KR100671828B1 - Installation for controlling cooking of microwave oven and method thereof - Google Patents

Abstract

In the present invention, disclosed is a cooking control apparatus and method for a microwave oven for preventing the curing of the cooked food is completed microwave.

According to the present invention, in the microwave cooking control apparatus for controlling the cooking mode of the microwave, the cooking control apparatus of the microwave performs the operation control of the magnetron according to the cooking mode of the microwave, the cooking mode of the microwave After the end, if the current temperature of the cooking chamber is less than the reference value, the microcomputer having a hot air control mode for maintaining the cooking chamber temperature for a predetermined time by controlling the drive the magnetron and the convection fan; A temperature sensor for measuring a temperature of the cooking chamber and providing a measurement result to the microcomputer; And a drive relay for independently controlling the convection fan.

Accordingly, the present invention maintains the temperature of the food seated in the cooking chamber for a predetermined time after the thawing cooking mode or the convection mode of the microwave is completed, so as to be appropriately maintained between a room temperature and a protein coagulation temperature such as a hot air of 30 ° C. , It is effective to prevent hardening of the cooked food.

Microwave, cooking mode, thawing, convection, convection pan, cooking chamber, temperature

Description

INSTALLATION FOR CONTROLLING COOKING OF MICROWAVE OVEN AND METHOD THEREOF}

1 is a cross-sectional view illustrating a conventional convection microwave oven.

2 is a configuration diagram illustrating a microwave oven according to the present invention.

3 is a flowchart for explaining the main operation of the present invention.

<Explanation of symbols for main drawings>

203: door switch 205: high voltage transformer

207: microcomputer 209: relay unit

213: drive relay 217: cavity lamp

219 fan motor 223 convection heater

225: temperature sensor 227: key panel

The present invention relates to a microwave oven, and more particularly, a cooking control apparatus of a microwave oven capable of suppressing hardening of foods by maintaining a temperature of a chamber inside a room after the thawing mode of the microwave oven is performed; It is about a method.

In general, microwaves that cook foods by dielectric heating using frictional heat caused by the translational motion of water molecules contained in foods by irradiating the foods with microwaves generated from magnetrons greatly increase the cooking time of foods by high thermal efficiency. It has been widely used in recent years because it can reduce the loss of nutritional value during the cooking, thawing and warming of food.

In particular, recently developed microwave ovens are equipped with a heat transfer heater and a convection fan using a resistance heat in the cooking chamber to directly cook the surface of the food by the heat of the heat transfer heater together with the cooking function of the ultra-high frequency like a conventional microwave oven. It is possible to cook foods that require browning of the surface such as bread or fish. 1 shows the upper heat transfer heater 110 and the rear heat transfer heater 110 and 120 mounted inside the cooking chamber 150, respectively, with the heating of the food by the ultra-high frequency of the heat transfer heater 110 and the rear heat transfer heater 120. It is sectional drawing which shows an example of the convection type microwave oven 200 which heats the surface of food in accordance with operation | movement.

As described above, the convection type microwave oven 200 is equipped with electric heaters 110 and 120 on the ceiling of the cooking chamber 150 and the rear of the cooking chamber, respectively, separately from the magnetron generating ultra high frequency according to the supply of the high voltage. It is made of a structure in which the convection fan 130 that operates in conjunction with the heat generated in the heat transfer heater (110,120) to the rear.

Such a conventional convection type microwave oven 200 is formed by the heat transfer heater 120 installed on the rear side by operating the convection fan 130 together with the heat generated by the heat transfer heaters 110 and 120 mounted on the upper and rear sides of the cooking chamber 150. The heated air is circulated in the cooking chamber 150, and at the same time, the heat generated from the upper heat transfer heater 110 is directly transferred to the food water placed in the tray 160 to heat the surface of the food.

However, the heat of the heat transfer heaters 110 and 120 mounted on the back and the upper part in the cooking process of the food by the microwave oven 200 is effectively transferred to the food by being transferred to the food according to the operation of the convection pan 130. However, since the cooking is not kept warm, the food is cured.

That is, after the microwave is cooked by performing the thawing cooking mode, the food settled in the chamber is left at room temperature, and the moisture of the food is evaporated and cured. This results in the user lowering the satisfaction of the microwave, and improvement of the cooking program of the microwave is required.

The present invention has been made to solve the above problems, and an object of the present invention is to maintain the temperature of the high room chamber at a suitable level so that the food is not left at room temperature after the thawing cooking mode of the microwave is completed, It is to provide a cooking control apparatus and method for a microwave oven which can prevent hardening and improve the functionality of the microwave oven.

In the microwave cooking control apparatus according to the first aspect of the present invention for achieving the above object, the cooking control apparatus of the microwave for controlling the cooking mode of the microwave, the cooking control apparatus of the microwave oven To operate the magnetron according to the cooking mode of the oven, and after the cooking mode of the microwave is finished, when the current temperature of the cooking chamber is lower than the reference value, by controlling the driving of the magnetron and the convection fan to maintain the cooking chamber temperature for a predetermined time for a predetermined time. Micom having a hot air control mode for; A temperature sensor for measuring a temperature of the cooking chamber and providing a measurement result to the microcomputer; And a drive relay for independently controlling the convection fan.

According to a preferred embodiment of the present invention, the reference temperature of the cooking chamber is 20 ℃ to 22 ℃, the setpoint temperature of the cooking chamber is characterized in that the 25 ℃ ~ 35 ℃.

In addition, the microcomputer operates the magnetron in the thawing mode in order to sequentially operate the high output, the medium output, and the low output in the driving control of the magnetron, and repeats the same time for each output.

In addition, the predetermined time period during which the hot air control mode is operated is characterized in that the time before opening the door of the microwave oven.

On the other hand, the thawing control method of the microwave oven according to the second aspect of the present invention for achieving the above object, a) measuring the temperature of the cooking chamber when the cooking mode of the microwave is finished; b) when the temperature of the cooking chamber is lower than a reference value, operating the magnetron according to a predetermined control pattern to increase the temperature of the cooking chamber; c) operating a convection fan; d) determining whether a current temperature of the cooking chamber reaches a set value, and if the temperature of the cooking chamber does not reach a set value, feeding back to the step b); And e) determining whether a predetermined time has elapsed when the current temperature of the cooking chamber reaches a set value, and feeding back to the step b) if the predetermined time has not elapsed, otherwise initializing the microwave oven. Characterized in that the end of the flow.

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

2 shows a cooking control apparatus for a microwave oven according to the present invention. As shown, the cooking control apparatus of the microwave oven is a low voltage transformer 201 for receiving the commercial power (AC) to convert to a low voltage, a high voltage transformer 205 for driving the magnetron, the magnetron according to the cooking mode of the microwave oven Hot air control mode for maintaining the cooking chamber temperature at a set value by performing the operation control of the microwave, and after the thawing cooking mode of the microwave is finished, and the current temperature of the cooking chamber is lower than the reference value, by controlling the driving of the magnetron and the convection pan 221. A microcomputer 207 having a microwave oven, a key panel 227 for selecting a cooking mode of the microwave oven and the hot air control mode, and a fan motor 219 and a cavity lamp 217 according to the cooking mode of the microcomputer 207. , A relay unit 209 for operating the convection heater 223, the convection fan 221, and the high voltage transformer 205, and measure the temperature of the cooking chamber, and measure the measurement result to the microcomputer 207. And a temperature sensor 225 for providing.

The relay unit 209 includes a driving relay 213 for independently controlling the convection fan 221. In addition, reference numeral '203' denotes a door switch switched according to opening and closing the door of the microwave oven.

3 is a flowchart for explaining the main operation of the present invention.

First, the user selects a cooking mode of the microwave, for example, a thawing mode, a convection mode, and the like by using the key panel 227, and the microcomputer 207 performs preset cooking mode control. The cooking mode control of the microcomputer 207 is performed when the door switch 203 is turned on, and the microcomputer 207 provides a switching signal to the relay unit 209 to control the cooking mode.

The relay unit 209 controls switching of the high voltage transformer 205, the convection heater 223, the fan motor 219, the cavity lamp 217, and the like in response to the switching signal of the microcomputer 207. That is, when the microcomputer 207 intends to execute the microwave thawing mode, the relay unit 209 is operated to supply power to the high voltage transformer 205 and the fan motor 219 and the cavity. The lamp 217 provides a switching signal.

Meanwhile, when the current cooking mode is the convection mode, the microcomputer 207 drives the relay unit 209 to supply power to the high voltage transformer 205 and the convection heater 223. Of course, the fan motor 219 and the cavity lamp 217 are also driven under the control of the microcomputer 207. Thereafter, when the microcomputer 207 finishes the execution of the thawing cooking mode or the convection mode, the microcomputer 207 enters the hot air control mode according to the present invention. As shown in the accompanying drawings, after performing the thawing cooking mode or the convection mode in step S301, the process proceeds to step S303 to determine whether the cooking mode, for example, the thawing cooking mode is finished.

When the thawing cooking mode is terminated as a result of the determination, the process proceeds to step S305 to measure the current cooking chamber temperature. This is to measure the temperature of the cooking chamber from the temperature sensor 225 connected to the input port of the microcomputer 207, and after the cooking of the microwave is completed in step S307 it is determined whether the temperature in the cooking chamber has reached a predetermined reference value. The microcomputer 207 sets such a reference temperature, and may be preferably set to 20 ° C to 22 ° C, which is higher than a predetermined temperature of 18 ° C to 20 ° C.

That is, the microcomputer 207 determines whether the temperature in the current cooking chamber is lower than 20 ° C. to 22 ° C. which is a preset reference temperature in step S307. The microcomputer 207 enters step S309 and controls the relay unit 209 when the temperature of the cooking chamber is continuously lowered to reach the reference temperature after the thawing cooking mode and the convection cooking mode of the microwave are finished. By supplying power to the high voltage transformer 205, the magnetron is controlled to operate.

At this time, the microcomputer 207 sequentially operates the high and medium and low output of the magnetron in the thawing mode, and may repeat the same time for each output, or for different times of the output of the magnetron. Can be controlled to repeat. If necessary, of course, the output of the magnetron can be fixed.

In this way, the microcomputer 207 drives the magnetron to increase the temperature in the cooking chamber, and the microcomputer 207 operates the convection fan 221 in step S311. This is to maintain the temperature of the cooking chamber uniformly. On the other hand, the microcomputer 207 receives the current cooking chamber temperature from the temperature sensor 225 determines whether the current temperature of the cooking chamber reaches a set value.

That is, the microcomputer 207 enters the step S313 and receives the temperature detected from the temperature sensor 225 to determine whether the current temperature reaches a predetermined temperature value, for example, 25 ° C to 35 ° C. The setpoint temperature is preferably 30 ° C., which is between room temperature (18 ° C.-20 ° C.) and the coagulation temperature of the protein (about 40 ° C.). This setpoint temperature is a temperature range for maintaining the temperature of the food at a temperature higher than room temperature, so that the water of the food does not evaporate and harden.

On the other hand, when it is determined by the microcomputer 207 that the temperature of the cooking chamber has not reached the set value, the process returns to step S309 to operate the magnetron according to the set control pattern. On the other hand, when the temperature of the current cooking chamber reaches the set value, that is, when it is determined that the temperature of the cooking chamber has reached 25 ° C ~ 35 ° C (preferably 30 ° C), the microcomputer 207 enters the step S315.

The microcomputer 207 determines whether the current hot air control mode has been performed for a predetermined time. This may define the driving time of the hot air control mode according to the user's selection, and may be set at the time of product shipment.

On the other hand, the hot air control mode in the present invention can be operated based on the user setting after the thawing cooking mode or convection mode of the microwave, or when the door switch is not opened after the thawing cooking mode or convection mode of the microwave. It may be operated automatically for a predetermined time. That is, when the hot air control mode is automatically operated or operated based on a user setting, when the door switch of the microwave oven is opened, the hot air control mode is terminated. Then, the microwave control flow according to the present invention is initialized.

In addition, in such a hot air control mode, the set time may be determined according to the weight of the food in the cooking chamber. At this time, the load sensor is mounted on the bottom surface of the cooking chamber of the microwave oven, and the microcomputer 207 of the load sensor is used. The setting time of the hot air control mode may be provided based on the detection result.

In addition, although the hot air control mode of the microwave oven disclosed in the present invention has been described as being applied to a convection microwave oven, the hot air control mode according to the present invention may be applied to a single function microwave having only a thawing cooking mode. To this end, the microwave of a single function is provided with a separate ventilation fan and a temperature sensor to uniformly distribute the temperature in the cooking chamber in the hot air control mode. Of course, it is possible to realize the hot air control mode with only a temperature sensor in a microwave oven.

As described above, the cooking control apparatus and method of the microwave according to the present invention, after the thawing cooking mode or the convection mode of the microwave is completed, while maintaining the temperature of the food seated in the cooking chamber for a predetermined time, the room temperature and protein coagulation By properly maintaining the temperature between, for example, hot air at 30 ° C., there is an effect of preventing hardening of the cooked food.

In addition, by providing a hot air control mode for preventing the curing of the food, there is an effect of extending the functionality of the microwave cooking mode to improve the completeness of the product.

While the invention has been shown and described with respect to specific preferred embodiments thereof, the invention is not limited to the embodiments described above, and is commonly used in the art to which the invention pertains without departing from the spirit of the invention as claimed in the claims. Anyone with knowledge will be able to make various variations.

Claims (10)

In the microwave cooking control apparatus for controlling the cooking mode of the microwave, The cooking control apparatus of the microwave oven controls the operation of the magnetron according to the cooking mode of the microwave, and after the cooking mode of the microwave is terminated, when the current temperature of the cooking chamber is lower than the reference value, by controlling the driving of the magnetron and the convection fan. A microcomputer having a hot air control mode for maintaining a cooking chamber temperature at a set value for a predetermined time; A temperature sensor for measuring a temperature of the cooking chamber and providing a measurement result to the microcomputer; And And a driving relay for independent control of the convection pan. The cooking control apparatus according to claim 1, wherein the cooking mode of the microwave is a thawing cooking mode or a convection mode. The cooking control apparatus of claim 1, wherein the reference temperature of the cooking chamber is 20 ° C. to 22 ° C., and the set temperature of the cooking chamber is 25 ° C. to 35 ° C. 7. The electronic device of claim 1, wherein the microcomputer sequentially operates the high and medium and low outputs in the thawing mode in the driving control of the magnetron, and repeats the same at each output. Stove's cooking controls. The microwave cooking control apparatus according to claim 1, wherein the microcomputer controls to repeat the output of the magnetron at different times in the driving control of the magnetron, or to fix the output of the magnetron. delete The electronic device of claim 1, wherein a predetermined time period during which the hot air control mode is operated is set in proportion to the weight of food in the cooking chamber, and the microcomputer is interlocked with a load sensor mounted to the bottom of the cooking chamber of the microwave oven. Stove's cooking controls. In the microwave cooking control method for operating the cooking control apparatus of the microwave according to claim 1, a) measuring the temperature of the cooking chamber when the cooking mode of the microwave is terminated; b) when the temperature of the cooking chamber is lower than a reference value, operating the magnetron according to a predetermined control pattern to increase the temperature of the cooking chamber; c) operating a convection fan; d) determining whether a current temperature of the cooking chamber reaches a set value, and if the temperature of the cooking chamber does not reach a set value, feeding back to the step b); And e) When the current temperature of the cooking chamber reaches the set value, it is determined whether a predetermined time has elapsed, and if the predetermined time has not elapsed, the feedback is returned to step b), otherwise, the microwave is initialized and flowed. Cooking control method of the microwave, characterized in that consisting of the step of ending. The cooking control method according to claim 8, wherein the cooking mode of step b) is a thawing cooking mode or a convection mode of the microwave oven. The method of claim 8, wherein the reference temperature of the cooking chamber is 20 ° C. to 22 ° C., and the set temperature of the cooking chamber is 25 ° C. to 35 ° C. 10.

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