the edges where multiple ferrite cores 151 face each other. The chamfered portions 1515 may be formed on the edges where the inclined portions 1514 are formed.

[0300] As a result, when multiple ferrite cores 151 are arranged, a rhombus-shaped space may be formed in the center of the entire ferrite core 151, as shown in Figure 30.

[0301] Insert injection molding allows the ferrite core 151 to be firmly supported by stacking injection-molded parts, which are integrally formed with the base plate 1521, in these rhombus-shaped spaces. These injection-molded parts may be connected to the second cover 1531, which will be described later.

[0302] The core fixing portion 152 corresponding to the third type ferrite core 151 may include a base plate 1521, a bent portion 1522, a first cover 1529, a second cover 1531, and a separation wall 1532. The base plate 1521 and the bent portion 1522 are as described above.

[0303] The first cover 1529 is formed on the edge of the core fixing portion 152 and is provided to cover the inclined portion 1514, thereby fixing the ferrite core 151. The second cover 1531 is formed in the center of the core fixing portion 152 and is provided to cover the inclined portion 1514 on which the chamfered portion 1515 is formed, thereby fixing the ferrite core 151.

[0304] The first cover 1529 and the second cover 1531 are positioned diagonally opposite each other at the ends of the ferrite core 151, fixing the corner portions of the ferrite core 151 and enabling the ferrite core 151 to be stably and firmly connected to the core fixing portion 152.

[0305] At positions corresponding to the first cover 1529 and the second cover 1531, inclined portions 1514 may be formed on the ferrite core 151. By covering the inclined portions 1514 with the first cover 1529 and the second cover 1531 and connecting the ferrite core 151 to the core fixing portion 152, the height of the ferrite core 151 and the height of the core fixing portion 152 are made similar, so that the upper surface of the ferrite module 150 may have a substantially flattened shape.

[0306] By providing a flattened upper surface for the ferrite module 150, the coil substrate 140 can be easily and stably positioned on top of the ferrite module 150, and the gap between the ferrite module 150 and the coil substrate 140 can be significantly reduced.

[0307] The separation wall 1532 protrudes from the bottom plate 1521, connects the bent portion 1522 and the second cover 1531, and is positioned between the multiple ferrite cores 151 to separate them from one another.

[0308] The separation walls 1532 formed between each ferrite core 151 contact the sides of each ferrite core 151, allowing them to be more firmly bonded to the core fixing portion 152. Furthermore, the separation walls 1532 can restrict each ferrite core 151 from moving laterally relative to the core fixing portion 152. This allows the separation walls 1532 to maintain each ferrite core 151 in its designed position, preventing it from moving out of place.

[0309] Figure 33 is a perspective view of the ferrite module 150 shown in Figure 29, looking from below towards above. Figure 34 is an exploded view of the upper supporter 130 and the ferrite module 150 shown in Figure 29. Figure 35 is a cross-sectional view of a part of an electric range.

[0310] In the third type, in order to connect the ferrite module 150 to the upper supporter 130, for example, the core fixing portion 152 may be provided with at least one of the fastening projections 1528 or the central projection 1534.

[0311] As described above, the fastening projections 1528 may, for example, protrude from the outer surface of a pair of bent portions 1522 that are positioned opposite each other, and multiple projections may be provided on a single bent portion 1522.

[0312] In the upper supporter 130, holes or grooves may be formed in the wall forming the fastening groove 131, with shapes and numbers corresponding to the positions of the fastening projections 1528, into which the fastening projections 1528 fit.

[0313] The core fixing portion 152 may include a central projection 1534 that protrudes from the lower surface of the core fixing portion 152 in the central part and fits into a hole formed in the upper supporter 130.

[0314] The central projection 1534 is fitted into a hole or groove formed at the bottom of the attachment groove 131 of the upper supporter 130, thereby enabling the ferrite module 150 to be detachably coupled to the upper supporter 130. To prevent the central projection 1534 from easily coming loose while coupled to the upper supporter 130, the central projection 1534 may be provided in a hook shape, for example.

[0315] The core fixing portion 152 may include a fitting projection 1533 at the corner of the core fixing portion 152 that protrudes outward from the bent portion 1522 and fits into the upper supporter 130.

[0316] The fitting projection 1533 may be provided to ensure that the ferrite module 150 is stably attached to the anchoring groove 131, and also to prevent the ferrite module 150 from becoming dislodged from its position or coming out of the anchoring groove 131 due to external impact.

[0317] Since the fitting projections 1533 are positioned at each corner of the square-shaped core fixing portion 152, there may be, for example, a total of four. The fitting projections 1533 may be formed integrally with the first cover 1529 at the position where the first cover 1529 is formed.

[0318] The upper supporter 130 may have a fitting groove 137 formed in a position corresponding to the fitting projection 1533 into which the fitting projection 1533 is fitted. The fitting groove 137 may be formed by a part of the upper supporter 130 being recessed into the corner portion of the anchoring groove 131 which has a square-shaped edge.

[0319] The fitting projection 1533 and the fitting groove 137 can be connected to each other in a shape-fitting manner. When the fitting projection 1533 is connected to the fitting groove 137, the core fixing portion 152 is effectively restricted from rotation or lateral movement and can be maintained in the designed position.

[0320] Therefore, even if the electric range is subjected to external impacts, the ferrite module 150 will not easily deviate from its position due to these impacts, thus improving the ease of assembly and performance of the electric range.

[0321] In the embodiment, the ferrite module 150 may be provided in various structures of type 1, type 2, and type 3. Each type may have its own characteristics along with structural differences. Therefore, by considering the characteristics of each electrical range and selecting and designing a suitable type of ferrite module 150, the manufacturer can easily manufacture the ferrite module 150, improve magnetic field generation efficiency, and save manufacturing costs.

[0322] As described above, the present invention has been explained with reference to the illustrative drawings, but it is clear that the present invention is not limited to the embodiments and drawings disclosed herein, and that various modifications can be made by an ordinary person skilled in the art within the scope of the technical concept of the present invention. Furthermore, even if the effects of the configuration of the present invention are not explicitly described in the embodiments described above, it is natural that the effects that can be predicted by such configuration should also be recognized.

[0323] [Claims when filing an international application] [Claim 1] It is an electric microwave oven, A cover plate on which the object to be heated is positioned; An upper supporter positioned below the cover plate; A coil substrate comprising multiple components positioned on top of the upper supporter and spaced apart from one another, on which working coils are printed; The system comprises a plurality of ferrite modules, which are positioned on the upper part of the upper supporter, on the lower side of the coil substrate, and at positions corresponding to each of the plurality of coil substrates; The ferrite module described above is A ferrite core that forms a magnetic field and has multiple pieces arranged apart from each other, An electric range comprising a core fixing part that is coupled to the upper support and fixes the ferrite core. [Claim 2] The ferrite core is A first type is provided such that a portion of the upper surface is covered by the core fixing portion. A second type having a fixing groove formed for fixing to the core fixing part, or The electric range according to claim 1, wherein at least one of the corners is formed and comprises an inclined portion for fixing to the core fixing portion, in any third type. [Claim 3] In the case of Type 1 or Type 2, The ferrite core is A plurality of first ferrites are arranged at each corner of the core fixing portion, The electric range according to claim 2, comprising a plurality of second ferrites, at least one of which is positioned between a plurality of first ferrites. [Claim 4] The aforementioned second ferrite is A portion of the second ferrite is arranged between a plurality of the first ferrites so as to be in contact with the first ferrites. The electric range according to claim 3, wherein the other part of the second ferrite is arranged between a plurality of first ferrites so as to be separated from the first ferrites. [Claim 5] At a position where the first ferrite and the second ferrite are arranged to be separated from each other, The electric range according to claim 4, wherein the second ferrite is arranged in a plurality, and the plurality of second ferrites are arranged spaced apart from each other. [Claim 6] In the case of type 1, The core fixing portion is The base plate and A bent portion that is folded at the end of the bottom plate, The electric range according to claim 5, further comprising an extended portion that is bent and extends from the bent portion and covers a part of the upper surface of the first ferrite and the second ferrite. [Claim 7] In the case of type 2, The fixing grooves are formed at the ends of the first ferrite and the second ferrite, respectively. The core fixing portion is The base plate and A bent portion that is folded at the end of the bottom plate, The electric range according to claim 5, further comprising a fixing projection that extends from the bent portion and connects to the fixing groove. [Claim 8] The electric range according to claim 3, wherein the core fixing portion is formed in the center and has a fastening hole formed to penetrate the bottom plate of the core fixing portion, into which a coupling device is fastened. [Claim 9] The electric range according to claim 3, wherein the core fixing portion includes fastening projections that protrude from the outer surface of a bent portion which is bent at the end of the bottom plate of the core fixing portion and are fastened to the upper supporter. [Claim 10] The aforementioned first ferrite is square in shape, The second ferrite is rectangular in shape, The electric range according to claim 3, wherein the length of the long side of the second ferrite corresponds to the length of one side of the first ferrite. [Claim 11] In the case of type 3, The ferrite core is provided in multiple units, The electric range according to claim 2, wherein the plurality of ferrite cores are arranged radially at a distance from each other, with respect to the center of the core fixing portion. [Claim 12] In the case of type 3, The ferrite core is provided in multiple units, The electric range according to claim 2, wherein the plurality of ferrite cores are identical in shape to each other, with respect to the center of the core fixing portion. [Claim 13] The electric range according to claim 12, wherein the inclined portions formed on each of the plurality of ferrite cores are arranged radially from each other with respect to the center of the core fixing portion. [Claim 14] The electric range according to claim 11, wherein the inclined portions are formed in pairs at corners corresponding to each other in the diagonal direction of the ferrite core. [Claim 15] The ferrite core has chamfered portions formed at the corners where multiple ferrite cores face each other. The electric range according to claim 11, wherein the chamfered portion is formed at the corner where the inclined portion is formed. [Claim 16] The core fixing portion is The base plate and A bent portion that is folded at the end of the bottom plate, A first cover is formed at the corner of the core fixing portion, provided to cover the inclined portion, and fixes the ferrite core, A second cover is provided that is formed in the center of the core fixing portion and covers the inclined portion where the chamfered portion is formed, and fixes the ferrite core, The electric range according to claim 15, further comprising: a separation wall that protrudes from the bottom plate, connects the folded portion and the second cover, and is positioned between a plurality of ferrite cores to separate them from each other. [Claim 17] The electric range according to claim 16, wherein the core fixing portion is provided with a fitting projection at the corner of the core fixing portion that protrudes outward from the bent portion of the core fixing portion and is fitted into the upper supporter. [Claim 18] The electric range according to claim 17, wherein the upper supporter has a fitting groove formed at a position corresponding to the fitting projection into which the fitting projection is fitted. [Claim 19] The electric range according to claim 11, wherein the core fixing portion has a central projection that protrudes from the lower surface of the core fixing portion in the center and fits into a hole formed in the upper supporter. [Claim 20] The electric range according to claim 1, wherein the core fixing portion is provided to be formed by insert injection with the ferrite core.

Claims

1. It is an electric microwave oven, A cover plate on which the object to be heated is positioned on the upper surface; An upper supporter positioned below the cover plate; A coil substrate comprising multiple units positioned on top of the upper supporter and spaced apart from each other, on which working coils are printed; The system comprises a plurality of ferrite modules, which are positioned on the upper part of the upper supporter, on the lower side of the coil substrate, and at positions corresponding to each of the plurality of coil substrates; The ferrite module described above is A ferrite core that forms a magnetic field and has multiple pieces arranged apart from each other, An electric range comprising a core fixing part that is coupled to the upper support and fixes the ferrite core.

2. The ferrite core is A first type is provided such that a portion of the upper surface is covered by the core fixing portion. A second type having a fixing groove formed for fixing to the core fixing part, or The electric range according to claim 1, wherein at least one of the corners is formed and has an inclined portion for fixing to the core fixing portion, in any third type of form.

3. In the case of Type 1 or Type 2, The ferrite core is A plurality of first ferrites are arranged at each corner of the core fixing portion, The electric range according to claim 2, comprising: a plurality of second ferrites, at least one of which is positioned between a plurality of first ferrites.

4. The second ferrite is, A portion of the second ferrite is arranged between a plurality of the first ferrites so as to be in contact with the first ferrites. The electric range according to claim 3, wherein the other part of the second ferrite is arranged between a plurality of first ferrites so as to be separated from the first ferrites.

5. At a position where the first ferrite and the second ferrite are arranged to be separated from each other, The electric range according to claim 4, wherein the second ferrite is arranged in a plurality, and the plurality of second ferrites are arranged spaced apart from each other.

6. In the case of type 1, The core fixing portion is The base plate and A bent portion that is folded at the end of the bottom plate, The electric range according to claim 5, further comprising an extended portion that is bent and extends from the bent portion and covers a part of the upper surface of the first ferrite and the second ferrite.

7. In the case of type 2, The fixing grooves are formed at the ends of the first ferrite and the second ferrite, respectively. The core fixing portion is The base plate and A bent portion that is folded at the end of the bottom plate, The electric range according to claim 5, further comprising a fixing projection that extends from the bent portion and connects to the fixing groove.

8. The electric range according to claim 3, wherein the core fixing portion is formed in the center and has a fastening hole formed so as to penetrate the bottom plate of the core fixing portion, into which a coupling device is fastened.

9. The electric range according to claim 3, wherein the core fixing portion includes fastening projections that protrude from the outer surface of a bent portion which is bent at the end of the bottom plate of the core fixing portion and are fastened to the upper supporter.

10. The first ferrite is square in shape, The second ferrite is rectangular in shape, The electric range according to claim 3, wherein the length of the long side of the second ferrite corresponds to the length of one side of the first ferrite.

11. In the case of type 3, The ferrite core is provided in multiple units, The electric range according to claim 2, wherein the plurality of ferrite cores are arranged radially at a distance from each other, with respect to the center of the core fixing portion.

12. In the case of type 3, The ferrite core is provided in multiple units, The electric range according to claim 2, wherein the plurality of ferrite cores are identical in shape to each other, with respect to the center of the core fixing portion.

13. The electric range according to claim 12, wherein the inclined portions formed on each of the plurality of ferrite cores are arranged radially from each other with respect to the center of the core fixing portion.

14. The electric range according to claim 11, wherein the inclined portions are formed in pairs at corners corresponding to each other in the diagonal direction of the ferrite core.

15. The ferrite core has chamfered portions formed at the corners where multiple ferrite cores face each other. The electric range according to claim 11, wherein the chamfered portion is formed at the corner where the inclined portion is formed.

16. The core fixing portion is The base plate and A bent portion that is folded at the end of the bottom plate, A first cover is formed at the corner of the core fixing portion, provided to cover the inclined portion, and fixes the ferrite core, A second cover is provided that is formed in the center of the core fixing portion and covers the inclined portion where the chamfered portion is formed, and fixes the ferrite core, The electric range according to claim 15, further comprising: a separation wall that protrudes from the bottom plate, connects the folded portion and the second cover, and is positioned between a plurality of ferrite cores to separate them from each other.

17. The electric range according to claim 16, wherein the core fixing portion has a fitting projection at the corner of the core fixing portion that protrudes outward from the bent portion of the core fixing portion and is fitted into the upper supporter.

18. The electric range according to claim 17, wherein the upper supporter has a fitting groove formed at a position corresponding to the fitting projection into which the fitting projection is fitted.

19. The electric range according to claim 11, wherein the core fixing portion has a central projection that protrudes from the lower surface of the core fixing portion in the center and fits into a hole formed in the upper supporter.

20. The electric range according to claim 1, wherein the core fixing portion is provided to be formed by insert injection with the ferrite core.

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