KR101723414B1 - Microwave oven and Method for controlling it - Google Patents

Abstract

The present invention relates to a microwave oven and a control method thereof, and more particularly, to a microwave oven having a course input unit configured to input a cooking course; A cooking chamber in which a cooking object is accommodated; A magnetron formed to apply microwaves to the object to be cooked; An inverter device for converting an AC voltage supplied from the power supply part into a DC voltage and supplying the DC voltage to the magnetron; And a control unit configured to control driving of the inverter device. When a fermentation course is input through the course input unit, the controller supplies power to the magnetron during a first set time, and supplies power to the magnetron during a second set time. And the first on-off period during which the supply is interrupted is repeated a plurality of times during the third set time, and a control method thereof.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a microwave oven,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a microwave oven and a control method thereof, and more particularly, to a microwave oven capable of controlling an output through an inverter circuit device to improve the fermentation performance of foods and a control method thereof.

Generally, fermentation is one of various food recipes, and is a recipe used when making yogurt, bread or sikhye.

In order to maximize the proliferation of lactic acid bacteria and ferment the food, the space in which the fermented object is received must be maintained at an optimal temperature for a certain period of time.

For example, yogurt is most proliferated by lactic acid bacteria at about 40 ° C, and bread is also swollen at about 40 ° C by using gas generated by yeast fermentation using flour sugar.

In contrast, in the case of sikhye, the activation of the amylase enzyme contained in the malt was most active at about 60 ° C

When the temperature at which the food is fermented is less than the above-mentioned optimal temperature, the fermentation becomes low, and the flavor of the food decreases with the decrease of the number of the lactic acid bacteria.

On the other hand, when the temperature at which the food is fermented exceeds the above-mentioned optimal temperature, the fermentation is carried out to kill the lactic acid bacteria and reduce the flavor of the food.

Conventionally, as a device for fermenting food, a high-frequency microwave oven, an oven, or a device dedicated to fermentation may be used.

In the case of high-frequency microwave ovens and ovens, the output is turned on and off in a complicated cycle in order to keep the inside of the cooking chamber at the fermentation temperature.

However, in the case of general high-frequency microwave ovens and ovens, the minimum output is approximately 700 W to 800 W.

That is, the microwave microwave oven and the oven have a limit in the minimum output, and even if the inside of the cooking chamber is intermittently heated with the minimum output, the optimum temperature for fermentation can be temporarily and repeatedly exceeded.

In particular, when yogurt is produced through a high-frequency microwave oven and an oven, the temperature in the cooking chamber exceeds the optimum temperature during the fermentation process, and a significant amount of the lactic acid bacteria is killed.

In addition, when food is fermented through a high-frequency microwave oven and an oven, there is a problem that the cycle of turning on and off the output is not constant in order to maintain the inside of the cooking chamber at an optimum temperature.

That is, if the on / off period of the output is not constant, the control algorithm becomes complicated.

Further, in the case of the fermentation-only apparatus, the problem of fermentation through the high-frequency microwave oven and the oven can be overcome, but the additional cost for the user to purchase the microwave oven in addition to the domestic microwave oven is incurred.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems and it is an object of the present invention to provide a microwave oven capable of maintaining the optimum temperature for a fermentation time without exceeding an optimal temperature of a predetermined object for fermentation of food, .

It is another object of the present invention to provide a microwave oven capable of preventing the death of lactic acid bacteria as the temperature in the cooking chamber exceeds the optimum temperature for fermentation of food and a control method thereof.

It is another object of the present invention to provide a microwave oven capable of constantly turning on and off an output so as to maintain the inside of the cooking chamber at an optimum temperature for fermentation of food and a control method thereof.

It is another object of the present invention to provide a microwave oven and a control method thereof that can simplify a control algorithm as the output on / off period is made constant.

It is another object of the present invention to provide a microwave oven capable of realizing fermentation of food and a control method thereof without purchasing a separate fermentation device.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a cooking apparatus, A cooking chamber in which a cooking object is accommodated; A magnetron formed to apply microwaves to the object to be cooked; An inverter device for converting an AC voltage supplied from the power supply part into a DC voltage and supplying the DC voltage to the magnetron; And a control unit configured to control driving of the inverter device. When a fermentation course is input through the course input unit, the controller supplies power to the magnetron during a first set time, and supplies power to the magnetron during a second set time. And the first on-off period in which the supply is interrupted is repeated a plurality of times during the third set time period.

At this time, the controller may control the inverter device so that the output of the magnetron becomes 330 watts (W) to 440 watts (W) when power is supplied to the magnetron.

It is preferable that the first set time is shorter than the second set time.

The fermentation course may include a yogurt fermentation course, a bread fermentation course, and a Sikhah fermentation course, wherein the first set time, the second set time, and the third set time, At least one of the set times may be different.

Also, when the course input through the course input unit is a yogurt fermentation course, the first set time may be 7 seconds, the second set time may be 113 seconds, and the third set time may be 5 hours.

That is, the yogurt fermentation course can be run for 5 hours with a 120 second on-off period of the magnetron.

Also, when the course input through the course input unit is a bread fermentation course, the first set time may be 7 seconds, the second set time may be 113 seconds, and the third set time may be one hour.

That is, the bread fermentation course can be performed for 1 hour with a 120 second on-off period of the magnetron.

Also, the temperature of the object to be cooked during the third predetermined time may be maintained at 40 to 45 캜.

When the course input through the course input unit is a Sikhah fermentation course, the controller supplies power to the magnetron during the fourth set time before the first on-off period starts, The inverter device can be controlled such that the second on-off stock value at which the power supply to the magnetron is interrupted is repeated a plurality of times during the sixth set time period.

At this time, the first set time of the first on-off period is 9 seconds, the second set time is 51 seconds, the third set time at which the first on-off period is repeated is 2 hours and 30 minutes, The fourth set time of the two on-off periods is 11 seconds, the fifth set time is 21 seconds, and the sixth set time in which the second on-off period is repeated may be 2 hours and 30 minutes.

Also, the temperature of the object to be cooked during the sixth set time may be raised to 60 to 65 ° C at the initial temperature, and the temperature of the object to be cooked may be maintained at 60 to 65 ° C during the third set time.

Preferably, the temperature of the object to be cooked during the sixth set time period is increased to 60 ° C from the initial temperature, and the temperature of the object to be cooked during the third set time may be maintained at 60 ° C.

In addition, the controller may control the inverter device so that the output of the magnetron is maintained at 330 watts when power is supplied to the magnetron.

Meanwhile, in the yogurt fermentation course and the bread fermentation course, when the output of the magnetron is maintained at 440 watts (W), the first preset time may be 9 seconds and the second preset time may be 231 seconds.

According to another aspect of the present invention, there is provided a control method for a microwave oven including a magnetron configured to apply a microwave to a cooking object, and an inverter device for converting an AC voltage supplied from the power supply unit into a DC voltage and supplying the AC voltage to the magnetron. A course input step in which a fermentation course is inputted; And a first on-off period in which power is supplied to the magnetron during a first set time and power supply to the magnetron is interrupted during a second set time is repeated a plurality of times during a third set time And a control method of the microwave oven.

At this time, when power is supplied to the magnetron in the temperature maintenance step, the output of the magnetron may be maintained at 330 to 440 W (W).

The fermentation course may include a yogurt fermentation course, a bread fermentation course and a Sikhah fermentation course, and the first setting time, the second setting time, and the third setting At least one of the times may be different.

If the yogurt fermentation course is input in the course input step, the first set time of the first on-off period is 7 seconds, the second set time is 113 seconds, and the third set time becomes 5 hours .

If the bread fermentation course is input in the course input step, the first set time of the first on-off period is 7 seconds, the second set time is 113 seconds, and the third set time becomes 1 hour .

The control method of the microwave oven according to the present invention is characterized in that when a Sikhah fermentation course is inputted in the course input step, power is supplied to the magnetron during a fourth set time period before the temperature holding step, And the second on-off stock value at which the power supply of the second on-off power supply is interrupted is repeated a plurality of times during the sixth set time period.

Also, when power is supplied to the magnetron in the temperature raising step, the output of the magnetron may be maintained at 330 watts (W) to 440 watts (W).

Preferably, when power is supplied to the magnetron in the temperature raising step, the output of the magnetron may be maintained at 330 watts (W).

Also, the first set-up time of the first on-off period is 9 seconds and the second set-up time is 51 seconds, the third set-up time in which the first on-off period is repeated is 2 hours and 30 minutes, The fourth set time of the two on-off periods is 11 seconds, the fifth set time is 21 seconds, and the sixth set time in which the second on-off period is repeated may be 2 hours and 30 minutes.

According to the present invention, it is possible to provide a microwave oven capable of maintaining an optimum temperature during fermentation time without exceeding a predetermined optimum temperature for fermentation of food and a control method thereof.

In addition, according to the present invention, it is possible to provide a microwave oven capable of preventing the death of lactic acid bacteria as the temperature in the cooking chamber exceeds the optimum temperature for fermentation of food and a control method thereof.

Further, according to the present invention, it is possible to provide a microwave oven and a control method thereof, in which the cycle of turning on and off the output can be made constant so as to maintain the inside of the cooking chamber at an optimum temperature for fermentation of food.

Also, according to the present invention, it is possible to provide a microwave oven and a control method thereof that can simplify the control algorithm by keeping the output on / off period constant.

Further, according to the present invention, it is possible to provide a microwave oven capable of realizing fermentation of food and a control method thereof without purchasing a separate fermentation device.

1 is a perspective view of a microwave oven according to an embodiment of the present invention.
2 is a schematic configuration diagram of a microwave oven according to an embodiment of the present invention.
3 is a block diagram showing a connection relationship of main components of a microwave oven according to an embodiment of the present invention.
4 is a diagram illustrating a period in which power is applied to the magnetron when the yogurt is fermented using the microwave oven according to the embodiment of the present invention.
5 is a diagram illustrating a period in which power is applied to a magnetron when fermenting sikhye using a microwave oven according to an embodiment of the present invention.
6 is a flowchart showing a method of controlling a microwave oven according to an embodiment of the present invention.

Hereinafter, a cold water supply apparatus according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. The accompanying drawings illustrate exemplary embodiments of the present invention and are provided to explain the present invention in detail.

In addition, the same or corresponding components are denoted by the same reference numerals regardless of the reference numerals, and redundant description thereof will be omitted. For convenience of explanation, the size and shape of each constituent member shown may be exaggerated or reduced have.

1 is a perspective view of a microwave oven according to an embodiment of the present invention.

Referring to FIG. 1, a microwave oven 1 according to an embodiment of the present invention includes a cabinet 10 forming an outer appearance, a course input unit 20 formed to input a cooking course, a cooking chamber 30 containing a cooking object, A display unit 40 configured to display cooking information, and a door 50 configured to open and close the shore chamber 30.

The cabinet 10 forms the overall appearance of the microwave oven 1. In the cabinet 10, a microwave or electromagnetic wave may be provided to the cooking chamber 30 (not shown).

The course input unit 20 may be configured to input one of a plurality of cooking courses. That is, the user can input one course among a plurality of cooking courses through the course input unit 20. [

At this time, the plurality of cooking courses may include a thawing course, a heating course, a baking course, and a fermentation course. The fermentation course may include a yogurt fermentation course, a bread fermentation course, and a sikhye fermentation course.

In addition, the course input unit 20 may be formed in a dial shape capable of rotating operation, or may be formed of a touch panel capable of a typing input.

The cooking chamber 30 may be formed to provide a space in which a cooking object is accommodated. That is, the cooking chamber 30 may be formed to occupy a certain space in the cabinet 10.

The display unit 40 may be configured to display various kinds of cooking information. For example, the display unit 40 may display an input cooking course, an output based on the cooking course, a cooking time according to the cooking course, and remaining cooking time.

The door 50 may be provided in front of the cabinet 10 and may be formed to open or close the cooking chamber 30. [ In addition, the door 50 may be provided with a transparent portion 51 so that the cooking chamber 30 can be seen.

Hereinafter, other components for driving the microwave oven will be described with reference to other drawings.

2 is a schematic configuration diagram of a microwave oven according to an embodiment of the present invention.

2, a microwave oven 1 according to an embodiment of the present invention includes a cooking chamber 30 provided in the cabinet 10, a magnetron 60 (not shown) formed to apply a microwave (or an electromagnetic wave) to a cooking object, And an inverter device 70 for converting the AC voltage supplied from the power supply source 80 into a DC voltage and supplying the DC voltage to the magnetron 60.

That is, the microwave oven 1 according to the present invention may be an inverter microwave oven including the inverter device 70.

A cooking chamber 30 may be provided on one side of the cabinet 10 and the magnetron 60 and the inverter device 70 may be provided on the other side of the cabinet 10. At this time, the magnetron 60 may be arranged to apply a microwave to the cooking chamber 30. [

The magnetron 60 may be formed to generate microwaves (or electromagnetic waves). Specifically, the magnetron 60 is composed of a bipolar vacuum tube and may be formed to concentrate the microwave through the output antenna to the object to be cooked.

For example, when microwave is radiated to a cooking object, water molecules of water included in the cooking object are vibrated and the cooking object can be heated. In this case, unlike the conventional heating cooking apparatus in which heating is started from the surface of the object to be cooked, the interior of the object to be cooked can be heated first in the case of a microwave oven.

Since the heating method of the cooking object using the magnetron 60 is generally known, a detailed description thereof will be omitted.

The inverter device 70 may be configured to control a voltage supplied to the magnetron 60.

Specifically, the inverter device 70 may be configured to convert a commercial AC voltage supplied from an external power supply source 80 to a high output DC voltage and supply the converted DC voltage to the magnetron 60.

The inverter device 70 may be configured to selectively apply or cut off a DC voltage to the magnetron 60. The magnitude of the DC voltage applied to the magnetron 60 As shown in FIG.

Details of the control of the output of the magnetron 60 and the application / interruption of the voltage to the magnetron 60 by the inverter device 70 will be described in detail below with reference to other drawings.

3 is a block diagram showing a connection relationship of main components of a microwave oven according to an embodiment of the present invention.

Referring to FIGS. 2 and 3 together, the microwave oven 1 according to the embodiment of the present invention may further include a control unit 90 configured to control the driving of the inverter device 70.

For example, the control unit 70 may be configured to control driving of the inverter device 70 based on a course input through the course input unit 20. For example,

The control unit 70 may include a microcomputer 91 and an inverter control unit 92 electrically connected to the microcomputer 91.

The microcomputer 91 may be configured to receive a signal input through the course input unit 20. The inverter control unit 92 may be configured to receive the signal from the microcomputer 91 and to control the inverter device 70.

On the other hand, the commercial AC voltage supplied from the power supply source 80 is converted into the DC voltage through the inverter device 70, and the DC voltage can be applied to the magnetron 60.

Specifically, the inverter device 70 is connected to the power supply source 80 via a DC voltage unit 71, a switching unit 72 connected to the galvanic voltage unit 71, and a scrambling switching unit 72 And a magnetron driver 73.

The DC voltage unit 71 is configured to convert a commercial AC voltage supplied from the power supply source 80 into a DC voltage. For example, the DC full-up part 71 may be constituted by a bridge diode. Since such a bridge diode is generally known, a detailed description thereof will be omitted.

The switching unit 72 may be controlled by the controller 90. Specifically, the switching unit 72 may be configured to generate a driving power for driving the magnetron 50 by selectively turning on / off a plurality of switches according to a switching frequency output from the inverter control unit 92 .

That is, the switching unit 72 may be configured to change the frequency of the power source applied through the DC connection unit 71 according to the input course. Further, the output of the magnetron 60 may be changed based on the switching frequency changed in the switching unit 72. [

Since the switching unit 72 is also generally known, a detailed description thereof will be omitted.

The driving power generated by the switching unit 72 may be applied to the magnetron driving unit 73.

At this time, the magnetron driving unit 73 can activate the magnetron 60 by boosting the DC voltage applied from the switching unit 72 and outputting it to the magnetron 60.

For example, the microcomputer 91 is configured to control the overall driving of the microwave oven. The microcomputer 91 generates and modulates a drive pulse width based on a cooking instruction (for example, cooking course) input by the user and outputs the generated drive pulse width to the inverter control unit 92.

The inverter control unit 92 may control the plurality of switches provided in the switching unit 72 to be selectively turned on and off based on the driving pulse width transmitted from the microcomputer 91.

On the other hand, the output value of the magnetron 60 through the inverter device 70 is limited to the minimum output value and the maximum output value. The minimum output value of the magnetron 60 according to the embodiment of the present invention may be 330 watts and the maximum output value may be 1100 watts.

That is, according to the embodiment of the present invention, the output value of the magnetron 60 can be controlled to 330 to 1100 watts through the control of the inverter device 70 by the controller 90.

On the other hand, when the fermentation course is inputted through the course input unit 20, the temperature of the object to be cooked in the cooking chamber 30 must be maintained at a predetermined temperature (i.e., optimum temperature) for a preset time.

Further, in order to maintain the temperature of the object to be cooked at a predetermined temperature, it is necessary that the power supply to the magnetron 60 is intermittently repeated.

At this time, since the minimum output value of the general microwave oven is 700 W (W) or more, even if power is applied to the magnetron for a short period of time, the temperature of the cooking object may intermittently exceed the predetermined temperature.

If the temperature of the object to be cooked exceeds a predetermined temperature, the fermentation quality is deteriorated, and in the case of yogurt fermentation, the lactic acid bacteria may be killed.

Further, in the case of a general microwave oven, there is a problem that power supply to the magnetron for keeping the temperature of the object to be cooked at a predetermined temperature and the cutoff time are not constant.

In order to overcome such a problem, in the microwave oven 1 according to the embodiment of the present invention, when the fermentation course is input through the course input unit 20, the controller 90 controls the magnetron 60 for a first set time, Off period in which the power is supplied (or applied) to the magnetron 60 during the second set time is repeated a plurality of times during the third set time, and the inverter device 70 is controlled can do.

At this time, the second set time may be shorter than the first set time. That is, the power supply time to the magnetron 60 may be shorter than the power supply time to the magnetron 60 in the first on-off period. This is because, in the case of a fermentation course, the temperature of the object to be cooked must be maintained at about 40 to 60 캜.

That is, in the microwave oven 1 according to the embodiment of the present invention, the first set time and the second set time may be repeated a plurality of times during the third set time without changing the first set time and the second set time.

Therefore, according to the present invention, the control algorithm for supplying and blocking power to the magnetron 60 can be simplified.

Specifically, when the fermentation course is inputted through the course input unit 20, the microcomputer 91 outputs the drive pulse width corresponding to the inputted fermentation course to the inverter control unit 92. [ The inverter control unit 92 controls the switching unit 72 based on the driving pulse width and the magnetron driving unit 73 boosts the DC voltage applied from the switching unit 72 to control the magnetron 60 .

At this time, the inverter control unit 92 controls the switching unit 72 to apply power to the magnetron driving unit 73 for the first set time, and to cut off the power to the magnetron driving unit 73 for the second set time, (72) can be controlled.

The control unit 90 controls the inverter device 70 so that the output of the magnetron 60 is 330 watts to 440 watts when the magnetron 60 is supplied with power. can do.

The control unit 90 may control the inverter device 70 such that the output of the magnetron 60 is 330 watts when power is supplied to the magnetron 60.

That is, the controller 90 may control the inverter device 70 such that when the power is supplied to the magnetron 60, the output of the magnetron 60 is 30% of the maximum output (1100 watts) .

Specifically, the control of the output of the magnetron 60 may be performed through the control of the switching unit 72. That is, the control of the output of the magnetron 60 may be performed by controlling the switching frequency of the switching unit 72.

For example, the larger the switching frequency of the switching unit 72, the larger the output of the magnetron 50 can be.

When power is supplied to the magnetron 60 and the output of the magnetron 60 is maintained at 330 W, when the temperature of the object to be cooked exceeds a preset temperature suitable for fermentation, A problem can be prevented.

On the other hand, the fermentation course may include a yogurt fermentation course, a bread fermentation course, and a Sikhah fermentation course.

Referring to FIGS. 4 and 5, at least one of the first set time, the second set time, and the third set time may be changed according to a specific fermentation course input through the course input unit 20.

For example, referring to FIG. 4, when the course input through the course input unit 20 is a yogurt fermentation course, the first set time is 7 seconds and the second set time is 113 seconds, The set time can be five hours.

That is, when the course input through the course input unit 20 is a yogurt fermentation course, the control unit 90 controls the magnetron 60 to be in a first on-off state in which power is supplied to the magnetron 60 for 7 seconds and power supply is interrupted for 113 seconds The inverter device 70 can be controlled so that the cycle is repeated for 5 hours.

On the other hand, the material of the cooking object in the yogurt fermentation course may be milk and yogurt (or yogurt). For example, a yogurt fermentation course can be performed using a cooking object in which 100 ml of yomiuri is mixed with 500 ml of milk.

Alternatively, when the course input through the course input unit 20 is a bread fermentation course, the first set time and the second set time may be the same as those of the yogurt fermentation course. However, the third set time may be one hour (not shown).

On the other hand, the material of the cooking object in the bread fermentation course may include wheat flour, sugar, butter and yeast.

The controller 90 may control the inverter 70 such that the power of the magnetron 60 is approximately 330 watts when power is applied to the magnetron 60.

At this time, the temperature of the object to be cooked during the third set time is preferably maintained at 40 to 45 캜. That is, the temperature of the object to be cooked during the third setting time in the yogurt fermentation course and the bread fermentation course can be maintained at 40 to 45 캜. More preferably, the temperature of the object to be cooked during the third set time may be maintained at 40 캜.

5, when the course input through the course input unit 20 is a Sikhah fermentation course, the controller 90 controls the magnetron 30 during the fourth set time before the first on- And the second on-off period in which the power supply to the magnetron is interrupted during the fifth set time is repeated a plurality of times during the sixth set time.

That is, in the case of the Sikhah fermentation course, the second on-off period different from the first on-off period may be performed before the start of the first on-off period.

At this time, the fourth set time may be shorter than the fifth set time. That is, the power supply time to the magnetron 60 may be shorter than the power supply time to the magnetron 60 in the second on-off period.

The temperature of the object to be cooked (i.e., the Sikhah target) rises from pre-cooking temperature (approximately 20 캜) to approximately 60 캜 while the second on-off period is repeated for the sixth set time. That is, the temperature of the cooking object may be raised to the fermentation temperature as the second on-off period is repeated during the sixth set time.

At this time, the third set time may be the same as the sixth set time. That is, the third set time corresponding to the sixth set time corresponding to the temperature rise time at which the temperature of the object is raised from the initial temperature to 60 캜 and the temperature holding time at which the temperature of the cooking object is maintained at 60 캜 They can be the same.

In the case of a Sichiha fermentation course, the set temperature is higher than that of the yogurt or bread fermentation course, and control is required to raise the temperature of the cooking object as described above.

For example, the material of the cooking object in the Sikhye fermentation course may be malt and rice. Here, rice can be made using rice.

5, the first set time of the first on-off period is 9 seconds, the second set time is 51 seconds, and the third set time in which the first on-off period is repeated is 2 Time can be 30 minutes. Also, the fourth set time of the second on-off period is 11 seconds, the fifth set time is 21 seconds, and the sixth set time in which the second on-off period is repeated may be 2 hours and 20 minutes .

That is, when the course input through the course input unit 20 is a Sikhah fermentation course, the controller 90 controls the magnetron 60 to be turned on for 11 seconds, The inverter device 70 can be controlled so that the cycle is repeated for 2 hours and 30 minutes.

After the second on-off period is repeated for 2 hours and 20 minutes, a power is applied to the magnetron 60 for 9 seconds and a first on-off period Can be controlled to be repeated for 2 hours and 20 minutes.

The controller 90 may control the inverter 70 such that the power of the magnetron 60 is approximately 330 watts when power is applied to the magnetron 60.

At this time, the temperature of the object to be cooked during the sixth set time is raised to about 60 ° C to 65 ° C at an initial temperature (about 20 ° C), and the temperature of the object to be cooked is kept at 60 ° C to 65 ° C .

More preferably, the temperature of the object to be cooked during the sixth set time period is raised from the initial temperature (approximately 20 ° C) to approximately 60 ° C, and the temperature of the object to be cooked during the third set time may be maintained at 60 ° C.

Through the control of the inverter device 70 as described above, it is possible to prevent the problem of over fermentation or low fermentation in the fermentation course, to prevent the problem of lactic acid bacterial death due to the fermentation temperature being exceeded, .

In addition, according to the present invention, when the power is applied to the magnetron 60, energy consumed can be saved by maintaining the output of the magnetron 60 at the minimum output of 330 W (W).

Hereinafter, a method of controlling a microwave oven according to an embodiment of the present invention will be described with reference to other drawings.

6 is a flowchart showing a method of controlling a microwave oven according to an embodiment of the present invention.

Referring to FIG. 6, in explaining a method of controlling a microwave oven according to an embodiment of the present invention, it is apparent that the configuration of the microwave oven described with reference to FIGS. 1 to 5 can be similarly applied to a method of controlling a microwave oven.

Referring to FIG. 6, a control method of a microwave oven according to an embodiment of the present invention includes a magnetron 60 configured to apply a microwave to a cooking object, and a controller 60 for converting an AC voltage supplied from the power supply unit into a DC voltage, A method of controlling a microwave oven (1) including an inverter device (70) for supplying a course, comprising: a course input step (S10) for inputting a fermentation course through a course input unit; And a first on-off period in which power is supplied to the magnetron during a first set time and the power supply to the magnetron is interrupted during a second set time is repeated a plurality of times during a third set time do.

After the fermentation course among the plurality of cooking courses is inputted in the course input step S10, one specific fermentation course of the specific product fermentation course can be inputted by the user.

Specifically, the course input step S10 includes a fermentation course selection step S11 for inputting a fermentation course out of a plurality of cooking courses, and a product selection step S12 for inputting a specific product fermentation course among a plurality of specific product fermentation courses ).

For example, in the fermentation course selection step S11, it can be determined whether or not a fermentation course among a plurality of cooking courses is input by the user.

When the fermentation course is input in the fermentation course selection step S11, the product fermentation course may be input in the product selection step S12.

At this time, the fermentation course may include a plurality of specific product fermentation courses. The plurality of specific product fermentation courses include a yogurt fermentation course, a bread fermentation course and a sikhye fermentation course.

Therefore, after the fermentation course is inputted, one course of the yogurt fermentation course, the bread fermentation course and the Sikhye fermentation course can be inputted by the user.

At least one of the first set time, the second set time, and the third set time may be changed according to the specific fermentation course input through the course input unit 20. [

In the temperature holding step S30, the temperature of the object to be cooked can be maintained at a predetermined temperature as the power is periodically supplied or cut off by the magnetron 60. [

Also, when power is supplied to the magnetron in the temperature maintaining step S30, the output of the magnetron may be maintained at 330 to 440 watts. Preferably, when power is supplied to the magnetron in the temperature maintenance step S30, the output of the magnetron may be maintained at approximately 330 watts (W).

That is, when the power is supplied to the magnetron in the temperature holding step S30, the inverter unit 70 is controlled by the controller 90 so that the output of the magnetron is maintained at 330 watts (W) to 440 watts (W) Can be controlled.

Preferably, when power is supplied to the magnetron in the temperature maintaining step S30, the output of the magnetron may be maintained at 330 watts (W). This is to prevent degradation of fermentation quality and to save energy consumed in the fermentation course.

Meanwhile, the first set time may be shorter than the second set time. This is for intermittently heating the object to be cooked so as to maintain the temperature of the object to be cooked at a predetermined temperature during the entire cooking time.

On the other hand, as described above, the fermentation course may include a yogurt fermentation course, a bread fermentation course, and a Sikhah fermentation course.

For example, when the yogurt fermentation course is input in the course input step S10, the first setting time of the first on-off period in the temperature holding step S30 is 7 seconds, the second setting time is 113 seconds , And the third set time may be five hours.

Alternatively, if the bread fermentation course is input in the course input step S10, the first setting time of the first on-off period in the temperature holding step S30 is 7 seconds and the second setting time is 113 seconds , And the third set time may be one hour.

That is, the yogurt fermentation course and the bread fermentation course may have different third set times.

Here, the third set time represents a total time during which the first on-off period is repeated. In other words, the third set time may represent the entire cooking time of the yogurt fermentation course or bread fermentation course.

Specifically, in the case of the yogurt fermentation course, in the temperature maintenance step S30, the controller 90 sets the first set time of the first on-off period to 7 seconds and the second set time to 113 seconds, 70 may be controlled (S31), and the inverter device 70 may be controlled by the controller 90 so that the first on-off period is repeated for 5 hours (S32).

Alternatively, in the case of the bread fermentation course, the inverter device 70 may be controlled by the control section 90 such that the first set time of the first on-off period is 7 seconds and the second set time is 113 seconds, The inverter device 70 may be controlled by the controller 90 so that the first on-off period is repeated for one hour.

When the yogurt fermentation course or bread fermentation course is input in the course input step S10, the temperature of the object to be cooked (i.e., yogurt or bread) in the temperature holding step S30 may be maintained at about 40 占 폚.

The set times were values derived from the experiment, and according to the experimental results, the fermentation quality was the best at the time. For example, in the yogurt fermentation course, lactic acid bacteria were the least killed according to the set times. And in the bread fermentation course, according to the set times, yeast death was the least.

Meanwhile, in the method of controlling the microwave oven according to the embodiment of the present invention, when the Sikhah fermentation course is input in the course input step, power is supplied to the magnetron during the fourth set time period before the temperature maintaining step S30 And the second on-off stock value at which the power supply to the magnetron is interrupted during the fifth set time is repeated a plurality of times during the sixth set time (S20).

Here, the sixth set time represents a total time during which the second on-off period is repeated. In other words, the sum of the third setting time and the sixth setting time may indicate the entire cooking time during which the Sikhah fermentation course is performed.

In the Sikhye fermentation course, the initial temperature of the object to be cooked is about 20 ° C, and the optimum fermentation temperature suitable for sikhye fermentation is 60 ° C.

Therefore, in the Sichiha fermentation course, the temperature of the object to be cooked must be maintained at about 60 ° C in the temperature holding step (S30), and the temperature of the object to be cooked before the temperature holding step (S30) .

Therefore, the temperature of the object to be cooked for fermentation of sikhye may be increased from 20 ° C, which is the initial temperature, to 60 ° C in the temperature raising step (S20).

Also, when the power is supplied to the magnetron 60 in the temperature raising step S20, the output of the magnetron 60 may be maintained at about 330 watts (W) to 440 watts (W). Preferably, when power is supplied to the magnetron 60 in the temperature raising step S20, the output of the magnetron 60 may be maintained at approximately 330 watts (W). This is to prevent deterioration of the fermentation quality and to save energy consumed in the fermentation course.

On the other hand, if the Sikhah fermentation course is input in the course input step S10, the first set time of the first on-off period is 9 seconds and the second set time is 51 seconds in the temperature holding step S30 , And the third set time for which the first on-off period is repeated may be 2 hours and 30 minutes.

Also, in the temperature raising step (S20), the fourth set time of the second on-off period is 11 seconds and the fifth set time is 21 seconds, and the sixth on- Can be 2 hours and 30 minutes.

That is, the controller 90 sets the fourth set time of the second on-off period to 11 seconds and the fifth set time to 21 seconds in the temperature raising step (S20) according to the Sikhah fermentation course by the inverter device 70 May be controlled (S21), and the inverter device 70 may be controlled by the controller 90 so that the second on-off period is repeated for 2 hours and 30 minutes (S22).

The controller 90 controls the inverter 70 so that the first set-up time of the first on-off period becomes 9 seconds and the second set time becomes 51 seconds in the temperature maintaining step S30 according to the Sichiha fermentation course. The inverter unit 70 may be controlled by the controller 90 so that the first on-off period is repeated for 2 hours and 30 minutes (S42).

The set times are values derived from experiments, and according to the experimental results, it is possible to prevent the fermentation quality from deteriorating according to the set time.

That is, according to the control method of the microwave oven described above, the optimum temperature can be maintained during the fermentation time without exceeding the optimal temperature of the predetermined object for fermentation of the food.

Further, according to the present invention, it is possible to prevent the lactic acid bacteria from being killed as the temperature in the cooking chamber exceeds the optimum temperature of the object to be cooked for fermenting the food.

Further, according to the present invention, the period of turning on and off the output can be made constant in order to maintain the inside of the cooking chamber at an optimum temperature for fermentation of the food.

Further, according to the present invention, the control algorithm can be simplified as the on / off period of the output is made constant.

Further, according to the present invention, fermentation of food can be realized without purchasing a separate fermentation apparatus.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation, The present invention may be modified in various ways. Therefore, modifications of the embodiments of the present invention will not depart from the scope of the present invention.

10 Cabinet 20 Course input 30 Cooking chamber
40 Display unit 50 door 60 magnetron
70 inverter unit 80 power source 90 control unit

Claims (19)

A course input unit configured to input a cooking course;
A cooking chamber in which a cooking object is accommodated;
A magnetron formed to apply microwaves to the object to be cooked;
An inverter device for converting an AC voltage supplied from the power supply part into a DC voltage and supplying the DC voltage to the magnetron;
And a control unit configured to control driving of the inverter device,
When the fermentation course is input through the course input unit, the controller turns on the first on-off period in which the power is supplied to the magnetron during the first set time and the power supply to the magnetron is interrupted during the second set time, The control unit controls the inverter unit so that the inverter unit is repeated a plurality of times,
The fermentation course includes a yogurt fermentation course, a bread fermentation course, and a sikhye fermentation course,
When the course input through the course input unit is a Sikhah fermentation course, the control unit supplies power to the magnetron during the fourth set time before the first on-off cycle starts, and supplies power to the magnetron during the fifth set time The second on-off period in which the power supply is interrupted is repeated a plurality of times during the sixth set time,
And the fourth set time is longer than the first set time. The method according to claim 1,
Wherein the control unit controls the inverter unit such that an output of the magnetron is 330 watts to 440 watts when power is supplied to the magnetron. 3. The method of claim 2,
Wherein the first set time is shorter than the second set time. The method of claim 3,
Wherein at least one of the first set time, the second set time, and the third set time is changed according to a specific fermentation course input through the course input unit. 5. The method of claim 4,
When the course input through the base course input section is a yogurt fermentation course,
Wherein the first setting time is 7 seconds, the second setting time is 113 seconds, and the third setting time is 5 hours. 5. The method of claim 4,
When the course input through the course input unit is a bread fermentation course,
Wherein the first setting time is 7 seconds, the second setting time is 113 seconds, and the third setting time is 1 hour. The method according to claim 5 or 6,
Wherein the temperature of the object to be cooked is maintained at 40 占 폚 to 45 占 폚 during the third set time. delete The method according to claim 1,
The first set time of the first on-off period is 9 seconds, the second set time is 51 seconds, the third set time of repeating the first on-off period is 2 hours and 30 minutes,
Wherein the fourth set time of the second on-off period is 11 seconds, the fifth set time is 21 seconds, and the sixth set time in which the second on-off period is repeated is 2 hours and 30 minutes. range. 10. The method of claim 9,
The temperature of the object to be cooked during the sixth set time is increased from 60 DEG C to 65 DEG C from the initial temperature,
Wherein the temperature of the object to be cooked during the third set time is maintained at 60 캜 to 65 캜. 3. The method of claim 2,
Wherein the control unit controls the inverter unit so that the output of the magnetron is maintained at 330 watts when power is supplied to the magnetron. A magnetron formed to apply a microwave to a cooking object; and an inverter device for converting an AC voltage supplied from the power supply section into a DC voltage and supplying the DC voltage to the magnetron,
A course input step of inputting a fermentation course of a yogurt fermentation course, a bread fermentation course and a sikhye fermentation course through a course input part; And
Wherein the first on-off period in which power is supplied to the magnetron during a first set time and the power supply to the magnetron is cut off during a second set time is repeated a plurality of times during a third set time,
If the Sikhye fermentation course is input in the course input step,
A second on-off period during which power is supplied to the magnetron during the fourth set time and the power supply to the magnetron is interrupted during the fifth set time is repeated a plurality of times during the sixth set time, Further comprising an ascending step,
Wherein the fourth set time is longer than the first set time. 13. The method of claim 12,
Wherein power of the magnetron is maintained at 330 watts (W) to 440 watts (W) when power is supplied to the magnetron in the temperature maintenance step. 14. The method of claim 13,
Wherein at least one of the first set time, the second set time, and the third set time is changed according to a specific fermentation course input at the course input step. 15. The method of claim 14,
The first setting time of the first on-off period is 7 seconds, the second setting time is 113 seconds, and the third setting time is 5 hours when the yogurt fermentation course is input in the course input step A control method of a microwave oven 15. The method of claim 14,
The first setting time of the first on-off period is 7 seconds, the second setting time is 113 seconds, and the third setting time is one hour when the bread fermentation course is input in the course input step Of the microwave oven. delete 13. The method of claim 12,
Wherein the power of the magnetron is maintained at 330 watts (W) to 440 watts (W) when power is supplied to the magnetron in the temperature raising step. 13. The method of claim 12,
The first set time of the first on-off period is 9 seconds, the second set time is 51 seconds, the third set time of repeating the first on-off period is 2 hours and 30 minutes,
Wherein the fourth set time of the second on-off period is 11 seconds, the fifth set time is 21 seconds, and the sixth set time in which the second on-off period is repeated is 2 hours and 30 minutes. Controlling the range.

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