KR0175508B1 - An electric rice cooker - Google Patents

Abstract

The present invention relates to a cooking process control apparatus and method for electric insulation rice cooker by the recognition of voltage fluctuation, when the voltage applied to the electric rice cooker is a low voltage, the cooking time is long and the electricity is due to the phenomenon that the internal water overflows In order to solve the problem that the insulation rice cooker is a bad factor and the applied voltage is a high voltage, the cooking time is shortened and the cooking rice burns. A cooking process control device configured to include a voltage sensing sensor 20 that detects a DC voltage and inputs it to the microprocessor 10, and a DC to which the microprocessor 10 is applied by setting a reference constant based on an amount of cooking and a voltage change. Recognizes and analyzes the voltage and cooks with the proper heat quantity matching the standard constant set for the cooking quantity and voltage fluctuation It provides a control method that can prevent the badness of the system and the burning of cooked rice by overflowing the water inside when cooking with electric heat cooker, so that the heat quantity is always uniform under the cooking amount and voltage fluctuation. You can cook.

Description

Cooking Process Control Device and Method for Electric Thermos Cooker by Recognizing Voltage Variation

The present invention relates to an electric thermal rice cooker, and more particularly, by a microprocessor as a control means directly recognizing and analyzing a DC voltage generated through a power transformer before generating an electrostatic source, due to a voltage variation applied to the electric rice cooker. The present invention relates to a cooking process control apparatus and method for electric heat cooker by recognizing voltage fluctuations to actively cope with changes in cooking state and to maintain a uniform cooking state in a steady state.

As is well known, the electric thermal rice cooker is provided with the operating conditions for each process according to the respective contents, which is the process is started according to each cooking key operation after the first state that the inner pot is seated is sensed.

The general electric rice cooker, as shown in the block diagram shown in Figure 1, the key input unit 12 consisting of a key for setting the various operating environment of the electric rice cooker having a cooking function and the warming function, and the bottom and body of the electric rice cooker And a sensing unit 14 installed on a lid and detecting a temperature generated by various heaters by a sensor, and a temperature value detected by a key input of the key input unit 12 and a temperature sensor. A microprocessor 10 for controlling the operation, and a heater driver 16 installed at the bottom and the lid and the body of the electric thermal cooker and operating under the control of the microprocessor 10 to heat the inside of the electric thermal cooker; It is configured to include a display unit 18 for displaying (including a buzzer) the operating state of an electric rice cooker.

Referring to FIG. 3 for the electric insulation rice cooker, the microprocessor 10 built in the electric insulation rice cooker determines whether various cooking modes are set by key input while maintaining a standby state (S301) when operating power is input ( S302).

If it is determined that the cooking mode (jinbap, pork rice, ordinary rice, grains rice, brown rice, etc.) is not set, the key input standby state is continuously maintained (S301), and when the cooking mode is set, cooking of the heater driving unit 16 is performed. The heater, the lid heater and the body heater are operated to execute the set cooking mode (S303).

That is, it is determined whether cooking is complete by controlling the operation time or operating temperature of the cooking heater of the heater driving unit 16, the lid heater, and the body heater according to each cooking mode to perform the cooking mode (S304).

If the cooking operation is not terminated, the microprocessor 10 continues to execute the cooking mode (S303). When the operation of the set cooking mode is terminated, the cooking heater and the lid heater of the heater driving unit 16 are finished. And blocking the operation power supplied to the body heater (S305), and performing an insulation function while detecting an internal temperature of the electric thermal cooker detected by the cooking temperature sensor of the sensing unit 14 (S306) at a predetermined temperature (for example, 75). It is determined whether it is lower than (° C.) (S307).

As a result, when the internal temperature of the electric insulation rice cooker is higher than a predetermined temperature (eg 75 ° C.), the internal temperature of the electric insulation rice cooker is detected again (S306), and the internal temperature of the electric insulation rice cooker is a constant temperature (eg 75 ° C.). If lower than), the various heaters of the heater driving unit 16 are operated (S308) to increase the internal temperature of the electric thermal cooker.

Therefore, since the internal temperature of the electric rice cooker maintains a certain temperature (eg 75 ℃), it is possible to heat the rice stored inside.

Referring to the cooking process of the electric insulation rice cooker in more detail by FIG. 2, first, when the operation mode of the electric insulation rice cooker is set to the cooking mode, supply operation power to the cooking heater and lid heater and body heater of the heater driving unit 16; By increasing the internal temperature while performing a soaking process (T1) for absorbing water into the rice inside for a certain time (about 10 to 11 minutes), and the internal temperature is constant temperature (eg 45 ℃). Raise it up.

When the soaking step T1 is completed, the first heating step T2 is performed to determine the cooking amount while raising the inside to a predetermined temperature (eg, 75 ° C.) to determine the amount of rice contained therein. The heating process is terminated by performing a second heating process T3 which distributes the heat quantity based on the cooking quantity determined in the first heating process T2 and raises the internal temperature to a predetermined temperature (eg, 102 ° C.).

Then, the second heating step (T3) is extended to heat the inside to perform a boiling maintenance step (T4) for heating the inside so that the internal temperature rises to the cooking temperature (for example, 125 ℃).

After each process is completed, the cooking process is completed and the process is switched to the next process while performing the steaming process T5 of heating the cooked rice to a predetermined temperature (115 ° C.) for a predetermined time (about 12 minutes).

In the conventional electric thermal rice cooker, the cooking process is changed by heating the heater to the cooking completion temperature (eg, 125 ° C.) regardless of the voltage change applied during cooking.

That is, when the voltage applied to the electric rice cooker is lower than the specified value, the cooking time determination time, which is cooking completion time, becomes long, and the process after the cooking quantity determination does not set the heating amount more accurately than the cooking amount. .

In addition, when the voltage applied to the electric insulation rice cooker is higher than the prescribed value, the cooking time determination time, which is the time for cooking is shortened, and the process after the cooking amount determination cannot set the heat amount more accurately than the cooking amount.

Therefore, according to the voltage fluctuation applied to the electric rice cooker, the cooking state is not uniform and it is difficult to produce a good state.

For example, when the voltage applied to the electric rice cooker is a low voltage, the cooking time is long, and the water inside is overflowed, which is a bad factor of the electric rice cooker system, while the applied voltage is a high voltage. In the case that the cooking time is shortened, such as the phenomenon of burning cooked rice has occurred.

The present invention has been made to solve the above-mentioned problems, for that purpose, the microprocessor as a control means directly recognizes / analyzes the DC voltage generated through the power transformer before generating the electrostatic source to the electric insulation rice cooker. Actively copes with changes in cooking state due to applied voltage fluctuations, maintains uniform cooking state in steady state, controls abnormal cooking operation in voltage fluctuation state, and always heats evenly under cooking amount and voltage fluctuation. To be able to perform cooking.

Another object of the present invention is to control the cooking abnormal operation in the voltage fluctuation state, it is possible to prevent the defect of the system caused by the phenomenon of the overflow of the water inside when the voltage applied to the electric rice cooker is low voltage. It is in such a way.

Another object of the present invention is to control the cooking abnormal operation in the voltage fluctuation state, so that the cooked rice can be prevented from burning when the applied voltage is a high voltage.

In order to achieve the above object, in the present invention, the microprocessor 10 for controlling the electric rice cooker, the key input unit 12 for inputting cooking data, the sensing unit 14 having various sensors, and the heater driving In the electric heating rice cooker having a heater driving unit 16 for heating each unit by the heating unit, and a display unit 18 for displaying the cooking process, a voltage sensing sensor for inputting the DC voltage generated by the power transformer to the microprocessor 10 ( 20) a cooking process control device configured to include and a reference constant based on the cooking quantity and the voltage variation, and the DC voltage applied by the microprocessor 10 to recognize and analyze the reference constant set according to the cooking quantity and the voltage variation and It is a well-known feature of the present invention to provide a control method capable of carrying out cooking with a suitable amount of calories.

1 is a block diagram showing a conventional general electric rice cooker.

Figure 2 is a graph showing the cooking process of a general electric rice cooker.

Figure 3 is a flow chart showing a general electric rice cooker operating state.

Figure 4 is a block diagram showing the cooking process control apparatus of the electric rice cooker by the voltage fluctuation recognition for solving the present invention.

5a to 5c is a flow chart showing a cooking process control process of the electric rice cooker by the voltage change recognition for solving the present invention.

Explanation of symbols on the main parts of the drawings

10 microprocessor 12 key input unit

14 detection unit 16 heater driving unit

18: display unit 20: voltage detection sensor

T1: soaking process T2: first heating process

T3: 2nd heating process T4: Boiling process

T5: Moxibustion Process

The configuration of the electric insulation rice cooker according to an embodiment of the present invention, the key input unit 12 consisting of a key for setting the various operating environment of the electric insulation rice cooker having a cooking function and the insulation function, and the bottom and body and lid of the electric insulation rice cooker And a sensing unit 14 for detecting a temperature generated by various heaters by a sensor and a temperature value detected by a key input and a temperature sensor of the key input unit 12 to control the operation of the rice cooker. The microprocessor 10 to control, and the heater drive unit 16 which is installed on the bottom and the lid and the body of the electric thermal rice cooker and operates under the control of the microprocessor 10 to heat the inside of the electric thermal rice cooker, and the electric In an electric rice cooker having a display unit 18 for displaying (including a buzzer) the operating state of the rice cooker, a voltage sense for inputting the DC voltage generated in the power transformer to the microprocessor 10 Constitute presented further comprising a sensor (20).

5a to 5c is a flow chart showing a cooking process control process of the electric rice cooker by the voltage variation recognition for solving the present invention.

Setting a reference voltage (eg, 6.0 V) of the electric rice cooker (S501), setting a reference voltage and a reference constant (eg, a reference constant value 10) according to the applied voltage (S502), and detecting voltage Receiving the DC voltage generated from the power transformer through the sensor (S503), and when the DC voltage is input (S504) to analyze the AC voltage and DC voltage, and calculates the analyzed AC / DC voltage by the set program In operation S505, determining whether the calculated voltage is 6.9 V or more (S506), and when the determined result is 6.9 V or more, the reference constant is determined to be 13 (S506-1), and when 6.9 V or less, the calculated value is calculated. Determining whether the voltage is 6.6V or more (S507), and if the determined result is 6.6V or more, the reference constant is determined as 12 (S507-1), and if 6.6V or less, it is determined whether the calculated voltage is 6.3V or more. Step S508, and if the determined result is 6.3V or more, the reference constant is determined as 11 (S508-1), and if 6.3V or less, the calculated voltage (S509) determining whether or not 6.0V or more, and if the determination result is 6.0V or more, the reference constant is determined as 10 (S509-1), and when 6.0V or less, determining whether the calculated voltage is 5.7V or less ( S510), if the determined result is 5.7V or more, the reference constant is determined as 10 (S509-1), and if 5.7V or less, determining whether the calculated voltage is 5.4V or less (S511), and the determined result 5.4V If it is above, the reference constant is determined to be 9 (S511-1), and if it is 5.4V or less, it is determined whether the calculated voltage is 5.1V or less (S512). S512-1), and if the reference constant is determined to be 7 when the reference constant is equal to or less than 5.1 (S513), setting the determined reference constant when the reference constant is determined as in the step S506S513 (S514), and the reference constant If it is set, the step of waiting for a key input (S515), the step of determining whether the cooking mode setting key is on while waiting for key input (S516), and the plate As a result, if the cooking mode setting key is off, the process returns to step S515, and if the cooking mode setting key is on, determining whether the cooking key is on (S517); Executing (S517-1) and performing the soaking process when the cooking is on (S518); determining whether the internal temperature is 45 占 폚 when the soaking process is performed (S519); Otherwise, the process returns to step S518, and if it is 45 ° C., performing the first heating process (S520); if the first heating process is performed, determining whether the internal temperature is 75 ° C. (S521), and the determined result If the temperature is not 75 ° C., heating the heater and then returning to step S521 (S521-1), and if the internal temperature is 75 ° C. as a result of the determination in step S 520, completing the cooking quantity determination (S522); Calculating a cooking quantity of which determination has been completed (S523), determining a calorific value of the calculated cooking quantity (S524), When the calorific value of the cooking amount is determined, performing a second heating process (S525), performing a boiling-holding process when the second heating process is performed (S526), and performing a boiling-holding process, the internal temperature is 125 ° C. Step (S527) to determine the application, and if the result is not 125 ℃ return to step (S526), if the 125 ℃ to perform the moxibustion step (S528), and if the moxibustion process is carried out the step of performing the heat retention process It is shown that (S529).

Looking at the present invention as described above in detail.

When the operation power is supplied to the electric rice cooker, the user sets the reference voltage of the electric rice cooker to 6.0 V in a memory (not shown) built in the microprocessor 10 through the key input unit 12 (S501). Based on the reference voltage of 6.0V, the reference constant of the cooking quantity to be cooked is set (S502).

An example of the calorie periodicity by setting a reference constant according to the amount of cooking is shown in the table as follows.

Voltage Amount Standard constant below 75.1V Standard constant below 85.4V Standard constant below 95.7V Reference constant 105.7 V 6.3 V 11 Constant Constant Constant Standard constant 126.7V or more 136.9 V or more One 80% 76% 73% 70% 67% 64% 60% 2 85% 81% 78% 75% 72% 69% 65% 3 90% 86% 83% 80% 77% 74% 70% 4 95% 91% 88% 85% 82% 79% 75% 5 100% 96% 93% 90% 87% 84% 80%

(Standard constant 10: steady state recognition)

When the reference constant according to the cooking quantity is set as shown in Table 1, the microprocessor 10 receives the DC voltage generated from the power transformer (not shown) through the voltage sensor 20 (S503).

That is, when the DC voltage is input, the microprocessor 10 analyzes the initially supplied AC voltage and DC voltage (S504) and calculates the analyzed AC voltage and DC voltage by the set program (S505).

When the AC / DC voltage is calculated, the microprocessor 10 determines whether the DC voltage detected and input by the voltage sensor 20 is 6.9V or more (S506).

As a result of the determination, when the input DC voltage sensed by the voltage sensor 20 is 6.9 V or more, the microprocessor 10 determines the reference constant as 13 (S506-1), and when the cooking quantity is 1 serving, the above-mentioned Table 1 As shown in FIG. 6, the cooking calorie value is set at 60%, the cooking calorie value is set at 65% when the cooking quantity is 2 servings, the cooking calorie value is set at 70% when the cooking quantity is serving 3, and when the cooking quantity is 4 servings. The cooking calorie value is set to 75%, and when the cooking amount is 5 servings, the cooking calorie value is set to 80%.

However, if the DC voltage sensed by the voltage detecting sensor 20 and the input DC voltage is 6.9V or less, the microprocessor 10 determines whether the input DC voltage is 6.6V or more (S507).

As a result of the determination, when the input DC voltage detected by the voltage sensor 20 is equal to or greater than 6.6 V, the microprocessor 10 determines the reference constant as 12 (S507-1), and when the cooking quantity is one serving, the table 1 As shown in the figure, the cooking calorie value is set at 64%, the cooking calorie value is set at 69% when the cooking quantity is 2 servings, the cooking calorie value is set at 74% when the cooking quantity is serving 3, and when the cooking quantity is 4 servings. The cooking calorie value is set to 79%, and when the cooking amount is 5 servings, the cooking calorie value is set to 84%.

However, if the DC voltage sensed by the voltage detecting sensor 20 and the input DC voltage is 6.6V or less, the microprocessor 10 determines whether the input DC voltage is 6.3V or more (S508).

As a result of the determination, if the input DC voltage detected by the voltage sensor 20 is equal to or greater than 6.3 V, the microprocessor 10 determines the reference constant as 11 (S508-1), and when the cooking quantity is one serving, the table 1 As shown in FIG. 6, the cooking calorie value is set at 67%, the cooking calorie value is set at 72% when the cooking quantity is 2 servings, the cooking calorific value is set at 77% when the cooking quantity is 3 servings, and when the cooking quantity is 4 servings. The cooking calorie value is set to 82%, and when the cooking amount is 5 servings, the cooking calorie value is set to 87%.

However, if the DC voltage sensed by the voltage detecting sensor 20 and the input DC voltage is less than or equal to 6.3V, the microprocessor 10 determines whether the input DC voltage is 6.0V or more (S509).

As a result of the determination, when the input DC voltage detected by the voltage sensor 20 is 6.0 V or more, the microprocessor 10 determines the reference constant as 10 (S509-1), and when the cooking quantity is one serving, the table 1 As shown in the figure, the cooking calorie value is set at 70%, the cooking calorie value is set at 75% when the cooking quantity is 2 servings, the cooking calorie value is set at 80% when the cooking quantity is 3 servings, and when the cooking quantity is 4 servings. The cooking calorie value is set to 85%, and when the cooking amount is 5 servings, the cooking calorie value is set to 90%.

However, if the DC voltage sensed by the voltage detecting sensor 20 and the input DC voltage is 6.0V or less, the microprocessor 10 determines whether the input DC voltage is 5.7V or less (S510).

As a result of the determination, when the input DC voltage detected by the voltage sensor 20 is equal to or greater than 5.7 V, the microprocessor 10 determines the reference constant as 10 (S509-1), and when the cooking quantity is one serving, the table 1 As shown in the figure, the cooking calorie value is set at 70%, the cooking calorie value is set at 75% when the cooking quantity is 2 servings, the cooking calorie value is set at 80% when the cooking quantity is 3 servings, and when the cooking quantity is 4 servings. The cooking calorie value is set to 85%, and when the cooking amount is 5 servings, the cooking calorie value is set to 90%.

However, if the DC voltage sensed by the voltage detecting sensor 20 and the input DC voltage is 5.7V or less, the microprocessor 10 determines whether the input DC voltage is 5.4V or less (S511).

As a result of the determination, when the DC voltage detected by the voltage sensor 20 is greater than or equal to 5.4 V, the microprocessor 10 determines the reference constant as 9 (S511-1), and when the cooking quantity is 1 serving, the table 1 As shown in FIG. 5, the cooking calorie value is set at 73%, the cooking calorie value is set at 78% when the cooking quantity is 2 servings, the cooking calorie value is set at 83% when the cooking quantity is serving 3, and when the cooking quantity is 4 servings. The cooking calorie value is set to 88%, and when the cooking amount is 5 servings, the cooking calorie value is set to 93%.

However, if the DC voltage sensed by the voltage sensor 20 and detected as input in step S511 is 5.4V or less, the microprocessor 10 determines whether the input DC voltage is 5.1V or less (S512).

As a result of the determination, when the DC voltage detected and input by the voltage sensor 20 is equal to or greater than 5.1V, the microprocessor 10 determines the reference constant as 8 (S512-1), and when the cooking quantity is one serving, the table 1 As shown in the figure, the cooking calorie value is set at 76%, the cooking calorie value is set at 81% when the cooking quantity is 2 servings, the cooking calorie value is set at 86% when the cooking quantity is serving 3, and when the cooking quantity is 4 servings. The cooking calorie value is set to 91%, and when the cooking amount is 5 servings, the cooking calorie value is set to 96%.

However, when the DC voltage sensed by the voltage detecting sensor 20 and the input DC voltage is 5.1 V or less is determined in step S512, the microprocessor 10 determines the reference constant as 7 (S513). As shown in Table 1, the cooking calorie value is set at 80%, the cooking calorie value is set at 85% when the cooking quantity is 2 servings, and the cooking calorie value is set at 90% when the cooking quantity is 3 servings, and the cooking quantity is 4%. The cooking calorie value is set to 95% when serving, and the cooking calorie value is set to 100% when cooking quantity is 5 servings.

When the reference constant is determined as in step S506S513, the microprocessor 10 sets the determined reference constant in the internal memory (not shown) (S514).

When the reference constant is set, the microprocessor 10 waits for a key input input from the key input unit 12 (S515), and then determines whether the cooking mode setting key of the key input unit 12 is on (S516).

If the cooking mode setting key is off, the microprocessor 10 returns to step S515 to wait for the key input again. If the cooking mode setting key is on, the microprocessor 10 returns to the key input unit 12. It is determined whether the cooking key is on (S517).

When the cooking key of the key input unit 12 is in the off state, the microprocessor 10 executes the existing operation (S517-1) to maintain the key input standby state, and the cooking key of the key input unit 12 is turned on. If the state is carried out a soaking process called the contents contained in the electric rice cooker (S518) to determine whether the internal temperature of the electric rice cooker detected by the sensing sensor of the detector 14 is 45 ℃ (S519).

As a result of the determination, if the internal temperature of the rice cooker is not 45 ° C., the microprocessor 10 returns to step S518 to perform the soaking process again, and if the temperature of the electric rice cooker is 45 ° C., the heater of the heater driving unit 16. Heat to perform a first heating step (S520).

When the first heating process is performed, the microprocessor 10 determines whether the internal temperature of the electric rice cooker detected and input by the sensing sensor of the sensing unit 14 is 75 ° C. (S521).

As a result of the determination, if the internal temperature of the electric rice cooker is not 75 ° C., the microprocessor 10 heats the heater of the heater driving unit 16 (S521-1) and returns to step S521 to detect the sensing unit 14. It is again determined whether the temperature inside the electric rice cooker detected by the sensor is 75 ° C.

As a result of the determination, when the internal temperature of the electric thermal cooker is 75 ° C., the microprocessor 10 completes the determination of the cooking amount (S522), and calculates the cooking amount and the reference voltage as shown in Table 1 (S523). Determine the amount of heat (S524).

When the calorific value of the cooking amount is determined, the microprocessor 10 heats the heater of the heater driver 16 to perform the second heating process (S525) and ends the heating process.

When the second heating process is performed, the microprocessor 10 heats the heater of the heater driving unit 16 to heat the inside of the electric rice cooker so that the internal temperature of the electric rice cooker is increased to the cooking temperature (eg, 125 ° C.). The maintenance process is performed (S526) to determine whether the internal temperature of the electric rice cooker detected and input by the sensor of the detection unit 14 is 125 ℃ (S527).

As a result of the determination, if the internal temperature of the electric rice cooker is not 125 ° C, the microprocessor 10 returns to step S526 to perform the boiling maintaining process again, and if the internal temperature of the electric rice cooker is 125 ° C, perform the moxibustion process. The cooked cooked rice is heated to a predetermined temperature (for example, 115 ° C.) for a predetermined time (about 12 minutes) and then a thermal insulation process is performed (S529).

As described above, in the present invention, the microprocessor, which is a control means, directly recognizes and analyzes a DC voltage generated through a power transformer to actively cope with a change in cooking state due to a voltage change applied to an electric thermostat rice cooker. By maintaining the cooking state uniformly, when the voltage applied to the electric rice cooker is a low voltage, the cooked rice when the voltage of the system and the bad phenomenon of the system caused by the overflow of the water inside out phenomenon The burning phenomenon is prevented in advance so that the amount of heat can be cooked uniformly in the state of cooking and voltage fluctuations.

The present invention has been described only with respect to an embodiment of the cooking process control apparatus and method of the electric heat cooker by the voltage fluctuation recognition as described in the claims, the present invention is not limited to this and various Log applications and modifications will be possible.

Claims (9)

A microprocessor 10 for controlling an electric rice cooker, a key input unit 12 for inputting cooking data, a sensing unit 14 having various sensors, and a heater driving unit 16 for heating each unit by heater driving. And, electric heating rice cooker cooking process control apparatus having a display unit 18 for displaying the cooking process, the voltage sensor 20 for inputting the DC voltage generated in the power transformer to the microprocessor 10 is configured to include Cooking process control apparatus of electric thermal rice cooker by the voltage fluctuation recognition. In the cooking process control method of the electric rice cooker, by setting the reference constant by the cooking amount and the voltage variation, the microprocessor recognizes and analyzes the DC voltage applied to the standard set for the cooking quantity and the voltage variation (5.1V6.9V) A method of controlling the cooking process of an electric rice cooker by recognizing voltage fluctuations to perform cooking with an appropriate heat quantity consistent with the constant (713). The method according to claim 2, wherein the reference constant is set to 13 when the DC voltage applied to the microprocessor is 6.9 V or more. The method according to claim 2, wherein the reference constant is set to 12 when the DC voltage applied to the microprocessor is 6.6V or more. The method according to claim 2, wherein the reference constant is set to 11 when the DC voltage applied to the microprocessor is 6.3 V or more. The method according to claim 2, wherein the reference constant is set to 10 when the DC voltage applied to the microprocessor is 5.7V or more or 6.3V or less. The method according to claim 2, wherein the reference constant is set to 9 when the DC voltage applied to the microprocessor is 5.7 V or less. The method according to claim 2, wherein the reference constant is set to 8 when the DC voltage applied to the microprocessor is 5.4V or less. The method according to claim 2, wherein the reference constant is set to 7 when the DC voltage applied to the microprocessor is equal to or less than 5.1V.