KR100231039B1 - Microwave oven and its control method - Google Patents

Abstract

The present invention relates to a microwave oven and an operation control method thereof, wherein a filter protection unit for opening or closing the detection unit is installed at an upper end of a partition wall on which a detection unit for sensing a temperature of a food is formed, and the filter protection unit when cooking the food. By closing the detection port to prevent contamination of the filter by the contaminants generated in the food in advance, the infrared sensor can detect the temperature of the food accurately to enable optimal cooking.

Description

Microwave and its operation control method

The present invention relates to a microwave oven, and more particularly, by installing a filter protection unit for opening or closing the sensing unit at an upper end of a partition wall on which a sensing unit for sensing a temperature of a food is formed. The present invention relates to a microwave oven and an operation control method thereof, in which an optimum cooking is prevented by preventing contamination of a filter.

In general, the microwave oven according to the related art has a partition wall 5 partitioning the cooking chamber 3 inside the main body 1 forming the exterior, as shown in FIG. 1, and at the bottom side of the partition wall 5. The turntable motor 7 driven by receiving power from a power supply unit (not shown) is disposed.

In addition, a detachable turntable 9 for placing food F is disposed on an upper surface of the turntable motor 7, and a high side voltage is supplied from a magnetron driver (not shown) to the side of the partition 5 to receive microwaves. Magnetron 11 is generated to generate.

In addition, the temperature sensing unit 22 for sensing the temperature of the food F is disposed on the upper part of the partition wall 5, and the temperature sensing unit 22 is used for the cooking of the food F in the cooking chamber 3. A sensing opening 13 is formed to sense a temperature, and an air induction pipe 15 for guiding the flow of air to the cooking chamber 3 is disposed at one side of the temperature sensing unit 22.

Here, as shown in FIG. 2, the temperature sensing unit 22 includes a filter 24 for passing only infrared rays, an infrared sensor 26 for sensing the amount of infrared light passing through the filter 24, and noise. Is made of a case 28 to prevent the leakage to the outside, the use of the phenomenon that the amount of infrared light emitted from the food (F) is detected differently depending on the temperature of the food (F).

On the other hand, Figure 3 is a schematic block diagram of a microwave oven configured as described above, as can be seen with reference to the same diagram, the microwave oven according to the present invention, the key input unit 20, the temperature sensing unit 22 , The control unit 30, the turntable motor driver 40, the magnetron driver 42, and the fan motor driver 44.

In FIG. 3, when the user inputs a cooking course and a cooking start of the food, the key input unit 20 outputs an electric key signal corresponding thereto, and the temperature sensing unit 22 detects the temperature of the food and corresponds to the cooking. Output the temperature detection signal.

In addition, the control unit 30 transmits a drive control signal for driving the turntable motor, the magnetron and the fan motor according to the key signal input from the key input unit 20, the turntable motor driver 40, the magnetron driver 42, and the fan motor driver. Output at (44) and count time at the same time.

The controller 30 receives a temperature sensing signal from the temperature sensing unit 22, calculates a cooking time according to the counted time when the temperature of the food reaches a predetermined temperature, and passes the cooking time in which the counted time is calculated. Then, a stop control signal for stopping the turntable motor, the magnetron and the fan motor is output to the turntable motor driver 40, the magnetron driver 42, and the fan motor driver 44.

In addition, the turntable motor driver 40 drives the turntable motor by the drive control signal from the controller 30, stops the turntable motor by the stop control signal from the controller 30, and the magnetron driver 42 The magnetron is driven by the drive control signal from the control unit 30, while the magnetron is stopped by the stop control signal from the control unit 30.

The fan motor driver 44 drives the fan motor by the drive control signal from the controller 30, and stops the fan motor by the stop control signal from the controller 30.

In the microwave oven according to the related art, the user puts the food F on the upper surface of the turntable 9 in the cooking chamber 3 and the cooking course (for example, microwave cooking) through the key input unit 20. After selecting and inputting the start key, the key input unit 20 outputs the corresponding electric key signal to the control unit 30.

Next, when the controller 30 receives the key signal and determines whether the start key is input, and determines that the start key has been input, driving for driving the turntable motor 7, the magnetron 11, and the fan motor. The control signal is output to the turntable motor driver 40, the magnetron driver 42, and the fan motor driver 44, while counting the time.

Then, the turntable motor driver 40 drives the turntable motor 7 by the drive control signal, and the magnetron driver 42 drives the magnetron 11 by the drive control signal, and the fan The motor driver 44 drives the fan motor by the drive control signal.

Next, the turntable 9 rotates as the turntable motor 7 is driven to rotate the food F, and as the fan motor is driven, the fan rotates to cool the magnetron 11 and the magnetron. As the (11) is driven, microwaves are generated to heat and cook the rotating food (F).

Next, the infrared sensor 26 of the temperature sensing unit 22 senses the amount of infrared light emitted from the food F through the filter 24 and controls the electric temperature sensing signal corresponding thereto. ) And the control unit 30 receives the temperature detection signal from the temperature sensing unit 22 and calculates the cooking time according to the counted time when the temperature of the food F passes a predetermined temperature.

Next, the control unit 30 determines whether the counted cooking time has passed the calculated cooking time, and when it is determined that the cooking time has elapsed, the control unit 30 stops to stop the turntable motor 7, the magnetron 11, and the fan motor. The control signal is output to the turntable motor driver 40, the magnetron driver 42, and the fan motor driver 44.

Then, the turntable motor driver 40 stops the turntable motor 7 by the stop control signal, and the magnetron driver 42 stops the magnetron by the stop control signal, and the fan motor driver ( 55 stops the fan motor by the stop control signal.

Next, the turntable 9 does not rotate as the turntable motor 7 is stopped, the fan does not rotate as the fan motor is stopped, and microwaves do not occur as the magnetron 11 is stopped, thereby cooking. The cooking of water is completed.

However, the microwave oven according to the related art contaminates the filter of the temperature sensing unit by contaminants (for example, oil, smoke, and steam flowing out of the food) generated during cooking of the food, such that the infrared sensor causes the temperature of the food to cook. There was a problem that does not accurately detect the optimum cooking.

Therefore, the present invention has been made in order to solve the above problems, by installing a filter protection unit for opening or shielding the detection port on the upper part of the barrier rib formed with the detection port contamination of the filter by the contaminants generated when cooking food. The purpose of the present invention is to provide a microwave oven and an operation control method capable of optimal cooking by preventing the oil in advance.

The microwave oven according to the present invention for achieving the above object is provided with a control unit for heating and cooking the food by generating a microwave according to the detection signal input from the infrared sensor for sensing the temperature of the food through a filter that passes only infrared light In the stove, a filter protector is further provided to prevent the filter from being contaminated, while the controller is configured to drive or stop the filter protector according to the temperature of the food detected by the infrared sensor.

The operation control method of the microwave oven according to the present invention for achieving the above object is the step of driving the filter protection unit when the start key is input by the user, the step of cooking the food according to the cooking course selected by the user, the counting time A step of detecting the temperature of the food, a step of calculating the cooking time according to the counted time when the temperature of the food passes a predetermined temperature, a step of stopping the filter protection unit when the temperature of the food passes the boiling temperature, and counting And a step of stopping cooking of the food when the cooking time passes the calculated cooking time.

1 is a schematic internal configuration diagram of a microwave oven according to the prior art,

2 is a schematic perspective view of the temperature sensing unit of FIG. 1;

3 is a schematic block diagram of a microwave oven according to the related art;

4 is a schematic block diagram of a microwave oven according to the present invention;

5 is a schematic internal configuration diagram of a microwave oven according to the present invention;

6 is a schematic perspective view of the temperature sensing unit and the filter protecting unit of FIG. 5;

7 is a view for explaining the operation of the filter protection unit of FIG.

8 is a flowchart showing the operation procedure of the operation control method of the microwave oven according to the present invention.

<Description of the code | symbol about the principal part of drawing>

5: bulkhead 13: detection port

50: key input unit 52: temperature detection unit

54 filter 56 infrared sensor

58: case 60: control unit

70: turntable motor driving unit 72: magnetron driving unit

74: fan motor drive unit 76: filter protection unit

77 solenoid 78 blocking member

79 spring 80 support member

Hereinafter, a microwave oven and an operation control method thereof according to the present invention will be described in detail with reference to the accompanying drawings.

In FIG. 4 to FIG. 6, the same components as those in the related art are denoted by the same names, and detailed description thereof will be omitted.

4 is a schematic block diagram of a microwave oven according to the present invention. As can be seen from the drawing, the microwave oven according to the present invention includes a key input unit 50, a temperature sensing unit 52, and a controller 60. ), A turntable motor driver 70, a magnetron driver 72, a fan motor driver 74, and a filter protector 76.

In FIG. 4, the controller 60 outputs a driving control signal for driving the solenoid to the filter protection unit 76 according to the key signal input from the key input unit 50, while driving the turntable motor, the magnetron, and the fan motor. The drive control signal for outputting is output to the turntable motor driver 70, the magnetron driver 72, and the fan motor driver 74.

In addition, the controller 60 counts the time and receives a temperature sensing signal from the temperature sensing unit 52 when the temperature of the food detected by the temperature sensing unit 52 passes a predetermined temperature. The cooking time is calculated based on the cooking time according to the time counted until a predetermined temperature has elapsed, and the temperature of the food detected by the temperature sensing unit 52 is the temperature at which the food boils (for example, 85 ° C.). When elapsed, a stop control signal for stopping the solenoid is output to the filter protection unit 76.

When the counting time has passed the calculated cooking time, the control unit 60 outputs a stop control signal for stopping the turntable motor, the magnetron and the fan motor, the turntable motor driver 70, the magnetron driver 72, and the fan motor. It outputs to the drive part 74.

In addition, the filter protector 76 is to protect the filter from contaminants generated during cooking of the food. As shown in FIGS. 5 and 6, the filter protector 76 is disposed at an upper portion of the partition wall 5 partitioning the cooking chamber 3. The solenoid 77 driven or stopped by the drive control signal or the stop control signal of the control unit 60 and the solenoid 77 are disposed on one side of the solenoid 77 so that the solenoid 77 is driven or stopped. Blocking member 78 for opening or closing the sensing opening 13 formed in the upper portion, as shown in Figure 7, when the solenoid 77 is stopped, the blocking member 78 is returned to the A direction to detect the sensing hole 13 ) Is made of a spring (79) to close and a support member (80) for supporting the spring (79) to have a predetermined elasticity.

On the other hand, Figure 8 is a flow chart showing the operation sequence of the operation control method of the microwave oven according to the present invention, as can be seen with reference to the same drawing, the operation control method of the microwave oven according to the present invention, the user has a cooking course After the selection, a step (S10) of inputting a start key, a step (S12) of determining whether a start key is input, a step (S14) of driving a filter protection unit if a start key is input, and cooking food according to the selected cooking course Step S16, step S18 for counting time, step S20 for sensing the temperature of the food, step S22 for determining whether the temperature of the food has passed a predetermined temperature, cooking time according to the counted time Step (S24) for calculating, step (S26) for determining whether the temperature of the food has passed the boiling temperature, step (S28) for stopping the filter protection unit when the temperature of the food passes the boiling temperature, the counted time is calculated Cooking time Step S30 of determining whether it has been exceeded, and step S32 of stopping cooking of the food when the counted time passes the calculated cooking time.

Hereinafter, a microwave oven and an operation control method thereof according to the present invention configured as described above will be described in detail with reference to FIGS. 4 to 8.

First, when the user places the food F on the upper surface of the turntable 9 in the cooking chamber 3, selects a cooking course (eg, microwave cooking) through the key input unit 50, and then enters a start key. In operation S10, the key input unit 50 outputs an electric key signal corresponding thereto to the control unit 60.

Next, when the controller 60 receives the key signal and determines whether the start key is input and determines that the start key is not input, the control unit 60 repeatedly determines whether the start key is input, while the start key is input. If it is determined, the drive control signal for driving the solenoid 77 is output to the filter protection unit 76 (S12).

Then, the solenoid 77 of the filter protection unit 76 is driven by the drive control signal, and the blocking member 78 opens the detection port 13 as the solenoid 77 is driven ( S14).

Next, the control unit 60 outputs a drive control signal for driving the turntable motor 7, the magnetron 11, and the fan motor to the turntable motor driver 70, the magnetron driver 72, and the fan motor driver 74. The turntable motor driver 70 drives the turntable motor 7 by the drive control signal, the magnetron driver 72 drives the magnetron 11 by the drive control signal, and the fan motor driver 74 drives the fan motor by the drive control signal.

Then, the turntable 9 rotates as the turntable motor 7 is driven to rotate the food F, and as the fan motor is driven, the fan rotates to cool the magnetron 11, As the magnetron 11 is driven, microwaves are generated to heat and cook the rotating food F (S16).

Next, the controller 60 drives the magnetron 11 and simultaneously counts the cooking time (S18), and the infrared sensor 56 of the temperature sensing unit 52 passes through the filter 54. Sense the amount of infrared light emitted from the) and outputs an electrical temperature detection signal corresponding thereto to the controller 60 (S20).

Next, the controller 60 receives the temperature sensing signal and determines whether the temperature of the food F detected by the temperature sensing unit 52 has passed a predetermined temperature (S22). If it is determined that the elapsed time has not passed, it is repeated to determine whether the detected temperature of the food F has passed the predetermined temperature, and if it is determined that the predetermined temperature has elapsed, based on the cooking time according to the preset counted time. The cooking time is calculated (S24).

Next, the controller 60 determines whether the temperature of the food F detected by the temperature sensing unit 52 has elapsed the boiling temperature, and if it is determined that the boiling temperature has not elapsed, the detected food ( While repeatedly determining whether the temperature of F) has passed the boiling temperature, if it is determined that the boiling temperature has elapsed, a stop control signal for stopping the solenoid 77 is output to the filter protection unit 76 (S26). ).

Then, the solenoid 77 of the filter protector 76 is stopped by the stop control signal, and as the solenoid 77 is stopped, the shutoff member 78 is returned by the elasticity of the spring 79. The detection port 13 is closed (S28).

Next, the controller 60 determines whether the counted cooking time has passed the calculated cooking time, and when it is determined that the cooking time has elapsed, the controller 60 stops the motor for stopping the turntable motor 7, the magnetron 11, and the fan motor. The control signal is output to the turntable motor driver 70, the magnetron driver 72, and the fan motor driver 74 (S30).

Then, the turntable motor driver 70 stops the turntable motor 7 by the stop control signal, and the magnetron driver 72 stops the magnetron by the stop control signal, and the fan motor driver ( 74) stops the fan motor by the stop control signal.

Next, the turntable 9 does not rotate as the turntable motor 7 is stopped, the fan does not rotate as the fan motor is stopped, and microwaves do not occur as the magnetron 11 is stopped, thereby cooking. The water cooking is completed (S32).

On the other hand, in the microwave oven and the operation control method according to the present invention as described above, when the user selects microwave cooking, the control unit drives the filter protection unit and then drive the magnetron to stop the filter protection unit when the cooking temperature is boiling filter For example, the present invention is not limited thereto. However, the present invention is not limited thereto, and in a microwave oven equipped with a heater, when the user selects the heater cooking, the controller drives the filter protection unit and then drives the heater to increase the boiling temperature of the food. It is natural to stop the filter protection unit to protect the filter.

As described above, the microwave oven and the operation control method according to the present invention by closing the detection port formed on the upper part of the partition wall when cooking food to prevent contamination of the filter by the contaminants generated in the food in advance , As the infrared sensor accurately detects the temperature of the food, there is an effect of optimum cooking.

Claims (3)

In the microwave oven is provided with a control unit for heating and cooking food by generating a microwave in response to the detection signal input from the infrared sensor for sensing the temperature of the food through a filter that passes only the infrared, A filter protection unit is further provided to prevent the filter from being contaminated, while the controller is configured to drive or stop the filter protection unit according to the temperature of the food detected by the infrared sensor. The method of claim 1, wherein the filter protection unit, A solenoid driven or stopped by a control signal of the controller; Blocking member for opening or closing the sensing opening formed in the upper portion of the cooking chamber as the solenoid is driven or stopped; A spring for returning the blocking member to close the sensing opening when the solenoid is stopped; Microwave oven comprising a support member for supporting the spring to have a predetermined elasticity. Driving the filter protection unit when a start key is input by a user; Cooking food according to a cooking course selected by a user; Counting time; Sensing the temperature of the food; Calculating cooking time according to the counted time when the temperature of the food passes a predetermined temperature; Stopping the filter protection unit when the temperature of the food passes the boiling temperature; And a step of stopping cooking of the food when the counted time passes the calculated cooking time.

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