KR20210006810A - Electric range - Google Patents

Abstract

The present invention relates to a hybrid electric range capable of both heating a container by a direct heating method and an induction heating method in one heating zone. The electric range according to one embodiment of the present invention comprises: a case forming an inner space having a predetermined volume; an upper plate unit combined with an upper surface of the case to seal the inner space and made of a material having the electrical insulation and thermal conductivity; a heat insulating structure disposed in the inner space and coupled to one surface of the upper plate to form a heat insulating space; a heating element disposed inside the heat insulating space and disposed at a position corresponding to a heating zone of the upper plate and dissipating thermal energy when electric energy is supplied; and a working coil disposed outside the insulating space, disposed at a position corresponding to the heating zone of the upper plate, and forming an induced magnetic field when the electric energy is supplied.

Description

Electric range {ELECTRIC RANGE}

The present invention relates to a hybrid electric range capable of both direct heating and induction heating of a container in one heating zone.

The electric range is a device that cooks food using electric energy. The electric range is provided with a heating element that supplies thermal energy using electric energy, and a heating method of the electric range is changed according to the type of the heating element.

Typical of the heating methods applied to the electric range are direct heating and induction heating. The direct heating method is also referred to as the highlight method, and when electric energy is supplied, the container is directly heated with thermal energy generated by the heating element itself made of a material such as ceramic. Therefore, a user who wants to cook food using an electric range to which a direct heating method is applied can use containers made of various materials such as metal or glass.

The induction heating method is also referred to as the induction method, and when electric energy is supplied, the container itself is heated by inducing an eddy current into a container made of metal using a magnetic field generated around a heating element such as a working coil. . Therefore, a user who wants to cook food using an electric range to which an induction heating method is applied must use a container having a specific material capable of induction heating.

A heating zone is formed on the top plate of the electric range in which a container to be heated can be placed. However, one of a heating element for the direct heating method or a heating element for the induction heating method described above is selectively disposed below the heating region of the electric range according to the prior art. Therefore, in one heating zone, the container is heated only by either a direct heating method or an induction heating method.

Accordingly, a heating region to which a direct heating method is applied and a heating region to which an induction heating method is applied are separately provided in the conventional electric range. For this reason, a user who uses an electric range having a heating zone to which the induction heating method is applied is inconvenient to always prepare a separate container having a specific material.

In addition, according to the prior art, there is a problem that the volume of the electric range is increased by separately providing a heating region to which a direct heating method is applied and a heating region to which an induction heating method is applied.

An object of the present invention is to provide an electric range in which a user can cook food using containers having various materials without needing to distinguish between the materials of the container.

In addition, an object of the present invention is to provide an electric range having a smaller volume compared to the prior art while both direct heating and induction heating are possible.

The objects of the present invention are not limited to the above-mentioned objects, and other objects and advantages of the present invention that are not mentioned can be understood by the following description, and will be more clearly understood by examples of the present invention. In addition, it will be easily understood that the objects and advantages of the present invention can be realized by the means shown in the claims and combinations thereof.

The electric range according to an embodiment of the present invention includes a case forming an inner space having a predetermined volume, a top plate portion formed of a material having electrical insulation and thermal conductivity by being combined with an upper surface of the case to seal the inner space, and A heat insulating structure disposed in the inner space and coupled to one surface of the upper plate to form an insulating space, a heating element disposed inside the heat insulating space and disposed at a position corresponding to the heating area of the upper plate and emitting thermal energy when electric energy is supplied And a working coil disposed outside the heat insulating space, disposed at a position corresponding to the heating region of the upper plate, and forming an inductive magnetic field when electric energy is supplied.

In one embodiment of the present invention, the heat insulating structure includes a support portion attached to one surface of the upper plate portion and a cover portion coupled to one surface of the support portion to seal the heat insulating space.

In addition, in an embodiment of the present invention, the support part and the cover part are integrally formed.

In addition, in an embodiment of the present invention, the cover portion includes two or more cover portions that are spaced apart from each other at predetermined intervals.

In addition, in an embodiment of the present invention, the cover portion further includes at least one spacer disposed between the two or more cover portions.

Further, in an embodiment of the present invention, the space between the two or more cover portions is maintained in a vacuum state or filled with gas for heat insulation.

In addition, in an embodiment of the present invention, the working coil is made of a metal material and is attached or printed on the surface of the heat insulating structure in the form of a thin film.

In addition, in an embodiment of the present invention, the electric range includes a plurality of insulating substrates and a plurality of working coils alternately disposed with each other.

In addition, the electric range according to an embodiment of the present invention further includes a blowing fan disposed in the inner space.

In addition, in an embodiment of the present invention, the blowing fan is disposed on the side or the bottom of the working coil.

In addition, the electric range according to an embodiment of the present invention further includes at least one support disposed between the working coil and the case.

A user using the electric range according to the present invention has the advantage of being able to cook food using containers having various materials without having to distinguish between the materials of the containers.

In addition, the electric range according to the present invention has the advantage of having a smaller volume compared to the prior art while both direct heating and induction heating are possible.

1 is a perspective view of an electric range according to an embodiment of the present invention.
2 is an exploded perspective view of an electric range according to an embodiment of the present invention.
3 is a cross-sectional view of an electric range according to an embodiment of the present invention.
4 is a cross-sectional view of an electric range according to another embodiment of the present invention.
5 shows a plurality of working coils and magnetic sheets provided in the electric range according to an embodiment of the present invention.

The above-described objects, features, and advantages will be described later in detail with reference to the accompanying drawings, and accordingly, one of ordinary skill in the art to which the present invention pertains will be able to easily implement the technical idea of the present invention. In describing the present invention, if it is determined that a detailed description of known technologies related to the present invention may unnecessarily obscure the subject matter of the present invention, a detailed description 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 elements.

Hereinafter, the structure and function of the electric range according to the present invention will be described in detail by taking an electric range having one heating region as an example. However, the structure and function of the electric range according to the present invention can be applied equally to the electric range having two or more heating zones.

1 is a perspective view of an electric range according to an embodiment of the present invention, and FIG. 2 is an exploded perspective view of an electric range according to an embodiment of the present invention.

As shown in FIGS. 1 and 2, the electric range 1 according to an embodiment of the present invention includes a top plate 10 and a case 12 forming the exterior of the electric range 1.

The case 12 forms an inner space having a predetermined volume. Components of the electric range 1 to be described later are arranged in the inner space of the case 12. In the embodiments shown in FIGS. 1 and 2, the case 12 is shown to have a hexahedral shape with an open edge and a predetermined curvature. However, the shape of the case 12 may vary depending on the embodiment.

In addition, at least one side of the case 12 is formed with a plurality of vents 120 for discharging heat generated by components disposed in the inner space of the case 12 to the outside of the case 12. In the embodiment shown in FIGS. 1 and 2, it is shown that the ventilation hole 120 is formed only on one side of the case 12. However, the location and number of the vents 120 may vary according to embodiments.

The upper plate 10 is coupled to the open surface of the case 12, that is, the upper surface to seal the inner space of the case 12. The upper plate 10 has a flat plate shape corresponding to the upper surface of the case 12 and is made of a material (eg, glass or ceramic) having electrical insulation and thermal conductivity.

A heating zone 14 for heating the container is formed on the upper surface of the upper plate 10. In order to facilitate the identification of the heating region 14, a figure or symbol representing the heating region 14 is displayed on the upper surface of the upper plate portion 10. In the embodiment shown in FIGS. 1 and 2, the heating area 14 is indicated by a cross (+). However, depending on the embodiment, various symbols or figures such as a circle or a square may represent the heating region 14.

In addition, one or more control buttons for controlling the operation of the electric range 1 are disposed on the upper surface of the upper plate 10. The user can adjust the cooking time by touching the timer buttons 101a and 101b, and can adjust the amount of heat, that is, heat energy, applied to the container by touching the heat control buttons 101c and 101d.

In addition, the user can change the electric range 1 to a locked state or unlocked state by touching the lock button 101e. In the locked state, even if the user touches a button other than the lock button 101e, the electric range 1 does not operate. In the unlocked state, the user can control the electric range 1 by touching a button other than the lock button 101e.

In addition, the user can change the electric range 1 to an on state or an off state by touching the power button 101f.

Referring to FIG. 2, a plurality of components are disposed in an inner space of the electric range 1, that is, a space sealed by the upper plate 10 and the case 12. Hereinafter, for convenience of description, the surface on which the heating region 14 and the control button are disposed among both surfaces of the upper plate 10 is referred to as an'upper surface' and the opposite surface of the upper surface is referred to as a lower surface.

First, a planar heating element 21 is disposed on the lower surface of the upper plate 10. The planar heating element 21 is formed by sintering a conductive material (eg, metal or ceramic) into a specific shape or pattern. In one embodiment of the present invention, the planar heating element 21 has a circular shape as a whole, and the inside of the circular shape has a predetermined pattern. The overall shape or internal pattern of the planar heating element 21 may vary according to embodiments.

The planar heating element 21 is disposed at a position corresponding to the heating region 14. For example, the center of the planar heating element 21 may be disposed to coincide with the center of the heating region 14. In one embodiment of the present invention, the planar heating element 21 may be attached to the lower surface of the upper plate 10.

Although not shown in the drawings, conductors may be connected to both ends of the planar heating element 21, and electrical energy may be supplied to the planar heating element 21 through the conductors. When electric energy is supplied to the planar heating element 21, the planar heating element 21 generates thermal energy, and the container placed in the heating region 14 is heated by this heat energy.

In addition, a heat insulating structure 22 is disposed on the lower surface of the upper plate 10. The heat insulation structure 22 is combined with the lower surface of the upper plate 10 to form a closed space, that is, a heat insulation space. The planar heating element 21 is disposed inside a heat insulating space formed on the lower surface of the heat insulating structure 22 and the upper plate 10. Thermal energy generated by the planar heating element 21 is not discharged to the outside by such a thermal insulation space, but is preserved, so that more thermal energy can be supplied to the container.

In the embodiment shown in Figure 2, the heat insulating structure 22 has a cylindrical shape. However, the heat insulating structure 22 does not necessarily have a cylindrical shape, and the shape of the heat insulating structure 22 may vary according to embodiments.

Referring back to the drawings, a working coil 23 is disposed under the heat insulating structure 22. In the embodiment of FIG. 2, the working coil 23 is formed by winding a conductive wire made of a metal material several times, and has a circular shape as a whole. However, the overall shape or internal pattern of the working coil 23 may vary according to embodiments.

The working coil 23 is disposed at a position corresponding to the heating region 14. For example, the center of the working coil 23 may be arranged to coincide with the center of the heating region 14. In one embodiment of the present invention, the working coil 23 may be attached to or printed on the lower surface of the heat insulating structure 22 in the form of a thin metal material.

Although not shown in the drawing, wires may be connected to both ends of the working coil 23, and electrical energy may be supplied to the working coil 23 through the wires. When electric energy is supplied to the working coil 23, a magnetic field is formed around the working coil 23 as a current flows through the working coil 23, and an eddy current is formed in the container placed in the heating area by this magnetic field, thereby heating the container. .

A magnetic sheet 24 is disposed under the working coil 23 to prevent the magnetic field generated by the working coil 23 from being formed in a direction opposite to the container. An example of the magnetic sheet 24 may be a ferrite sheet. In Fig. 2, the diameter of the magnetic sheet 24 is larger than the diameter of the working coil 23 and is formed in a circular shape and a plate shape. However, the size and shape of the magnetic sheet 24 may vary according to exemplary embodiments.

Meanwhile, a blowing fan 25 is disposed under the magnetic sheet 24. The blowing fan 25 flows air from the bottom of the magnetic sheet 24 toward the top, that is, the working coil 23 or the planar heating element 21. When an excessive amount of heat is generated in the working coil 23 when electric energy is supplied to the working coil 23, the thermal efficiency of the working coil 23 is lowered, so it is necessary to lower the temperature of the working coil 23. In one embodiment of the present invention, heat generated in the working coil 23 by the air flowing by the blowing fan 25 may be discharged to the outside of the case 12 through the ventilation opening 120.

In the embodiment of FIG. 2, the blowing fan 25 is shown to be disposed under the working coil 23. However, in another embodiment of the present invention, the blowing fan 25 may be disposed on the side of the working coil 23. When the position of the blowing fan 25 is changed, the flow direction of the air flowing inside the case 12 by the blowing fan 25 may be changed. Accordingly, when the location of the blowing fan 25 is changed, the number or location of the ventilation holes 120 formed on the side of the case 12 may also be changed.

Referring back to FIG. 2, the main substrate 26 is disposed under the blowing fan 25. The main substrate 26 includes a power supply circuit for supplying electric energy for driving the electric range 1 and a control circuit for controlling driving of the electric range 1.

The control circuit controls the driving of the electric range 1 by controlling whether electric energy is supplied to the planar heating element 21 or the working coil 23, the amount of electric energy supplied, and the like according to the user's control.

In one embodiment of the present invention, the control circuit performs a container detection operation to determine the type of container placed in the heating region 14 using the working coil 23, and determines the heating method for the container according to the container detection result. By determining, it is possible to control the supply of electric energy to the planar heating element 21 or the working coil 23.

For example, the user changes the electric range 1 to the ON state by touching the power button 101f of the electric range 1, and then puts the container on the heating area 14, and the heat control buttons 101c, 101d ) Can be touched. When the user touches the heat control buttons 101c and 101d to set the heat for the container placed in the heating area 14, the control circuit applies a predetermined amount of current to the working coil 23, and the current is applied. At this time, the magnitude of the resonant current generated in the working coil 23 is measured.

The control circuit determines that the container placed in the heating zone 14 is a container capable of induction heating if the measured resonance current is less than a predetermined reference value, and otherwise, the container placed in the heating zone 14 is not capable of induction heating. It can be judged that it is not a courage. This is just one example, and the control circuit may determine the type of container based on the magnitude of the resonance frequency of the working coil 23 when a different value, for example, current is applied. As another example, the control circuit may determine the type of container based on the size of a magnetic field measured by a magnetic sensor disposed around the working coil 23.

As a result of the determination, when it is determined that the container placed in the heating region 14 is a container in which induction heating is not possible, the control circuit performs a heating operation on the container by supplying electric energy only to the planar heating element 21.

On the contrary, if it is determined that the container placed in the heating zone 14 is a container capable of induction heating, the control circuit may heat the container by induction heating by driving the working coil 23 according to the heating power level set by the user.

In another embodiment of the present invention, if it is determined that the container placed in the heating region 14 is a container capable of induction heating, the control circuit is either a planar heating element 21 or a working coil 23 according to a predetermined priority. First of all, you can supply electrical energy. In addition, when the user sets the heating power of the heating region 14 to a level equal to or higher than a predetermined reference level, the control circuit may supply electric energy to the planar heating element 21 and the working coil 23 at the same time.

For example, when the working coil 23 is set to have a higher priority than the planar heating element 21, and the container placed in the heating area 14 is determined to be a container capable of induction heating, the user has a predetermined reference level. When the heating power of the heating region 14 is set to two levels lower than the phosphorus 7 level, the control circuit can supply electric energy only to the working coil 23. Accordingly, the container placed in the heating zone 14 is heated by induction heating, and thermal energy corresponding to the second level is supplied to the container. If the planar heating element 21 is set to have a higher priority than the working coil 23, the container placed in the heating zone 14 is heated by a direct heating method, and heat energy corresponding to the second level is supplied to the container. I can.

In another example, the working coil 23 is set to have a higher priority than the planar heating element 21, and the container placed in the heating area 14 is determined to be a container capable of induction heating, and the user has a predetermined standard. When the heating power of the heating region 14 is set to 9 levels, which is the level of 7 or higher, the control circuit simultaneously supplies electric energy to the working coil 23 and the planar heating element 21. Accordingly, since the container placed in the heating region 14 is heated simultaneously by a direct heating method and an induction heating method, thermal energy corresponding to 9 levels can be quickly supplied to the container.

In another embodiment, when it is determined that the container placed in the heating zone 14 is a container capable of induction heating, the control circuit always simultaneously applies electric energy to the working coil 23 and the planar heating element 21 regardless of priority. It can also be controlled to heat the container by feeding.

Depending on the embodiment, the user may directly select or change the heating method (direct heating method, induction heating method) of the container by touching an arbitrary button disposed on the upper plate 10. In addition, depending on the embodiment, when heating a container capable of induction heating, the user may simultaneously drive the working coil 23 and the planar heating element 21 by touching an arbitrary button disposed on the upper plate 10.

As described above, the electric range 1 according to the present invention may determine the type of container placed in the heating region 14 and select a heating method suitable for the container according to the determination result. That is, if the container placed in the heating zone 14 is a container that cannot be heated by the induction heating method, the direct heating method is applied, and if the container placed in the heating zone 14 is a container that can be heated by the induction heating method, it is directly Any one of a heating method and an induction heating method is applied, or both a direct heating method and an induction heating method are applied. Therefore, the user does not need to distinguish or consider the type or characteristic of the container when using the electric range 1 according to the present invention.

In addition, when a user wants to heat a container capable of induction heating using the electric range 1 according to the present invention, the plane heating element 21 and the working coil 23 are driven simultaneously, so that the container can be heated more quickly.

3 is a cross-sectional view of an electric range according to an embodiment of the present invention.

As shown in FIG. 3, in the inner space of the electric range formed by combining the case 12 and the upper plate 10, a planar heating element 21, a heat insulating structure 22, a working coil 23, and a magnetic sheet 24 ), a blowing fan 25, and a main substrate 26 are disposed.

In the embodiment of FIG. 3, the planar heating element 21 is attached to the lower surface of the upper plate portion 10. In addition, the heat insulation structure 22 forms a heat insulation space 31 by combining with the lower surface of the upper plate 10. The planar heating element 21 is disposed inside the heat insulating space 31 formed by the heat insulating structure 22.

In the embodiment of Fig. 3, the heat insulating structure 22 includes a support portion 21a and a cover portion 21b formed integrally. One end of the support portion 21a is coupled to the lower surface of the upper plate portion 10 and the other end supports the cover portion 21b. The cover part (21b) has a plate shape and is combined with the support part (21a) to form a sealed heat insulation space (31).

In one embodiment of the present invention, the heat insulation space 31 may be maintained in a vacuum state. In another embodiment, the heat insulation space 31 may be filled with a gas having heat insulation performance. In addition, the heat insulation structure 22 may be made of a material having heat insulation performance, such as glass or ceramic.

As described above, when electric energy is supplied to the planar heating element 21, the planar heating element 21 generates thermal energy. In this case, as the amount of heat energy generated by the planar heating element 21 transferred to the container placed in the heating region 14 increases, the energy efficiency of the electric range increases. According to the present invention, among the heat energy generated by the planar heating element 21 by the heat insulating space 31 described above, it is not transferred to the container placed in the heating region 14 and is formed by the case 12 and the upper plate 10 The heat energy released into the interior space is reduced. This increases the energy efficiency of the electric range.

Further, a working coil 23 is disposed on the lower surface of the heat insulating structure 22. As described above, when electric energy is supplied to the working coil 23, a magnetic field is formed in the working coil 23 to perform induction heating for the container. As described above, when the working coil 23 is driven by electric energy supplied to the working coil 23, when the temperature of the working coil 23 itself rises above a predetermined temperature value, deformation occurs in the working coil 23 or As the resonant point of (23) is changed, heating of the container may be delayed and the energy efficiency of the electric range may be lowered.

In particular, as described above, when electric energy is simultaneously supplied to the planar heating element 21 and the working coil 23, the thermal energy generated by the planar heating element 21 affects the working coil 23, thereby affecting the container. Heating may be delayed and the energy efficiency of the electric range may be lowered.

According to the present invention, when electric energy is simultaneously supplied to the planar heating element 21 and the working coil 23, the working coil 23 is among the thermal energy generated by the planar heating element 21 by the above-described insulating space 31. The energy efficiency of the electric range increases because the amount of heat energy transferred to it is reduced.

4 is a cross-sectional view of an electric range according to another embodiment of the present invention.

In the embodiment shown in FIG. 4, as in the embodiment of FIG. 3, a planar heating element 21, a heat insulating structure 22, a working coil 23, in an inner space formed by combining the case 12 and the upper plate 10, A magnetic sheet 24, a blowing fan 25, and a main substrate 26 are disposed.

On the other hand, unlike the embodiment of FIG. 3, the heat insulating structure 22 in the embodiment of FIG. 4 includes a first support part 21c, a first cover part 21d, a second support part 21e, and a second cover part ( 21f).

One end of the first support portion 21c is coupled to the lower surface of the upper plate portion 10 and the other end supports the first cover portion 21d. The first cover part 21d has a plate shape and is combined with the first support part 21c to form a sealed first heat insulating space 31.

In addition, one end of the second support part 21e is coupled to the lower surface of the first cover part 21d, and the other end supports the second cover part 21f. The second cover part 21f has a plate shape and is combined with the second support part 21e to form a sealed second heat insulating space 32.

In one embodiment of the present invention, the first insulating space 31 and the second insulating space 32 may be maintained in a vacuum state. In another embodiment, the first heat insulating space 31 and the second heat insulating space 32 may be filled with a gas having heat insulation performance. In addition, the heat insulation structure 22 may be made of a material having heat insulation performance, such as glass or ceramic.

In addition, although not shown in the drawings, at least one spacer having one end connected to the first cover part 21d and the other end connected to the second cover part 21f may be disposed in the second insulating space 32. The spacer supports between the first cover portion 21d and the second cover portion 21f to prevent deformation of the second insulating space 32 due to external pressure or thermal energy.

For reference, FIG. 4 shows an embodiment in which the heat insulation structure 22 includes two heat insulation spaces, that is, a first heat insulation space 31 and a second heat insulation space 32, but the number of heat insulation spaces according to the embodiment is It could be different. For example, the number of heat insulation spaces can be increased by adding the support part and the cover part to the lower part of the heat insulation structure 22.

As described above, in another embodiment of the present invention, by forming two or more heat insulation spaces in the heat insulation structure 22, the heat insulation performance of the heat insulation structure 22 may be further improved. Accordingly, the amount of heat energy supplied to the container placed in the heating space 14 increases, and the amount of heat energy transferred to the space inside the electric range or the working coil 23 decreases, thereby increasing the energy efficiency of the electric range.

5 shows a plurality of working coils and magnetic sheets provided in the electric range according to an embodiment of the present invention.

In the present invention, when the container heating using the working coil 23 is performed, the more the magnetic field formed by the working coil 23 is supplied to the container placed in the heating region 14, the more eddy current is generated in the container. It is preferable that the distance between (23) and the container is kept small.

However, as described through the embodiments of FIGS. 1 to 4, the working coil 23 of the electric range according to the present invention is printed or attached to the lower surface of the heat insulating structure 22, and the working coil 23 and the heating area A heat insulating structure 22 is disposed between the containers placed on (14). Therefore, since a certain distance is maintained between the working coil 23 and the container, it is necessary to increase the efficiency of heating the container by the working coil 23.

In order to achieve this purpose, in an embodiment of the present invention, a plurality of working coils 23a, 23b, 23c are disposed on the lower surface of the cover part 21b constituting the heat insulating structure 22 as shown in FIG. 5 Can be. For example, as shown in FIG. 5, a first working coil 23a is disposed on the lower surface of the cover part 21b, and a first magnetic sheet 24a is disposed under the first working coil 23a. . In addition, a second working coil 23b is disposed under the first magnetic sheet 24a, and a second magnetic sheet 24b is disposed under the second working coil 23b. In addition, a third working coil 23c is disposed under the second magnetic sheet 24b, and a third magnetic sheet 24c is disposed under the third working coil 23c.

For reference, FIG. 5 shows an embodiment in which three working coils and three magnetic sheets are disposed on the lower surface of the cover part 21b, but the number of working coils and magnetic sheets disposed under the heat insulating structure 22 is implemented. May vary depending on the example.

In this way, by arranging a plurality of working coils 23a, 23b, 23c on the lower surface of the cover part 21b constituting the heat insulating structure 22, the strength and range of the magnetic field generated by the working coils 23a, 23b, 23c Increases. Accordingly, a phenomenon in which induction heating performance by the working coil is deteriorated due to the gap between the working coil and the container can be compensated.

The above-described present invention is capable of various substitutions, modifications, and changes without departing from the technical spirit of the present invention for those of ordinary skill in the technical field to which the present invention belongs. Is not limited by

Claims (17)

A case forming an inner space having a predetermined volume;
An upper plate part that is coupled to the upper surface of the case to seal the inner space and made of a material having electrical insulation and thermal conductivity;
A heat insulating structure disposed in the inner space and coupled to one surface of the upper plate to form a heat insulating space;
A heating element disposed inside the heat insulating space, disposed at a position corresponding to the heating region of the upper plate, and emitting thermal energy when electric energy is supplied; And
And a working coil disposed outside the heat insulating space, disposed at a position corresponding to the heating region of the upper plate, and forming an inductive magnetic field when electric energy is supplied.
Electric range.
The method of claim 1,
The insulating structure is
A support part attached to one surface of the upper plate part; And
Comprising a cover portion coupled to one surface of the support to seal the heat insulation space
Electric range.
The method of claim 2,
The support part and the cover part are integrally formed
Electric range.
The method of claim 2,
The cover part
Including two or more cover portions spaced apart at predetermined intervals
Electric range.
The method of claim 4,
The cover part
Further comprising at least one spacer disposed between the two or more cover parts
Electric range.
The method of claim 4,
The space between the two or more cover parts is maintained in a vacuum state or filled with gas for insulation.
Electric range.
The method of claim 1,
The working coil is
Made of a metal material and attached or printed on the surface of the insulating structure in the form of a thin film
Electric range.
The method of claim 1,
The electric range is
Including a plurality of insulating substrates and a plurality of working coils alternately disposed with each other
Electric range.
The method of claim 1,
Further comprising a blowing fan disposed in the inner space
Electric range.
The method of claim 9,
The blower fan
Disposed on the side or bottom of the working coil
Electric range.
The method of claim 1,
Further comprising at least one support disposed between the working coil and the case
Electric range.
The method of claim 1,
Further comprising a control circuit for performing a container detection operation to determine the type of the container placed in the heating region using the working coil,
The control circuit is
To determine the heating method for the vessel according to the vessel detection result
Electric range.
The method of claim 12,
The control circuit is
If it is determined that the container is a container in which induction heating is not possible as a result of the detection of the container, it is determined to heat the container using the planar heating element.
Electric range.
The method of claim 12,
The control circuit is
If it is determined that the container is a container capable of induction heating as a result of the detection of the container, determining that the container is heated using at least one of the planar heating element and the working coil
Electric range.
The method of claim 12,
The control circuit is
When it is determined that the container is a container capable of induction heating as a result of the detection of the container, heating the container by driving any one of the planar heating element and the working coil according to a predetermined priority.
Electric range.
The method of claim 12,
The control circuit is
If it is determined that the container is a container capable of induction heating, the heating power level set by the user is compared with a predetermined reference level, and a heating method of the container is determined according to the comparison result.
Electric range.
The method of claim 16,
The control circuit is
If the thermal power level set by the user is less than a predetermined reference level, the container is heated by driving any one of the planar heating element and the working coil according to a predetermined priority,
When the heating power level set by the user is equal to or higher than a predetermined reference level, heating the container by simultaneously driving the planar heating element and the working coil
Electric range.

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