JP2001198007A - Rice cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make the temperature in an inner kettle uniform without the occurrence of crumbling by boiling and boiling over, to give rise to small pits and to beautifully finish cooked rice by temporarily vigorously giving rise to the convection in the inner kettle in the boiling start time. SOLUTION: When the inside of the inner kettle 2 attains an approximately boiling state, high electric power is made by a temporary adding means 11 for a heating quantity controlled by a main heating control means 7 so as to temporarily make the heating electric power higher than in any other time and the heating operation of both heating means and lid heating means is stopped to prevent the breaker from being activated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rice cooker capable of arbitrarily adjusting heating power, and an object of the present invention is to make rice cooked delicious.

[0002]

2. Description of the Related Art A conventional rice cooker generally controls the heating of "Let's turn on the fire ..." in the old tradition.

[0003] That is, at the beginning of rice cooking, a step of heating the water in the inner pot to a level of lukewarm water by heating at a low heat and maintaining the temperature to promote the absorption of water into the rice (starting at the beginning) is provided. The step of heating and boiling with the maximum electric power (medium papper) is performed. When it boils,
Switch to the step of reducing the amount of heating so that the spill does not occur (by turning on the fire when it's sloppy). Thereafter, when the rice in the inner pot sucks water and runs out of water, the temperature of the inner pot rises rapidly.
The rice is cooked through a process (steaming) in which the heating is stopped so as not to be scorched and then kept at a low temperature for a certain period of time.

Japanese Patent No. 2707225 discloses an invention relating to the above-described series of rice cooking control.

[0005]

In the above-mentioned conventional rice cooker, the amount of heating is reduced around the time of boiling. Therefore, even if there is a part in the inner pot where the temperature has not yet reached the boiling temperature, the amount of heating is reduced. As a result, the temperature does not rise sufficiently, and the whole does not cook deliciously.

[0006] Further, since the whole is boiled, it does not reach a state of intense boiling, so that the boiling water causes the convection of the hot water at the bottom of the inner pot to violently convection upward, that is, the so-called "crab hole" is cooked without being formed. There was a problem.

In order to solve the above-mentioned problem, a high heating amount is required beyond the step of heating at a stroke until boiling. However, it is difficult to realize a high heating amount due to the circumstances of the home power supply capacity.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned conventional problems. When the inside of an inner pot reaches substantially boiling, the heating power is temporarily supplied to the main body at any other time. A heating amount temporary adding means controlled by the main heating control means so as to increase the heating amount temporarily when the inside of the inner kettle substantially reaches a boiling state. This causes strong convection in the inner pot, which raises the temperature of the part where the temperature did not rise to the boiling point due to temperature unevenness inside the inner pot, and also generated crab holes, resulting in delicious rice. Can be finished.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS According to a first aspect of the present invention, an inner pot which is removably inserted into a main body, a lid which covers an opening of the main body and the inner pot, a main heating means for heating the inner pot, and a main heating means In the rice cooker provided with the main heating control means for adjusting the heating power in the means, when the inside of the inner pot reaches substantially boiling with the progress of rice cooking, the heating power is temporarily made higher than at any other time. Thus, a heating amount temporary adding means controlled by the main heating control means is provided.

According to a second aspect of the present invention, in a rice cooker provided with a side surface heating means for heating a side surface of the inner pot and a side surface heating control means for controlling energization to the side heating means, the heating amount temporary adding means is provided. During the operation, the power supply to the side surface heating means is stopped by the side surface heating control means.

Further, in a rice cooker provided with a lid heating means in the lid and a lid heating control means in the main body for controlling energization of the lid heating means, the lid is operated during the operation of the heating amount temporary adding means. The power supply to the lid heating means is stopped by the heating control means.

[0012] This makes it possible to finish delicious rice with crab holes, reduce the power of the side heating means and the lid heating means, and temporarily transfer the power to the main heating means. Cooking rice can be prevented from being interrupted on the way.

[0013]

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

FIG. 1 is an explanatory view showing a rice cooking process of one embodiment of the rice cooker of the present invention, FIG. 2 is a longitudinal sectional view of the rice cooker, FIG. 3 is a circuit configuration diagram of the rice cooker, and FIG. It is explanatory drawing which shows the rice cooking process of a rice cooker.

In the figure, 1 is a main body, 2 is an inner pot, 3 is a main heating means, 4 is a lid, 5 is a side heating means, 6 is a lid heating means, 7 is a main heating control means, and 8 is a side heating control means. , 9
Is a lid heating control unit, 10 is a control unit, 11 is a heating amount temporary adding unit, 12 is a bottom sensor, and 13 is a lid sensor.

Next, the configuration will be described in detail.
An inner pot 2 is detachably inserted into the inner pot 2, and a main heating means 3 is provided below the inner pot 2. The main heating means 3 is constituted by a coil for electromagnetic induction heating, and the inner pot 2 generates heat by a high-frequency magnetic field generated from the coil.

A lid 4 is provided on the upper surface of the main body 1 so as to be openable and closable so as to cover the upper openings of the main body 1 and the inner pot 2.

A side surface heating means 5 is provided on a side surface of the main body 1. The side surface heating means 5 is constituted by a 40 W resistance wire heater, and is configured to heat the side surface of the inner pot 2.

The lid 4 has a lid heating means 6 composed of a 60 W resistance wire heater for heating the surface facing the inner pot 2.
Is provided.

Further, the main body 1 is provided with a main heating control means 7 for controlling energization to the main heating means 3. The main heating control means 7 is configured such that the amount of heating of the main heating means 3 can be arbitrarily adjusted by an inverter circuit.

Further, the main body 1 is provided with side heating control means 8 for controlling the energization of the side heating means 5 and lid heating control means 9 for controlling the energization of the lid heating means 6.

The main unit 1 is also provided with a control unit 10,
There is provided a function of controlling the rice cooking process and adjusting the heating amount by operating the main heating control means 7, the side heating control means 8, and the lid heating control means 9.

The control section 10 is also provided with a heating amount temporary adding means 11 which detects a substantially boiling state and operates temporarily at this time.

Further, a bottom sensor 12 is provided on the main body 1 to measure the temperature of the bottom of the inner pot 2 and input temperature information to the control unit 10.

The lid 4 is provided with a lid sensor 13, which measures the temperature of the lid 4 and inputs temperature information to the control unit 10.

Next, the operation of the above configuration will be described with reference to FIG.

When the user puts the washed rice and an appropriate amount of water into the inner pot 2 and inserts it into the main body 1, closes the lid 4 and operates a rice cooker switch (not shown), a rice cooker start command is sent to the controller 10. It is transmitted and rice cooking starts.

Side heating control means 8, lid heating control means 9
As a result, electricity is supplied to the side surface heating means 5 and the lid heating means 6,
Heating is started at 40 W and 60 W, respectively.

At the same time, the main heating means 3 starts heating at 400 W by the main heating control means 7.

When the temperature of the bottom sensor 12 rises and the temperature of the inner pot 2 becomes 50 ° C. or more, the heating of the main heating means 3 is stopped, and when the temperature becomes lower than 48 ° C., the heating of 400 W is restarted. Control is performed to keep the temperature of No. 2 at about 50 ° C.

During this time, when the temperature of the lid sensor 13 becomes 60 ° C. or higher, the heating of the lid heating means 6 is stopped, and when the temperature of the lid sensor 13 becomes lower than 58 ° C., the heating is resumed.
C., and the rice and water in the inner pot 2 are heated from the lid 4 as well.

Eventually, 15 minutes after the start of rice cooking,
The process of “beginning chorochoro” to absorb water into rice is completed,
The main heating means 3 starts heating at 1000 W by the main heating control means 7. This is a so-called “middle papper” step, whereby the temperature inside the inner pot 2 is raised at a stretch toward boiling. The 1000 W is an electric power sufficient for boiling within a certain time and is determined as a moderate electric power which does not disturb boiling.

When the inside of the inner pot 2 boils over time, the generated steam heats the lid 4, and the temperature rises above the control temperature of 60 ° C. by the lid sensor 13. When the temperature of the lid sensor 13 exceeds 80 ° C., the control unit 10 determines that a considerable amount of steam has been generated, and determines that boiling has occurred.

When it is determined that the boiling has occurred, the inside of the inner pot 2 is filled with steam, but there is a region where the temperature has not yet sufficiently risen locally because rice has poor heat convection.

Here, as is generally said in the phrase "burn a fire when it is sloppy", it is common to reduce the amount of heating as shown in FIG. 4, but if the amount of heating is reduced here, the temperature rises. Unexposed parts are left as they are, resulting in uneven cooking and unpleasant finish. In addition, since there is no strong convection, there is no trace of hot water at the bottom breaking through the resistance of the rice and convection, a so-called “crab hole”.

In the present invention, when the boiling is detected as shown in FIG. 1, the heating amount temporary adding means 11 operates. As a result, the main heating means 3 is temporarily switched to high power by the main heating control means 7.

In this embodiment, 1400 W of electric power is supplied for one minute. At this time, the 40W side heating means 5 and 60
When the lid heating means 6 of W is performing a heating operation, a total of 150
It is 0W, and there is a possibility that a 15A power breaker for home use may operate. Therefore, it is conceivable to set the temporary large power a little lower. However, in this embodiment, the side heating control means 8 and the lid heating control means 9 are operated and the side heating Since the power supply to the means 5 and the lid heating means 6 is stopped, the power consumption of the main heating means 3 is only 1400 W (current 14 A). 3 can be operated.

As a result, intense convection occurs, a crab hole is formed, the temperature inside the inner pot 2 is made uniform, and a portion where the temperature rise is poor reaches the boiling point at a stretch.

When a sufficient time (one minute in the present embodiment) elapses to obtain the above-described operation, the operation of the heating amount temporary adding means 11 ends. After that, the power of the main heating means 3 is reduced by the main heating control means 7 as the power that does not cause the rice to be boiled and does not spill over, as taught as “to catch fire when the rice is sullen”. In this embodiment, the amount is reduced to 800 W when the amount of rice is large and to 400 W when the amount of rice is small.

After the power is reduced, the side heating control means 8 and the lid heating control means 9 operate to restart the power supply to the side heating means 5 and the lid heating means 6.

Eventually, when the rice inside the inner pot 2 absorbs water and runs out of water, the temperature of the bottom sensor 12 rises rapidly, catching this, the controller 10 finishes cooking rice and shifts to steaming.

After a lapse of a predetermined time, the control section 10 ends the steaming, and the rice cooking is completed.

In the present embodiment, the detection of boiling, that is, the operation timing of the heating amount temporary adding means 11 is detected by the rise in the temperature of the lid sensor 13. However, the present invention is not limited to this. In the process from to boiling, the amount of cooked rice may be determined, and the heating amount temporary adding means 11 may be operated assuming that the boiling state has been reached at a time determined according to the amount.

In short, it is only necessary that a heating amount higher than that of any other process is temporarily supplied during a substantially boiling state to generate strong convection inside and boil evenly.

[0045]

As described above, the present invention provides a main heating control means for temporarily increasing the heating power when the inside of an inner pot reaches substantially boiling with the progress of rice cooking, as compared with any other time. Because of the provision of heating amount temporary addition means controlled by the above, severe convection occurs inside the inner pot and crab holes are formed, and the temperature of the part where the temperature did not rise to the boiling point due to uneven heating is also raised, and delicious rice Can be finished.

Further, during the operation of the heating amount temporary adding means, the power supply to the side heating means and the lid heating means is stopped, so that the maximum electric power can be supplied to the main heating means without causing a breaker operation. , Can be more effective.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a rice cooking process of one embodiment of the rice cooker of the present invention.

FIG. 2 is a longitudinal sectional view of a rice cooker according to one embodiment of the present invention.

FIG. 3 is a circuit configuration diagram of a rice cooker according to one embodiment of the present invention.

FIG. 4 is an explanatory diagram showing a rice cooking process of a conventional rice cooker.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body 2 Inner pot 3 Main heating means 4 Lid 5 Side heating means 6 Lid heating means 7 Main heating control means 8 Side heating control means 9 Lid heating control means 10 Control unit 11 Temporary heating amount adding means 12 Bottom sensor 13 Lid sensor

Continuation of the front page F term (reference) 4B055 BA62 CA05 CA22 DA02 DA03 DA04 DB01 GB03 GB07 GB08 GC13 GD01 GD05

Claims (3)

[Claims] An inner pot (2) detachably inserted into a main body (1), a main heating means (3) for heating the inner pot (2),
In the rice cooker provided with the main heating control means (7) for adjusting the heating power in the main heating means (3), when the inside of the inner pot (2) reaches substantially boiling as the rice cooks, The rice cooker further comprising a heating amount temporary adding means (11) controlled by the main heating control means (7) so as to make the heating power higher than at any other time. 2. A side surface heating means (5) for heating the side surface of the inner pot (2) and a side surface heating control means (8) for controlling energization of the side surface heating means (5) are provided on the main body (1). 2. The rice cooker according to claim 1, wherein the power supply to the side heating means is stopped by the side heating control means during the operation of the heating amount temporary adding means in the rice cooker. . 3. A rice cooker in which a lid (4) is provided with a lid heating means (6) and a main body (1) is provided with a lid heating control means (9) for controlling energization of the lid heating means (6). 2. The rice cooker according to claim 1, wherein the power supply to the lid heating means (6) is stopped by the lid heating control means (9) during the operation of the heating amount temporary adding means (11).