KR20230048981A - Induction heating apparatus using flexible printed circuit board - Google Patents

Abstract

The present invention relates to an induction heating device. In particular, the present invention relates to an induction heating device using a heating FPCB, wherein by using an FPCB that occupies a smaller volume outside a heater pipe that accommodates an aerosol-forming article in a heating space, the aerosol-forming article is heated by induction heating in a susceptor formed on the central axis of a heating space and resistance heating of the FPCB. The induction heating device using an FPCB of the present invention comprises: a heater pipe having a heating space and receiving an aerosol-forming article in the heating space; a susceptor made of a ferromagnetic material formed in the heating space of the heater pipe; a first insulating layer that surrounds the heater pipe or is wrapped around the heater pipe and mounted or disposed on the outside of the heater pipe; an induction heating element including at least one FPCB, provided with a first conductive pattern extending spirally around a certain point on the front surface of the first insulating layer, or a plurality of parallel conductive patterns extend in a spiral shape around the central axis of the heater pipe on the front surface of the first insulating layer and are parallel to each other; and an inverter element that applies AC power to the induction heating element.

Description

Induction heating device using FPCB {INDUCTION HEATING APPARATUS USING FLEXIBLE PRINTED CIRCUIT BOARD}

The present invention relates to an induction heating device, in particular, induction heating in a susceptor formed on the central axis of a heating space using an FPCB occupying a smaller volume on the outside of a heater pipe accommodating an aerosol-forming article in a heating space, It relates to an induction heating device using an FPCB that heats an aerosol-forming article by resistance heating of the FPCB.

1 shows an induction heating device for heating an aerosol-forming article according to the prior art; The induction heating device 1 comprises a device housing 10, which may be formed of plastic, and a DC power source 11 (see FIG. 2) comprising a rechargeable battery 11a.

The induction heating device 1 includes a charging station for charging a rechargeable battery 11a or a docking port 12 including a pin 12a for docking the induction heating device to the charging device. contains more In addition, the induction heating device 1 comprises power supply electronics 13 configured to operate at a desired frequency, for example a frequency of 5 MHz as mentioned above. The power supply electronics 13 are electrically connected to the rechargeable battery 110 via suitable electrical connections 13a.

Tobacco-containing solid aerosol-forming article 20 comprising susceptor 21 is received within cavity 14 at the proximal end of device housing 10 and, during operation, inductor L2 (helically wound cylindrical inductor coil) is inductively coupled to the susceptor 21 of the tobacco-containing solid aerosol-forming article 20 of the smoking article 2 . The filter portion 22 of the smoking article 2 is arranged outside the cavity 14 of the induction heating device 1 so that during operation the consumer may draw an aerosol through the filter portion 22 .

The induction heating device includes an inductor arranged thermally adjacent to an aerosol-forming article, and the aerosol-forming article includes a susceptor. The alternating magnetic field of the inductor causes hysteresis loss and eddy current in the susceptor, causing the susceptor to heat the aerosol-forming article to a temperature capable of releasing volatile components capable of forming the aerosol. do.

In the conventional cylindrical inductor coil (inductor L2) for induction heating function, significant defects occur during winding in the manufacturing process, and it is difficult to apply to small electronic devices because of the large volume due to the thickness of the laminate due to winding. .

The present invention uses an FPCB that occupies a smaller volume on the outside of a heater pipe accommodating an aerosol-forming article in a heating space, and forms an aerosol by induction heating at a susceptor formed on the central axis of the heating space and resistance heating of the FPCB. An object of the present invention is to provide an induction heating device using an FPCB for heating an article.

The induction heating device using the FPCB of the present invention includes a heater pipe having a heating space and accommodating an aerosol-forming article in the heating space, a susceptor made of ferromagnetic material formed in the heating space of the heater pipe, and a heater pipe outside the heater pipe. A first insulating layer wrapped around or wound around a heater pipe and mounted or disposed, a first conductive pattern spirally extending around a certain point on the front surface of the first insulating layer, or a central axis of the heater pipe on the front surface of the first insulating layer It includes an induction heating element including at least one FPCB extending while spirally wrapping around the center and having a plurality of parallel conductive patterns parallel to each other, and an inverter element for applying AC power to the induction heating element.

In addition, the heater pipe is a thermally conductive material, and the induction heating element generates an alternating magnetic field when AC power is applied so that the susceptor becomes induction heating, and the heat generated by resistance heating of the induction heating element passes through the heater pipe. It is preferably supplied to the heating space of the heater pipe.

Also, the heater pipe is preferably made of a ferromagnetic material.

In addition, at least one or more FPCBs include a first conductive pattern formed in a spiral shape on the entire surface of the first insulating layer, a first electrical contact formed on one end of the first conductive pattern and electrically connected to the first terminal of the inverter element, and a first A second electrical contact formed on the other end of the conductive pattern, a third electrical contact electrically connected to the second terminal of the inverter element on the back surface of the first insulating layer, and a fourth electrical contact electrically connected to the second electrical contact, It is preferable to include a first FPCB having a second conductive pattern electrically connecting the third electrical contact and the fourth electrical contact.

In addition, at least one or more FPCBs include a first conductive pattern formed in a spiral shape on the entire surface of the first insulating layer, a first electrical contact formed on one end of the first conductive pattern and electrically connected to the first terminal of the first inverter element, A first FPCB having a second electrical contact formed at the other end of the first conductive pattern, a fifth electrical contact electrically connected to the second terminal of the first inverter element on the entire surface of the second insulating layer, and a second electrical contact A second FPCB including a sixth electrical contact electrically connected to each other and a third conductive pattern electrically connecting the fifth electrical contact and the sixth electrical contact, wherein the first FPCB and the second FPCB are preferably laminated. do.

Also, the at least one FPCB preferably includes a structure in which a plurality of first FPCBs are stacked.

In addition, the induction heating element is spirally wrapped around the central axis of the heater pipe, spirally wound from the bottom of the outer surface of the heater pipe to the top of the outer surface of the heater pipe, and is preferably mounted on the heater pipe.

In addition, the induction heating element is configured to include a first electrical contact electrically connecting one end of each of the plurality of conductive patterns and a second electrical contact electrically connecting the other end of each of the plurality of conductive patterns, the first Preferably, the electrical contact is electrically connected to the first terminal of the inverter element and the second electrical contact is electrically connected to the second terminal of the inverter element.

In addition, the induction heating element preferably includes a plurality of stacked FPCBs.

Also, the first conductive pattern and the parallel conductive pattern are preferably made of copper or constantan.

The present invention does not use a conventional winding coil body, and an FPCB occupying a smaller volume is mounted on the outside of a container for accommodating an aerosol-forming article in a heating space, and induction heating in the susceptor by the FPCB and resistance of the FPCB By heating the aerosol-forming article, the energy efficiency is increased to allow more rapid heating of the aerosol-forming article.

1 is a cross-sectional view of an induction heating apparatus for heating an aerosol-forming article according to the prior art.
2 is plan views of a first embodiment of an induction heating element including an FPCB according to the present invention.
FIG. 3 is a conceptual perspective view of a heating unit equipped with the induction heating element of FIG. 2 .
FIG. 4 is temperature graphs for each position of the induction heating device to which the heating unit of FIG. 2 is mounted.
5 is plan views of a second embodiment of an induction heating element including an FPCB according to the present invention.
FIG. 6 is a conceptual perspective view of a heating unit equipped with the induction heating element of FIG. 5 .

Hereinafter, the present invention will be described in detail through examples and drawings. However, it should be understood that this is not intended to limit the present invention to the specific embodiments, and includes various modifications, equivalents, and/or alternatives of the embodiments of the present invention. In connection with the description of the drawings, like reference numerals may be used for like elements.

In this document, expressions such as "has", "may have", "includes", or "may include" refer to the presence of a corresponding feature (eg, numerical value, function, operation, or component such as a part). , which does not preclude the existence of additional features.

In this document, expressions such as "A or B", "at least one of A and/and B", or "one or more of A or/and B" may include all possible combinations of the items listed together. . For example, "A or B", "at least one of A and B", or "at least one of A or B" includes (1) at least one A, (2) at least one B, Or (3) may refer to all cases including at least one A and at least one B.

Expressions such as "first", "second", "first", or "second" as used herein may modify various elements, in any order and/or importance, and may refer to one element as another. It is used to distinguish from components, but does not limit the components. For example, a first user device and a second user device may represent different user devices regardless of order or importance. For example, without departing from the scope of rights described in this document, a first element may be called a second element, and similarly, the second element may also be renamed to the first element.

A component (e.g., a first component) is "(operatively or communicatively) coupled with/to" another component (e.g., a second component); When referred to as "connected to", it should be understood that the certain component may be directly connected to the other component or connected through another component (eg, a third component). On the other hand, when an element (eg, a first element) is referred to as being “directly connected” or “directly connected” to another element (eg, a second element), the element and the above It may be understood that other components (eg, a third component) do not exist between the other components.

As used in this document, the expression "configured to" means "suitable for", "having the capacity to", depending on the situation. ", "designed to", "adapted to", "made to", or "capable of" can be used interchangeably. The term "configured (or set) to" may not necessarily mean only "specifically designed to" hardware. Instead, in some contexts, the phrase "device configured to" may mean that the device is "capable of" in conjunction with other devices or components. For example, the phrase "a processor configured (or set) to perform A, B, and C" may include a dedicated processor (eg, an embedded processor) to perform those operations, or one or more software programs stored in a memory device that executes By doing so, it may mean a general-purpose processor (eg, CPU or application processor) capable of performing corresponding operations.

Terms used in this document are only used to describe a specific embodiment, and may not be intended to limit the scope of other embodiments. Singular expressions may include plural expressions unless the context clearly dictates otherwise. Terms used herein, including technical or scientific terms, may have the same meaning as commonly understood by a person of ordinary skill in the technical field described in this document. Among the terms used in this document, the terms defined in general dictionaries may be interpreted as having the same or similar meaning to the meaning in the context of the related art, and unless explicitly defined in this document, in an ideal or excessively formal meaning. not interpreted In some cases, even terms defined in this document cannot be interpreted to exclude the embodiments of this document.

An induction heating device (aerosol generating device) equipped with an induction heating element according to the present invention includes a battery, a heater pipe having excellent thermal conductivity and forming a hollow heating space therein, and a heater pipe disposed outside the heater pipe or the heater pipe. An induction heating element wrapped around or wrapped around, a ferromagnetic susceptor formed on the central axis of the heating space in the heater pipe, and an inverter receiving DC power from the battery and converting it into AC power to apply AC power to the induction heating element. Heating an aerosol-forming article (e.g., cigarette, filter, etc.) It is configured to include a data processor and the like to perform the aerosol generating function.

The induction heating element generates an alternating magnetic field by application of AC power from an inverter element so that heat is generated by induction heating in a susceptor or heater pipe. In this embodiment, the heater pipe, induction heating element and susceptor are referred to as a heating unit. An induction heating device has an airflow path through a heater pipe (ie, a heating space) of a heating unit.

When the aerosol-forming article is inserted and seated in the heater pipe, the lower end of the aerosol-forming article is pierced by the upper end of the susceptor in the vertical top direction, so that the susceptor enters at least a portion of the inside of the aerosol-forming article.

2 is plan views of a first embodiment of an induction heating element including an FPCB according to the present invention.

2 (a) and (b) show the first FPCB (F1) included in the induction heating element. The first FPCB (F1) is made of a flexible material and includes a flat insulating layer 30 (eg, polyimide film).

As shown in (a) of FIG. 2, the first FPCB (F1) includes a first conductive pattern 32a formed in a two-dimensional spiral (eg, a right angle spiral) on the front surface 30a of the insulating layer 30, and 1 a first electrical contact 34a formed on one end of the conductive pattern 32a and electrically connected to a first terminal of an inverter element (not shown), and a second electrical contact formed on the other end of the first conductive pattern 32a (34b) is provided.

The first conductive pattern 32a extends in a two-dimensional spiral (for example, a right angle spiral) on the front surface 30a of the insulating layer 30, and is formed at a specific point or a specific area on the front surface 30a of the insulating layer 30. It is formed by extending spirally with (a certain point) as the center. Since the first electrical contact 34a is for electrical connection with the first terminal of the inverter element, it is formed adjacent to the edge of the front surface 30a of the insulating layer 30 . In addition, the distance between one end of the first conductive pattern 32a and the edge of the insulating layer 30 is greater than the distance between the other end of the first conductive pattern 32a and the edge of the insulating layer 30. .

In addition, as shown in (b) of FIG. 2, a third electrical contact electrically connected to the second terminal of the inverter element (not shown) on the back surface 30b of the insulating layer 30 of the first FPCB (F1) ( 36a), a fourth electrical contact 36b electrically connected to the second electrical contact 34b, and a second conductive pattern electrically connecting the third electrical contact 36a and the fourth electrical contact 36b ( 32b) is provided.

Each of the second electrical contact 34b and the third electrical contact 36b is electrically connected to each other through a through hole of the insulating layer 30 .

The first conductive pattern 32a and the second conductive pattern 32b are electrically insulated by the insulating layer 30 .

The second conductive pattern 32b extends in an 'L' shape as shown in (b) of FIG. 2 .

In another embodiment, instead of the second conductive pattern 32b on the back surface 30b of the insulating layer 30 in FIG. 2 (b), the first electrical contact 34a and the second electrical contact 34b are provided. Each may be electrically connected to the first and second terminals of the inverter element through electrical leads. The electrical wire may be made of a copper wire coated with an insulating layer on the outside.

In another embodiment, instead of the second conductive pattern 32b, the back surface 30b of the insulating layer 30 has the same shape as the first conductive pattern 32b and is symmetrical to each other with respect to the insulating layer 30. A conductive pattern that is a spiral (or right-angled spiral) may be formed.

(c) of FIG. 2 shows a second FPCB (F2) stacked on the back or front of the first FPCB (F1) instead of (b) of FIG. 2, and the induction heating element is stacked on the first FPCB (F1) and a second FPCB (F2).

The second FPCB (F2) is made of a flexible material and includes a flat insulating layer 40 (eg, polyimide film). On the front surface 40a of the insulating layer 40 of the second FPCB (F2), the fifth electrical contact 44a electrically connected to the second terminal of the inverter element (not shown), and the second electrical contact 34b A sixth electrical contact 44b electrically connected, and a third conductive pattern 42 electrically connecting the fifth electrical contact 44a and the sixth electrical contact 44b are provided.

Each of the second electrical contact 34b and the sixth electrical contact 44b is electrically connected to each other through a through hole of the insulating layer 40 .

The first conductive pattern 32a and the third conductive pattern 42 are electrically insulated by the insulating layer 30 or 40 .

The induction heating element (H) according to the present invention includes only the first FPCB (F1) or includes first and second FPCBs (F1) and (F2) having a laminated structure.

In another embodiment, the induction heating element (H) is in addition to the stacked first FPCB (F1) and second FPCB (F2) in (a) and (c) of FIG. 2 described above, the first FPCB (F1 ), at least one first FPCB is additionally stacked on the top, the second electrical contacts are electrically connected to the sixth electrical contact 44b through the through hole, and the first electrical contacts are also electrically connected to the first terminal of the inverter element. may be connected to

In the present invention, the conductive pattern and the electrical wire are made of copper or constantan, and the electrical contact surrounded by the conductive pattern may be formed as a heater pad.

FIG. 3 is a conceptual perspective view of a heating unit equipped with the induction heating element of FIG. 2 . In FIG. 3 , each of the first and second induction heating elements H1 and H2 has the same structure as the induction heating element H of FIG. 2 . In FIG. 3, the first and second induction heating elements H1 and H2 are used, but only one induction heating element H may be mounted.

The heating unit HU1 includes a heater pipe HP, first and second induction heating elements H1 and H2 surrounding the heater pipe HP, and a heating space HS within the heater pipe HP. It is configured to include a susceptor (IS-1) to be positioned.

The heater pipe HP is hollow inside and has a heating space HS, and has a circular cross section or a polygonal column shape. An aerosol-forming article (eg, cigarette, etc.) may be inserted into and separated from the heating space HS. The heater pipe HP also performs a bobbin function for fixing the first and second induction heating elements H1 and H2. The heater pipe HP is made of a material having excellent thermal conductivity in order to heat the heating space HS by heat conduction when each of the first and second induction heating elements H1 and H2 generates heat. In addition, the heater pipe HP may include a ferromagnetic material for induction heating.

The first and second induction heating elements H1 and H2 are mounted on the outer surface of the heater pipe HP or are spaced apart from each other at regular intervals. As shown in FIG. 3 , each of the first and second induction heating elements H1 and H2 is symmetrically disposed with respect to the central axis of the heater pipe HP.

The susceptor IS-1 is inserted into the heating space HS and mounted to be spaced apart from each other by the same distance as the first and second induction heating elements H1 and H2. The shape of the susceptor (IS-1) may have a bee needle shape or a cylindrical shape. The susceptor (IS-1) is made of materials such as SPCE, SUS, and aluminum that can be heated by induction.

The induction heating device may include first and second inverter elements connected to the first and second induction heating elements H1 and H2, respectively. In this case, the data processor is configured to use the first and second inverter elements Since each can be controlled, the induction heating function of each of the first and second induction heating elements H1 and H2 can be independently controlled. Alternatively, in the induction heating device, one inverter element may be electrically connected to each of the first and second induction heating elements H1 and H2 to apply AC power.

In the present invention, each of the first and second induction heating elements H1 and H2 generates an alternating magnetic field when AC power (current) is applied to the susceptor IS-1 or the heater pipe HP ( It performs the function of induction heating (or heat generation) in case of including ferromagnetic material). In addition, when AC power is applied to each of the first and second induction heating elements H1 and H2, resistance heating is performed by their own resistance, so that heat (thermal energy) generated by the resistance heating passes through the heater pipe. It is supplied or delivered to the heating space HS.

FIG. 4 is temperature graphs for each position of the induction heating device to which the heating unit of FIG. 2 is mounted.

The temperature of the susceptor IS-1 when the induction heating device applies power to the heating unit, the temperature of the heater pipe HP, and the first conductive pattern 32a (ie, the first and second induction heating elements ( The temperatures of H1) and (H2)) are shown in FIG. 4 .

By induction heating and resistance heating, the temperature of the susceptor (IS-1) is the highest, and the temperature of the heater pipe (HP) is slightly higher than that of the first and second induction heating elements (H1) and (H2). that is confirmed Due to this temperature distribution, the heating of the inside of the aerosol-forming article by the heat of the susceptor IS-1 and the heating of the outside of the aerosol-forming article by the heat conduction of the heater pipe HP can be performed simultaneously or together. there is.

5 is plan views of a second embodiment of an induction heating element including an FPCB according to the present invention.

5 shows a third FPCB (F3) included in the third induction heating element (H3).

The third FPCB (F3) is a flexible material and has a flat insulating layer 50 (eg, polyimide film, etc.) and a plurality of conductive patterns 52 extending in a straight line parallel to the entire surface of the insulating layer 50 ).

The third induction heating element H3 (or the third FPCB (F3)) is close to the one end 51a of the insulating layer 50 and electrically connects one end of each of the plurality of conductive patterns 52 to the first electric The second electrical contact 54b electrically connects the contact 54a and the other end 51b of the insulating layer 50 to the other end of each of the plurality of conductive patterns 52 in proximity to the second electrical contact 54b. By electrically connecting the first and second electrical contacts 54a and 54b and the conductive patterns 52, the plurality of conductive patterns 52 are electrically connected in parallel with each other. The first electrical contact 54a is electrically connected to the first terminal of the inverter element by an electrical wire (not shown), and the second electrical contact 54b is electrically connected to the second terminal of the inverter element by an electrical wire. do. Openings 55a and 55b are formed in the central regions of the first and second electrical contacts 54a and 54b, respectively, and electrical wires connected to the first and second electrical contacts 54a and 54b, respectively. They extend through the openings 55a and 55b and are connected to the first and second terminals of the inverter element, respectively.

Also, the third induction heating element H3 may include one third FPCB (F3), but may include a plurality of third FPCBs (F3) vertically stacked and insulated from each other. The electrical connection between the plurality of conductive patterns 52 formed on each of the plurality of third FPCBs (F3) or the electrical connection between the plurality of first electrical contacts 54a and the electrical connection between the plurality of second electrical contacts 54b To this end, a plurality of through holes 56 and 57 are provided through the plurality of insulating layers 50, and electrical connections between the plurality of through holes 56 and 57 are made. By this electrical connection, the plurality of conductive patterns 52 in the plurality of third FPCBs F3 are electrically connected to each other in parallel.

FIG. 6 is a conceptual perspective view of a heating unit equipped with the induction heating element of FIG. 5 .

The heating unit HU2 includes a heater pipe HP, a third induction heating element H3 wrapped around the heater pipe HP in a spiral shape or wound around the heater pipe HP, and heating within the heater pipe HP. It is configured to include a susceptor (IS-2) located in the space (HS).

The heater pipe HP has a heating space HS formed therein and has a circular cross section or a polygonal column shape. An aerosol-forming article (eg, cigarette, etc.) may be inserted into and separated from the heating space HS. The heater pipe HP also performs a bobbin function for fixing the third induction heating element H3. The heater pipe HP is made of a material with excellent thermal conductivity in order to heat the heating space HS by heat conduction when each of the third induction heating elements H3 generates heat. In addition, the heater pipe HP may include a ferromagnetic material for induction heating.

The third induction heating element (H3) is spirally wrapped around the central axis of the heater pipe (HP), spirally wound from the bottom of the outer surface of the heater pipe (HP) to the top of the outer surface of the heater pipe (HP), It is mounted on the heater pipe (HP). The third FPCB (F3) of the third induction heating element (H3) is wound around the heater pipe (HP) at least once. As shown, the third induction heating element H3 may be wound around the heater pipe HP so as not to overlap each other, or may be partially overlapped and wound. The third induction heating element H3 wound around the heater pipe HP corresponds to a solenoid structure.

The susceptor IS-2 is inserted into the heating space HS and mounted to be spaced apart from the third induction heating element H3 by a predetermined distance. The shape of the susceptor (IS-2) may have a bee needle shape or a cylindrical shape. The susceptor (IS-2) is made of materials such as SPCE, SUS, and aluminum that can be heated by induction.

The induction heating device includes an inverter element connected to the third induction heating element H3, and may be electrically connected to the third induction heating element H3 to apply AC power.

In the present invention, the third induction heating element (H3) generates an alternating magnetic field when AC power (current) is applied to the susceptor (IS-2) or the heater pipe (HP) (if it includes a ferromagnetic material) In addition to the function of induction heating, resistance heating is performed by its own resistance to supply heat to the heating space HS through the heater pipe.

As described above, the present invention is not limited to the specific preferred embodiments described above, and anyone having ordinary knowledge in the technical field to which the present invention pertains can do various things without departing from the gist of the present invention claimed in the claims. Of course, variations are possible, and such variations are within the scope of the claims.

30, 40, 50: insulating layer

Claims (10)

a heater pipe having a heating space and accommodating an aerosol-forming article in the heating space;
a susceptor made of a ferromagnetic material formed in the heating space of the heater pipe;
A first insulating layer wrapped around the heater pipe or wound around the heater pipe and mounted or disposed on the outside of the heater pipe, and a first conductive pattern spirally extending around a certain point on the front surface of the first insulating layer, or the first insulating layer. an induction heating element including at least one FPCB having a plurality of parallel conductive patterns parallel to each other and spirally extending around the central axis of the heater pipe on the front surface of the layer;
An induction heating device using an FPCB, characterized in that it comprises an inverter element for applying AC power to the induction heating element. According to claim 1,
The heater pipe is a thermally conductive material,
The induction heating element generates an alternating magnetic field when AC power is applied to enable induction heating in the susceptor, and the heat generated by the resistance heating of the induction heating element is supplied to the heating space of the heater pipe through the heater pipe. Induction heating device using FPCB to be. According to claim 1 or 2,
Induction heating device using FPCB, characterized in that the heater pipe is a ferromagnetic material. According to claim 1,
At least one FPCB includes a first conductive pattern formed in a spiral shape on the entire surface of the first insulating layer, a first electrical contact formed on one end of the first conductive pattern and electrically connected to the first terminal of the inverter element, and the first conductive pattern. A second electrical contact formed on the other end of the first insulating layer, a third electrical contact electrically connected to the second terminal of the inverter element on the rear surface of the first insulating layer, a fourth electrical contact electrically connected to the second electrical contact, and a third electrical contact electrically connected to the second electrical contact. An induction heating device using an FPCB, characterized in that it comprises a first FPCB having a second conductive pattern electrically connecting the electrical contact and the fourth electrical contact. According to claim 1,
At least one FPCB includes a first conductive pattern formed in a spiral shape on the entire surface of the first insulating layer, a first electrical contact formed on one end of the first conductive pattern and electrically connected to the first terminal of the first inverter element, and a first A first FPCB having a second electrical contact formed on the other end of the conductive pattern;
A fifth electrical contact electrically connected to the second terminal of the first inverter element on the entire surface of the second insulating layer, a sixth electrical contact electrically connected to the second electrical contact, the fifth electrical contact and the sixth electrical contact A second FPCB having a third conductive pattern electrically connected thereto;
The induction heating device using the FPCB, characterized in that the first FPCB and the second FPCB are laminated. According to claim 4 or 5,
At least one FPCB is an induction heating device using an FPCB, characterized in that it comprises a structure in which a plurality of first FPCBs are stacked. According to claim 1,
The induction heating element is spirally wrapped around the central axis of the heater pipe, spirally wound from the bottom of the outer surface of the heater pipe to the top of the outer surface of the heater pipe, and is mounted on the heater pipe Induction heating using FPCB, characterized in that Device. According to claim 7,
The induction heating element includes a first electrical contact electrically connecting one end of each of the plurality of conductive patterns and a second electrical contact electrically connecting the other end of each of the plurality of conductive patterns,
The first electrical contact is electrically connected to the first terminal of the inverter element, and the second electrical contact is induction heating device using an FPCB, characterized in that electrically connected to the second terminal of the inverter element. According to claim 8,
An induction heating device using an FPCB, characterized in that the induction heating element includes a plurality of stacked FPCBs. According to claim 1,
Induction heating device using an FPCB, characterized in that the first conductive pattern and the parallel conductive pattern are made of copper or constantan.

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