KR19990021212A - Cooking Process Control Method for Detecting Abnormal High Temperature in Electric Rice Cooker - Google Patents

Abstract

The present invention relates to a method for automatically controlling a heat supply device of an electric rice cooker, and more particularly, to a driving control method of a cooking heater when an abnormal high temperature is detected during an electric rice cooker cooking process. )Wow; A timer 210; A heater and heater driver 300; In the control method of the cooking process of the electric thermal rice cooker having a temperature sensor (110, 120) for measuring the temperature of the inner pot contents,

When a temperature value that is an abnormal process performance requirement is detected at either of the temperature sensors at the time of starting the cooking process (YES in S30 and S31), the microprocessor 200 performs a normal cooking process for a predetermined time. A first process (S51, S52) of driving the heater driver 300 according to the present invention; A second step (S53, S54) of re-checking whether the temperature is abnormal high temperature using the temperature sensor after the first step; When the abnormal high temperature is the result of the second process, the abnormal cooking process is performed (S57). If the result is not the abnormal high temperature, the normal cooking process is performed (S55).

Description

Cooking Process Control Method for Detecting Abnormal High Temperature in Electric Rice Cooker

The present invention relates to a method of automatically controlling the heat supply device of the electric rice cooker, and more particularly, to a drive control method of the cooking heater when abnormal high temperature is detected during the electric rice cooker cooking process.

As is well known, the electric thermal rice cooker is a home appliance that heats rice and heats rice which is placed in the inner pot and then warms the rice. Referring to FIG. It is.

That is, a key input unit (not shown) consisting of keys for the user to set various operation modes of the electric thermal cooker, a display unit (not shown) for displaying the user's various operation states of the electric thermal cooker, and for cooking There is a heater for heating the inside of the rice cooker, a heater driving unit 300 for driving the heater, and a microprocessor 200 for controlling various operations of the electric rice cooker.

In addition, there is a temperature sensor (110, 120) is installed on the bottom and the body and the lid of the electric rice cooker to detect the temperature generated by each part. Since electric heat cooker is cooking by heating the material with a heater, a temperature sensor for detecting the temperature change with heating is necessary for the proper cooking process. Further, the microprocessor incorporates a timer 210 to control the heating process for a suitable time.

Brief description of the general cooking process of the electric thermal rice cooker of the above configuration as follows.

The first process of cooking is the soak process. If the temperature sensor detects 45 ° C. as the temperature of the inner pot contents, a second heating process is now performed, which is heated to 70 ° C. by the first heating process and then to 102 ° C. with a strong fire (very large heating amount). Thus, when boiling occurs, it is heated to 130 ° C. at which the moxibustion process is started by the boiling maintenance process.

On the other hand, in the cooking process which heats for a long time as mentioned above, when an abnormal high temperature is detected in order to prevent the overheating phenomenon by a heater, it has a function which cancels the cooking process. That is, when the detection temperature of the center temperature sensor 110 is 75 ° C. or the detection temperature of the lid temperature sensor 120 is 60 ° C. during the soaking process, the cooking process is canceled. This is because there is a risk of fire when the first and second heating processes are performed at such a high temperature from the cooking 1 step (soaking step).

And, when the temperature detected at the beginning of the cooking process is at a certain level (center temperature sensor is 65 ° C or the lid temperature sensor is 50 ° C), it is a case of abnormality in a cooker state or hot material (water) is added. Cooking is carried out as long as it is not a normal cooking process. The abnormal step means cooking by the heating amount and the heating time of the degree not to overheat. In general, cooking takes place in a short time.

Conventionally, as described above, the requirement that the abnormal process is performed is a numerical value of the temperature detected by the temperature sensor. However, the temperature sensing signal output from the temperature sensors 110 and 120 to the microprocessor 200 is a detection signal for the cooking start point. That is, when water of relatively high temperature (about 60 ° C.) is poured, the temperature sensor detects the 60 ° C. at the start of cooking. In fact, after a few minutes, the thermal equilibrium can be at a temperature that is sufficient to perform a normal cooking process. This situation occurs when the user pours moderately lukewarm water for quick cooking.

That is, the conventional process of performing abnormal process at the time of abnormal high temperature detection at the beginning of cooking does not distinguish whether there is a problem of the heating system of the rice cooker or the high temperature state intended by the user, and always performs the abnormal process to prevent overheating of the rice cooker system. By doing this, there is a problem that the cooking state is not good.

A characteristic of the present invention for achieving the above object, in the cooking process by checking the temperature at the beginning of the cooking in the electric rice cooker, the cooking process control method at the time of abnormal high temperature detection to perform a temperature process suitable for the state of the rice cooker heating system It is about.

Figure 1 is a block diagram showing the main devices for applying the present invention in a conventional electric rice cooker.

Figure 2 is a flow chart showing a cooking process control method when detecting abnormal high temperature according to the present invention.

Explanation of symbols for main parts of the drawings

110: center temperature sensor 120: lid temperature sensor

200: microprocessor 210: timer

300: heater driving unit

Features of the present invention for achieving the above object, the microprocessor 200 for controlling various operation matters; A timer 210 for controlling a heater driving time; A heater and a heater driver 300 for heating the inner pot contents; In the control method of the cooking process of the electric thermal rice cooker having a temperature sensor for measuring the temperature of the inner pot contents,

When a temperature value that is an abnormal process performance requirement is detected at either of the temperature sensors at the time of starting the cooking process (YES in S30 and S31), the microprocessor 200 performs a normal cooking process for a predetermined time. A first process (S51, S52) of driving the heater driver 300 according to the present invention; A second step (S53, S54) of re-checking whether the temperature is abnormal high temperature using the temperature sensor after the first step; If the result of the second process is an abnormal high temperature temperature is to perform an abnormal cooking process (S57), if the result is not the abnormal high temperature comprises a third process of performing a normal cooking process (S55).

An essential apparatus of the electric rice cooker for the temperature control method in the thermal insulation process according to the invention is shown in FIG.

In FIG. 1, as shown in the center temperature sensor 110 and the lid temperature sensor 120 in the lid portion of the inner pot, a conventional electric rice cooker has two temperature sensors for such proper temperature control, One temperature sensor is also sufficient for the present invention. The microprocessor 200 receives the temperature sensing signals of the temperature sensors 110 and 120 and checks whether the numerical value is equal to or higher than the abnormal high temperature temperature set at the time of manufacture.

When the abnormal high temperature is detected at the start of cooking, the timer 210 proceeds to the normal cooking process for about 5 minutes, and is required to see the temperature again, and is usually built in the microprocessor 200 again. When the checked temperature is still detected as an abnormal high temperature, the microprocessor 200 controls the amount of heat generated by the heater driver 300 according to the abnormal cooking process set at the time of manufacturing or by the user based on the cooking quantity of 3 servings.

Hereinafter, with reference to the accompanying drawings, Figure 2 looks at a preferred embodiment of the operation according to the present invention.

2 is a flowchart illustrating a cooking process control method at the time of abnormal temperature detection according to the present invention.

When the rice cooker is connected to a commercial power source, and the user turns on the cooking key, the microprocessor 200 detects the temperature of the inner pot contents using the temperature sensors at the beginning of cooking (S10). That is, it is checked whether the detected temperature value from the center temperature sensor 110 is, for example, 75 ° C. or higher (S20) or the detection temperature of the lid temperature sensor 120 is 60 ° C. (S21). If so (Yes), when the cooking process is advanced, the cooking process is canceled because it is a high temperature state that there is a risk of overheating (S22).

Alternatively, as a result of the check of the initial temperature of cooking (S10), the detected temperature value from the center temperature sensor 110 is, for example, 65 ° C. or higher (S30) or the detection temperature of the lid temperature sensor 120 is 50 ° C. Check (S31). Then (Yes), because it means that it is dangerous to proceed with the normal cooking process, in the present invention waits for the cooking process (S50). If not, there is no abnormality with respect to temperature, and the microprocessor 200 controls the heater driver 300 according to a normal cooking process (S40).

The cooking process atmosphere (S50) is once the heater driving unit 300 is driven so that the heating amount according to the normal cooking process is transmitted to the inner pot (S51). The microprocessor 200 checks the time using the built-in timer 210 to perform the normal process only for a predetermined time (for example, 5 minutes) (S52). After 5 minutes (Yes), the temperature of the inner pot is checked again using the temperature sensors (S53, S54). In other words, after the heating system is operated for a short time in addition to the temperature at the start of cooking, it is checked whether it is abnormal.

When the result of the temperature check again, if the detection temperature of the center temperature sensor 110 or the lid temperature sensor 120 is still abnormally high temperature (Yes), the cooking quantity is set to 3 servings as an example (S56), The above cooking process is performed (S57). On the other hand, if it is not abnormal high temperature (no), the normal cooking process is now performed (S55). This is to perform a soaking process, a 1st, 2nd heating process, etc. as mentioned above.

When the above cooking process (S57) or the normal cooking process (S55 or S40) is performed cooking is performed (S60).

In the present invention operating as described above, when abnormal temperature is detected at the beginning of cooking, the process can be performed for a predetermined time, and then the temperature of the cooker system can be more clearly checked by checking whether the temperature is abnormal. If it turns out to be in the final normal state, the cooking process can be automatically proceeded normally so that the use of the user becomes more convenient.

Claims (2)

A microprocessor 200 for controlling various operations; A timer 210 for controlling a heater driving time; A heater and a heater driver 300 for heating the inner pot contents; In the control method of the cooking process of the electric thermal rice cooker having a temperature sensor for measuring the temperature of the inner pot contents, When a temperature value that is an abnormal process performance requirement is detected at any one of the temperature sensors at the start of the cooking process, the microprocessor 200 performs the heater driving unit 300 according to a normal cooking process for a predetermined time. First process (S51, S52) for driving the; A second step of checking again whether the temperature is abnormal high temperature using the temperature sensor after the first step; The abnormal high temperature detection is performed when the abnormal high temperature is the result of the second process (S57), and when the result is not the abnormal high temperature, the abnormal high temperature detection comprises a third process (S55). How to control the catering process. The method of claim 1, wherein the third process further comprises a serving amount setting step (S56) in which the cooking amount is set to be performed on a predetermined serving basis when the abnormal cooking temperature is performed when the abnormal high temperature temperature is detected. Cooking process control method at the time of abnormal high temperature detection.