KR20180066870A - Heating Module for induction range and induction range including the same - Google Patents

Abstract

A heating module for an induction range is provided. The heating module for an induction range according to an exemplary embodiment of the present invention includes: at least one flat coil for generating a magnetic field so that an induction heating container made of metal materials can be heated by an eddy current; and a shielding sheet disposed on one surface of the flat coil, shielding a magnetic field generated from the flat coil and focusing the magnetic field in a required direction, wherein the shielding sheet is composed of a thin plate magnetic body whose saturation magnetic flux density is 1.2 tesla or more. Accordingly, the present invention can reduce an overall weight and power consumption.

Description

TECHNICAL FIELD [0001] The present invention relates to a heating module for an induction cooking stove and an induction cooking stove including the heating module,

The present invention relates to a heating module for induction cooking using an induction heating principle and an induction cooking stove including the heating module.

A typical cooking appliance, a gas stove, is a method of directly heating a cooking appliance using a flame while it is installed in a sink. Accordingly, there is a risk of fire in the cooking process using the gas stove.

Accordingly, there is a demand for a cooking device which can be conveniently used in a state of being installed in a sink such as a gas stove, and which minimizes the risk of fire during cooking.

As an example of this, an induction range capable of heating a cooking vessel using an eddy current caused by a magnetic field is being developed.

Such an induction cooking stove is a method of heating a cooking vessel made of a metallic material through an eddy current by supplying power to the coil side to generate a magnetic field.

At this time, a shielding member is disposed on one surface of the coil to increase the efficiency. Conventionally, ferrite is generally used as a shielding member for shielding a magnetic field generated in a coil. However, since ferrites are brittle due to the nature of the material itself, it is difficult to fabricate ferrite in a large area having a relatively short width and length of 100 mm or more. Accordingly, in order to apply the shielding member made of ferrite to the induction cooking range, small-sized ferrite lumps must be fixed through the support.

In addition, when ferrite is used as the shielding member, a ferrite body having a thickness of 5 mm or more should be used in order to meet the required inductance level. Accordingly, since a plurality of ferrite lumps having a thickness of 5 mm or more must be used as the shielding member, the total weight of the ferrite lumps constituting the shielding member is inevitably increased.

As a result, when the ferrite is used as the shielding member, the total weight of the heat-generating module including the shielding member and the coil is very heavy.

In addition, when ferrite is used as the shielding member, the thickness of the ferrite used for the above reasons must be 5 mm or more. Accordingly, in order to satisfy the number of turns and length for satisfying the required inductance, the coil diameter must be also reduced. As a result, the resistance of the coil increases, which causes a problem that the power is excessively consumed.

KR 10-2012-0107059 A1

The present inventors have found that the saturation magnetic flux density of the magnetic material constituting the shielding member has a great influence on the function implementation and thickness as a result of repeated intensive studies and experiments, thereby completing the present invention.

That is, when the shielding member is composed of a magnetic material having a saturation magnetic flux density of at least a certain level, for example, 1.2 Tesla or more, it is possible to stably satisfy the required inductance value even at a very thin thickness of 1.5 mm or less. Respectively.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a heating module for an induction cooking stove capable of satisfying a required inductance value even at a very small thickness of 1.5 mm or less and a induction cooking stove including the heating module.

It is another object of the present invention to provide a heat generating module for induction cooking which can secure freedom of design of a coil and a induction cooking stove including the same.

According to an aspect of the present invention, there is provided an induction heating apparatus comprising: at least one flat coil for generating a magnetic field for heating an induction heating container made of a metal; And a shielding sheet disposed on one surface of the flat coil and shielding a magnetic field generated in the flat coil and focusing the magnetic field in a required direction, wherein the shielding sheet has a thickness of 1.2 Tesla or more, Which is a magnetic body of the induction cooking range.

In a preferred embodiment of the present invention, the magnetic material may be an iron-based amorphous ribbon sheet, or may be a multilayer sheet in which a plurality of amorphous ribbon sheets are laminated in multiple layers, and may be a sheet formed by flake processing and divided into a plurality of minute pieces.

Further, the flat coil may be attached to one surface of the shielding sheet via a heat-resistant adhesive member.

In addition, a plurality of the planar type coils may be provided. In such a case, the plurality of the plate-type coils may be attached to one surface of one shielding sheet at intervals. That is, since the shielding sheet may be formed to have a large area of 100 mm x 100 mm or more, a plurality of flat plate coils may be attached to one shielding sheet at intervals.

In addition, the flat plate type coil may be a form in which the conductive member having a predetermined wire diameter is wound in one direction in a pressed state. At this time, the conductive member may be formed such that the thickness in the height direction perpendicular to the horizontal plane of the shielding sheet is relatively thicker than the width in the width direction parallel to the horizontal plane of the shielding sheet.

The shielding sheet may have a thickness of 0.3 to 1.5 mm.

In addition, the heat shielding sheet may be attached to at least one side of the shielding sheet.

Meanwhile, the above-described heating module for the induction cooking range can be applied to an induction cooking range.

According to the present invention, since the shielding sheet is formed in the form of a very thin sheet having a thickness of 1.5 mm or less, it is possible to use the shielding sheet in a large area while reducing the overall weight.

Further, the present invention secures a degree of design freedom of the coil, so that it is possible to use coils having a larger diameter than that of the prior art, thereby reducing power consumption.

1 is a schematic view showing a heat generating module for an induction cooking range according to an embodiment of the present invention,
2 is a schematic view showing another embodiment of a heating module for an induction cooking range according to an embodiment of the present invention,
FIG. 3 is a plan view of a coil according to an embodiment of the present invention,
Fig. 4 is a cross-sectional view taken along line AA in Fig. 3,
5 is an enlarged sectional view showing a case where a shielding sheet applicable to a heating module for an induction cooking stove is embodied as a multilayer sheet according to an embodiment of the present invention,
6 and 7 are schematic views showing an induction cooking stove to which a heating module for induction cooking is applied according to an embodiment of the present invention. FIG. 6 shows a case where the heating module is applied to an induction cooking stove combined with a large- And FIG. 7 is a view showing a case where the heat generating module is applied to a large-area induction cooking range.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art to which the present invention pertains. The present invention may be embodied in many different forms and is not limited to the embodiments described herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and the same reference numerals are assigned to the same or similar components throughout the specification.

The heating modules 100 and 200 for induction cooking according to an embodiment of the present invention include a flat coil 110 and a shielding sheet 120 as shown in FIGS.

The planar coil 110 may generate a magnetic field when power is supplied so that the induction heating vessel can be heated by an eddy current.

The flat coil 110 may be formed by winding a conductive member having a predetermined length several times, and may be fixed to one surface of the shielding sheet 120 through an adhesive layer (not shown).

Here, the adhesive layer may be a known adhesive or a pressure-sensitive adhesive such as a bond, PVC, rubber or double-sided tape having adhesive properties, but it may preferably be an adhesive layer having heat resistance.

 In the present invention, the conductive member may be made of a conductive metal such as copper, or may be formed of one strand having a predetermined wire diameter, or a plurality of strands may be twisted along the longitudinal direction. In addition, the plate-like coil 110 may have any one of a circular shape, an elliptical shape, a polygonal shape, and a shape in which the conductive member is wound clockwise or counterclockwise and combined with each other.

As described above, the flat coil 110 can generate a magnetic field through a current flowing along the conductive member during power supply, and can heat the induction heating container using an eddy current based on electromagnetic induction.

To this end, a pair of connection terminals for electrically connecting to the circuit board (not shown) of the induction cooking appliance 1 may be provided on both end sides of the flat coil 110, At least one of them may be connected to the circuit board through the shielding sheet 120.

1, the heat generating modules 100 and 200 for induction cooking according to an embodiment of the present invention may include one shielding sheet 120 and one flat coil 110, The plurality of flat plate coils 110 may be disposed on one shielding sheet 120 as shown in FIG.

The shielding sheet 120 may shield the magnetic field generated by the flat coil 110 and focus the shielding sheet 120 in a desired direction.

For this, the shielding sheet 120 may be formed of a magnetic material, and may have a predetermined area to cover one or a plurality of the planar coils 110.

At this time, the shielding sheet 120 may be made of a magnetic material having a saturation magnetic flux density of 1.2 Tesla or more. As a specific example, the shielding sheet 120 may be a thin ribbon sheet 121a including at least one of an amorphous alloy and a nano-crystal alloy.

Accordingly, the heating modules 100 and 200 for the induction cooking stove according to an embodiment of the present invention can be formed into a thin sheet-like sheet shape satisfying the inductance required for smoothly operating the induction cooking stove 1, A relatively short portion of the length may be formed in a wide area having a size of 100 mm to 200 mm.

For example, the shielding sheet 120 may have an inductance required to normally operate the induction cooking stove while having a thickness of 0.3 mm to 1.5 mm, and the shielding sheet 120 may have a large area of 100 × 100 mm ² or more Respectively.

Meanwhile, in the conventional heat generating module using a ferrite body having a saturation magnetic flux density of 0.4 Tesla or less as a shielding member, when the thickness of the ferrite body is 5 mm or more, the inductance required by the induction range is satisfied and the induction range is smoothly operated. Accordingly, since the conventional heat generating module uses a ferrite body having a thickness of 5 mm or more as a shielding member, the entire weight of the ferrite body is very heavy due to its own weight.

In addition, since the ferrite body has a high brittleness due to the characteristics of the material, it is impossible to realize a ferrite body having a large area of 100 × 100 mm ² or more because characteristics are changed by breakage or cracking when the area is widened.

In contrast, the heating modules 100 and 200 for induction cooking according to an embodiment of the present invention realize the shielding sheet 120 through a magnetic body having a saturation magnetic flux density of 1.2 tesla or more, so that even though the shielding sheet 120 has a very thin thickness of 1.5 mm or less, The inductance required by the range can be satisfied, and the induction range can be smoothly operated.

Accordingly, the heat generating modules 100 and 200 for induction cooking according to an embodiment of the present invention can have a very thin thickness of the shielding sheet 120, thereby reducing the overall weight.

In addition, it is possible to increase the thickness of the plate-type coil 110 by the thickness of the shielding sheet 120, which is reduced compared to the conventional one, and thus the design freedom of the plate-type coil 110 can be secured. That is, since the resistance of the conductive member constituting the flat coil 110 can be increased to reduce the resistance, the consumed electric power to be used can be reduced.

In addition, the shielding sheet 120 according to the present invention can have an area of 100 × 100 mm ² or more, so that the heat generating module 200 can be configured in a form in which a plurality of flat plate coils 110 are disposed on one sheet .

Accordingly, when the heating modules 100 and 200 for induction cooking according to an embodiment of the present invention are applied to the induction cooking appliance 1 to form at least one heating area H1 and H4 having a large area, It is possible to minimize the total number of use of the heat generating modules 100 and 200 and the shielding sheet 120 for constituting the heaters H1 and H4.

Accordingly, when the induction cooking appliance 1 is implemented through the heating modules 100 and 200 for the induction cooking stove according to an embodiment of the present invention, the number of the heating modules 100 and 200 used can be minimized, The number of the fastening members or the support members for fixing the plurality of heat generating modules 100 and 200 to each other can be minimized, and space utilization can be increased.

However, it should be noted that the entire thickness and the total area of the shielding sheet 120 applied to the present invention are not limited thereto but may be appropriately varied according to the required specifications (required inductance, used power capacity, etc.). In addition, a thin sheet ribbon sheet including at least one of an amorphous alloy and a nano-crystal alloy is exemplified as the magnetic material embodied by the shielding sheet 120, but the present invention is not limited thereto, and a saturation magnetic flux density of 1.2 Tesla or more and 1.5 mm, it is possible to use any material that can smoothly operate the induction cooking stove without limitation.

Meanwhile, the shielding sheet 120 may be flaked as shown in FIG. 5 to be separated into a plurality of microstructures, and a plurality of neighboring microstructures may be insulated from each other.

Accordingly, the flexibility of the shielding sheet 120 itself can be improved, so that even if the shielding sheet 120 has an area of 100 × 100 mm ² or more, breakage due to external force can be reduced, occurrence of cracks can be minimized, Can be prevented in advance.

In addition, the shielding sheet 120 may have a stacked structure of a plurality of sheets.

As a specific example, the shielding sheet 120 may be a thin ribbon sheet 121a including at least one of an amorphous alloy and a nanocrystalline alloy, and the thin ribbon sheet 121a may be flaked to form a plurality of Can be separated and formed into minute pieces, and each of the minute pieces can be made irregular. Here, the ribbon sheet may be an Fe amorphous ribbon sheet.

In addition, when the shielding sheet 120 is formed of a thin ribbon sheet containing at least one of an amorphous alloy and a nano-crystal alloy, the shielding sheet 120 is flaked to form a plurality of The ribbon sheet 121a may have a multilayer structure. For example, the shielding sheet 120 may be formed by stacking three to thirty layers of the ribbon sheet.

However, it should be noted that the number of stacks of the ribbon sheet is not limited thereto, but may be appropriately varied depending on the required power capacity required according to the specification of the product.

At this time, an adhesive layer 121b containing a nonconductive component may be disposed between the respective ribbon sheets to be laminated in multiple layers. The adhesive layer 121b partially or entirely penetrates to the side of the respective ribbon sheets 121a to be laminated to each other, and moves between the minute pieces constituting the ribbon sheet 121a, thereby insulating neighboring fine pieces from each other It is possible. Here, the adhesive layer may be formed of an adhesive or may be provided on one side or both sides of a substrate in the form of a film with an adhesive applied thereto.

In addition, a separate protective film 122 may be attached to at least one surface of the shielding sheet 120. For example, the protective film 122 may be a fluororesin film such as PET, PI, or PTFE, and preferably a fluororesin film having heat resistance. However, the material of the protective film 122 is not limited thereto, and any known heat resistant resin may be used.

3 and 4, the flat coil 110 may be formed by winding a conductive member constituting the coil body 112 in a state of being pressed in one direction.

That is, the conductive member may have a thickness t1 in the height direction perpendicular to the horizontal surface of the shielding sheet 120, which is greater than a thickness t2 in the width direction parallel to the horizontal surface of the shielding sheet 120 It may be formed to have a thick thickness.

Accordingly, when the plate-like coil 110 having the same number of turns is implemented by using the conductive member having the thickness t2 in the widthwise direction of the conductive member, the plate-like coil 110 is wound on the coil body 112 may be the same as the conventional one, but the thickness of the coil body 112 in the height direction may be increased.

That is, when the planar coil 110 is constituted by a conductive member whose thickness is partially pressed in the same direction as the width direction of the coil body 112, the planar coil 110 is bent in the width direction of the coil body 112 The thickness of the coil body 112 in the height direction can be increased while maintaining the size, so that the cross-sectional area of the conductive member used can be increased.

Accordingly, the heat generating modules 100 and 200 for induction cooking according to an embodiment of the present invention can use a conductive member having a relatively large wire diameter while maintaining the entire width of the flat coil 110 to be the same as the conventional one, The resistance of the member can be reduced. Accordingly, the heating modules 100 and 200 for the induction cooking range according to the embodiment of the present invention can reduce the power consumption consumed by reducing the resistance, so that the consumed power can be reduced and the electricity consumption can be reduced.

Here, when the conductive member has a plurality of strands each having a predetermined diameter and being twisted along the longitudinal direction, the total number of strands to be used is increased, thereby obtaining the same effect.

This is because, as described above, the shielding sheet 120 constituting the heat generating modules 100 and 200 for the induction cooking stove according to an embodiment of the present invention is made of a magnetic material having a saturation magnetic flux density of 1.2 Tesla or more and has a very thin thickness, lt; RTI ID = 0.0 > mm, < / RTI >

Meanwhile, in the heat generating modules 100 and 200 for induction cooking according to an embodiment of the present invention, a sheet heat dissipating member (not shown) may be disposed on one side of the shielding sheet 120. Accordingly, the heat generated in the flat coil 110 can be discharged to the outside through the heat dissipating member.

In addition, the heating modules 100 and 200 for induction cooking according to an embodiment of the present invention may further include a separate support for protecting the shielding sheet 120 or improving the fastening property with other components.

In addition, a temperature sensor 130 for sensing the temperature may be disposed on the hollow portion of the flat coil 110. [

6 and 7, a plurality of heat generating modules 100 and 200 for induction cooking according to an embodiment of the present invention are disposed inside a case 10 of a housing shape, Can be implemented.

In this case, the heat generating modules 100 and 200 may be configured such that one plate-shaped coil 110 is disposed on one shielding sheet 120, and a plurality of plate-shaped coils 110 are formed on one shielding sheet 120 The heat generating module 100 of FIG. 1 and the heat generating module 200 of FIG. 2 may be combined with each other.

When the induction cooking appliance 1 is implemented through the heating modules 100 and 200 for induction cooking according to an embodiment of the present invention, the induction cooking appliance 1 may include at least one heating area H1, H2, H3, H4).

In this case, the heating zones H2 and H3 may be implemented through the heat generating module 100 including one plate-shaped coil 110 and one shielding sheet 120. The heating regions H1 and H4 may be implemented through a heat generating module 200 including a plurality of plate type coils 110 and a single shielding sheet 120. The heating regions H1 and H4 may be formed, May be implemented in a large area through a single heat generating module 200 or may be implemented to have a large area through a plurality of heat generating modules 200 disposed adjacent to each other.

The induction cooking pot 1 is heated by heating the induction heating vessel (not shown) placed on the upper surface of the case 10, specifically, the upper surface corresponding to the heating areas H1, H2, H3 and H4 The food material contained in the induction heating container can be cooked.

That is, when the power is supplied to the heat generating modules 100 and 200 disposed in the case 10, the induction cooking appliance 1 generates a magnetic field due to the flat coil 110 disposed in a region corresponding to the induction heating container . Accordingly, the induction heating vessel can be heated by using an eddy current generated in the flat coil 110. FIG.

Here, the induction heating vessel may be made of a metal such as aluminum or stainless steel. The operation of the induction cooking appliance 1 is well known in the art and will not be described in detail.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

100, 200: heating module for induction cooking range 110: flat plate type coil
120: shielding sheet 130: temperature sensor

Claims (11)

At least one flat coil for generating a magnetic field for heating an induction heating container made of a metallic material; And
And a shielding sheet disposed on one surface of the flat coil and shielding a magnetic field generated by the flat coil and focusing the magnetic field in a desired direction,
Wherein the shielding sheet is a magnetic substance of a thin plate having a saturation magnetic flux density of 1.2 Tesla or more. The method according to claim 1,
Wherein the magnetic body is an iron amorphous ribbon sheet. The method according to claim 1,
Wherein the shielding sheet is a multilayer sheet in which a plurality of amorphous ribbon sheets are laminated in a multilayered structure. The method according to claim 1,
Wherein the shielding sheet is a flake-processed sheet and the sheet is divided into a plurality of micro-pieces. The method according to claim 1,
Wherein the flat coil is attached to one surface of the shielding sheet via a heat-resistant adhesive member. The method according to claim 1,
Wherein the plurality of flat coil coils are attached to one surface of one shielding sheet with a gap therebetween. The method according to claim 1,
Wherein the flat coil is formed by winding a plurality of turns in one direction in a state in which a conductive member having a predetermined wire diameter is pressed. 8. The method of claim 7,
Wherein the conductive member is formed such that the thickness in the height direction perpendicular to the horizontal plane of the shielding sheet has a thickness that is relatively thicker than the thickness in the width direction parallel to the horizontal plane of the shielding sheet. The method according to claim 1,
Wherein the shielding sheet has a thickness of 0.3 to 1.5 mm. The method according to claim 1,
Wherein the heat shielding sheet is attached to at least one surface of the heat resistant protective film. An induction cooking stove including the heating module for induction cooking according to any one of claims 1 to 10.

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