KR20200134200A - Induction heating type cooktop having improved usability - Google Patents

Abstract

The present invention relates to an induction heating type cooktop having improved convenience of use. According to an embodiment of the present invention, the induction heating type cooktop includes: a case; a cover plate coupled to an upper end of the case and provided with a top plate part on which an object to be heated is disposed; a working coil provided inside the case; and a thin film disposed to overlap the working coil in the vertical direction. The skin depth of the thin film is deeper than the thickness of the thin film.

Description

Induction heating type cooktop with improved ease of use {INDUCTION HEATING TYPE COOKTOP HAVING IMPROVED USABILITY}

The present invention relates to an induction heating type cooktop with improved ease of use.

Various types of cooking utensils are used to heat food at home or in a restaurant. Conventionally, gas ranges using gas as fuel have been widely used and widely used, but recently, devices for heating an object to be heated, such as a pan, by using electricity without using gas have been popularized.

Methods of heating an object to be heated using electricity are largely divided into resistance heating and induction heating. The electrical resistance method is a method of heating an object to be heated by transferring heat generated when an electric current is passed through a metal resistance wire or a non-metallic heating element such as silicon carbide to an object to be heated (for example, a cooking container) through radiation or conduction. In addition, the induction heating method generates an eddy current in the object to be heated made of metal by using a magnetic field generated around the coil when high-frequency power of a predetermined size is applied to the coil so that the object to be heated itself is heated. to be.

In recent years, most of the induction heating method is applied to the cooktop.

However, in the case of the cooktop to which the induction heating method is applied, there is a limitation that only the magnetic material can be heated. That is, when a non-magnetic material (eg, heat-resistant glass, pottery, etc.) is disposed on the cooktop, there is a problem that the cooktop to which the induction heating method is applied cannot heat the object to be heated.

Accordingly, various methods have been devised as follows in order to overcome the limitations of the conventional induction heating type cooktop.

First, a method of adding a heating plate that can be heated by an induction heating method between the cooktop and the nonmagnetic material was devised. Referring to Japanese Patent Publication No. 5630495 (2014.10.17), a method of induction heating by adding a heating plate is disclosed.

However, in the case of this method, there is a problem that not only the heating efficiency is lowered, but the time required to boil water is greatly increased than before. More specifically, the method is characterized in that a communication hole is formed in the heating plate. When the cooking container has a magnetic material, the heating plate is also heated by electromagnetic induction heating the cooking container using a magnetic line of force passing through the communication hole. By using electromagnetic induction heating, there was a problem such as a decrease in heating efficiency.

As another method, a hybrid cooktop has been devised that heats a nonmagnetic material through a radiant heater to which an electric resistance method is applied, and heats a magnetic material through a working coil to which an induction heating method is applied. Referring to Japanese Laid-Open Patent Publication No. 2008-311058 (2008.12.25), a configuration of a hybrid cooktop is disclosed.

However, in the case of this method, there is a problem that the output of the radiant heater is low and heating efficiency is low, and there is an inconvenience that the user must consider the material of the object to be heated when placing the object to be heated in the heating area.

Finally, an all-metal cooktop has been devised that can heat all metal objects to be heated (ie, non-magnetic metals and magnetic objects). Referring to US Patent Publication No. 6,770,857 (2004.08.03), the configuration of an all-metal cooktop is disclosed.

However, in the case of this method, there is a problem that a non-metallic object to be heated cannot be heated. In addition, when heating a non-magnetic metal object to be heated, there is also a problem that heating efficiency is lower and material cost is higher than that of the radiant heater technology.

Accordingly, there is a growing need for new technology development capable of overcoming the limitations of the induction heating type cooktop.

As described above, conventional devices capable of heating both magnetic and non-magnetic materials perform electromagnetic induction heating using only a magnetic line of force passing through a communication hole formed in a heating plate, or use a radiant heater having a low output and low efficiency. There was a falling problem.

Alternatively, conventional devices have problems in that the user must consider the material of the object to be heated in some cases, or some objects such as non-metallic objects to be heated cannot be heated.

An object of the present invention is to provide an induction heating type cooktop capable of solving the problems of the conventional devices described above.

More specifically, it is an object of the present invention to provide an induction heating type cooktop with high heating efficiency while heating a corresponding object to be heated regardless of the type of object to be heated.

In addition, an object of the present invention is to provide an induction heating type cooktop capable of heating both a magnetic material and a non-magnetic material without considering the material of the object to be heated.

In addition, another object of the present invention is to provide an induction heating type cooktop capable of directly or indirectly heating an object to be heated with the same heat source.

In addition, another object of the present invention is that when the object to be heated is magnetic, most of the eddy current is applied to the object to be heated so that the working coil directly heats the object to be heated, and if the object to be heated is non-magnetic, the working coil is the object to be heated. It is to provide an induction heating type cooktop capable of indirectly heating the.

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 cooktop of the induction heating method according to an embodiment of the present invention includes a case, a cover plate coupled to an upper end of the case and having an upper plate portion on which an object to be heated is disposed, a working coil provided inside the case, and the And a thin film disposed to overlap the working coil in a vertical direction, and the skin depth of the thin film is deeper than the thickness of the thin film.

The cooktop of the induction heating method according to an embodiment of the present invention includes a case, a cover plate coupled to an upper end of the case and having an upper plate portion on which an object to be heated is disposed, a working coil provided inside the case, and the And a thin film disposed to overlap a working coil in a vertical direction, and the thin film has a resistance value capable of being heated by the working coil, and a magnetic field generated by the working coil passes through the thin film and the object to be heated It has a thickness that can be transmitted up to.

The thin film of the cooktop of the induction heating method according to an embodiment of the present invention may be disposed on the lower surface of the upper plate.

The thin film of the cooktop of the induction heating method according to an embodiment of the present invention may be formed of a material that can be heated by electromagnetic induction of the working coil.

The thin film of the cooktop of the induction heating method according to an embodiment of the present invention may have a non-magnetic property.

The thin film of the cooktop of the induction heating method according to an embodiment of the present invention may have a resistance value that can be heated by the working coil.

The thin film of the cooktop of the induction heating method according to an embodiment of the present invention may be made of a conductive material.

The thin film of the cooktop of the induction heating method according to an embodiment of the present invention may have a shape in which a plurality of rings of different diameters are repeated.

Since the cooktop of the induction heating method according to the present invention can heat both magnetic and nonmagnetic materials, the object to be heated can be heated regardless of the location and type of the object to be heated. Accordingly, the user may place the object to be heated on an arbitrary heating area on the upper plate without needing to determine whether the object to be heated is magnetic or non-magnetic, so that user convenience can be improved.

In addition, since the cooktop of the induction heating method according to the present invention can directly or indirectly heat an object to be heated with the same heat source, there is no need to provide a separate heating plate or radiant heater. Accordingly, not only can heating efficiency be increased, but material cost can be reduced.

In addition to the above-described effects, specific effects of the present invention will be described together while describing specific details for carrying out the present invention.

1 is a diagram illustrating an induction heating type cooktop according to an embodiment of the present invention.
FIG. 2 is a diagram illustrating components provided in the case of the cooktop of the induction heating method shown in FIG. 1.
3 and 4 are diagrams illustrating a relationship between a thickness of a thin film and a skin depth.
5 and 6 are diagrams illustrating an impedance change between a thin film and an object to be heated according to the type of the object to be heated.
7 is a diagram illustrating an induction heating type cooktop according to another embodiment of the present invention.
FIG. 8 is a diagram illustrating components provided inside a case of the induction heating type cooktop shown in FIG. 7.
9 is a view for explaining a state in which an object to be heated is disposed on the cooktop of the induction heating method illustrated in FIG. 7.

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, an induction heating type cooktop according to an embodiment of the present invention will be described.

1 is a diagram illustrating an induction heating type cooktop according to an embodiment of the present invention. FIG. 2 is a diagram illustrating components provided inside a case of the cooktop of the induction heating method illustrated in FIG. 1. 3 and 4 are diagrams illustrating skin depth characteristics according to the relative permeability of a thin film. 5 and 6 are diagrams illustrating an impedance change between a thin film and an object to be heated according to the type of the object to be heated.

First, referring to FIG. 1, the cooktop 1 of the induction heating method according to an embodiment of the present invention includes a case 25, a cover plate 20, and working coils WC1 and WC2; that is, first and second. Working coil), thin films TL1 and TL2; that is, first and second thin films.

Working coils WC1 and WC2 may be installed in the case 25.

For reference, in the case 25, in addition to the working coils WC1 and WC2, various devices related to driving of the working coil (for example, a power supply unit that provides AC power, a rectifier unit that rectifies AC power from the power supply unit to DC power, and a rectifier unit) An inverter unit that converts the DC power rectified by the DC power into a resonance current through a switching operation and provides it to the working coil, a control module that controls the operation of various devices in the cooktop 1 of the induction heating method, and turns the working coil on or off. A relay or a semiconductor switch) may be installed, but a detailed description thereof will be omitted.

The cover plate 20 may be coupled to an upper end of the case 25 and may include an upper plate portion 15 on which an object to be heated (not shown) is disposed on the upper surface.

Specifically, the cover plate 20 may include an upper plate portion 15 for placing an object to be heated, such as a cooking container.

Here, the upper plate portion 15 may be made of, for example, a glass material (eg, ceramic glass).

In addition, the upper panel 15 may be provided with an input interface (not shown) that receives an input from a user and transmits the input to a control module (not shown) for an input interface. Of course, the input interface may be provided at a location other than the upper plate 15.

For reference, the input interface is a module for inputting a heating intensity desired by a user or a driving time of the cooktop 1 of an induction heating method, and may be variously implemented with a physical button or a touch panel. In addition, the input interface may include, for example, a power button, a lock button, a power level control button (+, -), a timer control button (+, -), a charging mode button, and the like. In addition, the input interface may transmit an input provided from a user to a control module for an input interface (not shown), and the control module for an input interface may transmit the input to the above-described control module (ie, a control module for an inverter). In addition, the above-described control module can control the operation of various devices (eg, working coils) based on the input (ie, user input) provided from the control module for the input interface. do.

Meanwhile, whether the working coils WC1 and WC2 are driven and the heating intensity (ie, thermal power) may be visually displayed on the upper plate 15 in the shape of a crater. The shape of the crater may be displayed by an indicator (not shown) composed of a plurality of light-emitting elements (eg, LEDs) provided in the case 25.

The working coils WC1 and WC2 may be installed inside the case 25 to heat the object to be heated.

Specifically, the working coils WC1 and WC2 may be driven by the above-described control module (not shown), and when an object to be heated is disposed on the upper plate 15, it may be driven by the control module.

In addition, the working coils (WC1, WC2) can directly heat an object to be heated (i.e., a magnetic material) having magnetic properties, and thin films (TL1, TL2) to be described later are formed to describe the object to be heated (i.e., a non-magnetic material) that does not have magnetism. It can be heated indirectly through.

In addition, the working coils WC1 and WC2 may heat the object to be heated by an induction heating method, and may be provided to overlap the thin films TL1 and TL2 in a vertical direction (ie, a vertical direction or a vertical direction).

For reference, although it is shown in FIG. 1 that two working coils WC1 and WC2 are installed on the case 25, the present invention is not limited thereto. That is, one or three or more working coils may be installed in the case 25, but in an embodiment of the present invention for convenience of description, two working coils WC1 and WC2 are installed in the case 25 It will be described with an example of becoming.

The thin films TL1 and TL2 may be coated on the upper plate 15 to heat a nonmagnetic material among objects to be heated.

Specifically, the thin films TL1 and TL2 may be coated on the upper or lower surface of the upper plate 15, and may be provided to overlap the working coils WC1 and WC2 in a vertical direction (ie, vertical or vertical direction). . Accordingly, it is possible to heat the object to be heated regardless of the location and type of the object to be heated.

In addition, the thin films TL1 and TL2 may have at least one of magnetic and non-magnetic properties (ie, magnetic, non-magnetic, or both magnetic and non-magnetic).

In addition, the thin films TL1 and TL2 may be made of, for example, a conductive material (eg, aluminum), and as shown in the drawing, a plurality of rings of different diameters are repeated. It may be coated on the upper surface, but is not limited thereto.

That is, the thin films TL1 and TL2 may be made of a material other than a conductive material, or may be coated on the upper plate portion 15 in a different shape. However, for convenience of explanation, in one embodiment of the present invention, for example, the thin films TL1 and TL2 are made of a conductive material, and a plurality of rings of different diameters are repeatedly coated on the upper plate 15. I will listen and explain.

For reference, although two thin films TL1 and TL2 are illustrated in FIG. 1, the present invention is not limited thereto. That is, one or three or more thin films may be coated, but for convenience of description, in an embodiment of the present invention, two thin films TL1 and TL2 are coated as an example.

More detailed information on the thin films TL1 and TL2 will be described later.

Next, referring to FIG. 2, the cooktop 1 of the induction heating method according to an embodiment of the present invention further includes an insulating material 35, a shielding plate 45, a support member 50, and a cooling fan 55. can do.

For reference, a component disposed around the first working coil WC1 and a component disposed around the second working coil (WC2 in FIG. 1) are the same bar. Hereinafter, for convenience of description, the first The surrounding components (the first thin film TL1, the heat insulating material 35, the shielding plate 45, the support member 50, and the cooling fan 55) will be described centering on the working coil WC1.

The heat insulating material 35 may be provided between the lower surface of the upper plate 15 and the first working coil WC1.

Specifically, the heat insulating material 35 may be mounted on the lower surface of the cover plate 20, that is, the upper plate portion 15, and the first working coil WC1 may be disposed under the cover plate 20.

The heat insulator 35 may block the heat generated when the first thin film TL1 or the object to be heated HO is heated by the driving of the first working coil WC1 from being transferred to the first working coil WC1. have.

That is, when the first thin film TL1 or the object to be heated HO is heated by electromagnetic induction of the first working coil WC1, the heat of the first thin film TL1 or the object to be heated HO is transferred to the top plate 15 ), and the heat of the upper plate portion 15 is transferred to the first working coil WC1 again, so that the first working coil WC1 may be damaged.

In this way, by blocking heat transmitted to the first working coil WC1, the heat insulating material 35 can prevent the first working coil WC1 from being damaged by heat, and furthermore, the first working coil WC1 It is also possible to prevent the heating performance from deteriorating.

For reference, although not an essential component, a spacer (not shown) may be installed between the first working coil WC1 and the heat insulating material 35.

Specifically, the spacer may be inserted between the first working coil WC1 and the heat insulating material 35 so that the first working coil WC1 and the heat insulating material 35 do not directly contact each other. Accordingly, the spacer transfers heat generated when the first thin film TL1 or the object to be heated HO is heated by the driving of the first working coil WC1 to the first working coil WC1 through the insulating material 35. It can be blocked from being transmitted.

That is, since the spacer can partly share the role of the heat insulating material 35, the thickness of the heat insulating material 35 can be minimized, through which the distance between the object to be heated HO and the first working coil WC1 Can be minimized.

In addition, a plurality of spacers may be provided, and the plurality of spacers may be disposed to be spaced apart from each other between the first working coil WC1 and the heat insulating material 35. Accordingly, air sucked into the case 25 by the cooling fan 55 to be described later may be guided to the first working coil WC1 by the spacer.

That is, the spacer guides the air introduced into the case 25 by the cooling fan 55 to be properly transferred to the first working coil WC1, thereby improving the cooling efficiency of the first working coil WC1. I can.

The shielding plate 45 is mounted on the lower surface of the first working coil WC1 to block a magnetic field generated downward when the first working coil WC1 is driven.

Specifically, the shielding plate 45 may block a magnetic field generated downward when the first working coil WC1 is driven, and may be supported upward by the support member 50.

The support member 50 may be installed between the lower surface of the shielding plate 45 and the lower surface of the case 25 to support the shielding plate 45 upward.

Specifically, by supporting the shielding plate 45 upward, the support member 50 may indirectly support the heat insulating material 35 and the first working coil WC1 upward, through which the heat insulating material 35 It can be made to be in close contact with the upper plate (15).

As a result, the distance between the first working coil WC1 and the object to be heated HO can be kept constant.

For reference, the support member 50 may include, for example, an elastic body (eg, a spring) for supporting the shield plate 45 upward, but is not limited thereto. In addition, since the support member 50 is not an essential component, it may be omitted from the cooktop 1 of the induction heating method.

The cooling fan 55 may be installed inside the case 25 to cool the first working coil WC1.

Specifically, the cooling fan 55 may be driven by the control module described above, and may be installed on the side wall of the case 25. Of course, the cooling fan 55 may be installed at a location other than the side wall of the case 25, but in an embodiment of the present invention, for convenience of description, the cooling fan 55 is a side wall of the case 25 It will be described with an example installed in.

In addition, as shown in FIG. 2, the cooling fan 55 sucks air outside the case 25 and transfers it to the first working coil WC1 or sucks air (especially, heat) inside the case 25 It can be discharged to the outside of the case 25.

Through this, it is possible to efficiently cool the components inside the case 25 (in particular, the first working coil WC1).

In addition, as described above, air outside the case 25 transferred to the first working coil WC1 by the cooling fan 55 may be guided to the first working coil WC1 by a spacer. Accordingly, direct and efficient cooling of the first working coil WC1 is possible, thereby improving the durability of the first working coil WC1 (that is, improving durability by preventing thermal damage).

As described above, the cooktop 1 of the induction heating method according to an embodiment of the present invention may have the above-described characteristics and configuration. Hereinafter, with reference to FIGS. 3 to 6, the characteristics and configuration of the aforementioned thin film It will be described in more detail.

3 and 4 are diagrams illustrating a relationship between a thickness of a thin film and a skin depth. 5 and 6 are diagrams illustrating an impedance change between a thin film and an object to be heated according to the type of the object to be heated.

For reference, the first thin film TL1 and the second thin film TL2 have the same technical characteristics, and the thin films TL1 and TL2 may be coated on the upper surface or the lower surface of the upper plate part 15. For convenience, the first thin film TL1 coated on the upper surface of the upper plate 15 will be described as an example.

The characteristics of the first thin film TL1 are as follows.

First, the first thin film TL1 may be made of a material having a low relative permeability.

Specifically, since the relative permeability of the first thin film TL1 is low, the skin depth of the first thin film TL1 may be deep. Here, the skin depth means the depth of current penetration from the surface of the material, and the relative permeability may be inversely proportional to the skin depth. Accordingly, the lower the relative permeability of the first thin film TL1 is, the deeper the skin depth of the first thin film TL1 is.

In addition, a skin depth of the first thin film TL1 may be deeper than a thickness of the first thin film TL1. That is, the first thin film TL1 has a thin thickness (for example, 0.1 μm to 200 μm thickness), and the skin depth of the first thin film TL1 is deeper than the thickness of the first thin film TL1. The magnetic field generated by the coil WC1 passes through the first thin film TL1 and is transmitted to the object to be heated HO, thereby inducing an eddy current to the object to be heated HO.

That is, as shown in FIG. 3, when the skin depth of the first thin film TL1 is shallower than the thickness of the first thin film TL1, the magnetic field generated by the first working coil WC1 is ), you can see that it is difficult to reach.

However, as in an embodiment of the present invention (that is, as shown in FIG. 4), when the skin depth of the first thin film TL1 is deeper than the thickness of the first thin film TL1, the first working coil WC1 It can be seen that the magnetic field generated by) is mostly transmitted to the object to be heated (HO). That is, in an embodiment of the present invention, since the skin depth of the first thin film TL1 is deeper than the thickness of the first thin film TL1, the magnetic field generated by the first working coil WC1 is the first thin film TL1. ), the object to be heated (HO) is mostly exhausted, and through this, the object to be heated (HO) can be mainly heated.

Meanwhile, since the first thin film TL1 has a thin thickness as described above, it may have a resistance value that can be heated by the first working coil WC1.

Specifically, the thickness of the first thin film TL1 may be in inverse proportion to the resistance value (ie, surface resistance value) of the first thin film TL1. That is, as the thickness of the first thin film TL1 coated on the upper plate 15 decreases, the resistance value (ie, surface resistance) of the first thin film TL1 increases, and the first thin film TL1 is the upper plate 15 By being thinly coated on, the properties can be changed into a heatable load.

For reference, the first thin film TL1 may have a thickness between 0.1 μm and 200 μm, for example, but is not limited thereto.

The first thin film TL1 having such a characteristic exists to heat the nonmagnetic material, and the impedance characteristic between the first thin film TL1 and the object to be heated HO is to be heated disposed on the upper surface of the upper plate 15. It can change depending on whether the object (HO) is magnetic or non-magnetic.

First, the case where the object to be heated is a magnetic substance is as follows.

Referring to FIGS. 2 and 5, when an object to be heated HO having a magnetic property is disposed on the upper surface of the upper plate portion 15 and the first working coil WC1 is driven, an object to be heated HO having a magnetism The resistance component R1 and the inductor component L1 of may form an equivalent circuit with the resistance component R2 and the inductor component L2 of the first thin film TL1.

In this case, the impedance of the object to be heated that exhibits magnetism in the equivalent circuit (i.e., the impedance composed of R1 and L1) may be smaller than the impedance of the first thin film TL1 (i.e., the impedance composed of R2 and L2). .

Accordingly, when the above-described equivalent circuit is formed, the size of the eddy current I1 applied to the magnetic object HO to be heated may be larger than the size of the eddy current I2 applied to the first thin film TL1. . More specifically, most of the eddy current is applied to the object to be heated HO, so that the object to be heated HO may be heated.

That is, when the object to be heated (HO) is a magnetic substance, the above-described equivalent circuit is formed so that most of the eddy current is applied to the object to be heated (HO), and the first working coil (WC1) refers to the object to be heated (HO). Can be heated directly.

Of course, since some eddy current is applied to the first thin film TL1 as well, the first thin film TL1 is slightly heated, and the object to be heated HO may be slightly heated indirectly by the first thin film TL1. However, compared with the degree to which the object to be heated HO is directly heated by the first working coil (WC1), the degree to which the object to be heated (HO) is indirectly heated by the first thin film (TL1) is significant. Can not.

On the other hand, the case where the object to be heated is non-magnetic is as follows.

2 and 6, when an object to be heated HO that does not have magnetism is disposed on the upper surface of the upper plate 15 and the first working coil WC1 is driven, an object to be heated that does not have magnetism ( H O) does not have an impedance, and the first thin film TL1 may have an impedance. That is, the resistance component R and the inductor component L may exist only in the first thin film TL1.

Accordingly, the eddy current I may be applied only to the first thin film TL1, and the eddy current may not be applied to the object H0 to be heated, which does not exhibit magnetism. More specifically, the eddy current I may be applied only to the first thin film TL1 to heat the first thin film TL1.

That is, when the object to be heated HO is a non-magnetic material, as described above, the eddy current I is applied to the first thin film TL1 to heat the first thin film TL1, which is not magnetic. The object HO may be indirectly heated by the first thin film TL1 heated by the first working coil WC1.

In summary, irrespective of whether the object to be heated HO is magnetic or non-magnetic, the object to be heated HO may be directly or indirectly heated by a single heat source called the first working coil WC1. That is, when the object to be heated HO is a magnetic substance, the first working coil WC1 directly heats the object to be heated HO, and when the object to be heated HO is a non-magnetic substance, the first working coil WC1 The first thin film TL1 heated by) can indirectly heat the object to be heated HO.

As described above, the cooktop 1 of the induction heating method according to an embodiment of the present invention can heat both a magnetic material and a non-magnetic material, so that the object to be heated is heated regardless of the location and type of the object to be heated. Can be heated. Accordingly, the user may place the object to be heated on an arbitrary heating area on the upper plate without needing to determine whether the object to be heated is magnetic or non-magnetic, so that user convenience can be improved.

In addition, since the cooktop 1 of the induction heating method according to an embodiment of the present invention can directly or indirectly heat an object to be heated with the same heat source, there is no need to provide a separate heating plate or radiant heater. Accordingly, not only can heating efficiency be increased, but material cost can be reduced.

Hereinafter, an induction heating method cooktop according to another embodiment of the present invention will be described.

7 is a diagram illustrating an induction heating type cooktop according to another embodiment of the present invention. FIG. 8 is a diagram illustrating components provided inside a case of the induction heating type cooktop shown in FIG. 7. 9 is a view for explaining a state in which an object to be heated is disposed on the cooktop of the induction heating method shown in FIG.

For reference, the cooktop 2 of the induction heating method according to another embodiment of the present invention is the same as the cooktop 1 of the induction heating method of FIG. 1 except for some components and effects. do.

7 and 8, the cooktop 2 of the induction heating method according to another embodiment of the present invention, unlike the cooktop 1 of the induction heating method of FIG. 1, is a ZONE FREE type cooktop. I can.

Specifically, the cooktop 2 of the induction heating method includes a case 25, a cover plate 20, a plurality of thin films (TLG), an insulating material 35, a plurality of working coils (WCG), a shield plate 45, and a support. A member 50, a cooling fan (not shown), a spacer (not shown), and a control module (not shown) may be included.

Here, the plurality of thin films Tlg and the plurality of working coils WCG may overlap each other in a vertical direction, and may be disposed to correspond to each other one-to-one. Of course, a plurality of thin films (TLG) and a plurality of working coils (WCG) may be a multi-to-one correspondence or one-to-many correspondence rather than a one-to-one correspondence, but for convenience of description, the present invention In another embodiment, a description will be made by taking as an example that a plurality of thin films Tlg and a plurality of working coils WCG are arranged to correspond one-to-one.

That is, the induction heating type cooktop 2 is a John-free type cooktop including a plurality of thin films (TLG) and a plurality of working coils (WCG), and one object to be heated (HO) is converted into a plurality of working coils (WCG). ), it may be heated simultaneously with some or all of them, or with some or all of the plurality of thin films Tlg. Of course, some or all of the plurality of working coils WCG and some or all of the plurality of thin films Tlg may be used to heat the object HO to be heated.

Therefore, as shown in FIG. 9, in an area in which a plurality of working coils (WCG in FIG. 8) and a plurality of thin films (TLG) exist (for example, an area of the upper plate 15), the object to be heated HO1, The object to be heated (HO1, HO2) can be heated regardless of the size, location, and type of HO2).

The above-described present invention is capable of various substitutions, modifications, and changes within the scope of the technical spirit of the present invention to those of ordinary skill in the technical field to which the present invention belongs. Is not limited by

20: cover plate 25: case
TL1, TL2: first and second thin film WC1, WC2: first and second working coil
35: insulation 45: shielding plate
50: support member 55: cooling fan

Claims (12)

case;
A cover plate coupled to an upper end of the case and having an upper plate portion on which an object to be heated is disposed;
A working coil provided inside the case; And
Including a thin film disposed to overlap the working coil in the vertical direction,
The skin depth of the thin film is deeper than the thickness of the thin film induction heating method cooktop.
The method of claim 1, wherein the thin film is
An induction heating type cooktop disposed on a lower surface of the upper plate.
The method of claim 1, wherein the thin film is
Induction heating type cooktop formed of a material that can be heated by electromagnetic induction of the working coil.
The method of claim 3, wherein the thin film is
An induction heating type cooktop having a nonmagnetic characteristic and having a resistance value that can be heated by the working coil.
The method of claim 3, wherein the thin film is
Induction heating cooktop made of conductive material.
The method of claim 1, wherein the thin film is
Induction heating type cooktop having a repeating shape of a plurality of rings of different diameters.
case;
A cover plate coupled to an upper end of the case and having an upper plate portion on which an object to be heated is disposed;
A working coil provided inside the case; And
Including a thin film disposed to overlap the working coil in the vertical direction,
The thin film has a resistance value that can be heated by the working coil, and a magnetic field generated by the working coil passes through the thin film and has a thickness that can be transmitted to the object to be heated.
The method of claim 7, wherein the thin film
An induction heating type cooktop disposed on a lower surface of the upper plate.
The method of claim 7, wherein the thin film
Induction heating type cooktop formed of a material that can be heated by electromagnetic induction of the working coil.
The method of claim 9, wherein the thin film
Induction heating type cooktop with non-magnetic properties.
The method of claim 9, wherein the thin film
Induction heating cooktop made of conductive material.
The method of claim 7, wherein the thin film
Induction heating type cooktop having a repeating shape of a plurality of rings of different diameters.

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