KR102676465B1 - Induction heating device having improved wire harness structure - Google Patents

Abstract

The present invention relates to an induction heating device with 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, has a cover plate equipped with an input interface on the top surface to receive input from the user, and heats a heating object disposed on the top surface of the cover plate. In order to do this, first and second working coils provided inside the case, first and second sensors for detecting the temperatures of the first and second working coils, respectively, are disposed on the lower side of the first and second working coils, and a plurality of A main control unit in which two light-emitting elements are installed, an indicator control unit communicatively connected to the first and second sensors is installed, receives input provided by the user from an indicator board and an input interface, and is communicatively connected to the indicator control unit, Information about the temperatures of the first and second working coils detected by the first and second sensors, respectively, 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 with an improved wire harness structure.

Various types of cooking appliances are used to heat food at home or in restaurants. Conventionally, gas ranges fueled by gas have been widely used, but recently, devices that heat objects to be heated, such as cooking vessels such as pots, using electricity rather than gas have been popularized.

Methods of heating a heated object using electricity are largely divided into resistance heating and induction heating. The electrical resistance method is a method of heating a heated object (for example, a cooking vessel) by transferring the heat generated when an electric current flows through a metal resistance wire or a non-metallic heating element such as silicon carbide to the heated object (for example, a cooking vessel) through radiation or conduction. The induction heating method uses the magnetic field generated around the coil when high-frequency power of a certain size is applied to the coil to generate an eddy current in the heated object made of metal, thereby heating the heated object itself. am.

Among these, an induction heating device using an induction heating method generally includes a working coil in each corresponding area to heat each of a plurality of heating objects (for example, a cooking vessel).

However, recently, induction heating devices that simultaneously heat one object with a plurality of working coils (i.e., zone free induction heating devices) have become widely used. In the case of this zone-free type induction heating device, the object to be heated can be inductively heated within the area where a plurality of working coils exist, regardless of the size and location of the object to be heated.

In addition, in the zone-free type induction heating device, a sensor is installed for each working coil to detect the temperature of the corresponding working coil, and each sensor must be connected to the main control unit (i.e., the control unit for the input interface) through a wire harness. , Let's look at a conventional induction heating device with reference to FIGS. 1 and 2.

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

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

In addition, information about the temperature of the working coil detected by the plurality of sensors (S1 to Sn) is used to control the induction heating device (for example, lower the output of the working coil when the temperature of the working coil is high) on the input interface board. It is first transmitted to the main control unit 310' installed in 310. And the information about 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' drives 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 the plurality of sensors (S1 to Sn) are all separately connected to the main control unit 310' installed on the input interface board 310 through wire harnesses (WH1 to WHn), As numerous wire harnesses are required, the problem of increased manufacturing costs arises.

In addition, as numerous wire harnesses become tangled, the problem of wire damage occurs, which increases the problem of poor wire quality.

In addition, connecting and assembling the wire harness itself becomes difficult, and it is difficult to secure the circuit layout area inside the induction heating device. Furthermore, since it is difficult to secure a circuit layout area, there is a problem that the difficulty of circuit design increases and productivity decreases.

An object of the present invention is to provide an induction heating device with 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 objects mentioned above, and other objects and advantages of the present invention that are not mentioned can be understood by the following description and will be more clearly understood by the examples of the present invention. Additionally, it will be readily apparent that the objects and advantages of the present invention can be realized by the means and combinations thereof indicated in the patent claims.

The induction heating device according to the present invention is disposed on the lower side of the working coil and includes an indicator board with an indicator control unit communicatively connected to a plurality of sensors and a main control unit communicatively connected to the indicator control unit to improve the wire harness structure. You can.

In addition, the induction heating device according to the present invention includes an indicator control unit that communicates with the main control unit in the I2C (Inter Integrated Circuit) method, and an inverter control unit that communicates with the main control unit in the UART (Universal asynchronous receiver/transmitter) method, thereby providing an internal communication method. It can be improved.

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

Additionally, the induction heating device according to the present invention can improve communication efficiency between control units by improving the internal communication method. Furthermore, product reliability can be improved by improving communication efficiency between control units.

In addition to the above-described effects, specific effects of the present invention are described below while explaining specific details for carrying out the invention.

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

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

Below, an induction heating device according to an embodiment of the present invention will be described.

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

For reference, FIG. 4 is a diagram omitting some components (e.g., input interface and some working coil assemblies, etc.) of the induction heating device 1 of FIG. 3 for convenience of explanation, and FIG. 6 is a diagram for convenience of explanation. For this reason, some components (eg, some light guides) of the induction heating device 1 of FIG. 4 are omitted.

3 to 8, the induction heating device 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, and an indicator substrate. (175), a light emitting element 177, a light guide 210, a blowing fan 230, an input interface 300, an input interface board 310, a working coil assembly (WCA), etc. may be included.

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

In addition, the case 125 includes various devices related to driving the working coil (WC) (e.g., a power supply unit that provides AC power, a rectifier unit that rectifies the AC power of the power supply unit into DC power, and a DC power rectified by the rectifier unit. An inverter unit (IV in FIG. 9) that converts the resonance current through a switching operation and provides it to the working coil (WC), an inverter control unit (400 in FIG. 9) that controls the inverter unit (IV in FIG. 9) and parts related to its driving. '), a relay or semiconductor switch that turns on or off the working coil (WC), etc.) may be installed, but 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 interior of the case 125, and a heating object (not shown) may be placed on the upper surface.

Specifically, the cover plate 119 may include an upper plate 115 (i.e., the upper surface of the cover plate 119) for placing a heating object, such as a cooking vessel, and the heat generated in the working coil WC is It can be transmitted to the object to be heated through the upper plate 115.

Here, the upper panel 115 may be made of, for example, a glass material, and the upper panel 115 is provided with an input interface 300 that receives input from the user and transmits the input to the main control unit 310'. It may be possible, but it is not limited to this. That is, the input interface 300 may be provided in a location other than the upper panel 15.

Here, the input interface 300 is a module for inputting the user's desired heating intensity or operating time of the induction heating device 1, and can be implemented in various ways using physical buttons, touch panels, etc. Additionally, the input interface 300 may be provided with, for example, a power button, a lock button, a power level control button (+, -), a timer control button (+, -), a charging mode button, etc.

For reference, the input interface 300 is controlled by the main control unit (310' in FIG. 9) installed on the input interface board 310, and can transmit the input provided by the user to the main control unit (310' in FIG. 9). .

Additionally, the main control unit (310' in FIG. 9) may transmit 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) to be described later. In addition, the main control unit (310' in FIG. 9) can be communicatively connected to the inverter control unit (400' in FIG. 9) and the indicator control unit (175' in FIG. 9), which will be described later, and details about this will be described later.

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

For reference, when the induction heating device 1 is a John-Free type induction heating device, there may be a plurality of working coil assemblies (WCA) as shown in FIGS. 3 and 4, and a plurality of working coil assemblies (e.g. For example, WCA) may be arranged to be spaced apart from each other by a predetermined distance.

However, for convenience of explanation, the description will be made using one working coil assembly (WCA) as an example.

Specifically, the working coil (WC) may be made of a conductor wound multiple times in a ring shape, and may generate an alternating magnetic field. Additionally, the mica sheet 120 and the ferrite core 126 may be sequentially disposed on the lower side of the working coil (WC).

Additionally, the ferrite core 126 may be disposed below the working coil WC, and a core hole (not shown) may be formed in the center to overlap the annular inner side of the working coil WC in a vertical direction.

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

Additionally, the ferrite core 126 may be fixed to the mica sheet 120 using a sealant and may serve to diffuse the alternating current 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 packing gasket 149 is attached to the top. A sensor (S) may be installed. That is, the sensor (S) may be installed inside the annulus of the working coil (WC).

For reference, the sensor (S) can detect the temperature of the working coil (WC). Of course, the sensor (S) can 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). Let's explain this using an example.

In addition, the sensor S can detect the temperature of the working coil WC and transmit the sensed temperature information to the indicator control unit (175' in FIG. 9), which will be described later, and details about this will be described later.

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

Specifically, the mica sheet 120 can be fixed to the working coil (WC) and the ferrite core 126 through a sealant, and the heat generated by the working coil (WC) is directly transferred to the ferrite core 126. It can be prevented.

For reference, although not shown in the drawing, the induction heating device 1 is fixed to the top of the working coil (WC) with a sealant, and has a second seat hole in the center to overlap the annular inner side of the working coil (WC) in a vertical direction. A second mica sheet (not shown) formed with (not shown) may be further included.

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

Specifically, a ferrite core 126, a mica sheet 120, and a working coil (WC) are sequentially stacked and installed on the base plate 145, and the base plate 145 is installed upward from the indicator substrate 175 (i.e. It can be arranged to be spaced apart in one direction (vertically). That is, the indicator substrate 175 may be placed below the base plate 145 and spaced apart from the base plate 145 .

Accordingly, an air flow path is formed between the base plate 145 and the indicator board 175, and cold air is allowed to circulate through this air flow path, thereby reducing the temperature of the working coil (WC) and the light emitting element 177. You can.

For reference, as shown in FIG. 7, a blowing fan 230 may be installed at the bottom of one side of the case 125, and cold air sucked in from the outside by the blowing fan 230 flows into the air flow path described above. It can be blown out.

Additionally, as shown in FIGS. 5 and 6, a connection hole 172 may be formed in the space between the ferrite cores of the base plate 145 to secure space for the connection portion 171. Here, the connection portion 171 may be installed to protrude from the indicator board 175 for organizing the conductors of the working coil WC and making electrical connections. That is, the conductive wire of the working coil disposed around may be connected to the connection portion 171.

Additionally, the base plate 145 may be, for example, formed as one piece and made of aluminum (Al), but is not limited thereto.

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

Specifically, a light guide 210 may be installed on the base plate 145 so as to be provided around the working coil WC. That is, four light guides (for example, 210) per working coil (WC) may be installed around the working coil (WC).

Additionally, as shown in FIGS. 5 and 6 , a light guide installation hole 147 for installing the light guide 210 may be formed in the base plate 145 in the space between the ferrite cores. That is, the light guide body installation hole 147 may be formed in the base plate 145 along the position where the light guide body 210 is installed. Therefore, the light guide installation holes 147 may also be formed around the working coil (WC), and four light guide installation holes (for example, 147) per one working coil (WC) may be formed around the working coil (WC). ) can be formed around.

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

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

The indicator substrate 175 is disposed on the lower side of the base plate 145 to be spaced apart from the base plate 145, and a plurality of light emitting devices (for example, 177) may be installed.

Specifically, the indicator substrate 175 may be installed on the indicator substrate supporter 170 to be spaced downward from the base plate 145 (that is, in the other direction of the vertical direction). Additionally, a plurality of light emitting devices (eg, 177) may be installed on the indicator substrate 175, and the plurality of light emitting devices (eg, 177) may be, for example, LEDs (Light Emitting Diodes).

For reference, the indicator board 175 may be implemented in the form of, for example, a PCB (i.e., printed circuit board), and determines whether the working coil (WC) is driven through a plurality of light-emitting devices (e.g., 177) and Heating intensity (i.e. thermal power) can be displayed. In addition, although not shown in the drawing, various components for driving a plurality of light emitting devices (for example, 177) may be further installed on the indicator board 175.

Additionally, an indicator control unit (175' in FIG. 9) communicatively connected to the sensor S may be installed on the indicator board 175, and details about this will be described later.

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

Specifically, the indicator substrate supporter 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 around the working coil WC, and can display whether the working coil WC is driven and its output intensity through the light emitting surface 214.

Also, as described above, four light guides (e.g., 210) per one working coil (WC) may be installed around the working coil (WC), and each light guide 210 is connected to the base plate. It can be installed in each light guide installation hole 147 formed at 145.

Additionally, the light guide 210 may be disposed above the light emitting device 177 and display the light emitted from the light emitting device 177 through the light emitting surface 214 at the top.

Meanwhile, the induction heating device 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, technology for supplying power wirelessly has been developed and applied to many electronic devices. Electronic devices equipped with wireless power transmission technology can charge their batteries simply by placing them on a charging pad without connecting a separate charging connector. Electronic devices using wireless power transmission do not require wired cords or chargers, which improves portability and reduces size and weight compared to conventional devices.

These wireless power transmission technologies largely include an electromagnetic induction method using a coil, a resonance method using resonance, and a radio wave radiation method that converts electrical energy into microwaves and transmits them. Among these, the electromagnetic induction method generates power using electromagnetic induction between the primary coil (for example, working coil (WC)) provided in a device that transmits wireless power and the secondary coil provided in a device that receives wireless power. It is a transmission technology.

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

Accordingly, the induction heating device 1 according to an embodiment of the present invention may be equipped with not only an induction heating function but also a wireless power transmission function. Furthermore, the induction heating mode or wireless power transmission mode may be controlled by the main control unit (310' in FIG. 9), so the induction heating function or wireless power transmission function can be selectively used as needed.

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

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

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

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

The main control unit 310' receives input provided by the user from the input interface 300, and can be communicatively connected to the indicator control unit 175' and the inverter control unit 400'.

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

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

Additionally, the main control unit 310' may transmit the input (i.e., 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 control unit 310' may control the operation of the input interface 300 (for example, a screen UI displayed on the input interface 300, etc.).

Additionally, the main control unit 310' may be installed inside the case (125 in FIG. 3) to be spaced apart from the indicator board 175 (for example, spaced to the lower side of the indicator board 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, printed circuit board). In addition, although not shown in the drawing, various components related to driving control of the input interface 300 other than the main control unit 310' may be further installed on the input interface board 310.

Meanwhile, the inverter control unit 400' controls the operation of the inverter unit IV and can 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 can receive information about the temperature of the working coil (WC) from the main control unit 310'. Additionally, the inverter control unit 400' may control the operation of the inverter unit IV based on 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 resonance current to only one working coil depending on the connection status with the working coil (one-to-one connection or one-to-many connection), or may apply resonance current to a plurality of working coils. may also be authorized.

For example, the inverter control unit 400' may communicate with the main control unit 310' using a UART (Universal asynchronous receiver/transmitter) method, but the communication is not limited thereto.

Additionally, the inverter control unit 400' may receive input (i.e., user input) from the main control unit 310', and control the operation of the inverter unit IV based on the received input.

For example, when the user provides an input related to starting operation of the working coil (WC) to the input interface 300, the main control unit 310' receives the corresponding input from the input interface 300 and operates the inverter control unit 400. '), and the inverter control unit 400' can start driving the working coil (WC) by starting the driving of the inverter unit (IV) based on the input provided from the main control unit 310'.

And the inverter control unit 400' may be installed on the inverter board 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 (i.e., printed circuit board). In addition, although not shown in the drawing, various components related to driving control of the inverter unit IV may be further installed in the inverter board 400 in addition to the inverter control unit 400'. Of course, an inverter unit (IV) may also be installed on the inverter board 400.

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

Specifically, the indicator control unit 175' is connected to the sensor S through a wire harness, and can receive information about the temperature of the working coil WC from the sensor S. In addition, the indicator control unit 175' is connected to the main control unit 310' through a wire harness, and can transmit information about the temperature of the working coil (WC) provided from the sensor (S) to the main control unit 310'. there is.

For reference, there may be a plurality of sensors (S) (i.e., a plurality of sensors provided according to the number of working coils), and the indicator control unit 175' may be connected to the plurality of sensors through separate wire harnesses. Specific details about this will be described later.

And the indicator control unit 175' may communicate with the main control unit 310' using, for example, I2C (Inter Integrated Circuit), but is not limited thereto.

Additionally, the indicator control unit 175' may be installed on the indicator board 175.

Specifically, the indicator substrate 175 may be disposed on the lower side of the working coil WC (i.e., the lower side of the base plate (145 in FIG. 3)), and the light-emitting device 177 (i.e., a plurality of light-emitting devices) may be used as an indicator. It may be installed on the substrate 175.

Additionally, the indicator control unit 175' can receive input (i.e., user input) from the main control unit 310', and controls the operation of the light emitting element 177 based on the input provided from the main control unit 310'. can do.

For example, when the user provides an input related to starting operation 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 operates the indicator control unit 175. '), and the indicator control unit 175' can start driving the working coil WC by starting the driving of the light emitting element 177 based on the input provided from the main control unit 310'.

For reference, the inverter control unit 400' may transmit information related to the operation of the inverter unit (IV) to the main control unit 310', and the main control unit 310' may transmit the inverter unit 310' provided from the inverter control unit 400'. Information related to the operation of (IV) can be transmitted to the indicator control unit 175'.

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

Accordingly, the light emitting element 177 can be driven in accordance with the driving of the inverter unit IV (that is, the driving of the working coil WC).

In this way, each control unit (i.e., indicator control unit 175', main control unit 310', and inverter control unit 400') communicates or operates through the above-described method. Hereinafter, Figures 10 and 11 With reference to, let's look at the connection structure between the indicator control unit 175' and the sensor (S).

Specifically, referring to FIGS. 10 and 11, a plurality of sensors (S1 to Sn; each sensor is provided for each working coil) is connected to an indicator control unit 175' installed on the indicator board 175 and a wire harness (WH1'). ~WHn') can be connected.

Accordingly, the indicator control unit 175' can collect information (i.e., data) about the temperature of the working coil detected by each of the plurality of sensors (S1 to Sn).

Additionally, the indicator control unit 175' may be connected to the main control unit 310' through a separate wire harness (WH'').

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

That is, the plurality of sensors (S1 to Sn) are connected to the indicator control unit 175' located at a closer distance than the main control unit 310' through wire harnesses (WH1' to WHn'), so that they are also connected to the main control unit 310'. Can be indirectly connected.

Meanwhile, the length of the wire harness (WH1'~WHn') used to connect the plurality of sensors (S1 to Sn) and the indicator control unit 175' is the plurality of sensors (S1 to Sn) and the input interface shown in FIG. It may be shorter than the length of the wire harnesses (WH1 to WHn) used to connect the boards 310 (i.e., the main control unit).

Additionally, the wire harness (WH'') used for connection between the indicator control unit 175' and the main control unit 310' may be a single wire harness.

Accordingly, unlike the prior art, in one embodiment of the present invention, the problem of numerous long wire harnesses being tangled with each other between the plurality of sensors (S1 to Sn) and the main control unit 310' can be solved, and the wire harness Connection and assembly can also be facilitated.

As described above, the induction heating device 1 according to an embodiment of the present invention can improve the wire harness structure, making connection and assembly of the wire harness easier, and thus, the inside of the induction heating device 1 It also becomes easier to secure the circuit layout area. Furthermore, the difficulty of circuit design can be reduced by securing the circuit layout area, and productivity can also be improved. Additionally, by improving the wire harness structure, the number of wire harnesses required can be reduced, thereby reducing manufacturing costs. In addition, by improving the wire harness structure, the problem of wire damage due to entanglement between wire harnesses can be prevented, and the problem of poor wire quality can also be solved.

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

The above-described present invention may be subject to various substitutions, modifications, and changes without departing from the technical spirit of the present invention to those skilled in the art to which the present invention pertains. It is not limited by .

119: cover plate 120: mica sheet
125: case 126: ferrite core
145: Base plate 170: Indicator board 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 control unit
400: Inverter board 400': Inverter control unit
WC: Working coil WCA: Working coil assembly
S: Sensor IV: Inverter unit

Claims (13)

case;
a plurality of working coils provided inside the case;
A plurality of sensors each detecting the temperature of the plurality of working coils;
an indicator board disposed below the plurality of working coils, equipped with a plurality of light-emitting elements, and equipped with an indicator control unit communicatively connected to the plurality of sensors; and
Including a main control unit communicatively connected to the indicator control unit,
Each of the plurality of sensors is connected in parallel to the indicator control unit by a separate different wire harness,
The main control unit is directly connected to the indicator control unit by a separate single wire harness.
Induction heating device.
According to paragraph 1,
Each of the plurality of sensors is installed inside the annulus of each of the plurality of working coils,
Induction heating device.
According to paragraph 2,
The main control unit is installed inside the case to be spaced apart from the indicator board.
Induction heating device.
According to paragraph 1,
an inverter unit that performs a switching operation to apply a resonance current to at least one of the plurality of working coils; and
Further comprising an inverter control unit that controls the operation of the inverter unit and is communicatively connected to the main control unit.
Induction heating device.
According to paragraph 4,
The inverter control unit,
Receive information about the temperature of at least one of the plurality of working coils from the main control unit,
Controlling the operation of the inverter unit based on the information about the provided temperature
Induction heating device.
According to paragraph 4,
The main control unit transmits the input provided by the user to at least one of the indicator control unit and the inverter control unit.
Induction heating device.
According to clause 6,
The indicator control unit controls driving of the plurality of light emitting elements based on the input provided from the main control unit,
The inverter control unit controls the driving of the inverter unit based on the input provided from the main control unit.
Induction heating device.
According to paragraph 4,
The indicator control unit communicates with the main control unit through I2C (Inter Integrated Circuit),
The inverter control unit communicates with the main control unit in a UART (Universal asynchronous receiver/transmitter) method.
Induction heating device.
According to paragraph 4,
The main control unit is installed on an input interface board provided inside the case,
The inverter control unit is installed on the inverter board provided inside the case.
Induction heating device.
According to paragraph 1,
a base plate disposed on an upper side of the indicator board;
a light guide installed on the base plate, disposed above the plurality of light emitting elements, and indicating whether the working coil is driven and the output intensity;
a ferrite core disposed below the working coil;
a mica sheet disposed between the working coil and the ferrite core to suppress heat transfer between the working coil and the ferrite core; and
Further comprising an indicator board support portion on which the indicator board is installed.
Induction heating device.
According to clause 10,
A core hole is formed in the center of the ferrite core to overlap the annular inner side of the working coil in a vertical direction.
Induction heating device.
According to clause 11,
A packing gasket is fastened to the core hole,
A sensor is installed on the top of the packing gasket.
Induction heating device.
According to clause 10,
The mica sheet is fixed to the working coil and the ferrite core through a sealant.
Induction heating device.