KR102560312B1 - Induction heating device having improved wire harness structure - Google Patents

Abstract

The present invention relates to an induction heating device having an improved wire harness structure. In addition, the induction heating device according to an embodiment of the present invention is coupled to the top of the case, the cover plate having an input interface on the top surface to receive input from the user, the first and second working coils provided inside the case to heat the heating object disposed on the top surface of the cover plate, the first and second sensors respectively detecting the temperature of the first and second working coils, disposed below the first and second working coils, a plurality of light emitting elements are installed, and are communicatively connected to the first and second sensors Including a main control unit that receives an input provided by a user from an indicator substrate and an input interface on which an indicator control unit is installed, and is communicatively connected to the indicator control unit, wherein the first and second sensors respectively detect information about the temperature of the first and second working coils is transmitted to the main control unit through the indicator control unit.

Description

Induction heating device with improved wire harness structure {INDUCTION HEATING DEVICE HAVING IMPROVED WIRE HARNESS STRUCTURE}

The present invention relates to an induction heating device having an improved wire harness structure.

BACKGROUND OF THE INVENTION Various types of cooking utensils for heating food at home or in restaurants are being used. Conventionally, gas ranges using gas as fuel have been widely used, but recently, devices for heating a heating target object, for example, a cooking vessel such as a pot, using electricity without using gas have been spread.

A method of heating an object to be heated using electricity is largely divided into a resistance heating method and an induction heating method. The electric resistance method is a method of heating an object to be heated by transferring heat generated when an electric current flows through a metal resistance wire or a non-metallic heating element such as silicon carbide to the object to be heated (eg, a cooking vessel) through radiation or conduction. The induction heating method is a method in which an eddy current is generated in an object to be heated made of a metal component 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 itself is heated.

Among them, an induction heating device to which an induction heating method is applied generally includes a working coil in a corresponding region to heat each of a plurality of objects to be heated (eg, a cooking vessel).

However, in recent years, an induction heating device (ie, a zone-free induction heating device) that simultaneously heats one object with a plurality of working coils has been widely used. In the case of such a John-free type induction heating device, in an area where a plurality of working coils exist, an object to be heated may be induction heated regardless of the size and position of the object to be heated.

In addition, in the zone-free induction heating device, a sensor for detecting the temperature of the corresponding working coil is installed for each working coil, and each sensor must be connected to the main control unit (ie, the control unit for the input interface) through a wire harness. Referring to FIGS. 1 and 2, let's take a look at the conventional induction heating device.

1 and 2 are schematic diagrams for explaining the structure of a wire harness of a conventional induction heating device.

Referring to FIGS. 1 and 2 , a conventional induction heating device includes a plurality of sensors (S1 to Sn; n is a natural number of 2 or more) to sense the temperature of each of a plurality of working coils.

In addition, information about the temperature of the working coil detected by the plurality of sensors S1 to Sn is first transmitted to the main control unit 310 'installed on the input interface board 310 for controlling the induction heating device (for example, lowering the output of the working coil when the temperature of the working coil is high). In addition, information on the temperature of the working coil transmitted to the main control unit 310 'is transmitted to the inverter control unit 400' installed on the inverter board 400, so that the inverter control unit 400' controls driving of the inverter unit (not shown). When controlling, information on the temperature of the working coil can be referred to.

However, as shown in FIG. 2, when all of the plurality of sensors S1 to Sn are separately connected to the main control unit 310 'installed on the input interface board 310 through wire harnesses WH1 to WHn, numerous wire harnesses are required, resulting in an increase in manufacturing cost.

In addition, as numerous wire harnesses are tangled, a problem of damaging the wire also occurs, and as a result, the problem of poor wire quality increases.

In addition, it is difficult to connect and assemble the wire harness itself, and it is difficult to secure a circuit arrangement area inside the induction heating device. Furthermore, since it is difficult to secure a circuit arrangement area, there is also a problem in that productivity is lowered due to an increase in circuit design difficulty.

An object of the present invention is to provide an induction heating apparatus having an improved wire harness structure.

Another object of the present invention is to provide an induction heating device with an improved internal communication method.

The objects of the present invention are not limited to the above-mentioned objects, and other objects and advantages of the present invention not mentioned above can be understood by the following description and will be more clearly understood by the examples of the present invention. It will also be readily apparent that the objects and advantages of the present invention may be realized by means of the instrumentalities and combinations indicated in the claims.

The induction heating apparatus according to the present invention includes an indicator board disposed below a working coil and provided with an indicator control unit communicatively connected to a plurality of sensors, and a main control unit communicatively connected to the indicator control unit. The wire harness structure can be improved.

In addition, the induction heating apparatus according to the present invention includes an indicator control unit communicating with the main control unit in an I2C (Inter Integrated Circuit) method, and an inverter control unit communicating with the main control unit in a UART (Universal Asynchronous Receiver/Transmitter) method. The internal communication method can be improved.

The induction heating device according to the present invention can improve the wire harness structure, making it easy to connect and assemble the wire harness, and accordingly, it is easy to secure a circuit arrangement area inside the induction heating device. Furthermore, since circuit design difficulty can be reduced by securing a circuit arrangement area, productivity can also be improved. In addition, since the number of required wire harnesses can be reduced by improving the structure of the wire harness, manufacturing cost can be reduced. In addition, the problem of wire damage due to entanglement between wire harnesses can be prevented by improving the structure of the wire harness, and thus the problem of poor wire quality can be solved.

In addition, the induction heating apparatus according to the present invention can improve communication efficiency between controllers by improving an internal communication method. Furthermore, product reliability can be improved by improving communication efficiency between control units.

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

1 and 2 are schematic diagrams for explaining the structure of a wire harness of a conventional induction heating device.
3 is a plan view illustrating an induction heating apparatus according to an embodiment of the present invention.
4 is a partial perspective view illustrating the induction heating device of FIG. 3;
5 and 6 are partially enlarged views of the induction heating device of FIG. 4 .
Figure 7 is a partial cross-sectional view of the induction heating device of Figure 4;
8 is a partially enlarged view of FIG. 7 .
9 is a block diagram illustrating a control flow of the induction heating apparatus of FIG. 3 .
10 and 11 are schematic diagrams for explaining the wire harness structure of the induction heating device of FIG. 3 .

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to indicate the same or similar components.

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

3 is a plan view illustrating an induction heating apparatus according to an embodiment of the present invention. 4 is a partial perspective view illustrating the induction heating device of FIG. 3; 5 and 6 are partially enlarged views of the induction heating device of FIG. 4 . Figure 7 is a partial cross-sectional view of the induction heating device of Figure 4; 8 is a partially enlarged view of FIG. 7 .

For reference, FIG. 4 is a view in which some components (eg, an input interface and some working coil assemblies) of the induction heating apparatus 1 of FIG. 3 are omitted for convenience of description, and FIG. 6 is a diagram in which some components (eg, some light guides) of the induction heating apparatus 1 of FIG. 4 are omitted for convenience of description.

3 to 8, the induction heating apparatus 1 according to an embodiment of the present invention includes a case 125, a cover plate 119, a base plate 145, an indicator substrate support 170, an indicator substrate 175, a light emitting element 177, a light guide body 210, a blowing fan 230, an input interface 300, an input interface substrate 310, a working coil assembly (WCA), and the like. can include

Various parts constituting the induction heating device 1, such as a working coil assembly (WCA), a base plate 145, an indicator board support 170, an indicator board 175, a light emitting element 177, a light guide 210, a blowing fan 230, and an input interface board 310, may be installed in the case 125.

In addition, the case 125 includes various devices related to driving the working coil WC (e.g., a power supply unit providing AC power, a rectifier unit rectifying the AC power of the power supply unit to DC power, an inverter unit (IV in FIG. 9) converting the DC power rectified by the rectification unit into resonance current through a switching operation and providing it to the working coil (WC), an inverter control unit (IV in FIG. A relay or semiconductor switch for turning on or off (WC) may be installed, but a detailed description thereof will be omitted.

For reference, the case 125 may be insulated to prevent heat generated by the working coil WC from leaking to the outside.

The cover plate 119 is coupled to the top of the case 125 to shield the inside of the case 125, and an object to be heated (not shown) may be disposed on the top surface.

Specifically, the cover plate 119 may include an upper plate portion 115 (that is, an upper surface of the cover plate 119) for placing an object to be heated such as a cooking container, and heat generated in the working coil WC may be transferred to the object to be heated through the upper plate portion 115.

Here, the upper plate portion 115 may be made of, for example, a glass material, and the upper plate portion 115 may include an input interface 300 that receives an input from a user and transmits the corresponding input to the main controller 310', but is not limited thereto. That is, the input interface 300 may be provided at a location other than the upper plate portion 15 .

Here, the input interface 300 is a module for inputting the heating intensity desired by the user or the operating time of the induction heating apparatus 1, and may be variously implemented as a physical button or a touch panel. Also, the input interface 300 may include, for example, a power button, a lock button, power level control buttons (+, -), timer control buttons (+, -), and a charging mode button.

For reference, the input interface 300 is controlled by a main control unit (310' in FIG. 9) installed on the input interface board 310, and may transfer an input received from a user to the main control unit (310' in FIG. 9).

In addition, the main control unit (310' in FIG. 9) may transfer the input to at least one of the inverter control unit (400' in FIG. 9) described above and the indicator control unit (175' in FIG. 9) described later. In addition, the main control unit (310' in FIG. 9) may be communicatively connected to an inverter control unit (400' in FIG. 9) and an indicator control unit (175' in FIG. 9) to be described later, which will be described in detail later.

Meanwhile, the working coil assembly WCA may include the working coil WC, the ferrite core 126, and the mica sheet 120 (ie, the first mica sheet), and may be installed on the base plate 145.

For reference, when the induction heating apparatus 1 is a zone-free type induction heating apparatus, a plurality of working coil assemblies (WCA) may exist as shown in FIGS.

However, for convenience of description, one working coil assembly (WCA) will be described as an example.

Specifically, the working coil WC may be formed of a wire wound in an annular shape many times, and may generate an alternating magnetic field. In addition, the mica sheet 120 and the ferrite core 126 may be sequentially disposed below the working coil WC.

In addition, the ferrite core 126 may be disposed on the lower side of the working coil WC, and a core hole (not shown) may be formed at the center thereof so as to overlap the annular inner side of the working coil WC in a vertical direction.

Specifically, the base plate 145 may be disposed below the ferrite core 126, and the mica sheet 120 may be disposed between the ferrite core 126 and the working coil WC.

In addition, the ferrite core 126 may be fixed to the mica sheet 120 through a sealant, and may serve to diffuse an alternating magnetic field generated from the working coil WC.

And, as shown in FIGS. 5 and 6, a packing gasket 149 is fastened to the core hole so that the ferrite core 126 can be fixed to the base plate 145, and the sensor S can be installed on top of the packing gasket 149. That is, the sensor S may be installed inside the annular shape of the working coil WC.

For reference, the sensor S may detect the temperature of the working coil WC. Of course, the sensor S may also detect the temperature of the upper plate 115 or the operation of the working coil WC, but in one embodiment of the present invention, the sensor S detects the temperature of the working coil WC. It will be described as an example.

In addition, the sensor S may sense the temperature of the working coil WC and transmit the sensed temperature information to an indicator controller (175' in FIG. 9) to be described later, which will be described in detail later.

The mica sheet 120 (that is, the first mica sheet) is disposed between the working coil WC and the ferrite core 126, and a sheet hole (not shown) may be formed at the center thereof to overlap the annular inner side of the working coil WC in the vertical direction.

Specifically, the mica sheet 120 may be fixed to the working coil WC and the ferrite core 126 through a sealant, and heat generated by the working coil WC may be directly transferred to the ferrite core 126. Can be prevented.

For reference, although not shown in the drawing, the induction heating apparatus 1 is fixed to the top of the working coil WC through a sealant and overlaps the annular inner side of the working coil WC in a vertical direction at the center. A second mica sheet (not shown) having a second sheet hole (not shown) may be further included.

A working coil assembly (WCA) is installed on the base plate 145 .

Specifically, the ferrite core 126, the mica sheet 120, and the working coil WC are sequentially stacked and installed on the base plate 145, and the base plate 145 is upward from the indicator substrate 175 (ie, it may be arranged to be spaced apart from one of the vertical directions). That is, the indicator substrate 175 may be disposed below the base plate 145 to be spaced apart from the base plate 145 .

Accordingly, an air passage is formed between the base plate 145 and the indicator substrate 175, and cold air circulation is possible through the air passage, so that the temperature of the working coil WC and the light emitting element 177 can be reduced.

For reference, as shown in FIG. 7 , a blowing fan 230 may be installed at the lower end of one side of the case 125, and cold air sucked from the outside by the blowing fan 230 may be blown into the aforementioned air flow path.

Also, as shown in FIGS. 5 and 6 , a connection hole 172 may be formed in a space between the ferrite cores of the base plate 145 to secure a space for the connection part 171 . Here, the connection part 171 may be installed to protrude from the indicator substrate 175 for arranging the wires and electrically connecting the working coil WC. That is, the connecting part 171 may be connected to a wire of a working coil disposed around it.

In addition, the base plate 145 may be integrally formed, for example, and made of aluminum (Al), but is not limited thereto.

In addition, the light guide 210 may be installed on the base plate 145 .

Specifically, the light guide 210 may be installed on the base plate 145 to be provided around the working coil WC. That is, four light guides (eg, 210) per working coil WC may be installed around the corresponding working coil WC.

In addition, as shown in FIGS. 5 and 6 , a light guide member installation hole 147 for installing the light guide member 210 may be formed in a space between ferrite cores in the base plate 145 . That is, the light guide member installation hole 147 may be formed in the base plate 145 along the location where the light guide member 210 is installed. Accordingly, the light guide installation hole 147 may also be formed around the working coil WC, and four light guide installation holes (for example, 147) per working coil WC may be formed around the corresponding working coil WC.

Of course, the light guide member installation holes 147 may be formed so as not to overlap with the connection hole 172 , and the number of light guide member installation holes 147 may be the same as the number of light guide members 210 .

For reference, light emitted from the light emitting device 177 installed on the indicator substrate 175 may be transmitted to the light guide member 210 through the light guide member installation hole 147 .

The indicator substrate 175 may be disposed below the base plate 145 to be spaced apart from the base plate 145 , and a plurality of light emitting devices (eg, 177 ) may be installed.

Specifically, the indicator substrate 175 may be installed on the indicator substrate support 170 to be spaced downward from the base plate 145 (ie, in another direction among vertical directions). A plurality of light emitting elements (eg, 177) may be installed on the indicator substrate 175, and the plurality of light emitting elements (eg, 177) may be, for example, Light Emitting Diodes (LEDs).

For reference, the indicator substrate 175 may be implemented in the form of, for example, a PCB (ie, printed circuit board), and whether or not the working coil WC is driven through a plurality of light emitting elements (eg, 177) And the heating intensity (ie, thermal power) It can be displayed. Also, although not shown in the drawing, various components for driving a plurality of light emitting elements (eg, 177) may be further installed on the indicator substrate 175 .

In addition, an indicator control unit (175' in FIG. 9) communicatively connected to the sensor S may be installed on the indicator board 175, which will be described in detail later.

An indicator substrate 175 may be installed on the indicator substrate support 170 .

Specifically, the indicator substrate support 170 may be disposed below the indicator substrate 175 to support the indicator substrate 175 .

The light guide 210 is installed on the base plate 145 so as to be provided around the working coil WC, and can display whether the working coil WC is driven and output intensity through the light emitting surface 214 .

In addition, as described above, four light guides (e.g., 210) per working coil WC may be installed around the corresponding working coil WC, and each light guide member 210 may be installed in each light guide installation hole 147 formed in the base plate 145.

In addition, the light guide 210 may be disposed above the light emitting element 177 to display light emitted from the light emitting element 177 through the light emitting surface 214 at the top.

On the other hand, the induction heating apparatus 1 according to an embodiment of the present invention may also have a wireless power transmission function based on the above-described configuration and characteristics.

That is, recently, a technology for supplying power wirelessly has been developed and applied to many electronic devices. Electronic devices with wireless power transmission technology can charge their batteries simply by placing them on a charging pad without connecting a separate charging connector. An electronic device to which wireless power transmission is applied has advantages in that it does not require a wired cord or a charger, so portability is improved and its size and weight are reduced compared to the prior art.

These wireless power transfer technologies include an electromagnetic induction method using a coil, a resonance method using resonance, and a radio wave radiation method in which electrical energy is converted into microwaves and transmitted. Among them, the electromagnetic induction method uses electromagnetic induction between a primary coil (eg, a working coil (WC)) provided in a device for transmitting wireless power and a secondary coil provided in a device for receiving wireless power. It is a technology for transmitting power.

Of course, the principle of the induction heating method of the induction heating device 1 is substantially the same as that of the wireless power transmission technology by electromagnetic induction in that the object to be heated is heated by electromagnetic induction.

Therefore, even in the case of the induction heating device 1 according to an embodiment of the present invention, a wireless power transmission function as well as an induction heating function may be mounted. Furthermore, the induction heating mode or the wireless power transmission mode may be controlled by the main controller (310′ in FIG. 9 ), so that the induction heating function or the wireless power transmission function can be selectively used as needed.

As such, the induction heating apparatus 1 according to an embodiment of the present invention has the above-described configuration and characteristics, and hereinafter, the above-described control unit (main control unit, inverter control unit, indicator control unit) and sensor (S) will be described in detail.

9 is a block diagram illustrating a control flow of the induction heating apparatus of FIG. 3 . 10 and 11 are schematic diagrams for explaining the wire harness structure of the induction heating device of FIG. 3 .

For reference, the description will be made on the premise that each of the working coil WC, the sensor S, and the light emitting element 177 shown in FIG. 9 may be configured in plurality.

First, referring to FIG. 9 , the induction heating apparatus 1 according to an embodiment of the present invention may include a main controller 310', an inverter controller 400', and an indicator controller 175'.

The main control unit 310' may receive an input provided by a user from the input interface 300 and be communicatively connected to the indicator control unit 175' and the inverter control unit 400'.

Specifically, since the main control unit 310 'is connected to the indicator control unit 175' through a wire harness, information about the temperature of the working coil WC detected by the sensor S can be provided from the indicator control unit 175'.

In addition, since the main control unit 310' is connected to the inverter control unit 400' through a wire harness, information about the temperature of the working coil WC received from the indicator control unit 175' can be provided to the inverter control unit 400'.

In addition, the main control unit 310' may transmit the input (ie, user input) provided from the input interface 300 to at least one of the indicator control unit 175' and the inverter control unit 400'.

For reference, the main controller 310 ′ can control driving of the input interface 300 (eg, a screen UI displayed on the input interface 300 ).

In addition, the main control unit 310 ′ may be installed inside the case ( 125 in FIG. 3 ) to be spaced apart from the indicator substrate 175 (eg, spaced downward from the indicator substrate 175 ). That is, the main control unit 310' may be installed on the input interface board 310 provided inside the case (125 in FIG. 3).

Here, the input interface board 310 may be implemented in the form of, for example, a PCB (ie, a printed circuit board). In addition, although not shown in the drawings, various parts related to driving control of the input interface 300 may be further installed on the input interface board 310 other than the main control unit 310'.

Meanwhile, the inverter control unit 400' controls driving of the inverter unit IV and may be communicatively connected to the main control unit 310'.

Specifically, the inverter control unit 400' is connected to the main control unit 310' through a wire harness, and may receive information about the temperature of the working coil WC from the main control unit 310'. In addition, the inverter control unit 400' can control driving of the inverter unit IV based on the information about the temperature of the working coil WC provided from the main control unit 310'.

For example, when the temperature of the working coil WC is high, the inverter control unit 400 ′ may lower the output of the inverter unit IV.

For reference, the inverter unit IV may apply the resonance current to only one working coil or to a plurality of working coils depending on the connection state (one-to-one connection or one-to-many connection) with the working coil.

In addition, the inverter control unit 400' may communicate with the main control unit 310' in a universal asynchronous receiver/transmitter (UART) method, but is not limited thereto.

In addition, the inverter controller 400' may receive an input (ie, a user input) from the main controller 310', and may control driving of the inverter unit IV based on the received input.

For example, when a user provides an input related to starting driving of the working coil WC through the input interface 300, the main control unit 310' may receive the corresponding input from the input interface 300 and provide the input to the inverter control unit 400', and the inverter control unit 400' may start driving the working coil WC by starting driving the inverter unit IV based on the input provided from the main control unit 310'.

In addition, the inverter control unit 400 ′ may be installed on the inverter substrate 400 provided inside the case ( 125 in FIG. 3 ).

Here, the inverter board 400 may be implemented in the form of, for example, a PCB (ie, a printed circuit board). In addition, although not shown in the drawing, various components related to drive control of the inverter unit IV other than the inverter control unit 400' may be further installed on the inverter substrate 400. Of course, the inverter unit IV may also be installed on the inverter board 400 .

Meanwhile, the indicator controller 175' may be communicatively connected to the sensor S and the main controller 310'.

Specifically, since the indicator controller 175' is connected to the sensor S through a wire harness, it may receive information about the temperature of the working coil WC from the sensor S. In addition, since the indicator controller 175' is connected to the main controller 310' through a wire harness, information about the temperature of the working coil WC provided from the sensor S can be transmitted to the main controller 310'.

For reference, the number of sensors S may be plural (that is, provided according to the number of working coils), and the indicator controller 175' may be connected to the plurality of sensors through separate wire harnesses. Details on this will be described later.

Also, the indicator control unit 175' may communicate with the main control unit 310' in an I2C (Inter Integrated Circuit) method, but is not limited thereto.

In addition, the indicator controller 175 ′ may be installed on the indicator substrate 175 .

Specifically, the indicator substrate 175 may be disposed on the lower side of the working coil WC (that is, the lower side of the base plate (145 in FIG. 3)), and the light emitting element 177 (that is, a plurality of light emitting elements) may be installed on the indicator substrate 175.

In addition, the indicator controller 175' can receive an input (ie, a user input) from the main controller 310', and can control driving of the light emitting element 177 based on the input received from the main controller 310'.

For example, when a user provides an input related to starting driving of the light emitting element 177 through the input interface 300, the main control unit 310' receives the corresponding input from the input interface 300 and provides it to the indicator control unit 175'.

For reference, the inverter control unit 400' may transmit information related to driving of the inverter unit IV to the main control unit 310', and the main control unit 310' may transmit information related to driving of the inverter unit IV received from the inverter control unit 400' to the indicator control unit 175'.

In this case, the indicator controller 175' can control driving of the light emitting element 177 based on information related to driving of the inverter unit IV provided from the main controller 310'.

Accordingly, the light emitting element 177 can be driven according to the drive of the inverter unit IV (ie, the drive of the working coil WC).

In this way, each of the controllers (i.e., the indicator controller 175', the main controller 310', and the inverter controller 400') communicates or operates through the above-described method. Referring to FIGS. 10 and 11, the connection structure between the indicator controller 175' and the sensor S will be examined.

Specifically, referring to FIGS. 10 and 11, a plurality of sensors (S1 to Sn; each sensor is provided for each working coil) may be connected to an indicator control unit 175 'installed on an indicator substrate 175 through wire harnesses WH1' to WHn', respectively.

Accordingly, the indicator controller 175 ′ may collect information (ie, data) about the temperature of the working coil detected by the plurality of sensors S1 to Sn.

Also, the indicator controller 175' may be connected to the main controller 310' through a separate wire harness WH''.

Accordingly, information on the temperature of each working coil collected by the indicator controller 175' may be transmitted to the main controller 310'.

That is, the plurality of sensors S1 to Sn are connected to the indicator control unit 175' located closer than the main control unit 310' through the wire harnesses WH1' to WHn', thereby indirectly connecting to the main control unit 310'.

Meanwhile, the lengths of the wire harnesses WH1' to WHn' used to connect the plurality of sensors S1 to Sn and the indicator controller 175' may be shorter than the lengths of the wire harnesses WH1 to WHn used to connect the plurality of sensors S1 to Sn and the input interface board 310 (ie, the main controller) shown in FIG.

In addition, the wire harness WH″ used for connection between the indicator controller 175' and the main controller 310' may be a single wire harness.

Accordingly, unlike the prior art, in one embodiment of the present invention, the problem of many long wire harnesses getting entangled between the plurality of sensors S1 to Sn and the main control unit 310' can be solved, and connection and assembly of wire harnesses can also be facilitated.

As described above, the induction heating apparatus 1 according to an embodiment of the present invention can improve the wire harness structure, making it easy to connect and assemble the wire harness, and thereby secure the circuit arrangement area inside the induction heating apparatus 1. Furthermore, since circuit design difficulty can be reduced by securing a circuit arrangement area, productivity can also be improved. In addition, since the number of required wire harnesses can be reduced by improving the structure of the wire harness, manufacturing cost can be reduced. In addition, the problem of wire damage due to entanglement between wire harnesses can be prevented by improving the structure of the wire harness, and thus the problem of poor wire quality can be solved.

In addition, the induction heating apparatus 1 according to an embodiment of the present invention can improve communication efficiency between controllers by improving an internal communication method. Furthermore, product reliability can be improved by improving communication efficiency between control units.

The present invention described above is not limited by the above-described embodiments and accompanying drawings, since various substitutions, modifications, and changes are possible to those skilled in the art within the scope of the technical spirit of the present invention.

119: cover plate 120: mica sheet
125 case 126 ferrite core
145: base plate 170: indicator substrate support
175: indicator board 175': indicator control unit
177: light emitting element 210: light guide
230: blowing fan 300: input interface
310: input interface board 310': main controller
400: inverter substrate 400': inverter control unit
WC: Working Coil WCA: Working Coil Assembly
S: Sensor IV: Inverter

Claims (13)

a cover plate coupled to the top of the case and provided with an input interface on the top surface to receive input from a user;
first and second working coils provided inside the case to heat the object to be heated disposed on the upper surface of the cover plate;
first and second sensors respectively sensing temperatures of the first and second working coils;
an indicator substrate disposed under the first and second working coils, having a plurality of light emitting elements installed thereon, and having an indicator control unit communicatively connected to the first and second sensors; and
A main control unit receiving an input provided by the user from the input interface and communicatively connected to the indicator control unit,
Information on the temperatures of the first and second working coils respectively sensed by the first and second sensors is transmitted to the main controller through the indicator controller,
The main control unit is installed inside the case to be spaced apart from the indicator substrate,
The first sensor and the second sensor are connected in parallel to the indicator control unit by separate wire harnesses,
The main control unit is directly connected to the indicator control unit by a separate single wire harness.
induction heating device.
According to claim 1,
The first sensor is installed inside the annular shape of the first working coil,
The second sensor is installed inside the annular shape of the second working coil,
induction heating device.
According to claim 2,
The first sensor is connected to the indicator control unit through a first wire harness, the second sensor is connected to the indicator control unit through a second wire harness, and the main control unit is connected to the indicator control unit through a third wire harness,
The first to third wire harnesses are different wire harnesses
induction heating device.
According to claim 1,
an inverter unit performing a switching operation to apply a resonance current to at least one of the first and second working coils; and
Controlling the driving of the inverter unit and further comprising an inverter control unit communicatively connected to the main control unit
induction heating device.
According to claim 4,
The inverter control unit,
Receive information about the temperature of at least one of the first and second working coils from the main controller,
Controlling the driving of the inverter unit based on information about the temperature of at least one of the first and second working coils provided
induction heating device.
According to claim 4,
The main control unit transmits the input received from the input interface to at least one of the indicator control unit and the inverter control unit.
induction heating device.
According to claim 6,
The indicator control unit controls driving of the plurality of light emitting devices based on the input received from the main control unit,
The inverter control unit controls driving of the inverter unit based on the input received from the main control unit.
induction heating device.
According to claim 4,
The indicator control unit communicates with the main control unit in an I2C (Inter Integrated Circuit) method,
The inverter control unit communicates with the main control unit in a Universal Asynchronous Receiver/Transmitter (UART) method.
induction heating device.
According to claim 4,
The main control unit is installed on an input interface board provided inside the case,
The inverter control unit is installed on an inverter board provided inside the case
induction heating device.
According to claim 1,
a base plate on which the first and second working coils and the first and second sensors are installed and disposed above the indicator substrate to be spaced apart from the indicator substrate;
a light guide member installed on the base plate to be provided around the first working coil, disposed above the plurality of light emitting elements, and displaying whether the first working coil is driven and output intensity through a light emitting surface;
a ferrite core installed on the base plate to be disposed under the first working coil and diffusing an alternating magnetic field generated from the first working coil;
a mica sheet disposed between the first working coil and the ferrite core to prevent direct transfer of heat generated by the first working coil to the ferrite core; and
Further comprising an indicator substrate support on which the indicator substrate is installed
induction heating device.
According to claim 10,
A core hole is formed in the center of the ferrite core to overlap in the vertical direction with the annular inner side of the first working coil.
induction heating device.
According to claim 11,
A packing gasket is fastened to the core hole,
The first sensor is installed at the top of the packing gasket
induction heating device.
According to claim 10,
The mica sheet is fixed to the working coil and the ferrite core through a sealant.
induction heating device.