JPH0759227B2 - Electric rice cooker - Google Patents

Description

TECHNICAL FIELD The present invention relates to an electric rice cooker used in general households.

2. Description of the Related Art In recent years, many electric rice cookers using a control system using a microcomputer (hereinafter referred to as a microcomputer) have been on the market. Many of these electric rice cookers have a built-in means for backing up the memory of the microcomputer in the event of a power failure.

Problems to be Solved by the Invention There are two backup methods for the conventional electric rice cooker. On the other hand, the complete backup method restarts from the operation at the time of the power failure when a power failure occurs during rice cooking and the power is restored. On the other hand, the other is a simple backup method, which means that if a power failure occurs during rice cooking, the rice cooking operation is restarted by returning to the beginning. In the former method, if the power outage time was too long depending on which part of the rice was being cooked, the heating power would be too weak and the rice would not cook well even after restarting. Also, in the latter method, there was a problem that even if almost all the rice was cooked, it started from the beginning again and took too much time.

An object of the present invention is to provide an electric rice cooker that solves the above-mentioned conventional problems.

Means for Solving the Problems In order to solve the above-mentioned conventional inconveniences, the present invention provides a power failure detection means for detecting whether AC power is applied, and a predetermined predetermined value when this power failure detection means detects a power failure. If the power failure is detected by the power failure detection means during the rice cooking operation and the power is restored after the power failure is detected, if the time measured by the time measuring means is within the predetermined time, the original rice cooked From the time of the power failure during operation, or from the point of returning to the pre-determined predetermined rice cooking process before the time of the original power failure during rice cooking if the predetermined time or more has elapsed, A power failure recovery means for cooking rice is provided.

Action With this configuration, re-cooking can be started from the optimum part when power is restored according to the length of power failure.

Example Hereinafter, an electric rice cooker according to an example of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a block diagram of the electric rice cooker of this embodiment. 1
Starts cooking rice with the rice cooking switch. When the rice cooking switch 1 is pressed by the rice cooking means 2, the rice cooking operation 2 is performed according to a predetermined rice cooking process such as precooking, cooking, and mashing. 3 is a power failure detecting means for detecting whether or not an AC power source is applied. Reference numeral 4 denotes a time measuring means, which starts time measurement when a power failure is detected by the power failure detecting means 3 and outputs time data up to a place where power is restored.
Reference numeral 5 is a power failure recovery means, and when the power failure detection means 3 detects a power failure, the rice cooking operation by the rice cooking means 2 is stopped and at which part of the rice cooking operation is stopped is input. Then, when the power is restored, the output of the time counting means 4 is input, and when the time data measured is less than or equal to a predetermined time value, the rice cooking means 2 is caused to continue the rice cooking operation at the time of the power failure. On the other hand, when the time value is larger than the predetermined time value, the rice cooking means 2 is restarted to return to a predetermined rice cooking process which is determined in advance according to the time of power failure. Depending on the rice cooking process at the time of power failure, there is a case where it is not necessary to return it to the previous one.

Next, a specific operation example will be described with reference to FIG. 2 (time chart example of cooked rice temperature). Take pre-cooking during the rice cooking process as an example. The part indicated by T ₁ is precooked, and it is said that in this process, allowing water to soak into the rice at a constant temperature leads to delicious cooking. It is necessary to raise the temperature of T _{11 out} of T _{1 to} a certain temperature in the shortest time with strong heat. On the other hand, it is necessary to maintain a constant temperature at T ₁₂ with weak heat. When power is restored when the long power failure occurred between the T _11, but may be restarted from a portion of the T _11, since the long power failure occurs when the rice was temperature between T ₁₂ is too lowered If the power is restored and the process is performed again from the T ₁₂ part, the heating power may be too weak and the cooking may be poor, and it is necessary to restart from the previous process, that is, the T ₁₁ part as in the present embodiment. That is why.

Effects of the Invention As described above, according to the present invention, re-cooking of rice when power is restored according to the length of power failure can be performed from the optimum part according to the process in which the power failure occurs, which is very difficult in practical use. A useful electric rice cooker can be provided.

[Brief description of drawings]

FIG. 1 is a block diagram of an electric rice cooker according to an embodiment of the present invention,
FIG. 2 is a time chart of the temperature of cooked food during the rice cooking operation. 1 ... rice cooking switch, 2 ... rice cooking means, 3 ... power failure detection means, 4 ... time measuring means, 5 ... power failure recovery means.

Claims (1)

[Claims] 1. A rice-cooking switch for cooking rice, a rice-cooking means for performing a rice-cooking operation according to a predetermined rice-cooking process such as pre-cooking, rice-cooking, and spotting when the rice-cooking switch is pressed, and an AC power supply A power failure detecting means for detecting whether there is a power failure, a time measuring means for measuring a predetermined time when the power failure detecting means detects a power failure, and a rice cooking operation when the rice cooking switch is pressed. After the power failure is detected by the power failure detection means, the power is restored, and when this is detected, if the time measured by the time measuring means is within a predetermined time set in advance, a power failure occurs during the original rice cooking operation. If the cooked rice is regenerated and cooked from the time point, and if more than the predetermined time has passed, the time before the power failure during the original rice cooking operation occurs in advance. Electric cooker that includes a power failure recovery means for re-cooking from there back to a predetermined cooking process was fit.