KR100360224B1 - Compound cooker and controlling method thereof - Google Patents

Abstract

PURPOSE: A compound cooker and a controlling method thereof are provided to reduce the inconvenience due to the height of a cooking vessel by using an inductive heating cooking vessel within a heating room. CONSTITUTION: A shielding plate(23) is installed on a bottom face of a heating room(21) in order to transmit the magnetic field and reflect microwaves. A magnetron is installed on an outer wall side of the heating room(21). A cooking vessel decision portion decides a state of a cooking vessel(22) within the heating room(21). A cooking sensor(27) is installed around an exhaust hole of the heating room(21) in order to perform an automatic cooking operation. The cooking vessel decision portion includes a material detection coil(26) for detecting the current applied on a working coil(25), a material detection portion(33) for detecting the current applied to the material detection coil(26) as the voltage, a current detection portion(30) for detecting the amount of current, and a resonant capacitor voltage detection portion(35) for detecting a voltage between both ends of a resonant capacitor.

Description

Compound cooker and its control method

The present invention relates to a cooker, in particular, in a multi-cooker combined with a microwave oven and an induction heating cooker to determine the container in the cooking chamber to control to the optimum output for each container, to perform automatic cooking during induction heating cooking It relates to a composite cooker and a control method thereof.

The composite cooker which can combine a microwave oven and an induction heating cooker is mainly shown in FIG. 1 because there is no material that performs a selective function of reflecting microwaves and transmitting a high frequency magnetic field for induction cooking. As described above, a working coil base (5) for induction heating cooking on the upper surface of an existing microwave oven product consisting of a heating chamber (1), a rotating plate (2) for rotating food, and a revolving motor (3). And a working coil 7 were mounted, and a ceramic plate 6 was installed to place a cooking vessel 8 on the upper surface thereof.

In order to adjust the output of the magnetron 10 and the working coil (7), respectively, an induction heating cooking output adjusting unit (9) and a magnetron output control unit (11) were installed, which were oscillated through one inverter (12). It was made.

In addition, the inverter 12 controls the input state of the first key input unit 15 for the user to select the induction heating cooking and the second key input unit 18 for selecting the cooking by microwave. In order to determine that the drive through the output drive control unit 13, and to prevent the temperature of the heating chamber (1) from being excessively increased, the fan motor 16 was installed and controlled by the output drive unit (17).

That is, during induction heating cooking, when the user places the cooking vessel 8 on the ceramic plate 6 and the user inputs a start key through the first key input unit 15, the control unit 14 determines the output driving control unit after determination. (13) to drive the inverter 12, the induction heating cooking output control unit 9 again controls the output to generate the switching current of the working coil (7) induction heating the cooking vessel (8) The food contained therein is to be cooked, and when cooking using microwave, when the user stores the food in the heating chamber 1 and inputs a start key through the second key input unit 18, as in induction heating cooking. After the determination by the control unit 14 controls the output drive control unit 13 to drive the inverter 12, by controlling the output of the magnetron 10 through the magnetron output control unit 11 to generate a microwave to the heating chamber Food in (1) It was allowed to cook.

However, such a complex cooker, because the container of the induction heating cooking function is stored in the upper surface of the microwave oven, because the position of the cooking container is high, it is very inconvenient to cook heavy food, and when cooking food with broth When the boiling water enters the microwave inlet, it causes a breakdown, and since the sensor for determining the cooking state is in the heating chamber, the sensor cannot be used during induction cooking, and thus automatic cooking is not possible. Induction heating cooking Dedicated container, that is, only the magnetic container can be used because the container has a very limited problem.

Therefore, an object of the present invention, in order to solve the above problems, it is possible to use the induction heating cooking vessel in the heating chamber to reduce the inconvenience caused by the height of the cooking vessel, automatic cooking is possible even during induction heating, It is to provide a composite cooker that can cook with optimum output by detecting the material of the container.

Another object of the present invention is to provide a control method for controlling the composite cooker efficiently.

The automatic heating device of the composite cooker of the present invention for achieving the above object is provided with a shielding plate for transmitting the magnetic field for induction heating cooking and reflecting the microwaves on the bottom surface of the heating chamber, the micro wall on the outer wall surface of the heating chamber A composite cooker on which a magnetron generating wave is installed, the cooking cooker comprising means for determining a cooking container and performing automatic cooking through a cooking sensor installed around an outlet.

The control method of the automatic heating device of the composite cooker of the present invention for achieving another object of the present invention is a composite cooker capable of cooking and induction heating cooking by the magnetron, the cooking vessel is placed in the heating chamber to the user When the start key is input, the process of driving the working coil at a specific frequency for a few seconds, the current flowing through the working coil and the current flowing through the input power line and the output of the resonance capacitor for resonating the inverter as input material of the cooking vessel And determining a cooking state by inspecting gas discharged to the outside of the heating chamber during cooking, and ending cooking when a predetermined level is reached. It is characterized by.

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

In the cooker of the present invention, as shown in FIG. 2, a cooking vessel 22 is placed, a discharge port is positioned at an upper end thereof, a heating chamber 21 at which an inlet is positioned at a lower end thereof, and induction heating cooking is provided at a lower part thereof. Installed on the bottom surface of the heating chamber 21 to place the working coil 25 for the shielding plate 23 for transmitting the magnetic field for induction cooking and reflecting microwaves, and the inner or outer shell of the wicking coil 25 When the coil is wound on a surface and heated for a few seconds at a specific frequency, a material detecting coil 26 for sensing a current flowing on the working coil 25 according to the material of the cooking vessel 22 and around the outlet of the heating chamber 21 Installed in the sensor to analyze the gas exiting through the outlet during cooking 27 and the sensor 27 to process the signal sensed by the sensor 27 to deliver to the control unit 37 to enable automatic cooking. Sensor signal processing unit 28, It is installed at the inlet side of the heating chamber 21 to cool the inside and at the same time to uniformize the internal temperature, the cooling fan 30 for effectively inducing the air flow to the outlet side, the magnetron and the magnetron to generate a real microwave Magnetron output unit 29 for adjusting the output of the, induction heating cooking output control unit 32, magnetron output control unit 29, induction heating cooking output control unit for adjusting the output of the working coil 25 An inverter 31 for driving the 32 and the cooling fan 30, an output drive controller 34 for controlling the inverter 31 according to a control signal of the controller 37, and the cooking vessel 22. The amount of current flowing through the input power line according to the material detecting unit 33 and the material of the cooking vessel 22 for detecting the amount of current flowing through the material detecting coil 26 by voltage according to the material of Current detector for (36), the resonant capacitor voltage detection unit 35 for detecting the voltage of both ends of the resonant capacitor for the induction heating cooking output according to the material of the cooking vessel 22, the material detection unit 33 and the current detection unit 36 And a material determination unit 38 for determining the material of the cooking vessel from the output of the resonance capacitor voltage detection unit 35, a key input unit 39 for the user to select various types of cooking, and operations of the components. And a control unit 37 for controlling, in particular, the material detecting coil 26, the material detecting unit 33, the current point detecting unit 36, and the resonance capacitor voltage detecting unit 35 are cooking vessel determining means. , Operation and control method are as follows.

First, when the cooking vessel 22 is placed in the heating chamber and the start key is input by the user, as shown in FIG. 3, induction heating cooking is performed at a specific frequency for several seconds at the initial stage of driving, and the material detecting coil ( The amount of current flowing through the working coil 25 through 26 is different depending on the material of the cooking vessel 22, which is detected as a voltage in the material detecting unit 33 and used as material determination information of the cooking vessel 22. In addition, the amount of current flowing through the input power line has a correlation with the material of the cooking vessel 22, and the current detecting unit 36 detects this, and also the voltage at both ends of the resonant capacitor for resonating the inverter. It has a correlation with the material of the container 2, and it is detected by the resonant capacitor voltage detector 35, and thus, from the material detector 33, the current detector 36 and the resonant capacitor voltage detector 35. Using the detected value, the material of the cooking vessel is determined from the material determination reference information previously tabled in the control unit 37.

At this time, looking at the material determination reference information of the cooking vessel, the voltage value of the material detecting unit 33 is represented as a non-magnetic container> magnetic container> a microwave-only container, the voltage value of the resonant capacitor voltage detection unit 35 is a magnetic container> visa. In the order of a container> a microwave-only container, and finally, the current detection value detected by the current detector 36 appears as a magnetic container> a non-magnetic container ≥ a microwave-only container, and this information is tabled in the controller 37.

Subsequently, when the material of the cooking vessel 22 is determined based on the reference information as described above, the inverter 31 is switched to operate in the specific mode so as to be suitable for the cooking vessel 22.

That is, if the cooking container 22 is a magnetic container, induction heating cooking is performed at 30 KHz, and if the aluminum container capable of induction heating is a non-magnetic container, induction heating cooking is performed at 80 KHz. Drive it.

Subsequently, the gas is emitted from the outlet during cooking through the sensor 27, and when the signal processing level detected by the sensor is equal to or greater than a predetermined value, the cooking is completed by determining that cooking is completed.

As described above, according to the present invention, it is possible to use the induction heating cooking container in the heating chamber to reduce the inconvenience of the user by the height of the cooking vessel, when cooking by induction heating or microwave cooking through the sensor around the outlet. All of them can be auto-cooked, and by detecting the material of the container to control the output of the inverter to the optimum state in accordance with the material can not only increase the efficiency of use, but also has the effect of using a variety of cooking vessels compared to the conventional.

1 is a block diagram of a composite cooker according to the prior art.

2 is a block diagram of a composite cooker according to the present invention.

Figure 3 is a flow chart showing a control method of a composite cooker according to the present invention.

****** Explanation of symbols for main parts of the drawings ******

21: heating chamber 22: cooking vessel

23: shield plate 24: working coil base

25: working coil 25: material detection coil

27: sensor 28: sensor signal processing unit

29: magnetron output control unit 30: cooling fan

31: Inverter 32: Induction heating cooking output control unit

33: material detection unit 34: output drive control unit

35: resonant capacitor voltage detector 36: current detector

37 control unit 38 material judgment

39: key input unit

Claims (3)

A shielding plate is installed on the bottom surface of the heating chamber for transmitting the magnetic field for induction heating and reflecting the microwaves, and the inside of the heating chamber is a composite cooker having a magnetron generating microwaves on the outer wall of the heating chamber. And a cooking vessel determining means for determining the placed cooking vessel, and to perform automatic cooking through a cooking sensor installed around the outlet of the heating chamber. The method of claim 1, wherein the cooking vessel judging means includes a material detecting coil for detecting a current flowing on the working coil, a material detecting unit for detecting a current flowing in the material detecting coil with a voltage, and an input power line. And a resonant capacitor voltage detector for detecting a voltage at both ends of the resonant capacitor for the induction heating cooking output. In the multi-cooker capable of cooking and induction heating cooking by the magnetron, when the cooking vessel is placed in the heating chamber and the start key is input by the user, the process of driving the working coil at a specific frequency for several seconds, Determining the material of the cooking vessel by inputting the current flowing through the input power line and the current flowing through the input power line and the resonant capacitor to resonate the inverter; controlling the drive of the inverter to be suitable for the cooking vessel; And determining the cooking state by inspecting the gas discharged to the outside of the heating chamber and ending the cooking when a predetermined level is reached.