Electric range

Abstract

An embodiment of an electric range may include multiple ferrite modules disposed on an upper supporter, disposed beneath multiple coil substrates, and disposed at positions corresponding to the coil substrates. Each of the ferrite modules includes multiple ferrite cores, and the lateral ends of working coils may be disposed at the same positions as or inside the lateral ends of the ferrite cores. The working coils and the ferrite cores may have a rectangular outer shape. A first length defined as the length between a pair of parallel outer sides of the ferrite cores may be equal to or longer than a second length defined as the length between a pair of parallel outer sides of the working coils.

Description

electric range

[0001] The present invention relates to an electric range, and more particularly, to an electric range using an induction heating method.

[0002] The material described in this section merely provides background information for the present invention and does not constitute prior art.

[0003] A variety of cooking appliances are used to heat food in homes and restaurants. These include gas ranges that use gas and electric ranges that use electricity.

[0004] Electric ranges are broadly divided into resistance heating and induction heating methods.

[0005] The electrical resistance method is a method of generating heat by applying current to a metal resistance wire or a non-metallic heating element such as silicon carbide, and heating the object to be heated (e.g., a cooking vessel such as a pot or frying pan) by radiating or conducting the generated heat.

[0006] Induction heating is a method of applying high-frequency power to a coil to generate a magnetic field around the coil, and using the eddy current generated from the generated magnetic field to heat a heated object made of metal.

[0007] Looking at the basic heating principle of the induction heating method, when current is applied to the working coil, the object to be heated is inductively heated, generating heat, and the object to be heated is heated by the generated heat.

[0008] A typical electric range features a large coil area to which power is applied. Furthermore, the object being heated must be positioned so that it overlaps this large coil area to be heated.

[0009] Therefore, since the coil of the electric range occupies a large area, a heating area corresponding to a small number of coils with a large area is provided on the upper part of the electric range.

[0010] Because the heating zones are large and few in number, the cover plate of an electric range with a limited surface area is equipped with a small number of heating zones. Furthermore, because the heating zones are large in area, even if an electric range is equipped with multiple heating zones, the unheated area between the heating zones occupies a large area.

[0011] This structure limits the space available for heating objects on electric ranges, and even when heating small objects, a single large heating area must be used, potentially resulting in significant power consumption. This can be inconvenient for users.

[0012] To compensate for these shortcomings, coils with small, plate-shaped structures can be placed in electric ranges. Placing multiple coils of small area in an electric range reduces the space between the coils, allowing only the coils containing the object to be heated to operate. This increases the space efficiency of the range and reduces power consumption.

[0013] The purpose of the present invention is to provide an electric range having a structure that efficiently transmits a magnetic field to a heated object and improves the heating efficiency of the heated object.

[0014] In addition, an object of the present invention is to provide an electric range having a structure that improves the cooling efficiency of a substrate having a heat generating element.

[0015] The purposes of the present invention are not limited to those mentioned above. Other purposes and advantages of the present invention not mentioned above can be understood through the following description and will be more clearly understood through embodiments of the present invention. Furthermore, it will be readily apparent that the purposes and advantages of the present invention can be realized by the means and combinations thereof set forth in the claims.

[0016] An embodiment of an electric range may include a plurality of ferrite modules arranged on an upper portion of an upper supporter, arranged on a lower portion of a coil substrate, and arranged at positions corresponding to each of the plurality of coil substrates. The ferrite module may include a plurality of ferrite cores, and a lateral end of a working coil may be arranged at the same position as or inside a lateral end of a ferrite core.

[0017] The working coil and the ferrite core are formed with a rectangular outer shape, and the first length defined as the length between a pair of parallel outer sides of the ferrite core may be provided to be equal to or longer than the second length defined as the length between a pair of parallel outer sides of the working coil.

[0018] The area of ​​the rectangle formed by the outer line of the ferrite core can be equal to or larger than the area of ​​the rectangle formed by the outer line of the working coil.

[0019] Accordingly, the ferrite core can block the magnetic field generated from the working coil and directed downward, thereby preventing the magnetic field from leaking downward.

[0020] An embodiment of an electric range may include a heat sink that is coupled to the lower surface of an inverter board and arranged in a longitudinal direction parallel to the air exhaust direction of a blower fan; an air guide that is arranged to surround the heat sink and guides the flow of air passing through the heat sink; and a lower supporter that is arranged below the upper supporter, is accommodated in a case, and supports the upper supporter.

[0021] The air guide may include an air inlet hole arranged to face the outlet of the blower fan; a pair of side guides that cover the side of the heat sink and are spaced apart from each other; a lower guide that covers the lower surface of the heat sink and is respectively connected to the pair of side guides; an air discharge hole that discharges air toward the bottom plate of the case; and an exhaust guide that forms the air discharge hole and changes the direction of air flow.

[0022] The discharge guide may include an extension guide that extends from a pair of side guides and is provided as a pair; and a flow change guide that is connected to the pair of extension guides and is formed into a curved surface to change the flow direction of air discharged to the outside from the air guide to a downward direction.

[0023] An air guide of one embodiment may be configured to be coupled to the inverter substrate. Thus, an air guide occupying a significant volume can be coupled to the upper supporter.

[0024] In other embodiments, the air guide may be configured to be coupled to the lower supporter. Therefore, the need for consideration of the air guide layout space and coupling structure in the lower supporter, which includes a number of substrates, heat sinks, blower fans, and other components, can be reduced.

[0025] In the electric range according to the present invention, the first length of the ferrite core may be formed to be equal to or longer than the second length of the working coil. Accordingly, the ferrite core can block the magnetic field generated by the working coil and directed downward, thereby directing it back toward the heated object, thereby improving the magnetic field density transmitted to the heated object.

[0026] Therefore, the magnetic field can be efficiently transmitted to the heated object, thereby improving the energy efficiency and heating efficiency of the electric range.

[0027] In addition, in the electric range according to the present invention, by combining an air guide to the lower surface of the inverter substrate, the air guide occupying a considerable volume can be combined with the upper supporter.

[0028] In this way, most of the components involved in the operation of the electric range, such as the circuit board, blower fan, heat sink, air guide, and other components that receive electricity and operate, can be connected to the upper supporter. This structure can significantly improve the assembly and disassembly performance of the electric range.

[0029] In addition, in the electric range according to the present invention, the assembly of the heat sink and the air guide can be completed by combining the lower supporter and the upper supporter while the air guide is combined with the lower supporter and the heat sink is combined with the upper supporter.

[0030] By combining the air guide with the lower supporter, the air guide, which occupies a significant volume, can be combined with a number of substrates, heat sinks, blower fans, and other components on the lower supporter, thereby reducing the need to consider the placement space and combination structure of the air guide.

[0031] Accordingly, the spatial arrangement of components and other design aspects of electric ranges can be facilitated.

[0032] In addition to the effects described above, specific effects of the present invention are described below while explaining specific details for carrying out the invention.

[0033] Figure 1 is a perspective view showing an electric range according to an embodiment.

[0034] Figure 2 is a front view showing an electric range according to an embodiment.

[0035] Figure 3 is an exploded perspective view showing an electric range according to an embodiment.

[0036] Figure 4a is a plan view of Figure 1 with the cover plate omitted.

[0037] Figure 4b is a drawing showing a coil substrate according to one embodiment.

[0038] Figure 5 is a cross-sectional view looking in the 5-5 direction of Figure 4.

[0039] Figure 6 is a bottom view showing an electric range according to an embodiment.

[0040] Figure 7 is a drawing with the case omitted from Figure 6.

[0041] Fig. 8 is a perspective view showing an upper supporter according to one embodiment.

[0042] Figure 9 is a plan view showing an upper supporter according to one embodiment.

[0043] Figure 10 is a cross-sectional view looking in the 10-10 direction of Figure 9.

[0044] Fig. 11 is a cross-sectional view looking in the 11-11 direction of Fig. 9.

[0045] Figure 12 is an exploded perspective view showing the upper supporter and ferrite module.

[0046] Figure 13 is a plan view showing a state in which a ferrite module is combined with an upper supporter.

[0047] Fig. 14 is a plan view showing the state in which the coil substrate is combined in the state of Fig. 13.

[0048] Figure 15 is a bottom view of the upper supporter.

[0049] Fig. 16 is a drawing showing a state in which the indicator board is combined in the state of Fig. 15.

[0050] Figure 17 is a drawing showing a state in which various parts are combined in the state of Figure 16.

[0051] Fig. 18 is a plan view for explaining the arrangement of a ferrite core and a working coil according to one embodiment.

[0052] Figure 19 is an exploded perspective view of a ferrite module according to one embodiment.

[0053] Fig. 20 is a plan view of the ferrite module illustrated in Fig. 19.

[0054] Figure 21 is a side cross-sectional view of Figure 20.

[0055] Figure 22 is an exploded perspective view of a ferrite module according to another embodiment.

[0056] Fig. 23 is a plan view of the ferrite module illustrated in Fig. 22.

[0057] Figure 24 is a side cross-sectional view of Figure 23.

[0058] Figure 25 is an exploded perspective view of a ferrite module according to another embodiment.

[0059] Fig. 26 is a plan view of the ferrite module illustrated in Fig. 25.

[0060] 27 is a side cross-sectional view of Fig. 26.

[0061] Figure 28 is a drawing for explaining the distribution of a magnetic field when the lateral end of the working coil is at the same position as the lateral end of the ferrite core.

[0062] Figure 29 is a drawing for explaining the distribution of a magnetic field when the lateral end of the working coil is located inside the ferrite core rather than the lateral end of the ferrite core.

[0063] Figure 30 is a drawing for explaining the distribution of a magnetic field when the lateral end of the working coil protrudes further outward from the electric range than the lateral end of the ferrite core.

[0064] Figure 31 is a perspective view of the lower part of the upper supporter according to one embodiment.

[0065] Figure 32 is a bottom view of an upper supporter according to an embodiment.

[0066] Figure 33 is an exploded perspective view showing some of the parts that are connected to the upper supporter.

[0067] Figure 34 is an exploded perspective view of Figure 33 viewed from a different direction.

[0068] Figure 35 is a perspective view showing the lower supporter and case combined.

[0069] Figure 36 is a perspective view showing the lower supporter and case disassembled.

[0070] Fig. 37 is a bottom view of Fig. 35.

[0071] Figure 38 is a plan view of a lower supporter according to another embodiment.

[0072] Figure 39 is a perspective view of a lower supporter according to another embodiment.

[0073] Figure 40 is a plan view of a ferrite module according to an embodiment.

[0074] Fig. 41 is a cross-sectional view of Fig. 40.

[0075] Figure 42 is a perspective view of Figure 41.

[0076] Figure 43 is a plan view of a ferrite module according to another embodiment.

[0077] Figure 44 is a cross-sectional view of Figure 43.

[0078] Figure 45 is a perspective view of Figure 44.

[0079] Fig. 46 is a perspective view of a ferrite core according to another embodiment.

[0080] Figure 47 is a plan view of Figure 46.

[0081] Figure 48 is a front view of Figure 46.

[0082] Fig. 49 is a perspective view of a ferrite module according to another embodiment.

[0083] Figure 50 is a plan view of Figure 49.

[0084] Figure 51 is a cross-sectional view looking at 29-29 in Figure 50.

[0085] Figure 52 is an exploded perspective view of the upper supporter and ferrite module.

[0086] Figure 53 is a cross-sectional view of the upper supporter and ferrite module assembled.

[0087] Figure 54 is an enlarged view of part 32 of Figure 53.

[0088] Figure 55 is an exploded perspective view of some parts of an electric range with an insulating plate shown.

[0089] The above-described objects, features, and advantages will be described in detail below with reference to the accompanying drawings, so that those skilled in the art can easily practice the technical ideas of the present invention. In describing the present invention, if a detailed description of known technologies related to the present invention is judged to unnecessarily obscure the gist of the present invention, a detailed description thereof will be omitted. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to indicate the same or similar components.

[0090] Although terms like "first" and "second" are used to describe various components, these components are not limited by these terms. These terms are used merely to distinguish one component from another, and unless otherwise specified, a "first" component may also be a "second" component.

[0091] Throughout the specification, unless otherwise specifically stated, each element may be singular or plural.

[0092] As used herein, singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, terms such as "consisting of" or "comprising" should not necessarily be construed to include all of the components or steps described in the specification, and should be construed to mean that some of the components or steps may not be included, or that additional components or steps may be included.

[0093] Throughout the specification, when we refer to "A and / or B", this means A, B, or A and B, unless otherwise stated, and when we refer to "C through D", this means C or more and D or less, unless otherwise stated.

[0094] Throughout the specification, "upper," "lower," or "upper-lower" refers to the direction above, below, or up-down of the electric range when the range is installed for everyday use. "Bilateral" or "lateral" refers to the direction perpendicular to the upper-lower direction. Bilateral or lateral may include "left-right" and "front-back," where the left-right and front-back directions are perpendicular to each other.

[0095] Fig. 1 is a perspective view showing an electric range according to an embodiment. Fig. 2 is a front view showing an electric range according to an embodiment. Fig. 3 is an exploded perspective view showing an electric range according to an embodiment.

[0096] An electric range according to an embodiment can heat a heated object using induction heating. In this case, the heated object may be, for example, a dish containing a metal material such as stainless steel or iron.

[0097] The induction heating method is a method of applying high-frequency power to a working coil (140a) to generate a magnetic field around the working coil (140a), and heating a heated object made of a metal component using an eddy current generated by the generated magnetic field.

[0098] That is, when the working coil (140a) and the ferrite material are placed adjacent to each other and high-frequency power is applied to the working coil (140a), the working coil (140a) can generate a magnetic field.

[0099] In this way, when a magnetic field is generated around the working coil (140a) and a heated object is placed within the area of ​​the generated magnetic field, an eddy current is induced in the heated object by the magnetic field, and Joule's heat is generated by the eddy current, so that the heated object can be heated. As the heated object, which is the tableware, is heated, the food contained in the heated object can be heated and cooked.

[0100] An electric range of one embodiment may include a case (110), a cover plate (120), an upper supporter (130), a coil substrate (140), and a ferrite module (150).

[0101] The case (110) may function to protect components constituting the electric range. For example, the case (110) may be made of aluminum, but is not limited thereto. Meanwhile, the case (110) may be insulated to prevent heat generated by the coil substrate (140) from being released to the outside.

[0102] The case (110) can accommodate components that make up an electric range, and although the upper part is open, this open part can be closed by a cover plate (120). The case (110) can be used by processing the entire plate-shaped material into a box shape.

[0103] The case (110) may include a bottom plate (111) and a side wall (112). The bottom plate (111) may form the bottom surface of the case (110). The bottom plate (111) may support the internal components of the electric range.

[0104] The side wall (112) can be bent from the bottom plate (111) to form a space for receiving parts. The side wall (112) can be bent upward from the edge of the bottom plate (111) to form the side of the electric range.

[0105] A side wall (112) may be arranged on each side of a bottom plate (111) that is generally formed in a rectangular shape. The side wall (112) may reinforce the rigidity of the entire case (110). That is, the side wall (112) formed to be bent from the bottom plate (111) may prevent the plate-shaped bottom plate (111) from being bent or damaged by the weight of the internal components or external force.

[0106] Additionally, a cover plate (120) can be combined with the upper portion of the side wall (112). In this way, the case (110) and the cover plate (120) are combined so that the inside of the case (110) is closed, and a space in which various parts can be arranged can be provided inside the case (110).

[0107] The cover plate (120) is attached to the upper part of the case (110), and a heating element can be placed on the upper surface. The cover plate (120) can close the open upper part of the case (110) to protect the components stored in the case (110).

[0108] A heating element is placed on the upper surface of the cover plate (120), and a magnetic field generated from the coil plate and ferrite module (150) can pass through the cover plate (120) to reach the heating element. The cover plate (120) may be made of a material including, for example, ceramic, but is not limited thereto.

[0109] The cover plate (120) may be formed of, for example, a glass material and may be made transparent or translucent so that light irradiated from the indicator substrate (250) may pass through.

[0110] An input interface (160) that receives input from a user may be installed in an electric range. The input interface (160) is installed to overlap a specific area of ​​the cover plate (120) and may display a specific image.

[0111] For example, the input interface (160) may be installed flatly embedded in the cover plate (120) or in contact with the lower surface of the cover plate (120).

[0112] The input interface (160) receives a touch input from a user, and the electric range can be driven based on the received touch input.

[0113] For example, the input interface (160) is a module for inputting the heating intensity or heating time desired by the user, and can be implemented as a physical button or touch panel.

[0114] For example, the input interface (160) may be, but is not limited to, a TFT LCD (Thin Film Transistor Liquid Crystal Display).

[0115] The cover plate (120) may be provided with a cover frame (121) for coupling the upper supporter (130) and the cover plate (120). The cover plate (120) may be formed to protrude downward from the cover plate (120) at a position corresponding to the side plate (136) of the upper supporter (130) adjacent to the edge of the cover plate (120).

[0116] When the cover plate (120) is coupled to the upper supporter (130), the cover frame (121) can be arranged to surround the side plate (136) of the upper supporter (130) from the outside. A hole can be formed in the cover frame (121), and a protrusion can be formed in the upper supporter (130) at a position corresponding to the hole.

[0117] Accordingly, at a position where the side plates (136) of the cover frame (121) and the upper supporter (130) overlap each other laterally, the protrusion of the upper supporter (130) can be inserted into the hole of the cover frame (121) so that the cover plate (120) and the upper supporter (130) can be coupled to each other.

[0118] The upper supporter (130) can be accommodated in the case (110). The upper supporter (130) is accommodated inside the case (110), and various parts used for the operation of the electric range can be combined therein.

[0119] The coil substrate (140) and ferrite module (150) that form a magnetic field may be placed on the upper side of the upper supporter (130). In addition, various circuit boards used to operate the electric range and a cooling device that cools these circuit boards may be placed on the lower side of the upper supporter (130).

[0120] To accommodate such a large number of components, the upper supporter (130) may have a complex shape. Therefore, the upper supporter (130) can be easily manufactured into a complex shape, for example, by injection molding a plastic material. The specific structure of the upper supporter (130) is described in detail below.

[0121] The coil substrate (140) is arranged on the upper side of the upper supporter (130), and is provided in multiple numbers spaced apart from each other in the lateral direction, and a working coil (140a) can be printed on it.

[0122] A typical working coil (140a) is manufactured by winding the coil in a spiral shape. In the case of such a working coil (140a), the entire working coil (140a) may be enlarged to accommodate the coil winding. A large working coil (140a) reduces the spatial efficiency of the heating area of ​​the electric range and increases power consumption.

[0123] In an embodiment, a coil substrate (140) on which a working coil (140a) is printed may be used. Instead of the working coil (140a) being wound on the coil substrate (140), it may be provided in a manner in which it is printed on the coil substrate (140).

[0124] When printing a working coil (140a), the working coil (140a) can be printed densely in a small area, and can also be printed to form multiple layers in the upper and lower directions of the substrate.

[0125] Accordingly, when a working coil (140a) is printed on a coil substrate (140), the area of ​​the coil substrate (140) can be reduced and the length of the working coil (140a) can be sufficiently extended compared to the method in which the working coil (140a) is wound. Accordingly, a coil substrate (140) equipped with a working coil (140a) having a small area can be manufactured.

[0126] In addition, since the coil substrate (140) has a thin film form, the coil substrate (140) on which the working coil (140a) is provided can have a very slim form compared to the way the working coil (140a) is wound.

[0127] Therefore, in the embodiment, by using a coil substrate (140) on which a 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. Accordingly, the entire electric range can be manufactured slim.

[0128] As illustrated in Fig. 3, compared to the method in which the working coil (140a) is wound, in the embodiment, a large number of small-area coil substrates (140) can be placed on the electric range. Accordingly, a large number of working coils (140a) can be densely placed on the upper part of the electric range.

[0129] The coil substrate (140) can be arranged without gaps with adjacent coil substrates (140), compared to the way the working coil (140a) is wound. Due to this structure, a plurality of coil substrates (140) can be densely arranged in an electric range without any empty spaces.

[0130] Accordingly, the empty space where the working coil (140a) is not located in the area where the coil substrate (140) is placed can be minimized, so that a large number of heating elements can be heated simultaneously, thereby improving the space efficiency of the electric range.

[0131] In addition, since the working coil (140a) is printed on the coil substrate (140), the working coil (140a) does not necessarily have to be arranged in a circular shape, and for example, corresponding to the shape of the coil substrate (140) which is rectangular, the working coil (140a) can be printed in a spiral shape with a generally rectangular shape.

[0132] Due to the aforementioned structure, a working coil (140a) having a very long length can be provided. In addition, the working coils (140a) are densely arranged on the coil substrate (140), and each working coil (140a) can be separated from each other and operate independently.

[0133] Accordingly, only the working coils (140a) that are at least partially overlapping with the heated object may operate to form a magnetic field, and the remaining working coils (140a) may not operate. Due to this structure, the user can freely place the heated object anywhere on the cover plate (120).

[0134] Accordingly, convenience is provided to the user, and the working coil (140a) that does not overlap with the heated body does not operate, so power consumption can be significantly reduced.

[0135] The ferrite module (150) may be provided in multiple numbers, arranged on the upper side of the upper supporter (130), arranged on the lower side of the coil substrate (140), and arranged at positions corresponding to each of the multiple working coils (140a).

[0136] 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 the formed magnetic field can form an eddy current in the heated body.

[0137] Ferrite modules (150) can be arranged on the lower side of the coil substrate (140) in a number corresponding to the positions corresponding to the working coil (140a). In an exemplary embodiment, the ferrite modules (150) can be provided in an overall rectangular shape.

[0138] A ferrite module (150) can be formed by insert-molding a ferrite material and a plastic material. In this case, in one ferrite module (150), the ferrite material can be arranged in multiple pieces spaced apart from each other. The ferrite module (150) will be described in detail below.

[0139] Various boards equipped with various control elements and electric circuits for the operation of the electric range may be equipped in the electric range. These boards may be equipped 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).

[0140] The main board (170) may be equipped with a control unit that controls the electric range. The main board (170) may be equipped to receive power from an external power source and communicate with an external device via wire or wirelessly.

[0141] The EMI filter (190) can suppress electromagnetic interference generated by electricity. The EMI filter (190) can receive AC power from an external power source. In addition, the EMI filter (190) can reduce noise (i.e., EMI (Electro Magnetic Interference)) of the received AC power and provide the AC power with reduced noise to the SMPS board (180).

[0142] The SMPS substrate (180) can supply electricity to an electric range. The SMPS substrate (180) can receive AC power with reduced noise from an EMI filter (190). In addition, the SMPS substrate (180) can rectify the AC power received into DC power and provide the rectified DC power to the inverter substrate (210).

[0143] The inverter substrate (210) can apply a resonant current to the working coil (140a). The inverter substrate (210) can include an inverter unit that applies a resonant current to the working coil (140a) through a switching operation. A plurality of inverter units can be provided, and the switching operation of the inverter units can be controlled by a control unit provided on the main substrate (170).

[0144] Here, the inverter section receives direct current power from the SMPS substrate (180) and performs a switching operation based on the received direct current power, thereby applying a resonant current to the working coil (140a).

[0145] And the inverter unit may include two switching elements, and the two switching elements may be alternately turned on and off by a switching signal provided from the control unit. And, a high-frequency alternating current (i.e., resonant current) may be generated by the switching operation of these two switching elements, and the generated high-frequency alternating current may be applied to the working coil (140a).

[0146] An inverter substrate (210) according to an exemplary embodiment may include a resonant capacitor, as shown in FIGS. 3 and 7. That is, the inverter substrate (210) illustrated in FIG. 3 is a form in which the inverter portion and the resonant capacitor are integrated.

[0147] According to another embodiment, the inverter substrate (210) may be equipped with only an inverter section without a resonant capacitor, as shown in FIG. 17. In this case, a separate resonant substrate (220) equipped with a resonant capacitor may be equipped in the electric range.

[0148] Below, the resonant substrate (220) and the resonant capacitor will be described first. The resonant capacitor is electrically connected to the inverter unit, and when a resonant current is applied to the working coil (140a) by the switching operation of the inverter unit, resonance begins.

[0149] In addition, when the resonant capacitor resonates, the current flowing in the working coil (140a) connected to the resonant capacitor increases. That is, through this process, an eddy current can be induced in the heated body placed on the upper side of the working coil (140a) connected to the resonant capacitor.

[0150] A plurality of resonant capacitors may be provided. In the case of an integrated type in which the inverter unit and the resonant capacitor are all provided on the inverter substrate (210), the resonant capacitor may be placed on the inverter substrate (210) at a distance from the inverter unit.

[0151] Of course, in the case where the inverter substrate (210) and the resonant substrate (220) are separated from each other and exist separately, the resonant capacitor can be provided on the resonant substrate (220).

[0152] The indicator board (250) may be equipped with a light source. The light source may be, for example, equipped in the form of multiple LEDs arranged in a row.

[0153] The indicator board (250) lights up when the electric range is in operation, thereby informing the user of the operation of the heating element. In addition, the indicator board (250) can also inform the user of the operating status of the electric range by changing the lighting shape, color, etc. of multiple LEDs.

[0154] The electric range may include a lower supporter (260) positioned on the upper side of the bottom plate (111) of the case (110). The lower supporter (260) is positioned on the lower side of the upper supporter (130), accommodated in the case (110), positioned on the lower side of the substrates coupled to the lower surface of the upper supporter (130), and may support the upper supporter (130).

[0155] The lower supporter (260) is formed in a plate shape, and holes can be formed in the corresponding portions of the inlet hole (1112) and the discharge hole (1113) so that air can flow through the inlet hole (1112) and the discharge hole (1113) formed in the bottom plate (111) described later.

[0156] A plurality of substrates, a blower fan (230), a heat sink (240), a ferrite module (150), and a coil substrate (140) are arranged on the upper supporter (130), and the load of these components can be supported by the upper supporter (130). Since a plurality of components are connected to the upper supporter (130), the load of these components may cause the upper supporter (130) to sag downward.

[0157] Accordingly, the lower supporter (260) is placed on the lower side of the upper supporter (130) to support the upper supporter (130) in which a plurality of parts are combined, thereby preventing the upper supporter (130) from sagging downward.

[0158] When the electric range is assembled, the lower supporter (260) can be positioned at a vertical distance from the lower supporter (260) so as to support relatively large components provided on various substrates, a blower fan (230) and a heat sink (240) that are larger in volume than other components.

[0159] On the upper surface of the lower supporter (260), protrusions may protrude upwardly to support the upper supporter (130) or a component coupled to the lower surface of the upper supporter (130). Meanwhile, on the upper surface of the bottom plate (111) of the case (110), protrusions may protrude upwardly to support the lower supporter (260).

[0160] Various substrates may be placed on the upper side of the lower supporter (260). Therefore, it is necessary to electrically insulate the substrates that may come into contact with the lower supporter (260) from the bottom plate (111) of the case (110) made of a material such as aluminum to prevent leakage and electrical short circuits.

[0161] Accordingly, the lower supporter (260) is formed of an electrically insulating material and is placed between the bottom plate (111) of the case (110) and the substrates to electrically insulate the substrates from the bottom plate (111). The lower supporter (260) may be formed of, for example, an electrically insulating material such as MICA or a plastic material.

[0162] The electric range may include an insulating material (270) and a MICA sheet (280). The insulating material (270) may be placed between the upper supporter (130) and the cover plate (120) to suppress heat transfer from the heated body to the upper supporter (130).

[0163] The heat generated by the heated body can pass through the cover plate (120) and be transferred to the upper supporter (130) placed inside the electric range and various parts connected thereto.

[0164] This heat transfer heats the interior of the electric range, and especially, when transferred to various substrates, it can have a negative effect on 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 interior of the electric range is suppressed, thereby preventing the heating of internal components, thereby improving the operating performance of the electric range.

[0165] The insulation material (270) may be formed of, for example, a carbon material that has good insulation performance even when manufactured with a relatively thin thickness, but is not limited thereto.

[0166] The insulating material (270) is formed in a plate shape and may be provided in multiple pieces to cover the coil substrate (140). The insulating material (270) may be separated from each other in the horizontal direction of the electric range as a whole and formed as an integral part in the vertical direction. That is, the longitudinal direction of one insulating material (270) may be arranged parallel to the vertical direction of the electric range.

[0167] The mica sheet (280) is placed between the upper supporter (130) and the cover plate (120), and can be placed at at least one position on the upper or lower side of the insulation material (270).

[0168] In the embodiment illustrated in FIG. 3, the mica sheet (280) is placed on both the upper and lower sides of the insulation (270). In another embodiment, the mica sheet (280) may be placed on only one of the upper or lower sides of the insulation (270).

[0169] The mica sheet (280) may be provided in a shape corresponding to the insulation material (270). Accordingly, the mica sheet (280) may be separated from each other in the transverse direction of the electric range as a whole and formed as an integral part in the longitudinal direction. That is, the longitudinal direction of one insulation material (270) may be arranged parallel to the longitudinal direction of the electric range.

[0170] The mica sheet (280) is formed of mica material and, together with the insulation (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 arranged to be in contact with the insulation (270), so as to suppress damage to the insulation (270) due to impact.

[0171] In particular, since the carbon material insulation (270) is weak to impact and easily damaged, the mica sheet (280) can support the insulation (270) to prevent damage to the insulation (270), thereby increasing the durability of the insulation (270).

[0172] Meanwhile, the insulation material (270) and the mica sheet (280) are formed to be shorter than others in the area where the input interface (160) is placed so as not to cover the input interface (160), thereby avoiding the input interface (160).

[0173] Fig. 4a is a plan view of Fig. 1 with the cover plate (120) omitted. Fig. 4b is a drawing showing a coil substrate (140) according to an embodiment. Fig. 5 is a cross-sectional view looking in the 5-5 direction of Fig. 4a. Fig. 6 is a bottom view showing an electric range according to an embodiment.

[0174] Various types of boards may be equipped with elements that generate heat when the electric range is in operation.

[0175] For example, the switching elements responsible for on / off control in electric ranges generate significant heat. Therefore, these elements require forced cooling to prevent overheating, which can cause the range to shut down or malfunction.

[0176] For this purpose, the electric range may include a blower fan (230) and a heat sink (240). The blower fan (230) and the heat sink (240) may serve to cool various heated substrates and other components.

[0177] The blower fan (230) is coupled to the lower surface of the upper supporter (130) and can be positioned at a location spaced apart from the substrates. The blower fan (230) can be provided to exhaust air toward the heat sink (240). The blower fan (230) is electrically connected to the main substrate (170) and its operation can be controlled by a control unit provided on the main substrate (170).

[0178] The heat sink (240) is placed on the lower side of the upper supporter (130) and may be placed in a longitudinal direction parallel to the air discharge direction of the blower fan (230). The heat sink (240) may be coupled to the lower surface of the inverter substrate (210).

[0179] In the embodiment, the inverter substrates (210) are provided as a pair spaced apart from each other, so that the heat sinks (240) can be provided as a pair so as to be coupled to each inverter substrate (210). Corresponding to the pair of heat sinks (240), the blower fans (230) can be provided as a pair, each positioned corresponding to the pair of heat sinks (240).

[0180] A plurality of cooling fins may be formed in the heat sink (240), and an air passage may be formed inside the heat sink (240) in a direction parallel to the length thereof, through which air may pass. Accordingly, air discharged from the exhaust port of the blower fan (230) cools the heat sink (240) while passing through the outer surface of the heat sink (240) and the inner air passage, thereby effectively cooling the inverter substrate (210).

[0181] The heat sink (240) is coupled to the inverter board (210) to increase the heat dissipation area of ​​the inverter board (210) so that the inverter board (210) can be effectively cooled by air flowing through the blower fan (230).

[0182] Since the inverter board (210) is equipped with an inverter unit, which is a switching element, the inverter unit consumes a relatively large amount of power and can be heated to a higher temperature than other elements. Accordingly, the heat sink (240) can be coupled to the inverter board (210) to effectively cool the inverter unit.

[0183] Meanwhile, since the air flowing by the blower fan (230) flows through the entire lower side of the lower supporter (260), other substrates besides the inverter substrate (210) are also cooled by the forcedly flowing air, so that the entire inside of the electric range can be cooled.

[0184] As illustrated in Fig. 6, the bottom plate (111) of the case (110) may include an inlet hole (1112) and an exhaust hole (1113). The inlet hole (1112) is formed at a position corresponding to the blower fan (230), and air can be introduced from the outside.

[0185] The exhaust hole (1113) is formed at a position corresponding to the air exhaust portion of the heat sink (240), and air can be exhausted. The exhaust hole (1113) can be formed at a position adjacent to the outlet of the air flow path formed in the heat sink (240). Since the heat sink (240) and the blower fan (230) are each formed in pairs, the inlet hole (1112) and the exhaust hole (1113) can also be formed in pairs correspondingly.

[0186] The working coil (140a) may be formed in multiple layers on the coil substrate (140). For example, a sensing coil for sensing a heated object may be printed on the uppermost part of the coil substrate (140), and a plurality of working coils (140a) may be arranged in layers below it.

[0187] Figure 4b shows a cross-section of a portion of a coil substrate (140) where a working coil (140a) is positioned below a sensing coil.

[0188] In Fig. 4b, the working coil (140a) has an overall rectangular shape and is formed in a spiral shape. Due to this structure, the working coil (140a) has a shape corresponding to the rectangular mounting groove (131) and the ferrite module (150), and can be printed densely, thereby increasing the total length of the working coil (140a).

[0189] However, as another example, the working coil (140a) may be formed in a polygonal, circular, or oval shape.

[0190] As described above, a single working coil (140a) illustrated in FIG. 4b may be arranged in multiple layers, spaced apart from each other in the vertical direction of the coil substrate (140). However, for clarity, in the following, the working coils (140a) that overlap each other in the vertical direction and form multiple layers may be referred to as one identical working coil (140a).

[0191] As shown in Fig. 4b, a plurality of working coils (140a) can be arranged in the lateral direction of one coil substrate (140).

[0192] In Fig. 4b, for example, one coil substrate (140) is illustrated on which two working coils (140a) are printed in the horizontal direction and four working coils (140a) are printed in the vertical direction. However, the present invention is not limited thereto, and the size of the coil substrate (140) and the number of working coils (140a) printed on one coil substrate (140) may be changed in consideration of the shape or size of the entire electric range and the ease of assembly or disassembly.

[0193] Meanwhile, a through hole (1419) may be formed between adjacent working coils (140a) in a single coil substrate (140). A first piece (1321) of an upper supporter (130) may be fitted into this through hole (1419). As the first piece (1321) is fitted into the through hole (1419), the coil substrate (140) may be placed at a designed position. The through hole (1419) may have a shape corresponding to the first piece (1321) and the slit (1323) of the upper supporter (130).

[0194] In addition, due to 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 of the upper supporter (130) and transmit through the cover plate (120).

[0195] One working coil (140a) is positioned corresponding to one ferrite module (150) and can overlap each other in the vertical direction. That is, one working coil (140a) can be positioned corresponding to one ferrite module (150).

[0196] At this time, a coil boundary (1412) may be provided between adjacent working coils (140a). The coil boundary (1412) is arranged in a direction in which the longitudinal direction intersects the longitudinal direction of the through hole (1419), and of course, the through hole (1419) is not formed in the coil boundary (1412).

[0197] The lower surface of the coil substrate (140) is supported by the second piece (1322), and at this time, the coil boundary portion (1412) can be placed at a position corresponding to the second piece (1322) of the boundary rib (132).

[0198] In Fig. 5, the direction of air flow is indicated by an arrow. When the blower fan (230) operates, air can be drawn into the electric range from the outside through the inlet hole (1112). A portion of the drawn air passes through the outer surface of the heat sink (240) and the air passage formed within the heat sink (240), and the remainder of the drawn air can be diffused throughout the entire inside of the case (110) of the electric range.

[0199] The air forced to flow inside the case (110) can be discharged to the outside through the exhaust hole (1113). In particular, the inverter substrate (210) to which the heat sink (240) is coupled can be well cooled by the forced air flow. Accordingly, the inverter unit, which is a switching element heated to a high temperature, can be effectively cooled by the heat sink (240) and the air.

[0200] In the 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). Consequently, since the cooling devices, the blower fan (230) and the heat sink (240), are both coupled to the upper supporter (130), the case (110) may not be provided with a separate structure for coupling the blower fan (230) and the heat sink (240).

[0201] Therefore, the support structure of the electric range is simplified overall, which simplifies the structure of the electric range and reduces manufacturing costs.

[0202] In addition, since the structure in contact with the blower fan (230) and the heat sink (240) in the case (110) is omitted, assembly and disassembly of the case (110) become easier, and maintenance work of the electric range can become easier.

[0203] Fig. 7 is a drawing of Fig. 6 with the case (110) omitted. Fig. 8 is a perspective view showing an upper supporter (130) according to one embodiment. Fig. 9 is a plan view showing an upper supporter (130) according to one embodiment.

[0204] Fig. 10 is a cross-sectional view looking in the 10-10 direction of Fig. 9. Fig. 11 is a cross-sectional view looking in the 11-11 direction of Fig. 9.

[0205] The upper supporter (130) may include a flat plate (135) arranged in a direction parallel to the lateral direction of the electric range, and a side plate (136) bent downward from an 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) may support the flat plate (135) at an edge of the flat plate (135).

[0206] The upper supporter (130) may include a fixing groove (131) and a boundary rib (132).

[0207] The settling groove (131) is formed by sinking the flat plate (135), and is arranged to be aligned with each other in the horizontal and vertical directions of the upper supporter (130), and may be provided in multiple numbers in which a plurality of ferrite modules (150) are each settling. The settling groove (131) is generally formed in a rectangular shape, and therefore, the coil substrate (140) and the ferrite module (150) having a rectangular shape can be fitted into the settling groove (131).

[0208] The boundary rib (132) forms a boundary of a plurality of anchoring grooves (131), is provided to protrude from the upper surface of the upper supporter (130), and may be provided in multiple numbers.

[0209] The boundary rib (132) may include a first piece (1321) and a second piece (1322). The first piece (1321) may be arranged in a longitudinal direction laterally. The second piece (1322) may be arranged in a longitudinal direction intersecting the longitudinal direction of the first piece (1321).

[0210] Referring to Fig. 4a, the first piece (1321) may be arranged in a longitudinal direction, and the second piece (1322) may be arranged in a transverse direction. Since the first piece (1321) and the second piece (1322) are arranged in a direction in which their longitudinal directions intersect each other, the upper surface of the upper supporter (130) may be formed in a grid shape overall.

[0211] 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 a narrow and long hole. An indicator substrate (250) may be placed at a position corresponding to the position where the slit (1323) is formed in the upper supporter (130).

[0212] Accordingly, since the first piece (1321) and the slit (1323) are longitudinally aligned with the vertical direction of the upper supporter (130), the indicator substrate (250) can also be longitudinally aligned with the vertical direction of the upper supporter (130).

[0213] In the indicator board (250), a light source irradiates light in an upward direction, and the irradiated light passes through a slit (1323) and transmits through a cover plate (120) made of glass, so that a user can see the irradiated light.

[0214] The slit (1323) and the indicator substrate (250) are arranged so that their longitudinal direction is parallel to the vertical direction of the upper supporter (130) and are spaced apart from each other, so that the user can see the irradiated light that is elongated in the longitudinal direction and spaced apart from each other in the horizontal direction.

[0215] The first piece (1321) may be formed to have a relatively high height, and the second piece (1322) may be formed to have a lower height than the first piece (1321). A slit (1323) is formed in the first piece (1321), and since light passing through the slit (1323) needs to be clearly visible to the user without being diffused, the first piece (1321) may be formed to have a relatively high height so that the light does not diffuse until it passes through the upper surface of the cover plate (120).

[0216] Since the insulation material (270) and the mica sheet (280) placed on the upper side of the first piece (1321) are separated from each other at the slit (1323), the insulation material (270) and the mica sheet (280) do not cover the slit (1323), so that light passing through the slit (1323) can directly reach the cover plate (120).

[0217] The second piece (1322) is formed relatively low, and an insulating material (270) and a mica sheet (280) may be placed on the upper side of the second piece (1322). The insulating material (270) or the mica sheet (280) may be placed such that the longitudinal direction thereof is parallel to the vertical direction of the upper supporter (130).

[0218] Accordingly, the insulation material (270) and the mica sheet (280) can be arranged as a single unit in the vertical direction of the upper supporter (130) and separated from each other in the horizontal direction. The insulation material (270) and the mica sheet (280) can be separated from each other with the first piece (1321) as the boundary.

[0219] That is, a plurality of insulating materials (270) and mica sheets (280) can be separated from each other by the first piece (1321) and placed on the upper side of the second piece (1322). Accordingly, the second piece (1322) can be formed relatively low to form a space in which the insulating materials (270), mica sheets (280), and the coil boundary portion (1412) of the coil substrate (140) are placed.

[0220] The ferrite module (150) may include a ferrite core (151) and a core fixing member (152). When high-frequency power is applied to a working coil (140a) printed on a coil substrate (140), a magnetic field is formed around the working coil (140a), and the formed magnetic field can form an eddy current in a heated body. The ferrite core (151) can raise the formed magnetic field in an upward direction toward the heated body. The ferrite module (150) may include a plurality of ferrite cores (151).

[0221] The core fixing part (152) is equipped with a ferrite core (151) and can fix the ferrite core (151) to the fixing groove (131). The core fixing part (152) is coupled to the upper supporter (130), is formed by insert injection with the ferrite core (151), and can fix the ferrite core (151).

[0222] The core fixing part (152) forms the outer shape of the ferrite module (150) and may be formed in an overall rectangular shape. Meanwhile, the ferrite core (151) may be formed in a plurality of pieces and joined to the core fixing part (152) by insert injection. Accordingly, the ferrite module (150) may have an overall rectangular shape.

[0223] Meanwhile, in another embodiment, the ferrite module (150) does not have a core fixing portion (152), and the ferrite core (151) can be directly coupled to the fixing groove (131) of the upper supporter (130).

[0224] That is, the upper supporter (130) includes a plurality of mounting grooves (131) arranged to be spaced apart from each other and aligned, and the ferrite core (151) can be arranged to be mounted in the mounting grooves (131) and come into contact with the upper supporter (130).

[0225] In this way, when the ferrite core (151) is directly connected to the mounting groove (131), the ferrite core (151) can be removed, which has the advantage of reducing costs and making the electric range slimmer.

[0226] In one embodiment, a ferrite core (151) placed in one mounting groove (131) may be formed of a plurality of pieces, and each piece may be provided to be attached to the mounting groove (131). Each piece may be attached to the mounting groove (131) by, for example, an adhesive, thereby maintaining the state of being placed in the designed position.

[0227] In another embodiment, the ferrite core (151) placed in one mounting groove (131) may be formed as a single piece and provided to be attached to the mounting groove (131). For example, the ferrite core (151) provided as a single piece may be stably fixed to the mounting groove (131) by being attached using an adhesive.

[0228] Since the core fixing part (152) is not used, there is no need to divide the ferrite core (151) into multiple pieces to fix the core fixing part (152) and the ferrite core (151) to each other, so the ferrite core (151) can be manufactured as one piece.

[0229] When the ferrite core (151) is formed as a single piece, it is easier to manufacture and the manufacturing time can be reduced, thereby reducing costs, compared to when it is formed as a plurality of pieces.

[0230] Fig. 12 is an exploded perspective view showing the upper supporter (130) and the ferrite module (150). Fig. 13 is a plan view showing the state in which the ferrite module (150) is coupled to the upper supporter (130). Fig. 14 is a plan view showing the state in which the coil substrate (140) is coupled in the state of Fig. 13.

[0231] As illustrated in FIGS. 12 to 14, a ferrite module (150) can first be mounted in a mounting groove (131) formed on the upper portion of an upper supporter (130). Next, after the ferrite module (150) is mounted, a coil substrate (140) can be mounted on the upper supporter (130). In this order, the mounting of the coil substrate (140) on the upper supporter (130) can be completed.

[0232] The coil substrate (140) and the ferrite module (150) may be provided to be supported by a boundary rib (132) while placed in the mounting groove (131).

[0233] Each ferrite module (150) can be independently inserted into each mounting groove (131). When each ferrite module (150) is inserted into the mounting groove (131), the side surface of the ferrite module (150) can be stably supported by the first piece (1321) and the second piece (1322) of the boundary rib (132).

[0234] When the coil substrate (140) is placed on top of the upper supporter (130), the lower surface of the coil substrate (140) can 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) can be located on the upper surface of the second piece (1322).

[0235] A first piece (1321) of a boundary rib (132) can be fitted into a through hole (1419) of a coil substrate (140). Accordingly, the coil substrate (140) is placed at a designed position, and is supported by the first piece (1321), so that lateral movement of the upper supporter (130) can be suppressed.

[0236] A substrate joint (141) may be provided to stably mount the coil substrate (140) on the upper supporter (130). The substrate joint (141) is joined to the coil substrate (140) and may join the coil substrate (140) to the upper supporter (130). The substrate joint (141) may be formed integrally with the coil substrate (140) or may be manufactured separately and joined to the coil substrate (140).

[0237] The substrate joint portion (141) may be formed to protrude from the longitudinal end of the coil substrate (140). This protruding substrate joint portion (141) may be joined to the upper supporter (130) by a joining mechanism such as a screw bolt.

[0238] A connecting pin (1411) may be provided at the edge of the coil substrate (140). When the coil substrate (140) is mounted on the upper supporter (130) by the substrate joint (141), the connecting pin (1411) comes into contact with the terminal formed on the upper supporter (130), and thus the connecting pin (1411) and the terminal of the upper supporter (130) can be electrically connected to each other.

[0239] The terminal of the upper supporter (130) can be electrically connected to other electrical components by a cable or the like.

[0240] In the embodiment, the ferrite module (150) can be easily and stably mounted on the upper supporter (130) by means of a mounting groove (131) formed on the upper portion of the upper supporter (130) and a boundary rib (132) formed surrounding the mounting groove (131).

[0241] In addition, since the first piece (1321) is fitted into the coil substrate (140), the coil substrate (140) can be placed in the designed position when mounted on the upper supporter (130), and does not move in the lateral direction of the upper supporter (130), i.e., in the horizontal and vertical directions of the upper supporter (130), so the coil substrate (140) can be easily assembled to the upper supporter (130).

[0242] The electric range may include an input interface (160) that is positioned on the upper portion of the upper supporter (130). The input interface (160) may be coupled to the upper supporter (130). To this end, the upper supporter (130) may be formed such that its upper surface is sunken downward and may include an insertion groove (134) into which the input interface (160) is inserted.

[0243] The insertion groove (134) may be provided in a generally rectangular shape to correspond to 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 facilitate input from the user's perspective.

[0244] A hole may be formed at the bottom of the insertion groove (134) through which a cable or the like can pass for electrical connection between the input interface (160) and other components.

[0245] Fig. 15 is a bottom view of the upper supporter (130). Fig. 16 is a drawing showing the state in which the indicator board (250) is combined in the state of Fig. 15. Fig. 17 is a drawing showing the state in which various parts are combined in the state of Fig. 16.

[0246] Various substrates can be joined to the lower surface of the upper supporter (130). These substrates can be joined by a joining mechanism such as a screw bolt, for example.

[0247] The main board (170) is connected to the lower surface of the upper supporter (130), and a control unit for controlling the electric range can be configured.

[0248] The SMPS substrate (180) is coupled to the lower surface of the upper supporter (130) and can supply electricity to the electric range. The SMPS substrates (180) can be provided in pairs to supply electricity to a plurality of working coils (140a).

[0249] 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 can be provided as a pair to correspond to each pair of SMPS boards (180).

[0250] The inverter substrate (210) is coupled to the lower surface of the upper supporter (130) and can apply resonant current to the working coil (140a). The inverter substrate (210) can also be provided in pairs to supply resonant current to a plurality of working coils (140a).

[0251] Meanwhile, as illustrated in Fig. 17, an electric range in which the inverter substrate (210) and the resonant substrate (220) are separated from each other may also be provided. The resonant substrate (220) is coupled to the lower surface of the upper supporter (130), is arranged separately from the inverter substrate (210), and may include a resonant capacitor.

[0252] In this way, various substrates necessary for the operation of the electric range can be provided on the lower surface of the upper supporter (130). At this time, each substrate can be placed at a position spaced apart from each other on the lower surface of the upper supporter (130).

[0253] Each substrate can be inverted and combined on the lower surface of the upper supporter (130). That is, among the components provided on each substrate, components that occupy a relatively large volume can be provided to be placed on the lower surface of the substrate.

[0254] Due to this structure, various substrates can be easily combined with the lower surface of the upper supporter (130) without any obstacles.

[0255] Meanwhile, the indicator substrate (250) is coupled to the lower surface of the upper supporter (130), is provided in multiple pieces spaced apart from each other, and may be equipped with a light source. Unlike other substrates, the indicator substrate (250) may be placed in a position partially overlapping with other substrates.

[0256] The indicator board (250) is formed in a bar shape and can be arranged so that its length is parallel to the lateral direction of the upper supporter (130).

[0257] Referring to FIGS. 15 and 16, the slits (1323) formed in the upper supporter (130) are formed so that their longitudinal direction is parallel to the vertical direction of the upper supporter (130), and can also be aligned in a vertical line. In addition, the slits (1323) can be arranged to be spaced apart from each other in the horizontal direction of the upper supporter (130).

[0258] The indicator substrate (250) may be positioned to overlap with the slit (1323) through which light passes. Accordingly, the indicator substrate (250) may be positioned to cover the slit (1323) on the lower surface of the upper supporter (130).

[0259] Accordingly, the indicator board (250) may be provided in multiple numbers so that the longitudinal direction is parallel to the vertical direction of the upper supporter (130) and is spaced apart from each other in the horizontal direction of the upper supporter (130).

[0260] Except for the indicator board (250), various boards for operating the aforementioned electric range can be spaced apart and joined to the lower surface of the board. Boards provided as a pair can also be spaced apart from each other.

[0261] In addition, a blower fan (230) constituting a cooling device may be positioned at a position spaced apart from the substrates on the lower surface of the upper supporter (130). Meanwhile, a heat sink (240) constituting a cooling device may be coupled to the upper supporter (130) in a form coupled to the lower surface of the inverter substrate (210).

[0262] In an embodiment, a ferrite module (150) and a coil substrate (140) are combined on the upper part of the supporter, and various substrates for operating an electric range and a cooling device can be combined on the lower part of the supporter.

[0263] In this way, most of the electrical components, such as the circuit board, blower fan (230), etc., that are involved in the operation of the electric range and operate by receiving electricity can be connected to the upper supporter (130). Due to this structure, the assembly and disassembly performance of the electric range can be significantly improved.

[0264] That is, when assembling an electric range, a ferrite module (150), a coil substrate (140), and an input interface (160) are first assembled on the upper side of the upper supporter (130), and various substrates and a cooling device can be assembled on the lower side of the upper supporter (130).

[0265] Next, by placing the insulation material (270) and the mica sheet (280) on the upper side of the upper supporter (130), placing the lower supporter (260) on the lower side of the upper supporter (130), and then combining the cover plate (120) and the case (110), the assembly of the electric range can be completed.

[0266] At this time, since the case (110) does not have a support structure that supports the parts that are coupled to the upper supporter (130), there is no need to fit these parts to the support structure, so assembling the case (110) can be made very easy.

[0267] Likewise, when disassembling an electric range for repair, by disassembling the case (110) and cover plate (120) and disassembling the lower supporter (260), the upper supporter (130) where various parts are combined can be accessed, and any defective parts can be easily replaced.

[0268] In addition, since the ferrite modules (150) are separated from each other and inserted into the mounting grooves (131) of the upper supporters (130), only the defective ferrite module (150) can be replaced, making it easy to perform repair work on the electric range.

[0269] Meanwhile, referring to FIGS. 15 to 17, the work of assembling various components on the lower surface of the upper supporter (130) can be performed in the following order. First, the indicator substrate (250) can be combined so as to cover the slit (1323) at the location where the slit (1323) is formed on the lower surface of the upper supporter (130).

[0270] Next, various substrates and a blower fan (230) can be placed at designed locations on the lower surface 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 substrate (210). Of course, various substrates other than the heat sink (240) and the indicator substrate (250) can be coupled to positions spaced apart from each other on the lower surface of the upper supporter (130).

[0271] Next, electrical connections between various electrical components and cable connection work for electrical connection to external power sources can be performed.

[0272] Additionally, the disassembly process can be performed in the reverse order of the assembly process described above.

[0273] Fig. 18 is a plan view for explaining the arrangement of a ferrite core (151) and a working coil (140a) according to one embodiment.

[0274] The ferrite core (151) may be configured such that a plurality of ferrite pieces are spaced apart from each other. Therefore, for the purpose of explaining the invention, the outline (FL) of the entire ferrite core (151) in which the ferrite pieces are arranged is drawn as a solid line in Fig. 18.

[0275] Meanwhile, the working coil (140a) is placed inside the coil substrate (140) and therefore cannot be seen in the plan view of the ferrite module (150). Therefore, for the purpose of explaining the invention, the outer line (WL) of the working coil (140a) is drawn as a virtual line in FIG. 18.

[0276] When alternating current is applied to the working coil (140a), a magnetic field may be generated around the working coil (140a) due to electromagnetic interaction. This magnetic field may reach the heated object and generate heat in the heated object.

[0277] The ferrite core (151) is placed below the working coil (140a) and can increase the density of the magnetic field generated by the working coil (140a). In addition, the ferrite core (151) can suppress the magnetic field from leaking to the lower side of the ferrite core (151) and allow the magnetic field to rise to the heated body located above.

[0278] That is, among the magnetic fields generated from the working coil (140a), the magnetic field transmitted to the lower side of the working coil (140a) can be blocked by the ferrite placed on the lower side of the working coil (140a) and thus can be prevented from leaking to the lower side of the ferrite.

[0279] However, since the entire ferrite core (151) is composed of multiple ferrite pieces spaced apart from each other, a small amount of magnetic field leakage may occur through the gaps between the ferrite pieces. This magnetic field leakage through the gaps is unavoidable.

[0280] However, among the magnetic fields generated at the outer periphery of the working coil (140a), the magnetic field directed downward of the working coil (140a) may leak downward of the ferrite core (151) if the ferrite core (151) does not block it. Due to this leakage, the density of the magnetic field directed toward the heated object may decrease, which may ultimately lower the thermal efficiency of the electric range.

[0281] Meanwhile, as shown in Fig. 4b, the working coil (140a) may be formed in a rectangular shape overall and in a spiral shape with an empty space formed in the center.

[0282] At this time, an eddy current may be generated at the inner edge (i.e., the end of the working coil (140a) toward the center) and the outer edge (i.e., the outer edge of the working coil (140a)) of the working coil (140a) due to the physical phenomenon of the current.

[0283] At the inner edge of the working coil (140a), a ferrite core (151) is placed on the lower side of the working coil (140a), so that the working coil (140a) and the ferrite core (151) overlap, so that the magnetic field generated by the eddy current of the ferrite core (151) can be suppressed from leaking downward from the ferrite core (151).

[0284] However, if a ferrite core (151) is not placed on the lower side of the working coil (140a) at the outer side of the working coil (140a), the downward leakage of the magnetic field generated by the normal current and eddy current flowing in the working coil (140a) cannot be suppressed.

[0285] In particular, normal current and eddy current may occur together on the outer side of the working coil (140a), so that the total amount of current may increase due to other parts of the working coil (140a), and accordingly, the size of the magnetic field may also increase. If this increased size of the magnetic field leaks downward from the ferrite core (151), the energy efficiency and heating efficiency of the electric range may decrease.

[0286] Therefore, in the embodiment, a structure is proposed that suppresses downward leakage of a magnetic field generated by current and eddy current at the outer edge of a working coil (140a).

[0287] In an embodiment, the lateral end of the working coil (140a) may be placed at the same position as or inside the lateral end of the ferrite core (151).

[0288] For example, the working coil (140a) and the ferrite core (151) may be formed with a polygonal outer shape. For example, the working coil (140a) and the ferrite core (151) may be formed in a square, pentagon, hexagon, etc.

[0289] At this time, the area formed by the outer line of the ferrite core (151) can be formed to be equal to or larger than the area formed by the outer line of the working coil (140a).

[0290] In this specification, for example, a case in which the working coil (140a) and the ferrite core (151) are square is described.

[0291] The area of ​​the square formed by the outer line (FL) of the ferrite core (151) can be formed to be equal to or larger than the area of ​​the square formed by the outer line (WL) of the working coil (140a).

[0292] That is, referring to Fig. 18, when viewed in plan view, the outer line (WL) of the working coil (140a) may be formed to be the same as or smaller than the outer line (FL) of the ferrite core (151). In addition, when viewed in plan view, the outer line (WL) of the working coil (140a) may be formed to be at the same position as the outer line (FL) of the ferrite core (151) or may be provided to be entirely included within the inner area of ​​the outer line of the ferrite core (151).

[0293] In other words, when viewed in the vertical direction of the electric range, the area where the working coil (140a) is placed can be arranged to overlap the area where the ferrite core (151) is placed.

[0294] Regarding the structure described above, each shape of the ferrite module (150) having various structures is described in detail below. First, the ferrite module (150) is described.

[0295] Fig. 19 is an exploded perspective view of a ferrite module (150) according to one embodiment. Fig. 20 is a plan view of the ferrite module (150) illustrated in Fig. 19. Fig. 21 is a side cross-sectional view of Fig. 20.

[0296] Since the working coil (140a) is arranged inside the coil substrate (140), the working coil (140a) cannot be seen when the coil substrate (140) is viewed from the outside. However, for clarity, in the drawings below Fig. 19, the coil substrate (140) is illustrated as a cross-sectional view of the layer in which the working coil (140a) is formed.

[0297] In the cross-sectional views of FIGS. 19 to 21, the outer end of the working coil (140a) is depicted as a hidden line. The actual working coil (140a) may be arranged in multiple layers in the vertical direction on the coil substrate (140).

[0298] Referring to FIG. 19, the first type of ferrite module (150) may be configured such that a plurality of ferrite cores (151) of identical shapes are arranged radially from the center of the ferrite module (150) and spaced apart from each other.

[0299] In the first type of ferrite module (150), the core fixing part (152) may be provided with a cover covering the edge of the ferrite core (151) and may include a partition wall that separates each ferrite core (151) from each other.

[0300] As described above, such a ferrite module (150) can be manufactured by insert-molding a ferrite core (151) made of ferrite material and a core fixing part (152) made of plastic material. This also applies to the second or third type ferrite module (150) described below.

[0301] Fig. 22 is an exploded perspective view of a ferrite module (150) according to another embodiment. Fig. 23 is a plan view of the ferrite module (150) illustrated in Fig. 22. Fig. 24 is a side cross-sectional view of Fig. 23.

[0302] Referring to Fig. 22, the second type of ferrite module (150) may be arranged such that multiple ferrite cores (151) having different sizes, shapes, and areas are spaced apart from each other.

[0303] In the second type of ferrite module (150), the core fixing portion (152) may include an upper support portion (1521) extending from the edge toward the ferrite core (151) and covering a portion of the upper surface of the ferrite core (151). The upper support portion (1521) may fix the ferrite module (150) to the core fixing portion (152).

[0304] Fig. 25 is an exploded perspective view of a ferrite module (150) according to another embodiment. Fig. 26 is a plan view of the ferrite module (150) illustrated in Fig. 25. Fig. 27 is a side cross-sectional view of Fig. 26.

[0305] Referring to Fig. 25, the third type of ferrite module (150) may have a ferrite core (151) that is overall similar in size, shape, and area to the second type of ferrite core (151). However, in the third type, the core fixing portion (152) is provided with a protruding support portion (1522) that protrudes from the edge toward the ferrite core (151), and this protruding support portion (1522) may be formed at a position corresponding to each ferrite core (151).

[0306] Meanwhile, in the third type, each ferrite core (151) may have a groove formed at one end into which a protruding support portion (1522) is inserted. Accordingly, the ferrite module (150) may be formed by combining the protruding support portion (1522) of the core fixing portion (152) and the groove of the ferrite core (151).

[0307] Hereinafter, the arrangement structure of the working coil (140a) and the ferrite core (151) will be specifically described with reference to FIGS. 19 to 21. The same applies to the ferrite module (150) of the type illustrated in FIGS. 22 to 27.

[0308] As described above, the ferrite module (150) is formed by insert molding and is coupled to the upper supporter (130) with a ferrite core (151), and may include a core fixing member (152) that fixes the ferrite core (151).

[0309] Referring to Fig. 21, the area of ​​the square formed by the outer line (FL) of the ferrite core (151) can be formed smaller than the area of ​​the square formed by the outer line of the core fixing part (152).

[0310] This is because the core fixing part (152) can have a side wall (112) formed on the outer surface to accommodate the ferrite core (151). Accordingly, the outer end of the ferrite core (151) can be positioned further inward of the ferrite module (150) compared to the outer surface of the core fixing part (152).

[0311] In the embodiment, the outer end of the ferrite core (151) should be arranged to protrude further outwardly than the outer line (WL) of the working coil (140a) or the outer line (WL) of the ferrite module (150), so that the outer end of the core fixing member (152) can be formed to protrude further outwardly than the outer end of the ferrite core (151) and the outer line (WL) of the working coil (140a).

[0312] In the embodiment, when a plurality of ferrite cores (151) are arranged, the width of the plurality of ferrite cores (151) may be provided to be equal to or longer than the width of the working coil (140a). A case in which the working coil (140a) and the ferrite core (151) are formed in a square shape will be specifically described.

[0313] For example, the working coil (140a) and the ferrite core (151) may be formed with a rectangular outer shape. At this time, referring to FIG. 21, the first length (L1) defined as the length between a pair of parallel outer sides of the ferrite core (151) may be provided to be equal to or longer than the second length (L2) defined as the length between a pair of parallel outer sides of the working coil (140a).

[0314] That is, the first length (L1) may be formed to be the same as the second length (L2) or longer than the second length (L2). Therefore, due to the length difference between the second length (L2) and the first length (L1) on one side of the ferrite module (150), a gap (G) may be formed between the outer line (WL) of the working coil (140a) and the outer end of the ferrite core (151). Of course, when the first length (L1) and the second length (L2) are the same, the gap (G) may be mathematically 0.

[0315] Due to this structure, the ferrite core (151) placed on the lower side of the working coil (140a) can block the magnetic field generated from the working coil (140a) and directed toward the lower side of the working coil (140a) at the outer line (WL) of the working coil (140a).

[0316] The magnetic field blocked by the ferrite core (151) rises upward and is transmitted to the heated body, and can cause current to flow in the heated body to generate Joule heat.

[0317] Below, the behavior of the magnetic field is described based on the simulation results. The figures shown in Figures 28 to 30 depict the distribution of the magnetic field generated under each simulation condition in the form of contour lines. The contents of Figures 28 and 29 relate to embodiments of the present invention.

[0318] Fig. 28 is a drawing for explaining the distribution of a magnetic field when the lateral end of the working coil (140a) is at the same position as the lateral end of the ferrite core (151). Fig. 28 is a case where the first length (L1) and the second length (L2) are the same.

[0319] As illustrated in Fig. 28, when the first length (L1) and the second length (L2) are the same, most of the magnetic field generated by the normal current and eddy current flowing on the outer surface of the working coil (140a) is prevented from leaking downward by the ferrite core (151) and can be transmitted upward to the heated body (10).

[0320] However, a portion of the magnetic field formed sideways at the outer end of the working coil (140a) may leak downward without being blocked by the ferrite core (151). However, despite this, compared to the structure illustrated in Fig. 30, magnetic field leakage at the outer end of the working coil can be effectively suppressed.

[0321] Fig. 29 is a drawing for explaining the distribution of a magnetic field when the lateral end of the working coil (140a) is located inside the ferrite core (151) relative to the lateral end of the ferrite core (151). Fig. 29 is a case where the first length (L1) is longer than the second length (L2).

[0322] As illustrated in Fig. 29, when the first length (L1) is longer than the second length (L2), the magnetic field generated by the normal current and eddy current flowing on the outer surface of the working coil (140a) is all or almost all suppressed from leaking downward by the ferrite core (151) and can be transmitted upward to the heated body (10).

[0323] The magnetic field generated on the outer side of the working coil (140a), including the magnetic field formed toward the side at the outer end of the working coil (140a), can be blocked from leaking downward by being blocked by the ferrite core (151) placed on the lower side.

[0324] Therefore, the structure illustrated in Fig. 29 can raise the magnetic field toward the heated body (10) more efficiently than the structure illustrated in Fig. 28.

[0325] Fig. 30 is a drawing for explaining the distribution of a magnetic field when the lateral end of the working coil (140a) protrudes further outward from the electric range than the lateral end of the ferrite core (151). Fig. 30 illustrates a case where the first length (L1) is shorter than the second length (L2). The content illustrated in Fig. 30 is for comparison with an embodiment of the present invention.

[0326] As illustrated in Fig. 30, when the first length (L1) is shorter than the second length (L2), the magnetic field generated by the normal current and eddy current flowing on the outer surface of the working coil (140a) is not blocked by the ferrite core (151), and thus may leak downward. In this case, compared to the cases illustrated in Figs. 29 and 30, the downward leakage of the magnetic field may be severe, which may lower the energy efficiency and heating efficiency of the electric range.

[0327] In an embodiment, the first length (L1) of the ferrite core (151) may be formed to be equal to or longer than the second length (L2) of the working coil (140a). Accordingly, the ferrite core (151) can block the magnetic field generated from the working coil (140a) and directed downward, thereby directing it back toward the heated body, thereby improving the magnetic field density transmitted to the heated body.

[0328] Therefore, the magnetic field can be efficiently transmitted to the heated object, thereby improving the energy efficiency and heating efficiency of the electric range.

[0329] Fig. 31 is a perspective view of the lower portion of an upper supporter (130) according to one embodiment. Fig. 32 is a bottom view of an upper supporter (130) according to one embodiment.

[0330] The electric range of the embodiment may include an inverter board (210), a blower fan (230), a heat sink (240), an air guide (310), and a lower supporter (260).

[0331] The inverter substrate (210) is coupled to the lower surface of the upper supporter (130) and can apply a resonant current to the working coil (140a). The blower fan (230) can be coupled to the lower surface of the upper supporter (130). The heat sink (240) can be coupled to the lower surface of the inverter substrate (210) and can be arranged in a direction in which the longitudinal direction is parallel to the air discharge direction of the blower fan (230).

[0332] The air guide (310) is arranged to surround the heat sink (240) and can guide the flow of air passing through the heat sink (240). The lower supporter (260) is arranged below the upper supporter (130), is accommodated in the case (110), and can support the upper supporter (130).

[0333] Other components are as described above, and the air guide (310) will be described in more detail below. The air guide (310) guides the flow of air discharged from the blower fan (230), and a heat sink (240) may be arranged on the inside.

[0334] The air guide (310) surrounds the heat sink (240) and effectively cools the heat sink (240) by allowing air to flow inside and around the heat sink (240), so that the substrate to which the heat sink (240) is coupled can be effectively prevented from overheating.

[0335] Fig. 33 is an exploded perspective view showing some of the components that are connected to the upper supporter (130). Fig. 34 is an exploded perspective view of Fig. 33 viewed from a different direction. The air guide (310) may include an air introduction hole (311), a side guide (312), a lower guide (313), an air discharge hole (314), and a discharge guide (315).

[0336] The air introduction hole (311) may be arranged to face the outlet of the blower fan (230). One end of the air guide (310) where the air introduction hole (311) is formed may be coupled to the end where the outlet of the blower fan (230) is formed. Accordingly, air discharged from the blower fan (230) may flow into the interior of the air guide (310) and the heat sink (240) through the air introduction hole (311).

[0337] The side guides (312) cover the side surfaces of the heat sink (240) and may be provided as a pair spaced apart from each other. The lower guides (313) cover the lower surface of the heat sink (240) and may be connected to a pair of side guides (312), respectively.

[0338] The side guide (312) and the lower guide (313) are formed as one piece to accommodate the heat sink (240) and form a flow path for air flowing through the heat sink (240). A hole may be formed in the side guide (312) to which a connecting device such as a screw is fastened in order to connect with the heat sink (240).

[0339] The longitudinal direction of the side guide (312) and the lower guide (313) can be arranged parallel to the longitudinal direction of the heat sink (240). Accordingly, the heat sink (240) can be accommodated in the internal space formed by the side guide (312) and the lower guide (313).

[0340] The air discharge hole (314) may be provided to discharge air toward the bottom plate (111) of the case (110). The air discharge hole (314) may be positioned corresponding to the air discharge port (262) of the lower supporter (260). The air discharged from the air discharge hole (314) may be discharged to the outside of the electric range through the air discharge port (262) and the discharge hole (1113) formed in the bottom plate (111) of the case (110) disposed on the lower side of the lower supporter (260).

[0341] The discharge direction in the air discharge hole (314) may be formed toward the downward direction of the electric range. The air flows in the lateral direction of the electric range inside the air guide (310), and the flow direction may be changed to the downward direction in the air discharge hole (314). To change the flow direction of the air, the air guide (310) may include a discharge guide (315).

[0342] The discharge guide (315) forms an air discharge hole (314) and can change the direction of air flow. That is, the discharge guide (315) can change the horizontal flow of air in the electric range to the downward flow of the electric range.

[0343] The discharge guide (315) may include an extension guide (3151) and a flow change guide (3152). The extension guide (3151) may extend from a pair of side guides (312) and may be provided as a pair. The extension guide (3151) may form an air discharge hole (314) together with the flow change guide (3152).

[0344] Accordingly, in order to have a position for the air discharge hole (314) to be arranged in a position corresponding to the air discharge port (262) of the lower supporter (260), the extension guide (3151) may be formed to be bent in at least a portion.

[0345] The flow change guide (3152) is connected to a pair of extension guides (3151) and is formed into a curved surface so that the flow direction of air discharged to the outside from the air guide (310) can be changed to a downward direction.

[0346] When looking at the air guide (310) from the front of the electric range, the flow change guide (3152) can form a curved surface that gradually faces forward and then downward. Accordingly, the air directed toward the front of the air guide (310) can be guided in its flow direction by the flow change guide (3152).

[0347] Accordingly, the flow change guide (3152) can change the air flow from the horizontal direction of the electric range, i.e., the forward direction, to the downward direction.

[0348] As illustrated in FIG. 32, an air guide (310) of one embodiment may be provided to be coupled to an inverter substrate (210). For example, it may be coupled to a heat sink (240) at a position corresponding to a heat sink (240) coupled to the lower surface of the inverter substrate (210) by a coupling mechanism. Since the inverter substrates (210) are provided in pairs and a heat sink (240) is disposed on each, the heat sinks (240) may also be provided in pairs.

[0349] Since the inverter substrate (210) has a large area compared to other substrates and is equipped with a relatively large number of heat generating elements, it is necessary to effectively suppress overheating of the inverter substrate (210).

[0350] Accordingly, in the embodiment, a heat sink (240) and an air guide (310) are arranged on the lower surface of the inverter substrate (210) so that the inverter substrate (210) can be cooled using air forcedly flown by a blower fan (230).

[0351] In an embodiment, by combining an air guide (310) with the lower surface of an inverter substrate (210), the air guide (310) occupying a considerable volume can be combined with the upper supporter (130).

[0352] In this way, the circuit board, blower fan (230), and other electrical components involved in the operation of the electric range, heat sink (240), air guide (310), and most other components that operate by receiving electricity can be combined with the upper supporter (130). Due to this structure, the assembly and disassembly performance of the electric range can be significantly improved.

[0353] Fig. 35 is a perspective view showing the lower supporter (260) and the case (110) combined. Fig. 36 is a perspective view showing the lower supporter (260) and the case (110) disassembled. Fig. 37 is a bottom view of Fig. 35.

[0354] The lower supporter (260) may include an air inlet (261) and an air outlet (262). The air inlet (261) is formed at a position corresponding to the blower fan (230), and air can be introduced therein. Since the blower fan (230) is arranged above the lower supporter (260), air introduced into the blower fan (230) can pass through the lower supporter (260) from the lower side of the lower supporter (260) and be introduced into the blower fan (230).

[0355] Accordingly, an air inlet (261) is formed in the lower supporter (260), and air can pass through the lower supporter (260) through the air inlet (261) and flow into the blower fan (230).

[0356] The air outlet (262) is formed at a position corresponding to the air discharge hole (314), and air can be discharged. The air discharged from the air discharge hole (314) of the air guide (310) can pass through the lower supporter (260) through the air outlet (262) and be discharged to the lower side of the lower supporter (260).

[0357] The case (110) may include a bottom plate (111) and a side wall (112). The bottom plate (111) forms the bottom of the case (110), and a passage for air forced by a blower fan (230) may be formed. The side wall (112) may be bent from the bottom plate (111) to form a space for receiving a component. Other details regarding the bottom plate (111) and the side wall (112) have already been described above.

[0358] The bottom plate (111) may include an inlet hole (1112) and an exhaust hole (1113). The inlet hole (1112) is formed at a position corresponding to the blower fan (230) and the air inlet (261), and air can be introduced therein. The exhaust hole (1113) is formed at a position corresponding to the air outlet (262), and air can be discharged therein. Other details regarding the inlet hole (1112) and the exhaust hole (1113) have already been described above.

[0359] Air forced by the blower fan (230) can be introduced into the electric range through the floor plate (111) and discharged therefrom. This structure enhances the aesthetic appeal of the design by preventing the user from seeing the air flow path, and effectively reduces noise generated by the air flow and the operation of the blower fan (230).

[0360] Fig. 38 is a plan view of a lower supporter (260) according to another embodiment. Fig. 39 is a perspective view of a lower supporter (260) according to another embodiment.

[0361] In another embodiment, the air guide (310) can be coupled to the lower supporter (260). Unlike the embodiment described above in which the air guide (310) is coupled to the upper supporter (130), the air guide (310) can be coupled to the lower supporter (260).

[0362] For example, the air guide (310) can be positioned at a position corresponding to the heat sink (240) in the lower supporter (260). The air guide (310) can be coupled to the upper surface of the lower supporter (260) by a coupling mechanism.

[0363] When the heat sink (240) is coupled to the upper supporter (130) and the air guide (310) is coupled to the lower supporter (260), and the upper supporter (130) and the lower supporter (260) are coupled to each other, the heat sink (240) can be accommodated in the internal space of the air guide (310).

[0364] In an example, the assembly of the heat sink (240) and the air guide (310) can be completed by combining the lower supporter (260) and the upper supporter (130) while the air guide (310) is combined with the lower supporter (260) and the heat sink (240) is combined with the upper supporter (130).

[0365] By combining the air guide (310) with the lower supporter (260), the air guide (310) that occupies a considerable volume can be combined with a number of substrates, heat sinks (240), blower fans (230), and other components in the lower supporter (260), thereby reducing the need to consider the arrangement space and combination structure of the air guide (310).

[0366] Accordingly, the spatial arrangement of components and other design aspects of electric ranges can be facilitated.

[0367] Fig. 40 is a plan view of a ferrite module (150) according to one embodiment. Fig. 41 is a cross-sectional view of Fig. 40. Fig. 42 is a perspective view of Fig. 41. The ferrite module (150) illustrated in Fig. 40 may include a type 1 ferrite core (151). The type 1 ferrite core (151) and the corresponding core fixing portion (152) will be described in detail.

[0368] The first type ferrite core (151) may include a first ferrite (1511) and a second ferrite (1512). The first ferrite (1511) may be provided in multiple numbers, each arranged at a corner of a core fixing part (152) having a rectangular shape. The second ferrite (1512) may be provided in multiple numbers, at least one of which is arranged between a plurality of first ferrites (1511).

[0369] The first ferrite (1511) is generally formed in a plate shape with a predetermined thickness and may have an overall rectangular parallelepiped shape. The second ferrite (1512) may be provided in the form of a rod-shaped hexahedron having the same or similar thickness as the first ferrite (1511) and a smaller volume than the first ferrite (1511).

[0370] Additionally, 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. At this time, the length of the long side of the second ferrite (1512) may be formed to correspond to the length of one side of the first ferrite (1511).

[0371] However, the shapes of the first ferrite (1511) and the second ferrite (1512) are not limited thereto and may be formed into various other shapes. In addition, in the embodiment, two types of ferrites having different shapes are provided in one ferrite module (150), but this is not limited thereto and three or more types of ferrites having different shapes may be provided in one ferrite module (150).

[0372] In an embodiment, a ferrite core (151) may be formed by placing a plurality of ferrites having the same or different shapes and insert-molding them with a core fixing part (152) to form a ferrite module (150). Due to insert-molding, the specific shape of the core fixing part (152) that supports and fixes the ferrite core (151) is diverse, and structures of these diverse core fixing parts (152) can be easily formed.

[0373] Accordingly, by combining ferrites of various sizes and shapes, it is possible to easily manufacture a shape that corresponds to the overall mounting groove (131) of the upper supporter (130), so that the productivity of the ferrite module (150) can be improved.

[0374] The second ferrite (1512) may be arranged between a plurality of first ferrites (1511) so as to be spaced apart from the first ferrite (1511). Due to this structure, the first ferrite (1511) and the second ferrite (1512) may have a generally rectangular shape when the outer line is taken into consideration.

[0375] For example, as described above, the working coil (140a) may have an overall rectangular shape when considering the outer line. Accordingly, the ferrite core (151) is formed by combining the first ferrite (1511) and the second ferrite (1512) to have an overall rectangular shape, thereby being able to correspond in shape to the rectangular-shaped working coil (140a).

[0376] Accordingly, the generation efficiency of the magnetic field in the working coil (140a) and the ferrite core (151) can be improved. That is, as the ratio of the overlapping of the working coil (140a) and the ferrite core (151) increases, the intensity of the generated magnetic field increases. In the embodiment, since the shapes of the outer lines of the working coil (140a) and the ferrite core (151) correspond to each other as squares, the generation efficiency of the magnetic field can be improved compared to cases where the shapes of the outer lines are different.

[0377] The second ferrite (1512) may be arranged in multiple portions between a plurality of first ferrites (1511), and the plurality of second ferrites (1512) may be arranged spaced apart from each other.

[0378] In the case where the ferrite module (150) has an overall rectangular shape, the horizontal and vertical lengths of the ferrite module (150) may be different. In this case, the first ferrite (1511) and the second ferrite (1512) need to be arranged so that the overall shape of the ferrite core (151) has a rectangular shape.

[0379] In the embodiment, if a square first ferrite (1511) is placed at the corner of the core fixing part (152), as shown in FIG. 40, since the ferrite module (150) is a rectangle with a horizontal side longer than a vertical side, a considerable space (SS) can be formed between the first ferrite (1511) at the horizontal side.

[0380] In this separation space (SS), a plurality of second ferrites (1512), for example, two, are arranged to be spaced apart from each other, so that the outer line of the ferrite core (151) can have a generally rectangular shape.

[0381] In the first type, the core fixing part (152) may include a bottom plate (1521), a bending part (1522), and a first extension part (1523). The bottom plate (1521) may form the lower part of the core fixing part (152) and close the lower part of the core fixing part (152). The lower surfaces of the first ferrite (1511) and the second ferrite (1512) may be stably supported by the bottom plate (1521).

[0382] The bending portion (1522) can be bent at an end of the bottom plate (1521). The bending portion (1522) can extend upward from the bottom plate (1521) to form a space in which the first ferrite (1511) and the second ferrite (1512) are arranged.

[0383] The first extension portion (1523) is bent and extended from the bend portion (1522) and can cover a portion of the upper surface of the first ferrite (1511) and the second ferrite (1512). The first extension portion (1523) can be formed along a side forming the outer edge of the core fixing portion (152) from the upper portion of the core fixing portion (152).

[0384] The first extension (1523) may cover a portion of the upper surface of the first ferrite (1511) and the second ferrite (1512), thereby serving to fix the first ferrite (1511) and the second ferrite (1512) so that they do not come off from the core fixing portion (152).

[0385] The first ferrite (1511) may be provided to have a larger area than the second ferrite (1512). Since the second ferrite (1512) has a rectangular shape and a smaller area than the first ferrite (1511), the second ferrite (1512) may be arranged in an appropriate number at appropriate positions between the first ferrites (1511), so that the entire ferrite core (151) may have a shape corresponding to the shape of the rectangular working coil (140a).

[0386] The core fixing part (152) corresponding to the first type ferrite core (151) may include a fixing wall (1525) to stably fix the first ferrite (1511) and the second ferrite (1512) so that they do not deviate from the designed position.

[0387] The fixed wall (1525) is formed to protrude from the bottom plate (1521), is disposed between the first ferrite (1511) and the second ferrite (1512), and can be disposed to surround at least a portion of the edges of the first ferrite (1511) and the second ferrite (1512).

[0388] The fixed wall (1525) can be formed to contact at least a portion of the side surfaces of the first ferrite (1511) and the second ferrite (1512) to fix the positions of the respective ferrites and to couple them to the core fixing member (152). The fixed wall (1525) can be formed to contact the side surfaces of the ferrites and not to cover the upper surfaces of the ferrites.

[0389] Meanwhile, the upper surface of the fixed wall (1525) may be formed higher than the upper surface of the ferrites. In addition, the upper surface of the first extension portion (1523) may also be formed higher than the upper surface of the ferrites.

[0390] Due to this structure, an insulating space (TT) can be formed in the ferrite module (150) by the height difference between the upper surface of the ferrites and the upper surface of the fixed wall (1525) and the first extension (1523) at the portion where the upper surface of the ferrites is exposed.

[0391] This insulating space (TT) can serve to electrically insulate the ferrite core (151) and the coil substrate (140) from direct contact with each other. When the ferrite module (150) and the coil substrate (140) are assembled, a first extension (1523) and the insulating space (TT) are arranged between the ferrite core (151) and the coil substrate (140), and they may not directly contact each other.

[0392] Accordingly, the first extension (1523) and the insulating space (TT) electrically insulate the ferrite core (151) and the coil substrate (140), so that the reduction in magnetic field generation efficiency due to direct contact between them can be suppressed.

[0393] The core fixing member (152) may be provided with a fastening projection (1528). The fastening projection (1528) may be used to fix the ferrite module (150) to the upper supporter (130) while it is fixedly fastened to the fixing groove (131).

[0394] The core fixing member (152) may include a fastening projection (1528) that protrudes from the outer surface of the bending portion (1522) and is fastened to the upper supporter (130). The fastening projection (1528) may, for example, protrude from the outer surface of a pair of bending portions (1522) positioned facing each other, and may also be provided in multiple numbers on one bending portion (1522).

[0395] A hole or groove can be formed in the wall forming the fixing groove (131) in the upper supporter (130) in which a fastening projection (1528) is fitted, with a shape and number corresponding to the position corresponding to the fastening projection (1528).

[0396] The fastening projection (1528) can be fitted into a hole or groove formed in the upper supporter (130) by a form-fitting or force-fitting method. Accordingly, the ferrite module (150) including the core fixing member (152) can be easily attached to and detached from the upper supporter (130).

[0397] Fig. 43 is a plan view of a ferrite module (150) according to another embodiment. Fig. 44 is a cross-sectional view of Fig. 43. Fig. 45 is a perspective view of Fig. 44. The ferrite module (150) illustrated in Fig. 43 may include a second type ferrite. The second type ferrite core (151) and the corresponding core fixing part (152) will be described in detail. In the following, any description that overlaps with the above-described content may be omitted.

[0398] In the case of Type 2, a plurality of ferrite cores (151) having identical or similar shapes may be provided. The plurality of ferrite cores (151) may be arranged radially and spaced apart from each other based on the center of the core fixing part (152).

[0399] A ferrite module (150) equipped with a type 2 ferrite core (151) can be formed in a generally square shape. Accordingly, the shape of the edge of the mounting groove (131) in which the ferrite module (150) is mounted can also be formed in a generally square shape.

[0400] The ferrite core (151) is provided in multiple pieces, and each ferrite core (151) may be arranged radially to form one entire ferrite core (151). Hereinafter, the ferrite core (151) may refer to each of the multiple pieces.

[0401] In the case of Type 2, the ferrite cores (151) may be provided in identical or extremely similar shapes. Since the identical ferrite cores (151) are arranged spaced apart from each other based on the center of the core fixing part (152), the ferrite cores (151) may be arranged in a radial shape that is symmetrical in both the horizontal and vertical directions.

[0402] The ferrite core (151) may be formed in a polygonal shape. In one embodiment, the ferrite core (151) may be formed in a rectangular shape, and more specifically, may be formed in a square shape.

[0403] In another embodiment, the ferrite core (151) may be formed in a triangular shape, and more specifically, may be formed in an equilateral triangle shape. The coil substrate (140) may be formed in a polygonal shape, and for example, when the coil substrate (140) has a pentagonal or hexagonal shape, the ferrite core (151) may be formed in a triangular shape.

[0404] The second type ferrite core (151) can be formed in either the first type in which a portion of the upper surface is provided to cover the core fixing portion (152), or the second type in which at least one corner is formed and includes an inclined portion (1514) for fixing to the core fixing portion (152).

[0405] As illustrated in Fig. 43, in the case of the first type, the core fixing member (152) may include a bottom plate (1521) and a bent portion (1522) bent at an end of the bottom plate (1521). The bottom plate (1521) and the bent portion (1522) are as described above.

[0406] In the case of the first type, the core fixing portion (152) may include a second extension portion (1524), a cover portion (1526), ​​and a first separation wall (1527). The second extension portion (1524) may be bent and extended from the bend portion (1522) and may cover a portion of the upper surface of the ferrite core (151).

[0407] The second extension (1524) may be formed along the edge forming the outer edge of the core fixing portion (152) from the upper portion of the core fixing portion (152). The second extension (1524) may cover a portion of the upper surface of each ferrite core (151) and serve to fix the ferrite core (151) so that it does not come off from the core fixing portion (152).

[0408] The cover portion (1526) is formed at the center of the core fixing portion (152) and can cover a portion of the upper surface of the corner portion of the ferrite core (151). The cover portion (1526), ​​together with the second extension portion (1524), can serve to fix the ferrite core (151) so that it does not come off from the core fixing portion (152).

[0409] The cover part (1526) can fix the corner part of the ferrite core (151) to stably and firmly connect the ferrite core (151) to the core fixing part (152).

[0410] The first separation wall (1527) protrudes from the floor plate (1521), connects the bending portion (1522) and the cover portion (1526), ​​and is arranged between a plurality of ferrite cores (151) to separate them from each other.

[0411] Fig. 46 is a perspective view of a ferrite core (151) according to another embodiment. Fig. 47 is a plan view of Fig. 46. Fig. 48 is a front view of Fig. 46. The ferrite module (150) illustrated in Fig. 46 may include a second type ferrite core (151). The second type ferrite core (151) and the corresponding core fixing part (152) will be described in detail.

[0412] As shown in Fig. 46, in the case of the second type, the ferrite core (151) is formed in a square shape and is similar in appearance to the ferrite core (151) of the first type except for the inclined portion (1514) and the chamfered portion (1515).

[0413] The inclined portion (1514) may be provided as a pair, each formed at a corner corresponding to a diagonal position of the ferrite core (151). A portion of the core fixing portion (152) is covered by the inclined portion (1514), and thus the ferrite core (151) may be fixed to the core fixing portion (152).

[0414] In insert injection, a plastic material injection molding material is introduced into the upper side of the inclined portion (1514) and hardened to form a first cover (1529) and a second cover (1531) described later, and accordingly, the ferrite core (151) can be stably coupled and fixed to the core fixing portion (152) by the first cover (1529) and the second cover (1531).

[0415] A chamfered portion (1515) may be formed at the corner where multiple ferrite cores (151) face each other in the ferrite core (151). The chamfered portion (1515) may be formed at the corner where the inclined portion (1514) is formed.

[0416] Accordingly, when a plurality of ferrite cores (151) are arranged, a diamond-shaped space can be formed in the center of the entire ferrite core (151), as shown in FIG. 47.

[0417] By stacking an injection molded product integrally formed with the base plate (1521) in a rhombus-shaped space through insert injection, the ferrite core (151) can be firmly supported. This injection molded product can be connected to the second cover (1531) described later.

[0418] Fig. 49 is a perspective view of a ferrite module (150) according to another embodiment. Fig. 50 is a plan view of Fig. 49. Fig. 51 is a cross-sectional view taken along line 51-51 in Fig. 50.

[0419] As illustrated in Fig. 49, in the second type, the core fixing member (152) may include a bottom plate (1521) and a bent portion (1522) bent at an end of the bottom plate (1521). The bottom plate (1521) and the bent portion (1522) are as described above.

[0420] The core fixing part (152) corresponding to the second type ferrite core (151) may include a first cover (1529), a second cover (1531), and a second separating wall (1532).

[0421] The first cover (1529) is formed at the corner of the core fixing part (152) and is provided to cover the inclined part (1514), and can fix the ferrite core (151). The second cover (1531) is formed at the center of the core fixing part (152), and is provided to cover the inclined part (1514) where the chamfered part (1515) is formed, and can fix the ferrite core (151).

[0422] The first cover (1529) and the second cover (1531) are placed at the ends of the ferrite core (151) in the diagonal direction of the ferrite core (151), and each fixes a corner portion of the ferrite core (151), thereby stably and firmly connecting the ferrite core (151) to the core fixing portion (152).

[0423] A sloped portion (1514) may be formed on the ferrite core (151) at a position corresponding to the first cover (1529) and the second cover (1531). By having the first cover (1529) and the second cover (1531) cover the sloped portion (1514) and connect 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) can have a generally flat shape.

[0424] Since the upper surface of the ferrite module (150) is provided flat, the coil substrate (140) can be easily and stably placed on the upper side of the ferrite module (150).

[0425] The second separation wall (1532) protrudes from the floor plate (1521), connects the bending portion (1522) and the second cover (1531), and is arranged between a plurality of ferrite cores (151) to separate them from each other.

[0426] The second separation wall (1532) formed between each ferrite core (151) can contact the side surface of each ferrite core (151) to more firmly connect them to the core fixing part (152). In addition, the second separation wall (1532) can restrict each ferrite core (151) from moving laterally with respect to the core fixing part (152). As a result, the separation wall can maintain the ferrite cores (151) in their respective designed positions and suppress displacement.

[0427] Fig. 52 is an exploded perspective view of the upper supporter (130) and the ferrite module (150). Fig. 53 is a cross-sectional view of the upper supporter (130) and the ferrite module (150) in an assembled state. Fig. 54 is an enlarged view of part 32 of Fig. 53.

[0428] The core fixing part (152) may be formed in a square shape. The core fixing part (152) may include a fitting projection (1533) that protrudes from a bending portion (1522) at an edge of the core fixing part (152) to the outside of the core fixing part (152) and is fitted into the upper supporter (130).

[0429] The upper supporter (130) may include a plurality of mounting grooves (131) in which each of a plurality of ferrite modules (150) is mounted.

[0430] The insertion protrusion (1533) may be provided to stably mount the ferrite module (150) in the mounting groove (131) and to prevent the ferrite module (150) from being displaced or removed from the mounting groove (131) due to external impact.

[0431] The insertion protrusions (1533) are arranged at each corner of the square-shaped core fixing part (152), so that, for example, a total of four insertion protrusions may be provided. The insertion protrusions (1533) may be formed on the core fixing part (152) of all of the embodiments described above.

[0432] The upper supporter (130) may have a fitting groove (137) formed at 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 portion of the upper supporter (130) being sunken into a corner portion of a mounting groove (131) having a rectangular border.

[0433] The insertion projection (1533) and the insertion groove (137) can be coupled to each other in a shape-fitting manner. When the insertion projection (1533) is coupled to the insertion groove (137), the core fixing member (152) can be effectively restricted from rotation or lateral movement, and can be maintained in the designed position.

[0434] Accordingly, even if an external shock is applied to the electric range, the ferrite module (150) does not easily move out of position due to the external shock, so the assembly and performance of the electric range can be improved.

[0435] A separation space (SS) can be formed between the bottom surface of the anchoring groove (131) and the lower surface of the ferrite module (150). This separation space (SS) can be implemented by designing the structure of the insertion projection (1533) as follows.

[0436] That is, referring to FIG. 54, the first distance (L1) from the lower surface of the insertion projection (1533) to the lower surface of the ferrite module (150) can be formed to be smaller than the second distance (L2) from the lower surface of the insertion groove (137) to the bottom surface of the mounting groove (131).

[0437] Accordingly, the bottom surface of the mounting groove (131) and the lower surface of the ferrite module (150) do not contact each other, and a separation space (SS) can be formed between them. The separation space (SS) can improve the assembly efficiency when the ferrite module (150) is inserted into the mounting groove (131).

[0438] The lower surfaces of the plurality of ferrite modules (150) and the bottom surfaces of the plurality of mounting grooves (131) may not be positioned at the same height, and also, a portion of the surface may be uneven. This is because there is an error in the processing of the ferrite modules (150) and the mounting grooves (131).

[0439] If the bottom surface of the mounting groove (131) and the lower surface of the ferrite module (150) come into contact with each other, the ferrite module (150) may tilt with respect to the mounting groove (131) due to the processing error described above, or the heights of multiple ferrite modules (150) assembled in the mounting groove (131) may differ from each other. This may result in assembly failure and reduced performance of the electric range.

[0440] Accordingly, by forming a gap (SS) between the lower surface of the ferrite module (150) and the bottom surface of the mounting groove (131), the ferrite module (150) is assembled so that they do not come into contact with each other, thereby suppressing the occurrence of tilting of the ferrite module (150) due to contact, and making it possible to make the heights of the plurality of ferrite modules (150) assembled in the mounting groove (131) uniform. Accordingly, assembly failure and performance degradation of the electric range can be suppressed.

[0441] For example, the gap space (SS) can be provided at approximately 0.5 mm in the vertical direction of the electric range.

[0442] Figure 55 is an exploded perspective view of some parts of an electric range, showing an insulating plate (310).

[0443] As described above, in a ferrite module (150) having a second type ferrite core (151), the first cover (1529) and the second cover (1531) cover the inclined portion (1514) so ​​that the height of the ferrite core (151) and the height of the core fixing portion (152) are similar, so that the upper surface of the ferrite module (150) can have a generally flat shape.

[0444] Therefore, in other embodiments, it is difficult to implement a structure in which an insulating space (TT) is formed by forming the height of the upper surface of the core fixing portion (152) higher than the height of the upper surface of the ferrite core (151) in the second type.

[0445] For this reason, the ferrite module (150) equipped with the second type ferrite core (151) may not form an insulating space (TT) as in other embodiments. Since there is no insulating space (TT), the ferrite core (151) and the coil substrate (140) may come into contact with each other, which may lower the magnetic field generation efficiency.

[0446] In the embodiment, an insulating plate (310) may be provided for insulation between the ferrite core (151) and the coil substrate (140) in the second type. The electric range may include an insulating plate (310) disposed between the coil substrate (140) and the ferrite module (150) and formed of an electrically insulating material.

[0447] The insulating plate (310) may be made of, for example, polyimide, silicone, MICA, or a material including at least a portion of these, but is not limited thereto.

[0448] For example, the thickness of the insulating plate (310) may be set to approximately 0.5 mm in the vertical direction of the electric range.

[0449] In an embodiment, an insulating plate (310) is placed between the coil substrate (140) and the ferrite module (150) to electrically insulate them, thereby preventing the coil substrate (140) and the ferrite core (151) from being electrically connected and reducing the magnetic field generation efficiency.

[0450] Additionally, the upper and lower surfaces of the insulating plate (310) can contact the coil substrate (140) and the ferrite module (150), respectively. Due to this structure, the coil substrate (140) can be effectively cooled.

[0451] When electricity is applied to the coil substrate (140) and the coil substrate (140) operates, the coil substrate (140) may be heated due to the current. At this time, the heat generated in the coil substrate (140) may be transferred to the relatively cool ferrite module (150) through conduction by the insulating plate (310).

[0452] Accordingly, the insulating plate (310) can effectively cool the coil substrate (140) by acting as a heat transfer medium through conduction, and can suppress the performance degradation of the electric range due to overheating of the coil substrate (140).

[0453] Although the present invention has been described with reference to the drawings exemplified above, it is to be understood that the present invention is not limited to the embodiments and drawings disclosed in this specification, and that various modifications may be made by those skilled in the art within the scope of the technical idea of ​​the present invention. Furthermore, even if the operational effects according to the configuration of the present invention have not been explicitly described while describing the embodiments of the present invention, it is natural that the effects predictable by the corresponding configuration should also be acknowledged.

Claims

1. Case; An upper supporter accommodated in the above case; A coil substrate having a plurality of coils arranged on the upper side of the upper supporter and spaced apart from each other, and on which a working coil is printed; and A plurality of ferrite modules arranged on the upper side of the upper supporter, arranged on the lower side of the coil substrate, and arranged at positions corresponding to each of the plurality of coil substrates. Including, The above ferrite module includes a plurality of ferrite cores, The lateral end of the above working coil is arranged at the same position as or inside the lateral end of the above ferrite core. Electric range.

2. In paragraph 1, The above working coil and the above ferrite core are formed with a polygonal outer shape, When the above ferrite cores are arranged in multiples, the width of the plurality of ferrite cores is provided to be equal to or longer than the width of the working coil. Electric range.

3. In paragraph 1, The above working coil and the above ferrite core are formed with a polygonal outer shape, The area formed by the outer line of the above ferrite core is equal to or larger than the area formed by the outer line of the above working coil. Electric range.

4. In paragraph 3, The above ferrite module is formed by insert injection molding with the ferrite core and is coupled to the upper supporter, and includes a core fixing part that fixes the ferrite core. The area of ​​the square formed by the outer line of the above ferrite core is formed smaller than the area of ​​the square formed by the outer line of the above core fixing part. Electric range.

5. In paragraph 1, The upper supporter includes a plurality of fixing grooves arranged to be spaced apart from each other and aligned, The above ferrite core is positioned so as to be seated in the above seating groove and come into contact with the upper supporter. Electric range.

6. In paragraph 5, The ferrite core disposed in one of the above-mentioned mounting grooves is formed of a plurality of pieces, and each of the pieces is provided to be attached to the above-mentioned mounting groove. Electric range.

7. In paragraph 5, The ferrite core placed in one of the above-mentioned mounting grooves is formed as a single piece and is provided to be attached to the above-mentioned mounting groove. Electric range.

8. In paragraph 1, The above ferrite module, It is combined with the above supporter, and includes a core fixing part formed by insert injection with the above ferrite core and fixing the above ferrite core. The above ferrite core, Type 1, which is formed by combining ferrites with different areas, or A plurality of ferrites of the same shape are formed in one of the second types in a radial arrangement based on the center of the ferrite module. Electric range.

9. In paragraph 8, In the case of Type 1, the ferrite core is A plurality of first ferrites each arranged at a corner of the core fixing part having a square shape; and A plurality of second ferrites, at least one of which is arranged between a plurality of first ferrites. including, Electric range.

10. In paragraph 8, For type 2, The above ferrite core, Equipped with multiple, A plurality of the above ferrite cores are arranged radially and spaced apart from each other based on the center of the core fixing part, The above ferrite core, A first type in which a portion of the upper surface is provided to cover the core fixing portion, or Formed in the form of any one of the second types including at least one formed at a corner and a sloped portion for fixing to the core fixing member, Electric range.

11. In paragraph 10, In the above ferrite core, A chamfer is formed at the corners where the plurality of above ferrite cores face each other, The above chamfered portion is formed at the corner where the above inclined portion is formed. Electric range.

12. Case; An upper supporter accommodated in the above case; A coil substrate having a plurality of coils arranged on the upper side of the upper supporter and spaced apart from each other, and on which a working coil is printed; and A plurality of ferrite modules arranged on the upper side of the upper supporter, arranged on the lower side of the coil substrate, and arranged at positions corresponding to each of the plurality of coil substrates; An inverter substrate that is coupled to the lower surface of the upper supporter and applies resonant current to the working coil; A blower fan coupled to the lower surface of the upper supporter; A heat sink coupled to the lower surface of the inverter substrate and arranged such that the longitudinal direction is parallel to the air discharge direction of the blower fan; and An air guide arranged to surround the heat sink and guide the flow of air passing through the heat sink. including, Electric range.

13. In paragraph 12, A lower supporter that is placed on the lower side of the upper supporter, accommodated in the case, and supports the upper supporter. including, Electric range.

14. In paragraph 13, The above air guide is, An air introduction hole arranged to face the outlet of the above blower fan; A pair of side guides spaced apart from each other, covering the sides of the above heat sink; A lower guide covering the lower surface of the above heat sink and connected to a pair of the above side guides respectively; An air discharge hole for discharging air toward the bottom plate of the case; and A discharge guide that forms the above air discharge hole and changes the direction of air flow including, Electric range.

15. In paragraph 14, The above discharge guide is, Extension guides extending from a pair of the above side guides and provided as a pair; and A flow changing guide connected to a pair of the above extension guides and formed into a curved surface to change the flow direction of air discharged to the outside from the air guide. including, Electric range.

16. In paragraph 15, The above air guide is, Combined with either the inverter board or the lower supporter, Electric range.

17. In paragraph 12, The above ferrite module includes a ferrite core, The lateral end of the above working coil is arranged at the same position as or inside the lateral end of the above ferrite core in the vertical direction. Electric range.

18. In paragraph 17, The above working coil and the above ferrite core are formed with a rectangular outer shape, The first length defined as the length between a pair of outer sides parallel to each other of the ferrite core is provided to be equal to or longer than the first length defined as the length between a pair of outer sides parallel to each other of the working coil. Electric range.

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