KR101623589B1

KR101623589B1 - Cooker and controlling method thereof

Info

Publication number: KR101623589B1
Application number: KR1020090110249A
Authority: KR
Inventors: 이석재
Original assignee: 엘지전자 주식회사
Priority date: 2009-11-16
Filing date: 2009-11-16
Publication date: 2016-05-23
Also published as: KR20110053636A

Abstract

The present embodiment relates to a cooking device and a control method of the cooking device.

In the cooking apparatus according to the present embodiment, the cooking apparatus of this embodiment includes a heating source for burning gas to generate a flame; A gas valve for supplying the gas to the heating source; An MFP that keeps the gas valve in an open state in the process of burning the gas; A heating source flame detecting unit for detecting whether the flame of the heating source is generated; A main control unit for generating an MPI driving signal for the MPI according to whether the flame is detected by the heating source flame detection unit; A power supply unit for supplying power to the MP only when the control unit driving signal applied from the main control unit is a normal signal; And an MFP control unit for supplying power to the power supply unit when the MFP driving signal is applied from the main control unit.

Therefore, when the flame is not detected in the heating source, there is an advantage that the gas can be prevented from leaking as the gas supply to the heating source is blocked.

Further, when the main control unit is abnormally operated in a state in which the flame is not sensed and the gas valve opening / holding signal is inputted to the gas control unit side or when the main control unit is congested and an abnormal signal is input, There is an advantage that the gas leakage can be prevented.

Cooking equipment, gas

Description

Cooker and controlling method < RTI ID = 0.0 >

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a cooking apparatus, and more particularly, to a cooking apparatus that performs heating cooking using combustion heat generated by burning gas.

A cooking device is a device for heating and cooking food using a heating source.

Generally, a cooking device is a device for heating a food by using combustion heat such as gas, combustion heat generated by the combustion, or various heat by electric or other energy sources.

When the cooking appliance uses a combustible gas such as gas, if the combustible gas leaks from the heating source in a state in which the combustible gas is not burned, the cooking device is seriously dangerous in the use process.

The object of this embodiment is to provide a cooking appliance which performs combustion heating using gas, wherein the supply of the gas is cut off in a state in which the gas is not burned.

To achieve the above object, a cooking apparatus of the present embodiment includes a heating source for burning a gas to generate a flame; A gas valve for supplying the gas to the heating source; An MFP that keeps the gas valve in an open state in the process of burning the gas; A heating source flame detecting unit for detecting whether the flame of the heating source is generated; A main control unit for generating an MPI driving signal for the MPI according to whether the flame is detected by the heating source flame detection unit; A power supply unit for supplying power to the MP only when the control unit driving signal applied from the main control unit is a normal signal; And an EMF control unit for supplying power to the power supply unit when the EMF driving signal is applied from the main control unit.

The control method of the cooking apparatus according to the present embodiment is a cooking apparatus including an MFP for maintaining gas supply to a heating source and an MFP control unit for controlling the MFP, Detecting the flame and operating the second switching unit of the MFP control unit in an ON state; And when the flame is generated in the heating source, activating the first switching unit of the MFP control unit in the ON state by the main control unit, wherein both the first switching unit and the second switching unit are operated in the ON state The MFP control unit activates the MFP only so that the gas supply to the heating source is maintained.

According to the proposed embodiment, when the flame is not detected in the heating source, there is an advantage that the gas can be prevented from leaking as the gas supply to the heating source is blocked.

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

1 is a perspective view of a cooking apparatus according to the present embodiment.

Referring to FIG. 1, the cooking apparatus 1 according to the present embodiment includes a top burner unit 100 for heating and cooking food by the heat of combustion of gas, An oven 300 for heating and cooking the food using heat radiation, and a warming drawer 400 for maintaining the food in a heated state at a predetermined temperature.

The oven part 300 and the warming drawer part 400 are provided with a door rotatable up and down by a predetermined hinge part so as to open and close a cavity (not shown) serving as a food cooking space and a handle provided at one side of the door .

The top burner unit 100 may be positioned on the upper side of the cooking apparatus 1 and the cooking vessel containing the food or the food may be heated and cooked while being placed on the top burner unit 100.

The top burner unit 100 is provided with a plurality of heating sources 110 to 140 for generating a flame by supplying a gas to be supplied to the top burner unit 100, that is, a top burner and a plurality of heating sources 110 to 140, A plurality of top grids 160 are mounted. A plurality of operation knobs 710 to 740 are provided on one side of the cooking appliance 1 for controlling the combustion operation of the heating sources 110 to 140 by the user.

The operation of the top burner unit 100 will be briefly described. When the user rotates and / or presses the operation knobs 710 to 740 corresponding to any one of the plurality of heating sources 110 to 140, (Not shown) connected to the circles 110 to 140 and simultaneously an ignition unit (not shown) flame corresponding to the heating source 110 to 140 is generated. As the gas is combusted, .

The ignition portion is operated by directly interlocking with the rotation and / or pressing operation of the operation knobs 710 to 740 or by sensing the operation of the operation knobs 710 to 740 in the main control portion 53 , The spark generation operation of the spark portion can be activated.

In this case, when the normal combustion of the gas is not performed in the heating sources 110 to 140, in order to prevent the gas from leaking, when the combustion of the gas, that is, when the flame is not detected, The gas supply / cutoff unit 50 (see FIG. 2) for cutting off the supply of the K gas may be further included in the cooking apparatus 1 according to the present embodiment.

Hereinafter, the configuration of the gas supply / cut-off unit 50 will be described in detail.

FIG. 2 is a block diagram of a gas supply / cutoff unit of a cooking apparatus according to an embodiment of the present invention, and FIG. 3 is a circuit diagram showing the configuration of FIG. 2 in detail.

2 and 3, the gas supply / cutoff unit 50 according to the present embodiment includes a flame detection switching unit 51, a heating source flame detection unit 52, a main control unit 53, (54), an MPI control unit (55), and an MPI (56).

When the flame is normally generated in the heat sources 210 to 240 and the user does not stop the combustion in the heat sources 210 to 240 separately, the MFP 56 (Magnetic Power Unit) So that the gas supply to the first and second fuel cells 210 to 240 can be maintained. When a voltage of a certain magnitude is applied to the coil, an electromagnetic force is generated in the magnet on which the coil is wound, and the gas valve 56, which closes the gas supply pipe by the force of the electromagnetic force, .

Meanwhile, the cooking apparatus 1 according to the present embodiment may further include heat sensing elements 211 to 241 that generate a voltage of a predetermined magnitude when the flame is generated in the heat sources 210 to 240 .

One side of the heat sensing elements 211 to 241 is in contact with or adjacent to the flames of at least the heat sources 210 to 240 and the other side is connected to the flame detection switching unit 51 and the heating source flame detection unit 52 When the flame is generated, a voltage of a predetermined magnitude is applied to the flame detection switching unit 51 and the heating source flame detection unit 52.

The heat sensing elements 211 to 241 may be a heat sensing member such as a thermocouple formed by joining two kinds of metals.

The flame detection switching unit 51 and the heating source flame detection unit 52 are connected to the first heat sensing element 211 through the first node A and are connected to the first heating source 210, the first node A is supplied with a predetermined voltage, for example, a flame sensing voltage of 6 to 10 mV.

The heating source flame detecting unit 52 and the flame detecting switching unit 51 include a first amplifier 521 and a second amplifier 511 for amplifying the flame sensing voltage applied from the first heat sensing device 211, And a first comparator 522 and a second comparator 512. [

The flame sensing voltage amplified by the first amplifier 521 and the second amplifier 511 is input to one of the input terminals of the first comparator 522 and the second comparator 512, . The first comparator 522 and the second comparator 512 compare the flame detection voltage with the reference voltage, and output the output signal corresponding to the comparison result through the output terminal.

At this time, the output terminal of the first comparator 522 is connected to the main control unit 53 and outputs a signal regarding whether the flame is detected in the output signal, that is, the first heating source 210. When the flame is detected, the main control unit 53 turns on the first switching unit Q3 of the MP control unit 55. On the other hand, when the flame is not detected, the main control unit 53 keeps the first switching unit Q3 of the MP control unit 55 in the off state.

The output terminal of the second comparator 512 is connected to the second switching unit Q2 of the MP control unit 55 so that the second switching unit Q2 is activated regardless of the operating state of the main control unit 53 . That is, when the flame is detected in the first heating source 210, the flame detection switching unit 51 operates the second switching unit Q2 in the on state regardless of the operating state of the main control unit 53, In the opposite case, it is operated in the off state.

On the other hand, the MPI power supply unit 54 has a configuration for supplying power to the EPOFU 56 via the EPI control unit 55, in which the drive signal S input from the main control unit 53 is a normal signal Only a voltage of a predetermined magnitude is applied to the second node B. [

More specifically, the MP feeder power supply unit 54 includes a drive signal filter unit 541 and a voltage supply unit side switching unit Q1.

The driving signal filtering unit 541 according to the present exemplary embodiment may be configured such that the driving signal S input from the main control unit 53 is a sinusoidal wave having a constant period Only the driving signal S is determined to be a normal driving signal and is allowed to pass.

The drive signal S that has passed through the drive signal filter unit 541 is input to the base (B) of the voltage supply unit side switching unit Q1. Therefore, the voltage supply unit side switching unit Q1 is operated in the ON state and power of a predetermined magnitude is supplied from the terminal of the emitter E connected to the power supply end side to the terminal of the collector C connected to the second node B , And a supply voltage of a predetermined magnitude is applied to the second node (B).

On the contrary, when the drive signal S input from the main control unit 53 is not in the sinusoidal form, that is, when a high or low signal is constantly input regardless of time, the main control unit 53 The driving signal filtering unit 541 blocks the abnormal driving signal S by determining that the driving signal S is an abnormal driving signal. That is, when the drive signal S is not in the normal state, the drive signal S is blocked by the drive signal filter unit 541, the power supply unit side switching unit Q1 is kept in the off state , The power supply from the power supply terminal is cut off.

The MFP control unit 55 controls the power supply to the MFP 56 according to whether the second switching unit Q2 and the first switching unit Q3 are connected in order to the second node B .

In more detail, the MFP control unit 55 includes a power supply line connected from the second node B to the MFP. A first switching unit Q3 connected to the main control unit 53 is provided between the second node B and the MFP 56 in the power supply line. The first switching unit Q3, And a second switching unit Q2 connected between the two nodes B to which the flame detection switching unit 51 is connected.

The first switching unit Q3 and the second switching unit Q2 include first switching devices Q31 and Q21 connected to the output terminals of the main control unit 53 and the second comparator 512, And second switching elements Q32 and Q22 interlocked with the switching elements Q31 and Q21.

The driving of the first switching devices Q31 and Q21 and the second switching devices Q32 and Q22 is similar to the driving of the switching unit Q1 on the power supply side, and thus a detailed description thereof will be omitted.

The flame detection switching unit 51, the heating source flame detection unit 52, the flameproof control unit 55 and the flameproof unit 56 according to the present embodiment are provided for detecting the flame of the first heating source 210 And may include a plurality of components corresponding to the first to fourth heating sources 210 to 240 of the present embodiment, respectively.

However, the configurations of the flame detection switching unit, the heating source flame detection unit, the MFP control unit, and the MP corresponding to the second to fourth heating sources 220 to 240 are not limited to the configuration corresponding to the first heating source 210, The configuration of the flame detection switching unit, the heating source flame detection unit, the MFP control unit, and the MPI corresponding to the second to fourth heating sources 220 to 240 will be omitted.

Hereinafter, the driving process of the gas supply / cut-off unit 50 according to whether or not the first heating source 210 detects flames will be described in detail.

4 is a flowchart showing a control method of the cooking apparatus according to the present embodiment.

Referring to FIG. 4, first, it is determined whether an ignition signal of the heat sources 210 to 240 is input (S1). As described above, the ignition signal can be input to the cooking apparatus 1 as the user rotates and / or presses the operation knobs 710 to 740, for example.

When the ignition signal is inputted, the gas is supplied to the heat sources 210 to 240, and the heat sources 210 to 240 are ignited (S2).

Next, it is determined whether or not the flame F is detected by the ignition in the heat source 210 to 240 (S3). If the flame F is detected, the flame detection switching unit 51 The second switching unit Q2 of the oil control unit 55 is turned on (S4).

Next, the MPU power supply unit 54 determines whether the drive signal S input from the main control unit 53 is a normal signal, and determines whether the main control unit 53 operates normally (S5).

When the operation state of the main control unit 53 is in a normal state, the MPI power supply unit 54 starts power supply to the MP control unit 55 (S6).

Then, it is determined whether or not the gas valve opening maintaining signal is input from the main control unit 53 (S7). The gas valve open holding signal is input from the main control unit 53 to the first switching unit Q3 of the MP control unit 55 when the generation of the flame F is normally maintained.

When the gas valve opening hold signal is input to the first switching unit Q3, the first switching unit Q3 is operated in the ON state (S9).

2) the second switching unit Q2 is operated in the ON state; and 3) the driving signal S input from the main control unit 53 is in the ON state, In the case of inputting a normal signal, the MFP 56 is activated and the gas valve is kept open (S9).

It is determined whether or not the heating operation of the heating sources 210 to 240 is terminated (S10). If the heating operation is not terminated, whether the heating sources 210 to 240 detect the flame F (S3). When the heating operation is completed, the gas valve is closed and the heating source (210-240) is extinguished (S11), and the control is terminated.

When the flame is not detected in the heat sources 210 to 240 or the main control unit 53 is not operated normally in step S5 and the main control unit 53 switches the gas to the first switching unit Q3, When the valve opening maintaining signal is not inputted (S7), the gas valve is closed and the heating sources 210 to 240 are extinguished (S11).

According to the proposed embodiment, when the flame is not detected in the heat sources 210 to 240, the gas can be prevented from leaking due to the interruption of the gas supply to the heat sources 210 to 240 .

When the main control unit 53 is abnormally operated in a state in which the flame is not sensed and the gas valve opening maintaining signal is inputted to the side of the EMI control unit 55 or when the main control unit 53 is congested, There is an advantage that the EPO oil 56 is prevented from being operated and the gas leakage can be prevented.

2 is a block diagram showing the gas supply / cutoff portion of the cooking apparatus according to the present embodiment.

3 is a circuit diagram showing the configuration of FIG. 2 in detail;

Claims

A heating source for burning gas to generate a flame;

A gas valve for supplying the gas to the heating source;

An MFP that keeps the gas valve open;

An MPI control unit for controlling operations of the MPI;

An MFP power supply unit for supplying power to the MFP;

A heat sensing element having one side positioned adjacent to the heating source and the other side connected to the heating source flame sensing unit and the flame sensing switching unit; And

And a main control unit for controlling operations of the MFP power supply unit and the MFP control unit when the flame is sensed by the heat sensing device,

In the MPEG control section,

A first switching unit operated according to whether the flame is detected by the heating source flame detecting unit; And

And a second switching unit operated according to whether the flame is sensed by the flame detection switching unit,

Wherein when the first switching unit and the second switching unit are operated together, the MRI power supply unit supplies the MRI power to the MRI power source.

The method according to claim 1,

Wherein the heating source flame detecting unit comprises:

A first amplifier for amplifying a sensing voltage generated when a flame of the heating source is sensed; And

And a first comparator for comparing the sensed voltage amplified by the first amplifier with a preset reference voltage and transmitting the compared result to the main control unit.

The method according to claim 1,

Wherein the first switching unit is operated in response to a driving signal of the main control unit and is located at a power supply line between the Mfu power supply unit and the Mfu.

The method of claim 3,

Wherein the second switching unit is operated only when the flame of the heating source is generated irrespective of the operation of the main control unit, and the second switching unit is operated when the cooking unit is located between the first switching unit and the MPU power supply unit device.

The method according to claim 1,

Wherein the flame detection switching unit comprises:

A second amplifier for amplifying a sensing voltage generated when the flame of the heating source is sensed; And

And a second comparator for comparing the sensed voltage amplified by the second amplifier with a predetermined reference voltage and for operating the second switching unit according to a comparison result.

The method according to claim 1,

Wherein the heat sensing element is a thermocouple element generating a voltage of a predetermined magnitude by the flame.

The method according to claim 1,

The MPU power supply unit may include:

A drive signal filter unit which passes the drive signal input from the main control unit only when the drive signal is in the form of a sinusoidal wave of a predetermined period; And

And a switching unit on the side of the MPU power supply unit that operates when the driving signal of the main control unit that has passed through the driving signal filter unit is inputted.

A control method for a cooking appliance including an Mfu for maintaining a gas supply to a heating source and an Mfu control for controlling the Mfu,

A voltage is applied to the flame detection switching unit and the heating source flame detection unit through the heat sensing element when the flame is detected in the heating source;

When the voltage is applied to the flame sensing switching unit, turning on the second switching unit of the MFP control unit; And

And when the voltage is applied to the heating source flame sensing unit, the main control unit activates the first switching unit of the EP control unit in an ON state,

Wherein power is supplied to the MPI only when both the first switching unit and the second switching unit are operated in the ON state.

9. The method of claim 8,

Only when an operation signal of a sinusoidal wave having a predetermined period is input to the MPU power supply unit, the MPU power supply unit for supplying power to the MPU through the MPU control unit, To the cooking utensil (1).