JPH07106179B2 - rice cooker - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rice cooker equipped with a rice cooking heater for heating a pan and controlling the input of the rice cooking heater to cook rice.

[0002]

2. Description of the Related Art In recent years, in this type of rice cooker, it is possible to select the rice cooking menu for various courses such as white rice, brown rice, cooked rice and porridge by controlling the input of the rice cooking heater with an electronic circuit. It has become to. A general structure of such a rice cooker is shown in FIG. 9, where 1 is a bowl main body, and this bowl main body 1 is composed of an outer case 2 and an inner case 3, and a rice cooker heater 4 and a temperature are provided on the bottom of the inner case 3. A sensor 5 is provided, and an electronic circuit unit 6 that controls the input of the rice cooking heater 4 based on the temperature detection information from the temperature sensor 5 is provided at the bottom of the outer case 2. The pot 7 is removably housed in the inner case 3, and the opening at the upper end of the pot 7 is closed by a lid 8.

For example, when cooking white rice, the pan 7 is taken out from the inner case 3, and a required amount of washed white rice and a predetermined amount of water according to the amount of the white rice are stored in the pan 7. After that, the pot 7 is inserted into the inner case 3, the opening is closed by the lid 8, and in this state, a start switch (not shown) is turned on manually or by a timer. In response to this, the input to the rice cooking heater 4 is the electronic circuit unit 6
Is controlled via a have any rice raised cooked through cooking process illustrated in Figure 10.

The rice cooking process shown in FIG. 10 represents the relationship between the temperature change of the pot with the passage of time and the input state of the rice cooking heater. First, hot water is cooked in response to the start switch being turned on. In the process of this hot water cooking,
It is controlled to 70% (eg 700W) input to the rice cooking heater, and then 5'off with 100% (1000W) input.
-40 "on-5'20" off is controlled, and the water in the pan is heated to an appropriate temperature by such control, and the water permeates into the rice grains sufficiently. In addition, "" represents a second of time, and "represents a minute.

After such hot water is cooked,
After shifting to a substantial rice cooking process, the rice cooking heater is first energized with 100% input. Due to this energization, the temperature of the pan gradually rises, and the amount of rice in the pan is detected in the middle of that, that is, while the temperature of the pan rises from 70 ° C to 80 ° C. This rice amount detection is calculated from the time T required for the temperature of the pot to rise from 70 ° C to 80 ° C. That is, when the amount of rice is small, the time T
Is short and the amount of rice is large, the time T becomes longer,
For example, when T <55 ″, a small amount is determined, and when T ≧ 55 ″, a large amount is determined.

Further, when the pot reaches 94 ° C., boiling detection is started. This boiling detection is performed by utilizing the fact that when the water in the pot starts to boil, the temperature rise of the pot is suppressed by the latent heat of vaporization. In other words, when the amount of rice is small from the time the pot reaches 94 ° C, after 60 ″, when it is also large,
When the temperature rise of the pot falls below 5deg after 2'20 ", the water in the pot is judged to have boiled based on this detection.

After such boiling detection is performed,
50% (500W) input is controlled for the rice cooker,
As a result, the boiling of water in the pot will continue stably.

[0008] By continuing such boiling, the water content in the pan decreases, and when the temperature rise of the pan starts again, the control is switched to 30% (300 W) input to the rice cooking heater. Cooking is completed when the temperature of the pot rises and reaches 120 ° C. And Thereafter pan is kept substantially the same temperature as during the boiling of water, Murasa internal your rice, is kept through the insulation heater 9 and 10, further shown in FIG. 9 after this unevenness.

[0009]

Although the white rice is cooked by such a heating pattern, the rice cooked with white rice is selected on a daily basis more frequently than the rice cooked menus such as brown rice, cooked rice and porridge. despite that, its in the heating pattern is always constant, and for this reason it is only possible to obtain your food of a certain cook up state.

[0010] from a point on the taste, soft eyes, because the hard eyes, or there is a case such as prefer your rice that with a burnt, as described above in the prior art can not be rice only at a constant heating pattern, this demand It was difficult to respond. In the case of obtaining your meal of by force softer and hard eyes, if adjusting the amount of water added to the pot, but it is possible to respond to a certain extent their expectations, however With such a means, in rice or caused to boil over is, there is a problem that remains is the core of your rice, which went up cook.

To solve this problem, Japanese Patent Laid-Open No. 62-13
No. 8152 discloses that in addition to the normal ordinary cooking mode,
Equipped with a cooking mode, the mode switch corresponding to the selection switch
If you select the cooking mode better with the replacement switch,
The temperature of the rice is easy to absorb water before it reaches boiling.
By gradually reducing the power supplied to the heater,
Cook soft rice with the same amount of water as the cooking mode.
A rice cooker capable of performing is disclosed.

However, this Japanese Patent Laid-Open No. 62-138152
The rice cooker in the gazette is operated by a burn switch.
Switching the burning of cooked rice in three stages
Although the rice can be cooked, the hardness of the rice is
You can only cook rice in two ways. Well
Also, the amount of heating until boiling after the start of rice cooking can be changed.
Depending on the type, cook the rice normally or softly
In this case, the inundation time of rice before starting rice cooking
If it is different, rice may not be cooked in the desired state
There is In addition, slow down the speed of boiling
Then, only the surface of the rice becomes excessively alpha, which is so-called
It becomes delicious rice with moderate stickiness.
I can't get food. Also, during rice cooking operation and heat retention operation
When the mode changeover switch is operated, rice is cooked.
The heating pattern corresponding to the menu changes on the way,
You can no longer get delicious rice, or start cooking rice.
Sometimes it is necessary to operate the switch again.
Just in case.

Therefore, in view of the above problems, the present invention has the same structure.
You can cook white rice with three levels of hardness by adding water.
At the same time, delicious rice with moderate stickiness is obtained and cooked.
Cooking pattern does not change in the middle of rice
Rice cooker that does not need to operate the selection switch every time
The purpose is to provide.

[0014]

The present invention is directed to a container and a container
Heating means for heating the container and detecting the temperature of the container
Depending on the temperature detecting means and the temperature of the container,
Control means to control the input to
Standard by changing the heating amount until
In addition to the white rice cooked heating pattern, the water content is higher than the standard.
White rice cooked rice heating pattern to cook rice and than standard
Rice rice heating putter that cooks rice with low water content
And a heating control selection means for selecting
Output a signal to select each of the above rice cooked rice heating patterns
Equipped with a selection switch, which is used during the rice cooking process and the heat retention process.
Even if there is a changeover operation of the selection switch on the
Is disabled and the white rice cooker is read and held at the beginning of rice cooker.
Which was configured to perform cooking while heat pattern
is there.

[0015]

[Function] With the above configuration, a standard rice cooked rice heating pattern
Besides, white rice cooked in rice with a higher water content than the standard
For cooking rice heating pattern and rice with less water content than standard
By heating and adjusting the rice rice heating pattern to cook
By selecting the same amount of water, hard, standard, soft
You can cook white rice with three levels of hardness
It Also, the selection switch is hard, standard, or soft
Depending on the selection operation, the rice will be cooked accordingly.
Select the heating pattern from the start of boiling
The rice is cooked according to this heating pattern.
Therefore, use hard or soft rice with an appropriate stickiness.
You can cook it deliciously in this state. In addition, cook
During the rice process and the heat retention process, the changeover operation of the selection switch
Even if there is, the signal reading is invalidated.
You can get your favorite rice without changing the heat pattern.
To be Moreover, the heating pattern is manipulated once with the selection switch.
Once created, the selected course will be read and retained.
Therefore, it is necessary to operate the selection switch each time when cooking rice.
Absent.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings.

In FIG. 1 to FIG. 4, 11 is a bowl body, and this bowl body 11 is composed of an outer case 12 and an inner case 13, and a rice cooking heater 14 as a heating means and a temperature sensor 15 at the bottom of the inner case 13. The temperature sensor is provided on the bottom of the outer case 12.
An electronic circuit unit 16 that controls the input of the rice cooking heater 14 based on the temperature detection information and the like by the 15 is provided. A pan 17 is removably housed in the inner case 13, and an upper end opening of the pan 17 is closed by a lid 18. 19 and 20 are heat retention heaters. Reference numeral 21 denotes an operation panel provided on the lid 18, and the operation panel 21 is provided so as to partially form a conical surface 22 formed on the peripheral side surface of the lid 18 and having an inclination angle α of 40 °. . In addition, various display units 23 for displaying the current time, timer setting status, rice cooking menu, etc. on the operation panel 21, and various operations for time adjustment, reservation setting, rice cooking menu selection, cancellation thereof, and start. A switch 24 is provided, and a selection switch 25, which is a switch for selecting the cooked state as standard, strong (hard), or weak (soft) when cooking rice, is provided. As shown in FIG. 4, the selection switch 25 has a concavo-convex portion 26 formed by knurling on the upper surface and a tapered surface on the side surface.
27 is formed and is provided so as to slightly project from the conical surface 22, and an operation of pressing the concavo-convex portion 26 with a finger to rotate it and a tapered surface
You can pick 27 with your finger and rotate it.

FIG. 5 is a block diagram showing the electrical configuration.
A, which constitutes the temperature detecting means 29 together with the temperature sensor 15,
The D converter outputs a signal according to the detected temperature. 30
Is a control means composed of a microcomputer constituting the electronic circuit unit 16, which is well known to the CPU 3
1, timer circuit 32, memory 33, input circuit 34, output circuit 35
And the like, and the CPU 31 selects a plurality of rice cooking menus to determine a rice cooking course, and a heating operation which is activated when at least a white rice course is selected by the rice cooking selection means and which is different in a cooked state after boiling. It has a fire addition / decrease selecting means as a changing means for selecting a pattern. The control means 30 has a plurality of types of programs, and performs drive control of the rice cooking heater 14 in accordance with the rice cooking course selected according to the program held by the program, and at least the standard, strong, and weak courses in white rice cooking. . Also, the CPU
31 is a selection switch to select the heating pattern of white rice cooking
The signal of 25, the signal of the operation switch 24, and the signal of the detected temperature of the pan 17 are input via the input circuit 34, respectively. 36
Is a drive circuit for the heaters 14, 19 and 20, which is the CPU 31
The heaters 14, 19 and 20 are driven and controlled based on the control signal output from the output circuit 35. Reference numeral 37 denotes a drive circuit, which is a display unit 23 including an LCD based on a control signal output from the CPU 31 via the output circuit 35.
Drive control.

When the selection switch 25 is operated to cook the white rice in the standard course, the rice is cooked according to the heating pattern shown in FIG. Similarly, in the case of the strong course, the heating pattern shown in FIG. 6 is used, and in the case of the weak course, the heating pattern shown in FIG. 7 is used.

The heating pattern of the strong course (FIG. 6) is the same as the heating pattern of the standard course described above from the time of hot water cooking to the start of boiling. Heater 14
The time controlled by 00% input is set longer than the standard course, then 50% input is controlled, and when the temperature of pot 17 starts to rise again, rice cooking heater 14 is energized by 100% input and cooking temperature 120 100% input is maintained until the temperature reaches ℃. In addition, the heating pattern of the weak course (Fig. 7) is the same as the heating pattern of the standard course described above from the time of hot water cooking to the start of boiling, but the rice cooking heater 14 inputs 100% at the initial boiling stage. The time controlled by is set shorter than the standard course, and then the rice cooking heater 14 is controlled by 30% input and maintained at 30% input until the cooking temperature reaches 115 ° C. That is, in the heating / decreasing selection means, the heating pattern differs between the courses in the boiling heating step in the early stage of boiling and in the boiling continuing step after the boiling heating step among the steps up to the cooking.

In addition, the detection of the amount of rice in the strong course is 5 deg.
Below / 5'20 ", large amount, below 5deg / 60", small amount,
Less than 5deg / 2 'on large course, 5deg or less /
Each is detected as a small amount at 60 ″.

[0022] In order your food, which raised cook is delicious, the hard eyes, regardless of the transfer of soft eyes, it is necessary to moderate stickiness. Factors that stickiness of your rice is no longer in rice stroke, like speed of up to boiling. In other words, if the speed until boiling is slow, the temperature at which rice begins to gelatinize (55 to 70 ° C)
The time from boiling to boiling will be longer, so when boiling is complete (98 ° C
Compared to the above), alpha energy becomes smaller between (55 ~ 70 ℃) ~ 98 ℃ (because energy is used for water heating)
Therefore, the energy of the whole rice becomes alpha, but only the peripheral surface of the rice becomes alpha, and if it continues to boil from this state, only the peripheral surface of the rice becomes excessive alpha, and the so-called sticky boiling it becomes your rice. Ideally, the time from the start of substantial rice cooking to boiling is 5 to 15 minutes, and thus, in any of the standard, high-strength, and low-dose courses, until boiling starts after hot water is cooked. During this period, the rice heating heater is fully energized to keep the time until boiling constant.

In the strong course, the full energization time in the initial stage of boiling is set longer than in the standard course, and the rice cooking heater is fully energized before cooking to increase the power consumption as compared with the standard course. Therefore modest burnt the moon in your rice, also to promote the evaporation of the free water adhering to the circumferential surface of the rice, sticky Although there are climb cook have any rice of low water content of the hard eyes. On the other hand, in the weak course, while shortening the full energization time in the initial stage of boiling compared to the standard course,
After that, the power consumption of the rice cooker is reduced from that of the standard course, and the cooking temperature is set to 115 ° C, which is lower than the standard course.
Relatively high almost burnt-free soft eyes of your rice moisture content is climb cook. In other words, in this example, after boiling, cook
By changing the heating amount until the temperature reaches
In addition to the white rice cooked heating pattern, the water content is higher than the standard.
White rice cooked rice heating pattern to cook rice and than standard
Rice rice heating putter that cooks rice with low water content
It is designed so that the flame can be selected by the heat adjustment selection means.

Further, the selection switch 25 changes the combination of voltage dividing resistors (not shown) by its switching operation, so that the standard course is [L, L] signal, the strong course is [L, H] signal, The weak course is set as an [H, L] signal. The control means 30 keeps the selected course when the signal from the selection switch 25 is read out at every constant time, for example, every 0.25 ″ except during the rice cooking process and the heat retention process, when the same selection signal is read twice or more. , When the rice cooking menu is selected as white rice cooking and the start switch is operated or the start signal is output during timer rice cooking, the rice cooking is executed with the heating pattern corresponding to the held course. This signal is not read even if the selection switch 25 is switched during the heat retention process, and when the start signal is operated or when the start signal is output during timer rice cooking, the signal switched by the selection switch 25 is displayed. The white rice cooked on the basis of the selected course is executed.

That is, if the heating pattern is switched during the rice cooking, the heating pattern will be changed between the time when the rice is cooked and the time when the rice is switched, and the heating pattern is changed after that. become a heating pattern that was different from the eyes of the heating pattern, or cause boil over in the rice, it tends to be your food or your rice marked with Becak, leaving a core. Therefore, by directly cooking without read it even if switching of the course of rice cooking in cooking stroke in and kept stroke in this embodiment, so that delicious your meal is obtained. When rice is cooked next time, it is canceled and started, so the course switched during the rice cooking process is read and held, and the rice cooked by this course is executed. Also, once select switch 25
Select switch every time you start white rice cooking by switching
25 signals are read and held, so read and hold at the start of rice cooking
The rice can be cooked in the course every time with the same heating pattern of cooked rice, and it is not necessary to operate the selection switch 25 each time the rice is cooked.

As described above, in the above embodiment, the selection switch 25 is selectively operated according to the preference of standard, hard, and soft, so that the boiling rice in each step until the white rice in the pan 17 is cooked is boiled. In the initial boiling heating process and in the boiling continuing process after this boiling heating process, from the start of boiling in the corresponding cooked rice until the cooking temperature is reached.
Since the heating pattern is specified and the rice cooked with this heating pattern is executed, the time until boiling is kept constant.
By keeping it, it will give a moderately scorching hardness to your taste.
Your rice and, it is possible to increase cook in a state of moderate to a sticky does not remain the core of your rice softer in reverse. Moreover, since the selection switch 25 is provided on the operation panel 21 mounted on the lid 18, the operability is good and the operation switch 24
It is convenient because the operation can be performed while checking at the same time as the display 23. Further, since the selection switch 25 is a rotary type while the operation switch 24 is a push type, the selection switch 25 can be easily distinguished from the operation switch 24, and the switch operation at the time of rice cooking is easy. is there. Further, since the operation panel 21 forms the conical surface 22 having the inclination angle α of 40 °, the operation panel 21 is easy to operate, and the display unit 23 can be easily seen even from a distance. In this case, the operation switch 24 may be provided in the vicinity of the operation panel 21 as shown in FIG. 8, and the selection switch 25 and the operation switch 24 can be distinguished by the difference in color, shape, size or the like. May be. Also, the signal of the selection switch 25 is read every 0.25 ″ except during the rice cooking process and the heat retention process, and the same course is held when the same course is read twice or more consecutively, and the held course is set to the held course at the time of rice cooking start. The rice is cooked with the corresponding heating pattern, and even if the selection switch 25 is switched during the rice cooking process and the heat retention process, the signal is not read, and the rice cooking is performed based on the signal at the next start time. because you are way, your food preferences be in the middle of rice vary heating pattern has been selected without can be obtained. in addition, once by operating the selection switch 25, the rice can be white rice cooker at the course every time It is not necessary to operate the selection switch 25 each time, and the operation of cooked rice is easy.

The present invention is not limited to the above embodiment, and various modifications can be made within the scope of the present invention. For example, in the embodiment, the heating pattern in the boiling heating process and the boiling continuing process are configured to be controlled differently, but the heating pattern of at least one process is changed among the processes up to cooking. Alternatively, the heating pattern during the hot water cooking process may be changed.

[0028]

The present invention relates to a container and a container for heating the container.
Heating means and temperature detecting means for detecting the temperature of the container
Control the input to the heating means according to the temperature of the container.
Control means to control and until boiling temperature after boiling
By changing the heating amount between
In addition to the heat pattern, cook on rice that has a higher water content than the standard
Raise the white rice cooked heating pattern and lower the water content than the standard
Select rice cooked with white rice and heating pattern
The heat adjustment means, and each of the white rice in the heat adjustment selection means.
A selection switch that outputs a signal to select the cooking rice heating pattern.
Equipped with a chi
Even if there is a switch operation of the switch, the signal reading is invalidated,
The heating pattern of white rice cooked rice that is read and held at the start of rice cooking
It is configured to run rice as it is, and the same
It can be above gel cooked white rice to the hardness of the three stages in the Mizukagen
At the same time, delicious rice with moderate stickiness is obtained and cooked.
Cooking pattern does not change in the middle of rice
Rice cooker that does not need to operate the selection switch every time
Can be provided.

[Brief description of drawings]

FIG. 1 is an overall perspective view of a rice cooker.

FIG. 2 is an overall enlarged sectional view of the same.

FIG. 3 is a front view of the same operation panel.

FIG. 4 is a sectional view of the same selection switch as above.

FIG. 5 is a block diagram of the same.

FIG. 6 is a graph showing the rice cooking process of when to raise cook your rice of the same hard eyes.

FIG. 7 is a graph showing the rice cooking process of when to raise cook your rice of the same soft eyes.

FIG. 8 is a front view showing an operation panel and a selection switch of another embodiment.

FIG. 9 is a cross-sectional view showing a general structure of a rice cooker.

FIG. 10 is a graph showing a standard rice cooking process.

[Explanation of symbols]

14 Rice-cooking heater (heating means) 17 Pan (vessel) 25 Selection switch 29 Temperature detection means 30 Control means (flame adjustment selection means)

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroaki Kawaguchi 2570 Gosuda, Kamo City, Niigata Prefecture 1 Toshiba Home Techno Co., Ltd. (56) References JP-A-58-209314 (JP, A) JP-A-62 -138152 (JP, A) JP-A-63-71216 (JP, A)

Claims (1)

[Claims] 1. A container, heating means for heating the container, temperature detecting means for detecting the temperature of the container, control means for controlling an input to the heating means according to the temperature of the container, and after boiling. Heating from the time until the cooking temperature is reached
Standard white rice cooking heating pattern by changing the amount
Besides, white rice cooked in rice with a higher water content than the standard
For cooking rice heating pattern and rice with less water content than standard
Heated selection to select the white rice cooked heating pattern to be cooked
Selecting means, and the heating control adjusting means to each of the white rice cooked rice heating
Equipped with a selection switch that outputs a signal to select the turn
E, during the rice cooking process and the heat retention process, press the selection switch
Even if there is a switching operation, invalidate the signal reading and start rice cooking
Rice cooked with white rice cooked as it is read and held
A rice cooker characterized by being configured to perform .