JPH074315B2 - microwave - Google Patents

Description

The present invention relates to a microwave oven capable of cooking rice by microwave.

(B) Conventional technology In a microwave oven capable of microwave rice cooking as shown in Japanese Patent Publication No. Sho 60-23257, rice can be cooked deliciously when cooking a certain amount of rice, but the amount of rice is small. I can't cook rice deliciously.

In order to cook delicious rice with a small amount of rice, it is necessary to accelerate the water absorption of the rice. It is effective to raise the water temperature, but if the water absorption temperature rises too much, only the surface of the water will absorb water. However, a bad rice with a core is completed.

(C) Problem to be Solved by the Invention The present invention is intended to provide a microwave oven capable of deliciously cooking rice by microwave even if the amount of rice is small.

(D) Means for Solving the Problems The present invention provides a microwave oven capable of cooking rice by microwave, and a water-absorption period defining means for defining a water-absorption period immediately after the start of rice cooking, and the water-absorption temperature at the beginning of the water-absorption period is increased. First microwave output designating means for designating a first microwave output for reaching a predetermined value, and the first microwave for switching during the water absorption period and for maintaining the water absorption temperature at the predetermined value. Second microwave designating means for designating a second microwave output smaller than the output.

(E) Action When rice is cooked by microwaves by placing a bowl containing approximately 1/2 cup of rice and an appropriate amount of water in a heating chamber where microwaves are supplied, a water absorption period is provided immediately after the start of rice cooking. Water is absorbed. At the beginning of this water absorption, the first microwave output is designated, the water absorption temperature quickly reaches a predetermined value based on the first microwave output, and then the second microwave output smaller than the first microwave output. Is switched and designated, and the water absorption temperature is maintained at the predetermined value based on the second microwave output. As a result, the water absorption of rice is promoted at an appropriate water absorption temperature, and the rice can be cooked deliciously even if the amount of rice is small in the subsequent rice cooking control.

(F) Embodiment FIG. 1 shows an external view of a microwave oven according to an embodiment of the present invention. On the front surface of the microwave oven main body 1, a door 2 for opening and closing a front opening of a built-in heating chamber (not shown), and an operating portion 3 are provided. Is provided. The operation unit 3 has a plurality of menu keys 4, 4, ..., Start key 5 and the like.

FIG. 2 shows the circuit of the microwave oven described above, and is provided with a control unit 6 including a microcomputer for controlling the microwave oven. The control unit drives and controls the magnetron 7 that supplies microwaves for heating food into the heating chamber based on the operation information from the operation unit 3.

Therefore, when cooking rice with a small amount of rice (80 g) of about 1/2 cup, a bowl containing this small amount of rice and an appropriate amount of water (120 cc) is placed in a heating chamber to which microwave is supplied. Then, when the menu key 4 for cooking rice is operated and the start key 5 is operated on the operation unit 3, the control unit 6 causes the third unit incorporated in itself to operate.
Rice cooking control is performed based on the control program shown in the figure, and at this time, the water absorption or the rice cooking temperature changes as shown in FIG.

First, in step S1, the control unit 6 specifies a relatively large first microwave output P1a (= 250 W) and a first water absorption time t1a (= 2 minutes) for the first water absorption step, and then the above first The magnetron 7 is driven and controlled so as to output the one microwave output P1a, and the step S2 waits for the first water absorption time t1a to elapse. At this time, the water absorption temperature rises rapidly and reaches a predetermined value of about 60 ° C. when the first water absorption time t1a elapses.

When the first water absorption time t1a has elapsed, the control unit 6 proceeds to S3 step and outputs the second microwave output for the second water absorption process.
By switching and designating P1b (= 30 W) and the second water absorption time t1b (= 8 minutes), the magnetron 7 is drive-controlled so as to output the second microwave output P1b, and in the S4 step, the second
Wait for the water absorption time t1b to elapse. The second microwave output P1b is smaller than the first microwave output P1a. At this time, the water absorption temperature is maintained at the above predetermined value of about 60 to 65 ° C.

In this way, the water absorption of the rice is promoted at an appropriate water absorption temperature, and in the subsequent rice-cooking control, the base is prepared so that the rice can be cooked deliciously even if the amount of rice is small.

When the second water absorption time t1b has elapsed, the control unit 6 then outputs the microwave output for the heating process in step S5.
By switching and designating P2 (= 500 W) and heating time t2 (= 1 minute 45 seconds), the magnetron 7 is drive-controlled to output the microwave output P2, and the heating time t2 elapses in step S6. Wait for At this time, the cooked rice temperature rises even more quickly, and reaches a temperature of about 98 ° C. for gelatinizing the starch when the heating time t2 elapses. There is no spill when rising.

When the heating time t2 has elapsed, the control unit 6 then proceeds to step S7, where microwave output P3 (=
100W) and cooking time t3 (= 14 minutes) are specified by switching,
The magnetron 7 is driven and controlled in order to output the microwave output P3, and in step S8, the heating output time t3 is awaited. At this time, the rice cooking temperature is maintained at about 98 ° C, and the starch is pregelatinized without spilling.

When the cooking time t3 has elapsed, the control unit 6 then proceeds to S9.
Mileo wave output P4 for the Murashi process at step
(= 80 W) and the stripping time t4 (= 5 minutes) are specified by switching, and the magnetron 7 is drive-controlled to output P4 mainly in the microwave, and in step S10, the stripping time t4.
Wait for. At this time, starch is evenly gelatinized.

When the uneven time t4 has elapsed, the control unit 6 then proceeds to S1.
Microwave output P5 for additional cooking process in 1 step
(= 500 W) and the additional cooking time t5 (= 30 seconds) are specified by switching, and the magnetron 7 is drive-controlled to output the microwave output P5, and the additional cooking time t5 elapses in step S12. wait. At this time, excess water evaporates and the drainage disappears.

The rice cooking is completed by the above.In this rice cooking, a water absorption time is set immediately after starting the rice cooking, and at the beginning of this water absorption period, the water absorption temperature is quickly reached to a predetermined value of about 60 ° C, and then the water absorption temperature is changed to the above predetermined value. By maintaining the water absorption of rice at an appropriate water-absorption temperature as described above, the rice has a great effect even if the amount of rice is small.

Moreover, the time required for water absorption is the first and second water absorption time.
Even if t1a and t1b are combined, it is only 10 minutes, which does not hinder the shortening of cooking time.

Incidentally, the water absorption rates after 10 minutes and 20 minutes of water absorption for each water absorption temperature were experimentally determined, and the results are shown in the following table.

As can be seen from the above table, as in the above examples, the water absorption temperature is about 60 ° C, the water absorption rate in the water absorption step is about 10 minutes, the water absorption temperature is 20 ° C at room temperature, the water absorption time is 20 minutes. It is almost equal to the rate, and it can be seen that a water absorption time of about 10 minutes was saved in the above example.

In FIG. 3 according to the above embodiment, steps S1 to SS4 are the water absorption period defining means of the present invention, step S1 is the first microwave output designating means of the present invention, and step S3 is the second microwave output of the present invention. It is now clear that each of the designated means is addressed.

If you cook rice with 1 cup or 2 cups of rice,
It suffices to operate the menu key 4 for cooking rice twice or three times. In this case, the bowl is too small and a container with a capacity of about 1.5 l is used. Then, with respect to this rice cooking control, each output and time are changed as shown in the following table.

(G) Effect of the Invention According to the present invention, water absorption of rice is promoted under an appropriate water absorption temperature, and delicious rice without core can be cooked even when the amount of rice is small, and the time required for this water absorption Since the cooking time can be shortened, the cooking time can be shortened and a practical microwave oven can be provided.

[Brief description of drawings]

1 is a front view, FIG. 2 is a block circuit diagram, FIG. 3 is a flow chart of a control program, and FIG. 4 is a temperature characteristic diagram during rice cooking. 6 ... Control unit.

Claims (1)

[Claims] 1. In a microwave oven capable of cooking rice by microwaves, a water-absorption period defining means for defining a water-absorption period immediately after starting rice cooking, and a first means for allowing the water-absorption temperature to reach a predetermined value quickly at the beginning of the water-absorption period. First microwave output designating means for designating a microwave output and second microwave output smaller than the first microwave output for maintaining the water absorption temperature at the predetermined value while being switched during the water absorption period. A microwave oven provided with a second microwave designating means for designating.