KR19980075690A - How to detect abnormal condition of electric rice cooker - Google Patents

Abstract

The present invention relates to a method for detecting an abnormal state of an electric thermal cooker, and in particular, in performing a cooking process, a process maximum time is set, and when each process proceeds in excess of the process maximum time, this is an abnormality of the electric thermal cooker. Judging by the status, the heater stops driving, stops the cooking process, and then visually alerts the user by using a buzzer and visually indicates the abnormal state on the display to inform the user that the electric rice cooker does not operate normally, The user can quickly respond to abnormal conditions.

Description

How to detect abnormal condition of electric rice cooker

The present invention relates to a method for detecting an abnormal state of an electric thermal cooker, and in detail, when performing a cooking process, the process maximum time required for the process is set, and each process is performed in excess of the process maximum time. It judges the abnormal condition and alerts the user.

A general electric rice cooker has a cooking function and a warming function, and when the user selects the cooking function, the cooker performs a cooking function through a predetermined cooking process according to a key selected by the user.

In addition, the cooking process is performed by driving the heater to maintain the temperature suitable for the predetermined process by sensing the temperature of each part of the electric rice cooker during the cooking process and displaying the current process process through the display unit to allow the user to The change can be known, and after cooking is completed, the temperature is maintained by maintaining a constant temperature.

As such, when the electric insulation rice cooker performs the cooking process, when the cooking process cannot be completed normally due to an abnormality in power, abnormal operation of the heater, poor seating state of the inner pot, or poor heat transfer due to foreign matter between the hot plate and the inner pot, Only later (usually when cooking is expected), there was a problem in that the electric insulation rice cooker did not operate normally.

The present invention is to solve the problems as described above, when performing the cooking process to set the maximum process time required for the process and each process proceeds beyond the maximum process time is determined to be an abnormal state of the electric rice cooker Its purpose is to provide an abnormal state detection method of the electric thermal rice cooker to alert the user.

To this end, the present invention sets the process maximum time to the process maximum time of the process that takes the most time during the cooking process, and abnormality of the electric insulation rice cooker by determining whether each process proceeds beyond the set process maximum time. And a means for detecting a state and for notifying the user of the detection of the abnormal state.

1 is a block diagram showing a general electric rice cooker

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

Figure 3a and Figure 3b is a flow chart showing the abnormal state detection method of the electric thermal rice cooker of the present invention

Explanation of symbols on the main parts of the drawings

10 microprocessor 12 key input

14 detection unit 16 heater driving unit

18: display portion T1: absorption process

T2: First Heating Process T3: Second Heating Process

T4: Boiling process T5: Moxibustion process

Electric insulation 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 insulation rice cooker having a cooking function and insulation function, and the bottom and body of the electric insulation rice cooker and It is installed on the lid and detects the temperature generated by the various heaters by the sensor 14, the operation of the electric rice cooker by the temperature value detected by the key input and the temperature sensor of the key input unit 12 Microprocessor 10 for controlling the, and is installed on the bottom and the lid and the body of the electric thermal rice cooker and operated by the control of the microprocessor 10 and various heater driving unit 16 for heating the interior of the electric thermal rice cooker, It comprises a display unit 18 for displaying the operating state of the electric rice cooker (including the buzzer), the key display unit 18 for displaying the abnormal state is detected Stage further includes a (LED).

Looking at the cooking process of the electric insulation rice cooker in more detail with reference to the graph showing the cooking process of the general electric insulation rice cooker shown in Figure 2, first, when the operation mode of the electric insulation rice cooker is set to the cooking mode cooking heater and lid heater and body By operating the heater to increase the internal temperature while absorbing the water in the rice inside the inner pot absorption step (T1) is carried out for a predetermined time (about 10 to 11 minutes) to increase the internal temperature to 45 ℃.

After the absorption step (T1) is finished, the first heating step (T2) to determine the cooking amount while raising the interior to a predetermined temperature (75 ℃) to determine the amount of rice in the inner pot, and then the first heating step The second heating process (T3) is performed to distribute the amount of heat based on the cooking quantity determined in to increase the internal temperature to 102 DEG C. Then, the second heating process (T3) is extended to heat the interior to increase the internal temperature. A boiling maintenance step (T4) is performed to heat the inside to rise to the cooking temperature (125 ° C). After each process is completed, the cooking process is finished and the heating process is completed while performing the steaming process T5 of heating the cooked rice to a predetermined temperature (115 ° C.) for a predetermined time (about 12 minutes).

Insulation function is performed to detect the internal temperature with the temperature sensor for cooking to maintain the internal temperature of the electric cooker at a constant temperature (75 ℃), and if the constant temperature (75 ℃) or less, the heater is driven, and the constant temperature (75 ℃) If it exceeds, it repeats a series of processes to stop the heater operation, and keeps the cooked rice at a constant temperature.

3A and 3B, the microprocessor 10 embedded in the electric rice cooker waits for key input from the key input unit 12 when power is supplied. While maintaining, if there is a key input determines whether the input key is the process start key (S3).

If the determination result is not the process start key, another routine is performed (S4). That is, in the case of a key input for setting the cooking mode, a corresponding cooking mode (referring to Jinbap, Korean rice, ordinary rice, grain rice, brown rice, etc.) is set.

When the cooking start key is input while the cooking mode is set and the cooking process starts, the process progress time is measured while the process proceeds, and it is determined whether the measured process progress time exceeds the maximum process time (S5 to S7).

Here, the maximum process time is stored in the memory (ROM) in which the microprocessor 10 is stored together with the program. In the present invention, the most time-consuming process during the cooking process, that is, the first heating process and the second heating process. Set the execution time (approximately 20 minutes) to the maximum process time.

As a result of the determination (S7), when the measured process progress time exceeds the maximum process time, it is judged to be an abnormal state of the electric rice cooker, stops the heater operation, stops the cooking process, operates the buzzer, and abnormally the display unit 18. By operating the status LED, audible and visually inform the user that an abnormal condition has occurred (S8 to S10).

However, as a result of the determination (S7), if the measured process progress time did not exceed the maximum process time, the electric insulation rice cooker was normally operated, and if the process was completed by detecting the internal temperature and confirming that the control temperature of the corresponding process was reached. Determine (S11).

As a result of the determination, if the process is not completed, an abnormal state in which the process progress time exceeds the process maximum time occurs, or the steps S5 to S7 are repeated until the process is completed.

If it is determined that the process progress is completed in step S11 without occurrence of an abnormal state (S12), a flag indicating completion of the process is set (S12), and it is determined whether all the processes are completed by checking whether or not the moxibustion process flag is set (S13). ).

If all processes are finished, the cooking process is normally completed, otherwise, the process flags are sequentially checked to start the next process, and the next process of the completed process is started.

That is, it is determined whether the first heating process flag is set, and if it is not set, the first heating process is started (S14) (S15). However, if the first heating process flag is set, it is determined whether the second heating process flag is set. If not, the second heating process is started (S16) (S17). If not, start the boiling maintenance process (S18) (S19), and if the boiling maintenance process flag is set, start the moxibustion process (S20), measure the time that the process has progressed while the process is in progress, and if this exceeds the maximum process time. The judging steps S5 to S7 are repeated for each step.

As described above, the method for detecting an abnormal state of the electric thermal cooker according to the present invention sets a maximum process time in performing the cooking process, and when each process proceeds beyond the maximum process time, this is an abnormal state of the electric thermal cooker. After stopping the heater operation by judging, stopping the cooking process, and using the buzzer to sound audibly and at the same time visually indicating the abnormal state on the display to inform the user that the electric rice cooker does not operate normally, abnormal state Users can quickly cope with the occurrence.

The present invention has been described with reference to only one embodiment of the abnormal state detection method of the electric thermal rice cooker as described in the claims, the present invention is not limited to this and those skilled in the art will be able to various applications and modifications. .

Claims (3)

In determining the key input from the key input unit 12 and setting the corresponding cooking mode and performing the cooking process in the set cooking mode to control the operation of the electric rice cooker, when the cooking process starts the process progress time while proceeding the process And detecting an abnormal state of the electric thermal cooker by determining whether the measured process progress time exceeds the maximum process time. According to claim 1, The maximum time of the process of determining whether the abnormal state of the electric rice cooker is the abnormal state detection of the electric rice cooker, characterized in that the setting time of the process that takes the most time during the cooking process Way. According to claim 1, If the abnormal state of the electric rice cooker is detected, the heater operation is stopped to stop the cooking process, and then the buzzer is operated while the abnormal state LED on the display unit 18 to alert the abnormal state. Abnormal state detection method of electric heat cooker.