KR100783147B1 - Induction heating apparatus - Google Patents

Abstract

An induction heating cooker is provided to improve a thermal efficiency and simplify a mechanical structure by substituting an induction heating coil for top and side electric heaters installed in an oven. An induction heating cooker includes an integrated controller(300), a power supply(500), an induction heating inverter(400), and a coil member(600). The integrated controller consists of a processor(310), a voice storing unit(330), a voice processing codec(312), an LCD control unit(311), a digital/analog converting unit(340), and a fan power supply unit(350). The power supply is constituted of a rectifying unit and a filter. The induction heating inverter is constituted of a power semiconductor switching element driving unit(410), a power semiconductor switching element(420), and an overvoltage protecting unit(430). The coil member is constituted of top and side heater coils(630,650), a resonance condenser(610), a switch, and an oven coil(660).

Description

Induction Heating Cooker {INDUCTION HEATING APPARATUS}

1 is a view showing the configuration of a conventional induction heating cooking apparatus.

2 is a block diagram of the induction heating cooking apparatus of the present invention.

3 is a detail of FIG. 2;

<Description of the symbols for the main parts of the drawings>

300: integrated controller 310: processor

311: LCD control unit 312: voice processing codec

320: Timer 330: Voice storage unit

340: digital / analog converter 350: fan power supply

400: induction heating inverter

410: power semiconductor switching element driver

420: power semiconductor switching element 430: overvoltage protection unit

500: power supply unit 600: coil unit

610: resonant capacitor 630: upper heater coil

650: side heater coil 660: oven coil

710: LCD 720: switch and sensor

730: speaker 740: fan

760: Oven

The present invention relates to an induction heating cooking apparatus, and in particular, to use a single processor for the control of the induction heating cooking apparatus, thereby reducing the number of parts and to enable efficient management and control of the entire system by a single processor. One induction heating cooking apparatus.

In general, induction heating device uses Eddy Current Loss and alternating magnetic field by causing an induction magnetic field generated when switching induction heating coil at high speed to flow Eddy Current to the surface of magnetic heating object adjacent to induction heating coil. An apparatus for generating heat due to hysteresis loss by the induction heating cooking apparatus is a device to heat the cooking vessel using the same.

Such a conventional induction heating cooking apparatus is configured as shown in Figure 1, the controller 100 for controlling the operating state of the induction heating power supply 200 is provided operating state from the induction heating power supply 200 In addition to receiving a variety of information on the control command for operation to supply to the induction heating power supply 200.

The induction heating power supply unit 200 operates by supplying power to the operation of the heater unit 210 and the coil 230 for heating the cooker under the control of the controller 100, and also for a hot air circulation inside the cooker. Drive 220.

In addition, the controller 100 controls the LCD 130 for displaying the operation state of the cooker, and performs a command input through the switch unit 140 from the user, and also the voice unit 110 and the speaker ( The voice of the cooker is guided through 120.

However, in the conventional induction heating cooking apparatus, the induction heating power supply unit 200 is configured in an analog manner, and the controller 100 is configured in a digital manner, and the CPU is present in each of them, resulting in an increase in cost.

That is, the controller 100 is provided with a CPU for controlling the entire system, and the induction heating power supply unit 200 performs a command applied from the controller 100, processes various information, and supplies the same to the controller 100. Since a separate CPU must be provided, the manufacturing cost increases.

In addition, in order to generate, store, and reuse data, various wirings, circuits, and software must be provided for communication between the controller 100 and the induction heating power supply unit 200, so that the efficiency is lowered. ), There is a problem that the ability to cope in an emergency situation.

In addition, when the controller 100 itself performs the processing for voice guidance, the CPU burden increases, so a separate voice processing chip must be provided, and heat conduction loss is achieved because an electric heater is used to heat the side and the upper part of the cooker. There is a problem that the efficiency is lowered.

The present invention is to solve this problem, by configuring a CPU provided in each of the conventional controller and the induction heating power supply unit as a single microprocessor using a DSP, RISC, MCU MCU to reduce the cost and efficiency of control and data processing In addition, the purpose of the present invention is to provide an induction heating cooking apparatus capable of simplifying the structure by using induction heating without using an electric heater for heating the upper and side surfaces of the cooker.

Induction heating cooking apparatus according to the present invention for achieving the object of the present invention,

LCD and speaker for visually and audibly guiding the various states of the cooking apparatus to the user, a fan for hot air circulation inside the oven, an oven for heating and cooking food contained therein, and a switch for receiving various commands from the user. In the induction heating cooking apparatus having a sensor unit for sensing the operating state of the cooking apparatus,

1) a processor for receiving a command input from a user and sensing results from various sensors, processing the same, and outputting a control signal for driving a power semiconductor switching device;

A voice storage unit for storing voice for voice guidance;

A voice processing codec which exists in the form of a program in the processor to process and output a voice of a voice storage;

An LCD control unit for controlling driving of the LCD;

A digital / analog converter for converting a digital voice signal output from the voice processing codec into an analog signal and outputting the same through a speaker;

An integrated controller having a fan power supply for supplying operating power to the fan;

2) rectifier for rectifying commercial power through bridge diode,

A power supply comprising a reactor and a capacitor and having a filter for filtering the rectified power;

3) a power semiconductor switching element driver for driving the power semiconductor switching element by the power semiconductor switching element driving signal output from the processor of the integrated controller;

A power semiconductor switching element driven by the power semiconductor switching element driver to switch and output power supplied from a power supply unit;

An induction heating inverter having an overvoltage protection unit that protects an overvoltage higher than an allowable breakdown voltage of the power semiconductor switching element;

4) upper and side heater coils located on the upper and side surfaces of the oven;

A resonance capacitor provided between the output terminal of the induction heating inverter and the heater coil to apply a resonance voltage to the heater coil;

A switch for switching by the coil switching signal output from the processor of the integrated controller to apply the resonance voltage to the upper and side heater coils;

Characterized in that the coil portion having an oven coil for heating the oven by receiving the output of the induction heating inverter.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

2 is a block diagram of the induction heating cooking apparatus of the present invention, Figure 3 is a detailed view of FIG.

As illustrated, the integrated controller 300 includes a processor 310, a timer 320, a voice storage unit 330, and a digital / analog converter having an integrated LCD control unit 311 and a voice processing codec 312. 340 and the fan power supply unit 350 are configured as a single module, and the processor 310 manages the entire system up to the coil unit 600 under the control of the semiconductor switching element driver 400 for power management. Done.

The processor 310 displays the timing result counted from the timer 320 on the LCD 710 through the LCD control unit 311, and also manages various types of time management of the system, that is, reservation cooking and cooking time.

The processor 310 is composed of any one chip of DSP, RISC, MCU, LCD chip 311 and the digital / analog converter 340 may be provided integrally or separately provided on the chip. .

The LCD control unit 311 displays and guides the current state and various operating states of the cooking apparatus on the LCD 710 by the processor 310, and also controls the voice processing codec 312 so that a separate voice storage unit ( The voice guide stored in the 330 is processed and output to the digital / analog converter 340.

As a result, the voice guidance is displayed audibly through the speaker 730. In this case, the voice processing codec 312 is configured in software in the processor 310 so that the voice processing chip does not need to be separately provided as in the related art. .

The processor 310 receives a user command and various sensing information of the cooking apparatus from the switch and sensor unit 720 to control the operation of the system. In order to perform cooking, the processor 310 must control the operation state of the coil unit 600. do.

To this end, a control should be made such that the coil unit 600 receives power by the operation of the power supply unit 500. The power supply unit 500 converts the input power source 510 into the rectifier 520 into direct current power. By removing a noise component such as ripple by a filter composed of the reactor 540 and the condenser 550, a smooth DC power is supplied to the induction heating inverter 400.

At this time, the processor 310 generates a pulse voltage by controlling the power semiconductor switching element driver 410 of the induction heating inverter 400, and controls the gate of the power semiconductor switching element 420 by this pulse voltage. As a result, the power of the power supply unit 500 is appropriately interrupted and supplied to the coil unit 600 through the power semiconductor switching element 520.

In addition, the overvoltage protection unit 430 composed of a zener diode prevents overvoltage from being induced at the gate terminal of the power semiconductor switching element 520 and is installed between the collector and the gate to provide the power semiconductor switching element 520. Will be protected.

The power output from the power semiconductor switching element 520 is input to the resonant capacitor 610 of the coil unit 600, the resonance is made by the time constant, the heater coils mounted on the upper and side surfaces inside the oven 760 ( Power is supplied to 630 and 650, respectively.

In order to selectively supply power to the heater coils 630 and 650, the processor 310 of the integrated controller 300 generates a switching control signal to control the switching of the upper heater coil switch 620 and the side heater coil switch 640. It is possible by doing.

In addition, the oven coil 660 is also supplied with power from the power semiconductor switching element driver 400 to heat the oven 760 to cook.

On the other hand, the output terminal of the current sensor 530 and the rectifier 520 at the input terminal of the power supply unit 500 for the protection of the entire cooking apparatus including the induction heating inverter 400 by the overvoltage and overcurrent in the power supply unit 500 Voltage sensors 560 and 570 are provided at both sides of the reactor 540, and current and voltage values detected therefrom are input to the processor 310.

When it is determined that the overcurrent and the overvoltage are generated based on the sensed value, the processor 310 stops the driving of the power semiconductor switching element driver 410 and thus the power semiconductor switching element 420 and the coil unit 600. To protect the back.

The integrated controller 300 is provided with a fan power source 350 for supplying power to the fan 740 for the heat circulation in the oven, the current sensor (between the fan power source 350 and the fan 740). 750 is provided to receive the sensing value from the processor 310.

The processor 310 may determine whether the fan 740 is broken by the sensing value of the current sensor 750.

As described above, although described with reference to a preferred embodiment of the present invention, those skilled in the art various modifications of the present invention without departing from the spirit and scope of the invention described in the claims below Or it may be modified.

As described above, according to the present invention, it is possible to save resources in the operation of exchanging data between two CPUs together with cost reduction by integrating and controlling two CPUs as one processor.

In addition, as the conventional voice processing part is implemented by software in the processor, the cost and space are saved, and the heat efficiency is increased and mechanical structure is replaced by replacing the upper and side heat heaters in the oven with induction heating coils. Has the effect of simplifying.

Claims (5)

LCD and speaker for visually and audibly guiding the various states of the cooking apparatus to the user, a fan for hot air circulation inside the oven, an oven for heating and cooking food contained therein, and a switch for receiving various commands from the user. In the induction heating cooking apparatus having a sensor unit for sensing the operating state of the cooking apparatus, 1) a processor for receiving a command input from a user and sensing results from various sensors, processing the same, and outputting a control signal for driving a power semiconductor switching device; A voice storage unit for storing voice for voice guidance; A voice processing codec which exists in the form of a program in the processor and processes and outputs a voice of a voice storage; An LCD control unit for controlling driving of the LCD; A digital / analog converter for converting a digital voice signal output from the voice processing codec into an analog signal and outputting the same through a speaker; An integrated controller having a fan power supply for supplying operating power to the fan; 2) rectifier for rectifying commercial power through bridge diode, A power supply comprising a reactor and a capacitor and having a filter for filtering the rectified power; 3) a power semiconductor switching element driver for driving the power semiconductor switching element by the power semiconductor switching element driving signal output from the processor of the integrated controller; A power semiconductor switching element driven by the power semiconductor switching element driver to switch and output power supplied from a power supply unit; An induction heating inverter having an overvoltage protection unit that protects an overvoltage higher than an allowable breakdown voltage of the power semiconductor switching element; 4) upper and side heater coils located on the upper and side surfaces of the oven; A resonance capacitor provided between the output terminal of the induction heating inverter and the heater coil to apply a resonance voltage to the heater coil; A switch for switching by the coil switching signal output from the processor of the integrated controller to apply the resonance voltage to the upper and side heater coils; Induction heating cooking apparatus characterized in that consisting of a coil unit having an oven coil for heating the oven by receiving the output of the induction heating inverter. The induction heating cooking apparatus according to claim 1, wherein the processor of the integrated controller is one of a DSP, a RISC, and an MCU. The induction heating according to claim 1, wherein the power supply unit includes a sensor for detecting overvoltage and overcurrent, and the processor receives a result detected from the sensor to control driving of the power semiconductor switching element driver. Cooking device. The induction heating cooking apparatus according to claim 1, wherein a current sensor is provided between the fan power supply unit and the fan of the integrated controller to supply the sensing result to the processor. The induction heating cooking device according to claim 1, wherein the overvoltage protection unit of the induction heating inverter is composed of a zener diode.

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