JPH0762B2 - rice cooker - Google Patents

Description

TECHNICAL FIELD The present invention relates to a rice cooker to which a precooking step is added.

2. Description of the Related Art In recent years, rice cookers equipped with a pre-cooking process have become mainstream in order to cook delicious rice.

Conventionally, this kind of rice cooker does not make the rice well unless the rice is soaked in water for a certain period of time as a preparatory step when rice is cooked, and the rice does not absorb water sufficiently, so the temperature is kept constant as the first step of rice cooking. As a "pre-cooking process", in which rice is soaked in water and kept at that temperature, a certain period of time has been set since the start of rice cooking.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention In such a conventional rice cooker, the rice cooked in order to keep the cooked food at a constant temperature in the “pre-cooking process” for a certain time from the start of rice cooking regardless of the amount of rice to be cooked. Depending on the amount of rice, the time required to reach the precooking temperature changes, and the time to keep the rice cooked at a certain temperature also changes accordingly, so the amount of water absorbed by the rice will change, and the rice cooked There was a problem that it did not become.

The present invention solves the above problem, and a first object of the present invention is to obtain a rice cooker that can always cook the same cooked rice regardless of the amount of cooked rice.

A second object is to obtain a rice cooker that can cook rice having a hardness suitable for the user regardless of the amount of cooked rice.

Further, a third object is to obtain a rice cooker that can easily cook rice having several hardnesses suitable for a plurality of users regardless of the amount of cooked rice.

Means for Solving the Problems In order to achieve the above-mentioned object, the present invention provides, as a first means for solving the problem, a pot for putting cooked rice, a heating unit for heating the pot, and a temperature detection for detecting the temperature of the pot. Means, starting means for outputting the start of rice cooking, timer means for starting counting by the output of the starting means and ending counting when the temperature of the pan detected by the temperature detecting means reaches a constant temperature,
During the pre-cooking process during rice cooking, storage means for storing the pre-cooking temperature during rice cooking, correction means for correcting the pre-cooking temperature stored in this storage means based on the time counted by the timer means. And a control means for controlling the heating means so that the temperature of the pot becomes the precooking temperature corrected by the correction means.

Further, as a second means for solving the problem, a setting means for changing the precooking temperature stored in the storage means is provided.

Further, as a third means for solving the problem, storage means for storing a plurality of precooking temperatures, setting means for changing the precooking temperature stored in the storage means, and a plurality of storage means stored in the storage means. And a selecting means for selecting an arbitrary temperature from the precooking temperature, wherein the correcting means corrects the precooking temperature selected by the selecting means based on the time counted by the timer means. .

Action With the above-described configuration, the action of the first problem-solving means is that before the "pre-cooking step" in which the time for the cooked food to reach a certain temperature is counted by the timer means and the correction means is stored in the storage means. Since the cooking temperature is corrected, the amount of water absorbed by rice can be made constant regardless of the time required for the cooked food to reach a certain temperature.

In addition, the function of the second problem solving means is that the setting means allows the precooking temperature stored in the storage means to be arbitrarily changed, so that the rice can be cooked regardless of the time until the cooked food reaches a certain temperature. The water absorption of can be changed arbitrarily.

Further, the function of the third problem solving means is that the pre-cooking temperature set up to now by the setting means is stored in a plurality of storage means, so that the pre-cooking temperature stored by the selecting means is arbitrarily selected, Since the selected precooking temperature is corrected by the correction means, the amount of water absorbed in the rice can be arbitrarily changed regardless of the time until the cooked food reaches a certain temperature.

Examples Examples of the present invention will be described below with reference to the accompanying drawings.

FIG. 1, FIG. 2 and FIG. 3 show an embodiment relating to the first problem solving means of the present invention. As shown in the figure, heating means 2 for heating the pan 1, temperature detecting means 3 for detecting the temperature of the pan 1, starting means 4 for outputting the start of rice cooking, and counting by the output of the starting means 4 In the storage means 6, a timer means 5 for ending the counting when the temperature of the pan 1 detected by the temperature detection means 3 reaches a constant temperature, a storage means 6 for storing the pre-cooking temperature at the time of cooking rice, Correction means 7 for correcting the stored pre-cooking temperature based on the time counted by the timer means 5, and pre-cooking in which the temperature of the pot 1 is corrected by the correction means 7 during the pre-cooking step during rice cooking. It is composed of a control means 8 for controlling the heating means 2 so that the temperature becomes a temperature.

FIG. 2 shows a circuit diagram, which is composed of a microcomputer 10 having the timer means 5, storage means 6, correction means 7 and control means 8 and peripheral circuits. The thermistor 11 for detecting the temperature of the pot 1 is connected to the input port of the microcomputer 10 via the A / D converter 12. As a result, the temperature signal from the thermistor 11 is converted into a binary code and read by the microcomputer 10.
Reference numeral 13 denotes a rice cooking switch, and the microcomputer 10 determines whether or not the rice cooking switch has been pressed to start rice cooking. Further, the heater 14 for heating the pot 1 is connected to an AC power supply 16 in series with a relay 15 for controlling energization of the heater 14, and a transistor 17 is supplied by an output signal of the microcomputer 10.
The heater 15 is turned on / off by opening / closing the relay 15 by passing a current through the relay coil 18 via the. Reference numeral 19 is a DC power supply for operating the above-mentioned circuit.

FIG. 3 shows a flow chart. First, in step 21, key input is performed, and in step 22, rice cooker switch 13
It is determined whether or not is pressed, and when the rice cooking switch 13 is pressed, the process proceeds to step 23. In this step 23 pre-cooking time
The counting of the time T2 counted by T1 and the timer means 5 is started, then the temperature t of the pan 1 is input by the thermistor 11 in step 24, and the energization of the heater 14 is started in step 25. In step 26, it is judged whether or not the temperature t of the pot 1 exceeds a certain temperature tb lower than the precooking temperature ta stored in the storage means 6, and if not, step 24
Return to. On the contrary, if it exceeds, the counting of the time T2 counted by the timer means 5 is finished in step 27, and step 28
Then, based on the time T2 counted by the timer means 5, the pre-cooking temperature ta stored in the storage means 6 is corrected to the temperature α. In step 29, the temperature t of the pan 1 is input again by the thermistor 11, and in step 30, the temperature t of the pan 1 is changed to step 28.
Judge whether or not the pre-cooking temperature α corrected by is reached,
If not exceeded, the heater 14 is energized in step 31, and if exceeded, the heater 14 is stopped in step 32. Next, in step 33, the end of the precooking time is judged, and if the precooking time T1 counted in step 23 has not reached the precooking end time stored in the computer 6, step 29
Return to and repeat step 29 to step 33. If the pre-cooking end time has been reached in step 33, the process proceeds to the cooking process in step 34 to cook rice.

With the above configuration, the timer means 5 counts the time T2 until the pot 1 reaches a certain temperature, and the correction means 7 stores the pre-cooking temperature ta stored in the storage means 6 by the time T2.
As the amount of cooked rice changes and the time T2 fluctuates, and the time to keep the cooked rice at the precooking temperature ta fluctuates by that amount, the precooking temperature is adjusted by that fluctuation time. By correcting the value of ta to α, the amount of water absorbed by rice can be made constant, and the rice can be cooked at a certain level at any time.

FIG. 4, FIG. 5 and FIG. 6 show an embodiment relating to the second means for solving the problems of the present invention. In each figure, the same components as those of the first problem solving means are designated by the same reference numerals and the description thereof is omitted.

As shown in the figure, in addition to the constituent elements of FIG. 1 described above, setting means for changing the precooking temperature stored in the storage means 6.
It consists of 41 and.

FIG. 5 shows a circuit diagram. By pressing the setting switch 41 for changing the precooking temperature, the microcomputer 10
It is configured such that the precooking temperature stored in the storage means 6 built in the can be changed.

FIG. 6 shows a flow chart. In step 51, key input is performed, and in step 52, it is determined whether the key pressed is the rice cooking switch 13. If it is not the rice cooking switch 13, the setting switch 41 is set in step 53. It is judged whether or not it has been pressed, and if not, the process returns to step 51. Repeat steps 51 to 56 until the rice cooking switch 13 is pressed. If the setting switch 41 is pressed in step 53, the process proceeds to step 54 and the microcomputer
The pre-cooking temperature ta stored in the storage means 6 in 10 is increased by one rank. Next, in step 55, it is judged whether or not the pre-cooking temperature ta exceeds a specified temperature (for example, 80 ° C),
If it exceeds, the previous cooking temperature ta is initialized (for example, 50 ° C.) in step 56, and the process returns to step 51. If it has not exceeded it, the process directly returns to step 51. If the rice cooking switch 13 has been pressed in step 52, proceed to step 23,
After that, the same operation as the flowchart of FIG. 3 is performed.

Thus, according to the rice cooker of the embodiment of the second problem solving means, the pre-cooking temperature ta stored in the storage means 6 is arbitrarily changed by the setting switch 41, and the pre-cooking temperature ta is set to the time T2.
As the "pre-cooking process" is performed after adjusting to α, the amount of water absorbed in the rice can be made constant regardless of the amount of cooked rice, and the cooked rice can be cooked to a constant level at any time, unless the pre-cooking temperature ta is changed. If the pre-cooking temperature ta is changed, the water absorption of rice can be changed by the amount of change in the pre-cooking temperature changed by the setting switch 41. You can cook Sano rice.

FIG. 7, FIG. 8 and FIG. 9 show an embodiment relating to the third means for solving the problems of the present invention. In each drawing, the same components as those of the above-mentioned first problem solving means are designated by the same reference numerals, and the description thereof will be omitted.

As shown in the figure, heating means 2 for heating the pan 1, temperature detecting means 3 for detecting the temperature of the pan 1, starting means 4 for outputting the start of rice cooking, and counting by the output of the starting means 4 Then, the timer means 5 that finishes counting when the temperature of the pan 1 detected by the temperature detecting means 3 reaches a constant temperature, the storage means 61 that stores a plurality of precooking temperatures during rice cooking, and the storage means 61. Setting means to change the precooking temperature stored in
62, selection means 63 for selecting an arbitrary temperature from the plurality of precooking temperatures stored in the storage means 61, and the precooking temperature selected by this selecting means based on the time counted by the timer means 5. And a control means 8 for controlling the heating means 2 so that the temperature of the pan 1 becomes the pre-cooking temperature corrected by the correction means 64 during the pre-cooking step during rice cooking. Has been done.

FIG. 8 shows a circuit diagram in which the microcomputer 6 has a built-in storage means 61, and by pressing the setting switch 62 of the pre-cooking temperature setting means, a plurality of pre-cookings stored in the storage means 61 are shown. Among the temperatures, the pre-cooking temperature selected by the selection switch 63 can be changed.

FIG. 9 shows a flow chart. In step 71, key input is performed. In step 72, it is determined whether the key pressed is the rice cooking switch 9. If it is not the rice cooking switch 13, the setting switch 62 is pressed in step 73. If it is not pressed, the selection switch is selected in step 74.
It is determined whether or not 63 is pressed, and if not pressed, the process returns to step 71. Steps 71 to 80 are repeated until the rice cooking switch 13 is pressed. If the setting switch 62 is pressed in step 73, the process proceeds to step 75, and the pre-cooking temperature ta selected by the selection switch 63 among the plurality of pre-cooking temperatures stored in the storage means 61 in the microcomputer 10 is selected. Increase by 1 rank. Next, in step 76, this pre-cooking temperature ta is set to the specified temperature (for example, 80
℃) is exceeded, if it is exceeded, in step 77 this pre-cooking temperature ta is initialized (for example, 50 ℃),
Return to step 71. If it has not exceeded it, the process directly returns to step 71. If the selection switch 63 has been pressed in step 74, proceed to step 78 and select counter number n
Increase by 1 rank. Next, at step 79, it is judged whether or not the number n of this counter exceeds a prescribed number (for example, 5), and if it exceeds, the number n of this counter is initialized at step 80 and the process returns to step 71. If not exceeded, the process directly returns to step 71. If the rice cooking switch 9 has been pressed in step 72, the process proceeds to step 23, and after that the sixth
The same operation as the flowchart in the figure is performed.

As described above, according to the rice cooker of the embodiment of the third problem solving means, the pre-cooking temperature ta stored in the storage means 61 is arbitrarily changed by the setting switch 62, and the setting switch until now is changed.
The plurality of pre-cooking temperatures ta changed by 62 are stored in the storage means 61, and the desired pre-cooking temperature ta can be easily selected from the plurality of pre-cooking temperatures stored in the storage means 61 by the selection means 63. The pre-cooking temperature ta is corrected to α by time T2 and the "pre-cooking process" is performed, so if the pre-cooking temperature ta is not changed by the setting switch 62 or the selection switch 63, the amount of water absorbed by rice regardless of the amount of rice cooked. The rice can be cooked at a fixed rate at any time, and when the pre-cooking temperature ta is changed with the setting switch 62 or the selection switch 63, the amount of water absorbed into the rice by the changed amount of the pre-cooking temperature. By memorizing the precooking temperature of some people's tastes, it is possible to always cook rice of several kinds of hardness that suits the taste of each person, regardless of the amount of rice cooked. .

EFFECTS OF THE INVENTION As is clear from the above description of the embodiments, according to the present invention, the time until the temperature of the cooked food reaches a certain temperature is counted by the timer means, and the correction means is stored in the storage means according to the time. Since the "pre-cooking process" is performed by correcting the pre-cooking temperature, even if the amount of cooked rice changes or the time it takes for the cooked food to reach a certain temperature, such as when cooking with warm water instead of water, the The amount of water absorbed by rice can be made constant regardless of time fluctuations, and a constant amount of cooked rice can be cooked without changing the time of water absorbed by rice.

Also, the time until the cooked food reaches a certain temperature is counted by the timer means, the precooking temperature stored in the storage means is arbitrarily changed by the setting means, and the precooking temperature is counted by the timer means. Correct the "pre-cooking process"
Therefore, if you do not change the precooking temperature, you can make the amount of water absorbed by rice constant regardless of the amount of rice cooked and the temperature of the first water, and you can always cook a fixed amount of cooked rice. If you change the value, you can change the amount of water absorbed into the rice by the amount of change in the precooking temperature that was changed by the setting means, so regardless of the amount of rice cooked and the temperature of the initial water, the hardness that suits the taste of the user can be changed. You can get a rice cooker that can cook rice.

In addition, the operability is good, and since the pre-cooking temperature once set is kept in memory, it is possible to obtain a convenient rice cooker that can reproduce the cooked rice of the same hardness without operating the setting means one by one.

Furthermore, the pre-cooking temperature stored in the storage means is arbitrarily changed by the setting means, and the plurality of pre-cooking temperatures changed by the setting means are stored in the storage means, and are stored in the storage means by the selecting means. You can easily select your favorite pre-cooking temperature from the multiple pre-cooking temperatures and perform the "pre-cooking process" by correcting the selected pre-cooking temperature with the time counted by the timer means. If you do not change the precooking temperature, you can make the amount of water absorbed into the rice constant regardless of the amount of rice cooked and the initial water temperature, and you can always cook a fixed amount of cooked rice. When the cooking temperature is changed, the amount of water absorbed by the rice can be changed by the amount of change in the previous cooking temperature. It can be obtained cooker capable cooking several different hardness of rice that was the preference of each person regardless of time.

[Brief description of drawings]

FIG. 1 is a block diagram of a rice cooker according to an embodiment of the first problem solving means of the present invention, FIG. 2 is a circuit diagram thereof, FIG. 3 is a flow chart showing the operation of the embodiment, and FIG. A block diagram of a rice cooker of an embodiment according to a second means for solving the present invention, FIG. 5 is a circuit diagram thereof, FIG. 6 is a flow chart showing the operation of the embodiment, and FIG. 7 is a diagram of the present invention. 3 is a block diagram of a rice cooker according to one embodiment of the problem solving means of FIG. 3, FIG. 8 is a circuit diagram of the rice cooker, and FIG. 1 ... pan, 2 ... heating means, 3 ... temperature detection means, 4 ...
... starting means, 5 ... timer means, 6 ... memory means, 7
... correction means, 8 ... control means.

Claims (3)

[Claims] 1. A pot for putting cooked rice, heating means for heating the pot, temperature detecting means for detecting the temperature of the pot, starting means for outputting the start of rice cooking, and counting by the output of the starting means. And a timer means for ending the counting when the temperature of the pan detected by the temperature detecting means reaches a constant temperature, a storage means for storing the precooking temperature at the time of cooking rice, and a storage means for storing this in the storage means. Correction means for correcting the pre-cooking temperature based on the time counted by the timer means, and the temperature of the pan during the pre-cooking step at the time of rice cooking is adjusted to the pre-cooking temperature corrected by the correcting means. A rice cooker provided with a control means for controlling the heating means. 2. The rice cooker according to claim 1, further comprising setting means for changing the precooking temperature stored in the storage means. 3. A storage means for storing a plurality of precooking temperatures, a setting means for changing the precooking temperature stored in the storage means, and a plurality of precooking temperatures stored in the storage means. 2. The rice cooker according to claim 1, further comprising a selection unit that selects an arbitrary temperature, wherein the correction unit corrects the precooking temperature selected by the selection unit based on the time counted by the timer unit. .