JPH0795973B2 - rice cooker - Google Patents

Description

TECHNICAL FIELD The present invention relates to a rice cooker.

2. Description of the Related Art In the conventional rice cooker, when rice cooking is started, the rice and water are heated to a constant temperature so that the rice absorbs water. 2 of temperature
The amount of cooked rice is determined by the time it takes to pass between the points, and the required heating power is calculated according to the amount of cooked rice. Then, when the determination of the amount of cooked rice is completed and the calculation result of the heating power is obtained, the heating power is added until the temperature reaches the rice cooking end temperature, and when the temperature reaches the rice cooking end temperature, the rice cooking is ended.

Of the above-mentioned rice cooking processes, the process from the start of rice cooking to the end of water absorption is called the water absorption process, the process of determining the next rice cooking amount is called the rice cooking amount determination process, and the process until the next rice cooking is finished is called the cooking process.

Here, the formula for calculating the heating power in the cooking process was based on the assumption of cooked rice in which rice was sufficiently absorbed with water.

Problems to be Solved by the Invention In such a conventional rice cooker, if the water absorption step is omitted in order to quickly cook rice immediately after washing, the rice becomes hard according to the rice quantity determination formula that assumes water absorption, and as a result, , The rice was easy to finish. Further, there is no means for omitting the water absorption step after the start of rice cooking, and there is a problem that the water absorption step cannot be omitted during rice cooking.

An object of the present invention is to provide a rice cooker that solves such problems.

Means for Solving the Problems In order to solve the above problems, the rice cooker of the present invention includes a first storage means that stores a rice cooking amount determination formula of water that has been preliminarily absorbed, and water absorption without absorbing water. The second storage means for storing the rice cooking amount judgment formula when the process is omitted and the judgment formula of the first storage device for normal rice cooking are selected, and the second storage device for the second storage means is selected when the water absorption process is omitted. It is provided with a control means for selecting a judgment formula and controlling so as to cook rice, and a precooking cutting means capable of omitting the water absorption step not only before starting the rice cooking but also in the water absorption step.

Action According to the above configuration, when the water absorption process is omitted and the water absorption process is omitted, the determination formula of the second storage means is used. Also in the above, the water absorption step can be omitted.

Embodiment One embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a block diagram of a rice cooker according to an embodiment of the present invention. In FIG. 1, 1 is a starting means for starting rice cooking, 2 is a pre-cooking cutting means for omitting the water absorption step of rice cooking, 3 is a heating means for heating and cooking, 4
Is a temperature detecting means for detecting the temperature of rice at the time of cooking rice, 5 is a timer means for measuring the time taken for the temperature of rice to pass between two predetermined points by the temperature detecting means 4, and 6 is the amount of rice cooked by the timer means 5. The first storage means 7 stores therein a judgment formula used when judging, and the second memory 7 stores therein a rice cooking amount judgment formula used when the water absorption step is omitted by the precooking cutting means 2. In the case of normal rice cooking, means 8 selects the judgment formula of the first storage means 6, and when the water absorption step is omitted, selects the judgment formula of the second storage means 7 to cook the rice. It is a control means for controlling.

FIG. 2 shows a concrete circuit diagram of the rice cooker in one embodiment of the present invention. In FIG. 2, 10 is a start switch for starting rice cooking, 11 is pre-cooking without the water absorption step of rice cooking. Cut switch, 12 is a heater for heating food, 13 is a relay for energizing the heater 12, 14 is a relay drive unit for driving the relay 13,
15 is a thermistor for detecting the temperature of rice, 16 is an A / D converter for A / D converting the signal of the thermistor 15, 17 is the start switch 10, the pre-cooking cut switch 11 and the A / D
An input unit for inputting the signal of the converter 16, 18 is an output unit for opening and closing the contact 13a of the relay 13 to energize the heater 12, and 19 is the output unit 18 according to the signal input from the input unit 17. A control unit 20 for controlling the control unit 20 is a microcomputer including the input unit 17, the output unit 18, and the control unit 19.

FIG. 3 shows a main part of a flow chart of the microcomputer 20, and the operation will be described based on this flow chart.

First, in step 22, a switch input by the input unit 17 is accepted. Next, in step 23, it is determined whether or not the start switch 10 has been pressed. If not, the process proceeds to step 24. In this step 24, it is judged whether or not the precooking cut switch 11 has been pressed, and if it has not been pressed, the process returns to step 22, and step 22
Repeat steps from to 24. If the precooking cut switch 11 is pressed in step 24, the process proceeds to step 25, and the precooking cut flag is turned on.

If the start switch 10 is pressed in step 23, the process proceeds to step 26, and if the precooking cut flag is not turned on, the process proceeds to step 27 to cause the rice to absorb water. Next step
Proceeding to 28, it is determined whether or not the precooking cut switch 11 has been pressed. If it has been pressed, the process proceeds to step 31, while if it has not been pressed, the process proceeds to step 29. Then, in step 29, it is determined whether or not the water absorption process is completed, and steps 27 to 29 are repeated until the water absorption process is completed. And if the water absorption process is completed in step 29,
Proceeding to step 30, the cooked rice amount judgment formula is retrieved from the first storage means 6.

Next, if the precooking cut switch 11 is pressed in step 26, the process proceeds to step 31 and the rice cooking amount determination formula is taken out from the second storage means 7. The second storage means 7 stores a cooked rice amount determination formula that slightly increases the heating power to compensate for the lack of water absorption due to the omission of the water absorption step. After that, the process proceeds to step 32 to move to the next step, where rice is cooked.

Effects of the Invention According to the present invention, as is clear from the description of the above embodiments,
If there is a water absorption process in the rice cooking process, the rice cooking amount is judged in the rice cooking amount judging process, and based on this judgment result, the rice cooking amount judgment formula of the first storage means is used to determine the optimum necessary for the next cooking process. On the other hand, if you cook rice immediately after washing the rice without washing the water, the water absorption is insufficient,
Since a heating power different from the heating power calculated in the rice cooking amount determination process is required in the cooking process, a second rice cooking amount determination formula is provided, and the optimum heating power is determined using this second rice cooking amount determination formula. Since it can be set in the cooking process, it is possible to cook the delicious rice by compensating for the lack of water absorption in the cooking process. In addition, the water absorption step can be omitted not only before the start of rice cooking but also in the water absorption step, and the usability can be improved.

[Brief description of drawings]

FIG. 1 is a block diagram of a rice cooker showing an embodiment of the present invention,
FIG. 2 is a specific circuit diagram of the rice cooker, and FIG. 3 is a flowchart of a microcomputer in the rice cooker. 1 ... Starting means, 2 ... Pre-cooking cutting means, 3 ... Heating means, 4 ... Temperature detecting means, 5 ... Timer means, 6 ...
First storage means, 7 ... Second storage means, 8 ... Control means.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Makoto Katagasu 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) References JP 61-37124 (JP, A) JP 63- 117717 (JP, A)

Claims (1)

[Claims] 1. A starting means for starting rice cooking, a pre-cooking cutting means for omitting the water absorbing step of the rice cooking step before starting the rice cooking and during the water absorbing step, a heating means for performing the rice cooking, and a rice for cooking rice. Temperature detecting means for detecting the temperature, timer means for measuring the time taken for the temperature of rice to pass between two predetermined points by the temperature detecting means, and in the case of normal rice cooking, calculation is performed based on the time measured by the timer means. A first storage unit for storing a rice cooking amount determination formula for storing the rice cooking amount determination formula for storing the rice cooking amount determination formula used when the water absorption step is omitted by the pre-cooking cutting unit; A rice cooker comprising: a control unit that selects the rice cooking amount determination formula in the first storage unit or the second storage unit and controls to cook rice according to whether or not the pre-cooking cutting unit is used.