JP2015008793A - Rice cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rice cooker including a rice cooking mode to be able to obtain eating quality close to or equivalent to normal rice cooking though rice is cooked earlier than the normal rice cooking in the rice cooking mode.SOLUTION: A rice cooker includes: a body; an inner case; an inner pot; a lid body; heating means for heating the inner pot; a bottom part temperature sensor; a lid temperature sensor; an operation part; display means; and control means for controlling current carrying of the heating means on the basis of a temperature detection result of the bottom part temperature sensor or the lid temperature sensor. The control means can select a rice cooking mode having respective processes of preheating, cooking, boiling maintenance, and steaming by the operation part. The rice cooking modes include: a first rice cooking mode; a second rice cooking mode in which a rice cooking time is shorter than the first rice cooking mode; and a third rice cooking mode in which a rice cooking time is shorter than the first rice cooking mode and longer than the second rice cooking mode. When executing the third rice cooking mode, the control means makes a time of the preheating process longer than a time of the preheating process of the second rice cooking mode.

Description

  The present invention relates to a rice cooker mainly used at home, and more particularly to a rice cooker having a plurality of rice cooking modes having different conditions such as heating.

  Conventionally, there are several rice cooking courses with different cooking conditions, and in these courses, rice cookers that can cook rice faster than normal rice cooking courses, for example, have a quick cooking course are known (For example, refer to Patent Document 1).

Japanese Patent No. 348697 (page 4, FIG. 1)

  In the configuration of the rice cooker described in Patent Document 1, there is only one kind of rice cooking course related to quick cooking, and the early cooking course cooks rice faster than a normal rice cooking course, so the rice cooking time is shortened.

To explain in more detail, the quick-cooking course shortens the water absorption time to the rice, which greatly affects the taste of the cooked rice, and the heating time to fully gelatinize the starch, compared to the regular rice cooking course. It is a cooking rice course.

In other words, the priority is to cook it quickly over the deliciousness of the cooked rice, so it is easy to use as a rice cooking course, but the user's satisfaction with the deliciousness of the cooked rice is low. there were.

  In order to solve this problem, the present invention provides a rice cooker equipped with a rice cooking mode capable of obtaining a taste close to or equivalent to that of normal rice cooking while being a rice cooking mode of cooking earlier than normal rice cooking. For the purpose.

  A rice cooker according to the present invention that solves the problem includes a main body, an inner case provided in the main body, and an upper case that is open, and an inner pot that accommodates rice to be cooked in and out of the inner case. A lid that is pivotally provided on the main body and covers the upper side of the inner hook, a heating means that is provided in the main body and that heats the inner hook, and is provided at the bottom of the inner case. A bottom temperature sensor for detecting, a lid temperature sensor provided on the lid for detecting the temperature inside the inner pot, an operation unit for performing an operation input, a display means for displaying an input result from the operation unit, and a bottom Control means for controlling energization of the heating means based on temperature detection results from either the temperature sensor or the lid temperature sensor, or both, and the control means is for preheating, cooking, maintaining boiling, and unevenness. Plural with each step The rice cooking mode can be selected by the operation unit, and at least the plurality of rice cooking modes include the first rice cooking mode for performing normal rice cooking, the second rice cooking mode for which the rice cooking time is shorter than the first rice cooking mode, The rice cooking mode is shorter than the first rice cooking mode and has a third rice cooking mode that is longer than the second rice cooking mode. When the control means executes the third rice cooking mode, The time for the preheating step is longer than the time for the preheating step in the second rice cooking mode.

  According to the present invention, a plurality of rice cooking modes are provided, and the plurality of rice cooking modes include a first rice cooking mode for performing normal rice cooking, a second rice cooking mode in which the rice cooking time is shorter than the first rice cooking mode, When the third rice cooking mode is executed and the third rice cooking mode is executed, at least the preheating step is performed when the rice cooking time is shorter than the first rice cooking mode and the rice cooking time is longer than the second rice cooking mode. Since the time is longer than the time of the preheating process of the second rice cooking mode, using the third rice cooking mode, it is a rice cooking mode that cooks faster than normal rice cooking, but the taste close to normal cooking rice Be able to get.

It is a perspective view which shows schematic structure of the rice cooker which concerns on Embodiment 1 of this invention. It is a perspective view of the state which opened the cover which shows schematic structure of the rice cooker which concerns on Embodiment 1 of this invention. It is sectional drawing which shows the internal structure of the rice cooker which concerns on Embodiment 1 of this invention. It is a schematic exploded view of the cover body of the rice cooker which concerns on Embodiment 1 of this invention. It is the schematic of the display content and operation part of the display means of the rice cooker which concerns on Embodiment 1 of this invention. It is a block diagram which shows schematic structure of the rice cooker which concerns on Embodiment 1 of this invention. It is a flowchart of the rice cooker which concerns on Embodiment 1 of this invention. (A) The figure which shows the detection temperature transition time of the bottom part temperature sensor in the rice cooking process of the "normal" mode (1st rice cooking mode) of the rice cooker which concerns on Embodiment 1 of this invention, (b) Implementation of this invention The figure which shows the detection temperature transition time of the bottom part temperature sensor in the rice cooking process of the "quick cooking 1" mode (2nd rice cooking mode) of the rice cooker which concerns on form 1, (c) The rice cooker which concerns on Embodiment 1 of this invention It is a figure which shows the detection temperature transition time of the bottom part temperature sensor in the rice cooking process of "early cooking 2" mode (3rd rice cooking mode). It is a block diagram which shows schematic structure of the rice cooker which concerns on Embodiment 2 of this invention. It is a flowchart of the rice cooker which concerns on Embodiment 2 of this invention. It is the schematic of the display content and operation part of the display means of the rice cooker which concerns on Embodiment 3 of this invention. It is a block diagram which shows schematic structure of the rice cooker which concerns on Embodiment 3 of this invention. It is a flowchart of the rice cooker which concerns on Embodiment 3 of this invention. It is a graph of the answer result of the user of each age of a life fact-finding.

Embodiment 1 FIG.
(Overall configuration)
1 is a perspective view showing a schematic configuration of a rice cooker according to Embodiment 1 of the present invention, and FIG. 2 is a perspective view of a state in which a lid is opened showing the schematic configuration of the rice cooker according to Embodiment 1 of the present invention. 3 is a sectional view showing the internal configuration of the rice cooker according to Embodiment 1 of the present invention, FIG. 4 is a schematic exploded view of the lid of the rice cooker according to Embodiment 1 of the present invention, and FIG. 5 is the present invention. FIG. 6 is a block diagram showing a schematic configuration of the rice cooker according to the first embodiment of the present invention, and FIG. 6 is a schematic diagram of the display contents of the display means of the rice cooker according to the first embodiment and the operation unit. The schematic overall configuration of the rice cooker according to Embodiment 1 of the present invention will be described with reference to FIGS.

  As shown in FIG. 1, reference numeral 100 denotes a rice cooker according to Embodiment 1 of the present invention, which includes a main body 1 and a lid 2. The main body 1 and the lid body 2 are each made of a resin material according to the application, and are formed by resin molding, for example. However, the body 1 and the lid body 2 are not necessarily limited to the resin material. May be used.

  As shown in FIG. 1, the lid 2 has a lid upper surface cover 2 a, and the lid upper surface cover 2 a near the front of the lid 2 has an inside of the lid 2 below the lid upper surface cover 2 a. A transparent display window 4 is provided in which the display content of the display means 15 provided in the substrate chamber 2d, which is a space, for displaying the operation result and the operation status can be visually recognized.

Around the display window 4, an operation unit 3 for operating the rice cooker 100 is provided. On the left side of the display window 4, a rice type selection switch 3a that can select the type of rice such as white rice or non-washed rice. A menu switch 3b for selecting a rice cooking menu such as cooked rice and rice crackers, a simmering rice cooker switch 3c for cooking rice making the best use of the taste of rice, and a switch 3d for stopping / switching the type of heat insulation. Is provided.

On the right side of the display window 4 is a mode in which the rice can be cooked faster than the “normal” mode (first rice cooking mode) in which normal rice is cooked, the “early cooking 1” mode (second cooking rice mode) or “fast cooking”. 2 ”quick cooking selection switch 3e that can select one of the modes (third cooking mode), reservation switch 3f for cooking according to the time you want to eat, time setting switch 3g for setting the reservation time and current time, rice cooking Various operation switches of the rice cooking start switch 3h for starting the cooking are provided, and the result of the operation input as shown in FIG.

In addition, the display example of the display means 15 shown in FIG. 5 is an example of a state in which all displayable display contents are displayed, and not all these displays are displayed during actual operation, but only necessary information is displayed. Explain that it is displayed.

  As shown in FIG. 4, the lid body 2 is provided with a substrate chamber 2d near the front thereof, and the operation display substrate 14 is accommodated in the substrate chamber 2d. On the operation display board 14, a push-type switch (not shown) for inputting from various operation switches 3 a to 3 h of the operation unit 3 and a display unit 15 are mounted via a holding member 16. The operation display board 14 is electrically connected to the control board 9 by a flat cable (not shown).

  Operation buttons 16a to 16h for transmitting and pressing inputs from the various operation switches 3a to 3h of the operation unit 3 to a pressing switch (not shown) are connected to the holding member 16 by two arms (not shown). Are integrally formed.

Two arms (not shown) are flexible. For example, when the rice selection switch 3a that is an operation switch of the operation unit 3 with respect to the operation button 16a is operated and input, the two arms are bent and the operation button 16a is moved. The input is performed by pressing the button and further pressing a pressing switch (not shown).

  A seal holding groove 2e is provided around the substrate chamber 2d, and a substrate chamber seal 18 formed of an elastic material such as silicon rubber is inserted into the groove. When the cover upper surface cover 2a is attached after the operation display substrate 14 is accommodated in the substrate chamber 2d, the substrate chamber seal 18 and the lid upper surface cover 2a come into contact with the entire circumference of the substrate chamber 2d, and insects and It prevents intrusion of steam and the like.

Further, a display unit seal 17 formed of an elastic material such as silicon rubber, which is sandwiched between the outer periphery of the holding member 16 and the lid upper surface cover 2a, is provided on the entire periphery of the display unit 15, and is provided on the display panel surface. It is designed to prevent insects and steam from entering.

And the exhaust port 2b which discharges | emits the vapor | steam generate | occur | produced at the time of rice cooking is provided in the back side of the cover body 2. As shown in FIG. In the first embodiment of the present invention, a rice cooker of a type that discharges steam to the outside of the main body is described. However, a rice cooker of a type that does not discharge steam to the outside of the main body may be used. Is not provided.

  As shown in FIG. 2, a locking portion 5 a is provided in front of the upper surface of the main body, and an engaging portion (not shown) provided on the lid body 2 is engaged with the locking portion 5 a, so that the lid body 2 is connected to the main body 1. The top surface of is closed. The lid 2 is pivotally supported at the rear end thereof on a pivot shaft 8a shown in FIG.

The lid 2 is disengaged from the engaging portion (not shown) and the engaging portion 5a by pushing a locking release button 5 provided in front of the main body 1, and is opened around the rotation shaft 8a. By a biasing means (not shown) that applies a biasing force in the direction to the lid body 2, it is rotated and released to a predetermined position.

  As shown in FIG. 2, an inner case 1 a having an opening is provided at the center of the main body 1, and an inner pot 6 for containing water and rice as a cooked rice is provided in the opening of the inner case 1 a. Removably stored. An inner lid 7 is provided on the surface of the lid 2 facing the inner hook 6, and the flange 6 a provided on the upper peripheral edge of the inner hook 6 and the inner lid 7 are closed as shown in FIG. 3. A seal packing 7a provided on the outer periphery of the lid 7 is contacted and sealed over the entire periphery.

The inner lid 7 is detachably mounted with a cartridge 7b provided to return the umami component generated during cooking from the cooked rice in the inner pot 6 to the inner pot 6. The cartridge 7b is also provided with a communication port 2c for discharging steam generated during cooking from the cooked rice in the inner pot 6 to the outside. The communication port 2c communicates with the exhaust port 2b.

The inner lid 7 is provided with a lid temperature sensor 7c that detects the temperature inside the inner hook. The lid temperature sensor 7c detects the temperature inside the inner pot 6 at the time of rice cooking, and the temperature data which is the detection result is sent to the control means 9a and used for rice cooking control.

  As shown in FIG. 3, induction heating coils 10 a, 10 b, and 10 c (hereinafter collectively referred to as induction heating coil 10) that are heating means for heating the inner pot 6 and cooking the rice that has been accommodated in the main body 1. May be described.) Is provided. In the present embodiment, an induction heating coil is illustrated as a heating unit, but the present invention is not limited to this, and a radiant heating unit such as a sheathed heater may be used.

  A body heater 13 is provided so as to surround the body portion of the inner hook 6. The body heater 13 is energized during rice cooking and heat retention, and is used for temperature adjustment of rice cooking and heat insulation.

  A bottom temperature sensor 11 is provided inside the heating coil 10a so as to be in contact with the outer central portion of the inner pot 6. The bottom part temperature sensor 11 detects the temperature outside the bottom part of the inner pot 6 at the time of rice cooking, and the temperature data as the detection result is sent to the control means 9a and used for the rice cooking control.

  A control board 9 is provided in a space on the rear (rear) side of the main body 1. The control board 9 receives instructions from the control means 9a including the microcomputer 19 and the memory 20 that control the heating power and time of the rice cooking based on various operation inputs from the operation unit 3 and the temperature detection results of the lid temperature sensor 7c and the bottom temperature sensor 11. Thus, electric power is supplied to the induction heating coil 10.

  The memory 20 of the control means 9a stores a control program for operating the microcomputer 19 in response to operations by various operation switches of the operation unit 3, data of temperature detection results of the lid temperature sensor 7c and the bottom temperature sensor 11, and the like. .

Furthermore, on the control board 9, an inverter circuit 21 that supplies a high-frequency current to the induction heating coil 10 based on an instruction from the control means 9a, and a power supply circuit 22 that is connected to a commercial power source and supplies a power source necessary for the operation of the rice cooker 100. Has been implemented.

  A bottom plate 23 made of a resin material and formed by resin molding is provided below the rice cooker 100, and a cooling fan 12 for cooling the control board 9 and the induction heating coil 10 is attached. The bottom plate 23 is provided with a winding type power cord 13 (not shown).

The cooling fan 12 is disposed below the control board 9 and operates in accordance with an instruction from the control means 9a when rice cooking is started. The outside air is sucked from an intake hole (not shown) provided in the bottom plate 23, and the control board 9 and induction heating are performed. The air is blown to the coil 10 and cooled.

(Operation)
Next, operation | movement of the rice cooker which concerns on Embodiment 1 of this invention with FIG. 7, FIG. 8 is demonstrated. FIG. 7 is a flowchart of the rice cooker according to the first embodiment of the present invention, and FIG. 8A is a rice cooking process in the “normal” mode (first rice cooking mode) of the rice cooker according to the first embodiment of the present invention. The figure which shows the detection temperature transition time of a bottom part temperature sensor, FIG.8 (b) is the bottom part temperature sensor in the rice cooking process of the "early cooking 1" mode (2nd rice cooking mode) of the rice cooker which concerns on Embodiment 1 of this invention. FIG. 8C shows the detected temperature transition time of the rice, and the detected temperature of the bottom temperature sensor in the rice cooking process of the “early cooking 2” mode (third rice cooking mode) of the rice cooker according to Embodiment 1 of the present invention. It is a figure which shows transition time.

First, rice and water which are to-be-cooked rice are accommodated in the inner pot 6 (S1), and the kind of rice is selected by the rice type selection switch 3a of the operation unit 3 (S2). The “cooking 2” mode (third cooking mode) is selected (S3) with the quick cooking selection switch 3e of the operation switch of the operation unit 3, and the rice cooking start switch 3h of the operation unit 3 is input (S4). It is started (S5).

The cooking time for each rice cooking mode is 45 minutes for “normal” mode (first rice cooking mode), 23 minutes for “early cooking 1” mode (second rice cooking mode), and “early cooking 2” mode (third rice cooking mode). Mode) is set to 30 minutes.

“Fast cooking 2” that allows cooking close to the taste of “normal” mode (first cooking mode) while being shorter than the cooking time of “normal” mode (first cooking mode) of Embodiment 1 of the present invention. The time setting of the mode (third rice cooking mode) is about 30 minutes with the same 3 hours of general rice cooking as the answer results of the users of each age of the lifestyle survey shown in FIG. This is a set value because there are many users who are attracted to the rice cooker.

  As a rice cooking process, it is comprised by the process of A, B, C, and D, as shown by (a), (b), (c) in FIG. A is a preheating step for causing the rice to absorb water, B is a cooking step for boiling the water that is to-be-cooked rice, and C is for maintaining the boiling state to simultaneously absorb water into the rice and evaporate excess water. The boiling maintaining process of eliminating the water in the inner pot 6 while gelatinizing the starch of rice, and C is an uneven process of steaming the cooked rice to finish the state in the inner pot 6 uniformly.

  In preheating step A, the rice is soaked in water at a temperature lower than the temperature at which the rice is gelatinized, and the rice is preliminarily absorbed, so that it is sufficiently gelatinized to the center of the rice in the subsequent steps, particularly in the boiling maintenance step of C. It is a process to make it possible.

In addition, the preheating step A is also a step in which starch is decomposed by an enzyme contained in rice to produce sugar to produce sweetness of rice.

  The preheating step A in the “normal” mode (first rice cooking mode) shown in FIG. 8A is performed by the control means 9a so that the detected temperature T1 of the bottom temperature sensor 11 is maintained at a level for about 20 minutes, for example. Controls the inverter circuit 21 to energize the induction heating coil 10 to perform the heating operation.

On the other hand, the preheating step A in the “early cooking 1” mode (second rice cooking mode) shown in FIG. 8B increases the holding temperature so as to promote water absorption even for a short time, for example, for about 5 minutes. Thus, the control means 9a controls the inverter circuit 21 so that the induction heating coil 10 is energized to perform the heating operation so that the detected temperature T2 of the bottom temperature sensor 11 is maintained at about T1 + 5 ° C., for example.

In addition, the preheating process A in the “quick cooking 2” mode (third rice cooking mode) shown in FIG. 8C is longer than the “quick cooking 1” mode (second cooking rice mode) mode. It is. This was set to 10 minutes by securing as much time as possible for the rice to absorb water in order to improve the taste in the 30 minutes of rice cooking process time for the entire “early cooking 2” mode (third rice cooking mode).

However, since the time is shorter than the preheating step A in the “normal” mode (first rice cooking mode), the detected temperature T3 of the bottom temperature sensor 11 is set to the “normal” mode (first mode) in order to further promote water absorption. The cooking temperature is higher than the detection temperature T1.

If the temperature is extremely increased, excess water (water that has not been absorbed) decreases, and the subsequent boiling maintenance step C may be shortened, so T1 + 3 ° C. was set. Thereby, water can be made to fully absorb in rice, and gelatinization is fully promoted to the center of the rice in the subsequent steps.

  When the preheating process A is completed, the process proceeds to the cooking process B. In the cooking process B, the amount of rice to be cooked, that is, the amount of cooked rice is determined by measuring the time difference from when the bottom temperature sensor 11 reaches a predetermined temperature until the lid temperature sensor 7c reaches the predetermined temperature. Yes.

  When the lid temperature sensor 7c reaches a predetermined temperature, the cooking process B is terminated and the process proceeds to the boiling maintenance process C.

  Boiling maintenance process C is a process which gelatinizes the starch of rice and raises the gelatinization degree to about 50 to 60%.

Here, “gelatinization” refers to a state in which starch in rice is swollen and softened by absorbing water and further applying heat. In the boiling maintenance process C, the control means 9a controls the inverter circuit 21 to control the induction heating coil 10 so that the rice and water in the inner pot 6 maintain the boiling state while the inner pot 6 has water. It energizes and performs heating operation with the thermal power according to the amount of cooked rice (rice cooking amount) determined in the cooking step B.

By this heating operation, water absorption into the rice and evaporation of surplus water are performed at the same time, and when the water in the inner pot 6 disappears while gelatinizing the starch of the rice, the temperature of the inner pot 6 rises and the temperature of the bottom temperature sensor 11 changes. Heating is performed until a predetermined temperature T4 (above the boiling point of water, usually around 130 ° C.) is reached.

In addition, the time of the boiling maintenance process C changes with the quantity (rice cooking amount) of to-be-cooked rice, and when there is much quantity of to-be-cooked rice (rice cooking amount), the time of the boiling maintenance process C will become long, and the time of the whole rice cooking process Will also be long.

Therefore, in the “early cooking 2” mode (third rice cooking mode), the determined amount of cooked rice (rice cooked amount) is the maximum amount of cooked rice so that the time of the boiling maintenance process C does not become longer than necessary. These modes are maintained when the maximum amount of cooked rice is 5 go or less, for example, 3 go or less.

That is, even if the “early cooking 2” mode (third rice cooking mode) is selected, the determined amount of cooked rice (rice cooking amount) is 60% of the maximum cooked rice amount (rice cooking amount), for example. When the amount is more than the above, the subsequent steps are performed in a dedicated control different from the basic “quick cooking 2” mode (third rice cooking mode).

Originally, in the “quick cooking 2” mode (third cooking rice mode), the amount of cooked rice (cooking amount) determined that the time of the boiling maintenance process C does not become longer than necessary is the maximum amount of cooking rice (cooking rice). For example, when the amount is less than 60%, the process time is set longer than the boiling maintenance process C in the “normal” mode (first rice cooking mode). Thereby, the time required for starch gelatinization is ensured in the range where the time of the boiling maintenance process C does not become longer than necessary.

Then, in the “early cooking 2” mode (third rice cooking mode), since the preheating process A is shorter than the “normal” mode (first rice cooking mode), the water absorption amount of rice is “normal” mode (first cooking mode). Therefore, surplus water at the start of the boiling maintenance process C increases.

Therefore, in order to promote the evaporation of surplus water in the boiling maintenance step C, the heating power for maintaining the boiling is set higher than that in the “normal” mode (first rice cooking mode). The heating power of the boiling maintenance process C in the “normal” mode (first rice cooking mode) is about 24.7 Wh, whereas the heating power in the “quick cooking 2” mode (third rice cooking mode) is about 35.6 Wh. It is set and the starch of rice is gelatinized while evaporating excess water by this high thermal power, and the degree of gelatinization can be raised.

  When the boiling maintenance process C is completed, the process proceeds to the unevenness process D. The unevenness process D is a process of further promoting the gelatinization of rice starch and raising the gelatinization degree to nearly 100%. In the unevenness process D, while the rice at the bottom of the inner pot 6 is not burned or dried, the temperature of the rice is prevented from lowering and the gelatinization is promoted to make the state of the rice in the inner pot 6 uniform. Therefore, the pause and heating are alternately repeated several times.

In the “normal” mode (first rice cooking mode), the unevenness process D is around 10 minutes, and in the first 5 minutes, the control means 9a controls the inverter circuit 21 so as to alternately repeat the pause and the heating a plurality of times. The heating coil 10 is energized. During the remaining time, the heating is stopped and the rice is gelatinized.

The unevenness process D in the “early cooking 1” mode (second rice cooking mode) is about 3 minutes, and in the first 2 minutes, the control means 9a controls the inverter circuit 21 so as to repeat the pause and heating alternately several times. Then, the induction heating coil 10 is energized. Similar to the “normal” mode (first rice cooking mode), the heating is stopped for the remaining time, and the rice is gelatinized.

In the “quick cooking 2” mode (third rice cooking mode), the unevenness process D is 5 minutes, and the process time is longer than in the “quick cooking 1” mode (second cooking rice mode) to gelatinize the starch of rice. The time required for further promoting the above and increasing the degree of gelatinization to nearly 100% is secured.

As shown in FIG. 8 (c), the unevenness process D in the “early cooking 2” mode (third rice cooking mode) is such that the control means 9a alternately repeats the pause and heating several times in the process time of 5 minutes. The inverter circuit 21 is controlled to energize the induction heating coil 10.

Unlike the “normal” mode (first cooking mode) and the “quick cooking 1” mode (second cooking mode), heating is not stopped in the process time of 5 minutes. Thereby, it is possible to prevent the temperature of the rice from lowering and to promote gelatinization while avoiding that the rice at the bottom of the inner pot 6 is burnt or dried.

As described above, the rice cooking time in the “early cooking 2” mode (third rice cooking mode) is made shorter than that in the “normal” mode (first rice cooking mode), and the time of the preheating step A in the rice cooking process is “ By promoting the water absorption of rice by making it longer than the “quick cooking 1” mode (second cooking rice mode), the starch contained in the rice is decomposed to produce sugar and produce the sweetness of rice. So, in the “normal” mode (first rice cooking mode), the “normal cooking” mode (first rice cooking mode) is shorter than the “normal cooking mode” (first rice cooking mode), while in the “normal” mode (first rice cooking mode). It is possible to obtain a taste close to that of cooking rice, or a taste equivalent to that of cooking in the “normal” mode (first cooking mode).

Moreover, the time of the preheating process A in the “early cooking 2” mode (third rice cooking mode) is made shorter than the time of the preheating process A in the “normal” mode (first rice cooking mode), and the “early cooking 2” mode The detection temperature T3 of the bottom portion temperature sensor 11 in the preheating step A in (third rice cooking mode) is higher than the detection temperature T1 in the bottom portion temperature sensor 11 in the preheating step A in "normal" mode (first rice cooking mode). Because it is high, water absorption can be promoted in a short time, while in the “normal” mode (first rice cooking mode) while the cooking time is shorter than the “normal” mode (first rice cooking mode) A taste close to cooking rice or an equivalent taste can be obtained.

Furthermore, the rice cooking time in the “early cooking 2” mode (third rice cooking mode) is made shorter than that in the “normal” mode (first rice cooking mode), and the boiling maintenance process C of the rice cooking process When the amount (rice cooking amount) is 60% or less with respect to the maximum amount of rice to be cooked (rice cooking amount), for example, the time of the boiling maintenance process C in the “early cooking 2” mode (third rice cooking mode) is “ Since it is longer than the time of the boiling maintenance process C in the “normal” mode (first cooking mode), the starch of the rice is gelatinized while evaporating excess water, and the degree of gelatinization can be increased. While the cooking time is shorter than that in the first cooking mode), it is possible to obtain a taste close to or equivalent to cooking in the “normal” mode (first cooking mode).

And in order to accelerate | stimulate evaporation of the surplus water in the boiling maintenance process C, the heating power when maintaining the boiling of "early cooking 2" mode (3rd rice cooking mode) is set to "normal" mode (1st rice cooking mode ), The starch of rice can be gelatinized while evaporating excess water, and the degree of gelatinization can be raised, while the cooking time is shorter than the “normal” mode (first rice cooking mode) In addition, it is possible to obtain a taste close to or equivalent to that in the “normal” mode (first rice cooking mode).

Then, the rice cooking time in the “early cooking 2” mode (third rice cooking mode) is made shorter than that in the “normal” mode (first rice cooking mode), and the time of the spotting process D in the rice cooking process is set to “early cooking”. It is longer than the “1” mode (2nd rice cooking mode), further promoting the gelatinization of rice starch and securing the time required to raise the degree of gelatinization to nearly 100%, so the “normal” mode ( While the cooking time is shorter than in the first cooking mode), the taste close to cooking in the “normal” mode (first cooking mode) than in the “early cooking 1” mode (second cooking mode), or “ It becomes possible to obtain the same taste as that in the “normal” mode (first rice cooking mode).

Embodiment 2. FIG.
(Overall configuration)
FIG. 9 is a block diagram showing a schematic configuration of the rice cooker according to Embodiment 2 of the present invention. The overall configuration of the second embodiment of the present invention is different from the configuration of the first embodiment of the present invention in that a weight detection unit 24 and a notification unit 25 are provided. This is the same as the configuration of Form 1. Therefore, here, different configurations will be described, and description of equivalent configurations will be omitted.

  As shown in FIG. 9, the rice cooker according to Embodiment 2 of the present invention includes weight detection means 24 and notification means 25. The weight detection means 24 detects the weight of the cooked rice accommodated in the inner pot 6. About the structure of the weight detection means 24, you may make it detect the weight of the inner pot 6 directly, or may detect the whole weight of the rice cooker 100, and should just be a structure which can detect the weight of to-be-cooked rice. .

The notification means 25 includes sounding means such as a speaker (not shown) and a buzzer for amplifying a sound output signal output from a sound IC (not shown) mounted on the control board 9 or the like, for example. In addition, the notification is not only informed by sound or voice, but may be informed by display, for example, may be displayed on the display means 15, or may be notified by sound or voice (notification means 25) and display (display means). It may be used in combination with 15).

(Operation)
Next, operation | movement of the rice cooker which concerns on Embodiment 2 of this invention with FIG. 10 is demonstrated. FIG. 10 is a flowchart of the rice cooker according to Embodiment 2 of the present invention.

  First, rice and water which are to-be-cooked foods are accommodated in the inner pot 6 (S11), and the kind of rice is selected by the rice type selection switch 3a of the operation unit 3 (S12).

  Next, the weight of the cooked rice accommodated in the inner pot 6 is detected by the weight detection means 24 (S13). When the weight of the cooked rice is not heavier than the predetermined weight in S13, the process proceeds to S14, and the “quick cook 1” mode (second cook rice mode) and “quick cook 2” mode (third cook rice mode) can be selected. Is notified by the notification means 25, the display means 15, or both.

The predetermined weight means the maximum amount of rice to be cooked (rice cooked amount), for example, if 5 go is the maximum amount, the amount of cooked rice 60% of the cooked rice (rice cooked amount) to 5 go. The state which is good and is not heavier than a predetermined weight is a state which is 60% or less of the maximum amount of rice to be cooked (rice cooked), that is, the amount of rice to be cooked (rice cooked) that is 3 go or less. It is.

When you can select “Quick Cook 1” mode (2nd rice cooker mode) or “Quick Cook 2” mode (3rd cook rice mode), use ““ Quick cook 1 ”,“ Quick cook 2 ” I can. ”Is informed by voice or a notification that the buzzer sound different from the buzzer sound at the time of error can be used.

Moreover, when displaying on the display means 15, the same content may be displayed by a character, or the illustration which means that it can be used may be displayed. Furthermore, you may alert | report using a sound and a display together.

  Next, the rice cooking mode is set (S15), and the "early cooking 2" mode (third rice cooking mode) is selected with the quick cooking selection switch 3e of the operation switch of the operation unit 3 (S16), and the rice cooking of the operation unit 3 is started. The switch 3h is input (S19) and rice cooking is started (S20).

  When the weight of the cooked rice is heavier than the predetermined weight in S13, the process proceeds to S14, and the “quick cook 1” mode (second cook rice mode) and “quick cook 2” mode (third cook rice mode) cannot be selected. Is notified by the notification means 25, the display means 15, or both.

In addition, a state heavier than a predetermined weight is a state in which the maximum amount of rice to be cooked (rice cooked), for example, an amount exceeding 60% with respect to 5 go, that is, an amount of cooked rice exceeding 3 go (rice cooked). That is.

  The notification when “Quick Cooking 1” mode (2nd rice cooking mode) and “Quick Cooking 2” mode (3rd rice cooking mode) cannot be selected is “Because there is a lot of rice,“ Quick cooking 1 ”,“ Quick cooking ” Use of “2” is not recommended. Cook rice in "normal" mode. ”Is informed by voice or a notification that the buzzer sound different from the buzzer sound at the time of error cannot be used.

Moreover, when displaying on the display means 15, the same content may be displayed by a character, or the illustration which means that it cannot be used may be displayed. Furthermore, you may alert | report using a sound and a display together.

  Next, in S18, the “normal cooking 1” mode (second cooking rice mode) and the “quick cooking 2” mode (third cooking rice mode) are not accepted, and the “normal” cooking mode (first cooking rice mode). ) Only so that it can be selected.

The “normal” mode (first rice cooking mode) is accepted by the menu switch 3b. However, if the quick cooking selection switch 3e is inputted in the forward order, the “early cooking 2” mode (third rice cooking mode), “ Since it is possible to select “quick cooking 1” mode (second cooking rice mode) and “normal cooking” mode (first cooking rice mode), even if “normal cooking” mode (first cooking rice mode) is accepted with the quick cooking selection switch 3e. Good.

And in embodiment of this invention, when the weight of a to-be-cooked rice is heavier than predetermined weight, "fast-cooking 1" mode (2nd rice cooking mode) and "fast-cooking 2" mode (3rd rice cooking mode) ) Can not be selected, but it can be selected, but it can not be cooked deliciously, so "early cooking 1" mode (second cooking mode) and "early cooking 2" mode (third No. rice cooking mode) may be notified to alert the user.

  As described above, when the weight of the cooked rice is detected by the weight detection means 24 and the cooked rice is heavier than the predetermined weight, the “quick cook 1” mode (second cook rice mode) and the “quick cook” 2 ”mode (3rd rice cooking mode) is not accepted, and only“ normal ”mode (1st rice cooking mode) is accepted and can be selected. This can be avoided, and dissatisfaction with the taste of the user can be reduced.

Embodiment 3 FIG.
(Overall configuration)
FIG. 11 is a schematic diagram of the display contents and operation unit of the display means of the rice cooker according to Embodiment 3 of the present invention, and FIG. 12 is a block diagram showing a schematic configuration of the rice cooker according to Embodiment 3 of the present invention. . The overall configuration of the third embodiment of the present invention includes a total number setting switch 3i in place of the configuration of the first embodiment of the present invention, and includes a notification means 25 in addition to the configuration of the first embodiment of the present invention. The other configurations are the same as those in the first embodiment of the present invention. Therefore, here, different configurations will be described, and description of equivalent configurations will be omitted.

    As shown in FIGS. 11 and 12, the rice cooker according to Embodiment 3 of the present invention includes a total number setting switch 3 i. Further, as shown in FIG. 12, a notification means 25 is provided. The combination number setting switch 3i is for inputting the number of cooked rice accommodated in the inner pot 6.

The notification means 25 includes sounding means such as a speaker (not shown) and a buzzer for amplifying a sound output signal output from a sound IC (not shown) mounted on the control board 9 or the like, for example. In addition, the notification is not only informed by sound or voice, but may be informed by display, for example, may be displayed on the display means 15, or may be notified by sound or voice (notification means 25) and display (display means). It may be used in combination with 15).

(Operation)
Next, operation | movement of the rice cooker which concerns on Embodiment 3 of this invention with FIG. 13 is demonstrated. FIG. 13 is a flowchart of the rice cooker according to Embodiment 3 of the present invention.

  First, the rice and water which are to-be-cooked foods are accommodated in the inner pot 6 (S21), and the kind of rice is selected with the rice seed selection switch 3a of the operation part 3 (S22).

  Next, the total number of cooked rice accommodated in the inner pot 6 is input by the total number setting switch 3i (S23). The total number set and input in S23 is determined in S24, and when the total number of cooked food items is not greater than the predetermined total number, the process proceeds to S25, and “early cooking 1” mode (second rice cooking mode) and “early cooking” The notification means 25 and / or the display means 15 notify that the “2” mode (third rice cooking mode) can be selected.

In addition, the predetermined number refers to the maximum number of cooked dishes, for example, 3 matches that is 60% combined with respect to 5 dishes. It is a state that is 60% or less with respect to the maximum matching number, that is, a total number of 3 or less.

  When you can select “Quick Cook 1” mode (2nd rice cooker mode) or “Quick Cook 2” mode (3rd cook rice mode), use ““ Quick cook 1 ”,“ Quick cook 2 ” I can. ”Is informed by voice or a notification that the buzzer sound different from the buzzer sound at the time of error can be used.

Moreover, when displaying on the display means 15, the same content may be displayed by a character, or the illustration which means that it can be used may be displayed. Furthermore, you may alert | report using a sound and a display together.

  Next, the rice cooking mode is set (S26), the quick cooking selection switch 3e of the operation switch of the operation unit 3 is used to select the “quick cooking 2” mode (third rice cooking mode) (S27), and the cooking of the operation unit 3 is started. The switch 3h is input (S30) and rice cooking is started (S31).

  When the total number of cooked rice items is larger than the predetermined total number in S24, the process proceeds to S27, and the “quick cooking 1” mode (second cooking rice mode) and “quick cooking 2” mode (third cooking rice mode) are selected. The informing means 25 and / or the display means 15 notify that it cannot be done.

In addition, the state more than a predetermined | prescribed number is a state which exceeds 60% with respect to the maximum number of to-be-cooked rices, ie, it is a number exceeding 3 numbers.

  The notification when “Quick Cooking 1” mode (2nd rice cooking mode) and “Quick Cooking 2” mode (3rd rice cooking mode) cannot be selected is “Because there is a lot of rice,“ Quick cooking 1 ”,“ Quick cooking ” Use of “2” is not recommended. Cook rice in "normal" mode. ”Is informed by voice or a notification that the buzzer sound different from the buzzer sound at the time of error cannot be used.

Moreover, when displaying on the display means 15, the same content may be displayed by a character, or the illustration which means that it cannot be used may be displayed. Furthermore, you may alert | report using a sound and a display together.

  Next, in S29, the input of the “quick cooking 1” mode (second cooking mode) and the “quick cooking 2” mode (third cooking mode) is not accepted, and the “normal” mode (first cooking mode) ) Only so that it can be selected.

The “normal” mode (first rice cooking mode) is accepted by the menu switch 3b. However, if the quick cooking selection switch 3e is inputted in the forward order, the “early cooking 2” mode (third rice cooking mode), “ Since it is possible to select “quick cooking 1” mode (second cooking rice mode) and “normal cooking” mode (first cooking rice mode), even if “normal cooking” mode (first cooking rice mode) is accepted with the quick cooking selection switch 3e. Good.

And in embodiment of this invention, when the total number of to-be-cooked objects is more than a predetermined total number, "fast-cooking 1" mode (2nd rice-cooking mode) and "fast-cooking 2" mode (3rd (Cooking mode) is selected so that it cannot be selected, but since it can be selected, it cannot be cooked deliciously, so it can be cooked in the “fast cooking 1” mode (second cooking mode) and “quick cooking 2” mode ( You may make it alert | report to the user by alert | reporting the content which does not recommend (3rd rice cooking mode).

  As described above, the total number of cooked rice is input, and when the total number of cooked rice is greater than the predetermined number, the “cooking 1” mode (second cooking mode) and the “cooking” 2 ”mode (3rd rice cooking mode) is not accepted, and only“ normal ”mode (1st rice cooking mode) is accepted and can be selected. It is possible to reduce dissatisfaction with the taste of the user.

  1 Main body, 1a inner case, 2 lid body, 2a lid top cover, 2b exhaust port, 2c communication port, 2d substrate chamber, 2e seal holding groove, 3 operation section, 3a rice selection switch, 3b menu switch, 3c yoshijun Cooking switch, 3d off / warm switch, 3e quick cooking selection switch, 3f reservation switch, 3g time setting switch, 3h rice cooking start switch, 3i total number setting switch, 4 display window, 5 unlocking button, 5a locking unit, 6 inner hook, 6a flange, 7 inner lid, 7a seal packing, 7b cartridge, 7c lid temperature sensor, 8 hinge part, 8a rotating shaft, 9 control board, 9a control means, 10 induction heating coil, 10a induction heating coil, 10b induction heating coil, 10c induction heating coil, 11 bottom temperature sensor, 12 cooling fan, 13 body Heater, 14 operation display board, 15 display means, 16 holding member, 16a operation button, 16b operation button, 16c operation button, 16d operation button, 16e operation button, 16f operation button, 16g operation button, 16h operation button, 17 display unit Seal, 18 Substrate room seal, 19 Microcomputer, 20 Memory, 21 Inverter circuit, 22 Power supply circuit, 23 Bottom plate, 24 Weight detection means, 25 Notification means, 100 Rice cooker.

Claims (15)

The body,
An inner case provided in the main body and opened upward;
An inner pot for storing cooked rice, which is stored in the inner case so as to be freely inserted and removed from the opening;
A lid provided rotatably on the main body, and covering the upper part of the inner pot;
A heating means provided in the main body for heating the inner pot;
A bottom temperature sensor that is provided at the bottom of the inner case and detects a temperature outside the bottom of the inner pot;
A lid temperature sensor provided on the lid for detecting the temperature inside the inner pot;
An operation unit for performing operation input;
Display means for displaying an input result from the operation unit;
Control means for controlling energization of the heating means based on temperature detection results from either the bottom temperature sensor or the lid temperature sensor, or both,
The control means is capable of selecting a plurality of rice cooking modes having preheating, cooking, boiling maintenance, and unevenness by the operation unit, and at least the plurality of rice cooking modes is a first for performing normal rice cooking. Rice cooking mode, the second rice cooking mode in which the rice cooking time is shorter than the first rice cooking mode, the rice cooking time is shorter than the first rice cooking mode, and the rice cooking time is longer than the second rice cooking mode. With a rice cooking mode
When the said control means performs the said 3rd rice cooking mode, the time of the said preheating process was made longer than the time of the said preheating process of the said 2nd rice cooking mode among each said process. Rice cooker. The body,
An inner case provided in the main body and opened upward;
An inner pot for storing cooked rice, which is stored in the inner case so as to be freely inserted and removed from the opening;
A lid provided rotatably on the main body, and covering the upper part of the inner pot;
A heating means provided in the main body for heating the inner pot;
A bottom temperature sensor that is provided at the bottom of the inner case and detects a temperature outside the bottom of the inner pot;
A lid temperature sensor provided on the lid for detecting the temperature inside the inner pot;
An operation unit for performing operation input;
Display means for displaying an input result from the operation unit;
Control means for controlling energization of the heating means based on temperature detection results from either the bottom temperature sensor or the lid temperature sensor, or both,
The control means is capable of selecting a plurality of rice cooking modes having preheating, cooking, boiling maintenance, and unevenness by the operation unit, and at least the plurality of rice cooking modes is a first for performing normal rice cooking. Rice cooking mode, the second rice cooking mode in which the rice cooking time is shorter than the first rice cooking mode, the rice cooking time is shorter than the first rice cooking mode, and the rice cooking time is longer than the second rice cooking mode. With a rice cooking mode
The control means performs control so as to hold a preheating state at a predetermined holding temperature when executing a preheating step for each of the first rice cooking mode, the second rice cooking mode, and the third rice cooking mode. And
The holding temperature T3 in the preheating step in the third rice cooking mode is higher than the holding temperature T1 in the preheating step in the first rice cooking mode. The body,
An inner case provided in the main body and opened upward;
An inner pot for storing cooked rice, which is stored in the inner case so as to be freely inserted and removed from the opening;
A lid provided rotatably on the main body, and covering the upper part of the inner pot;
A heating means provided in the main body for heating the inner pot;
A bottom temperature sensor that is provided at the bottom of the inner case and detects a temperature outside the bottom of the inner pot;
A lid temperature sensor provided on the lid for detecting the temperature inside the inner pot;
An operation unit for performing operation input;
Display means for displaying an input result from the operation unit;
Control means for controlling energization of the heating means based on temperature detection results from either the bottom temperature sensor or the lid temperature sensor, or both,
The control means is capable of selecting a plurality of rice cooking modes having preheating, cooking, boiling maintenance, and unevenness by the operation unit, and at least the plurality of rice cooking modes is a first for performing normal rice cooking. Rice cooking mode, the second rice cooking mode in which the rice cooking time is shorter than the first rice cooking mode, the rice cooking time is shorter than the first rice cooking mode, and the rice cooking time is longer than the second rice cooking mode. With a rice cooking mode
When the control means executes the third rice cooking mode below a predetermined amount of rice to be cooked with respect to the maximum amount of rice to be cooked, at least the time of the boiling maintaining step among the above steps. The rice cooker characterized by being made longer than the time of the said boiling maintenance process of a said 1st rice cooking mode. The body,
An inner case provided in the main body and opened upward;
An inner pot for storing cooked rice, which is stored in the inner case so as to be freely inserted and removed from the opening;
A lid provided rotatably on the main body, and covering the upper part of the inner pot;
A heating means provided in the main body for heating the inner pot;
A bottom temperature sensor that is provided at the bottom of the inner case and detects a temperature outside the bottom of the inner pot;
A lid temperature sensor provided on the lid for detecting the temperature inside the inner pot;
An operation unit for performing operation input;
Display means for displaying an input result from the operation unit;
Control means for controlling energization of the heating means based on temperature detection results from either the bottom temperature sensor or the lid temperature sensor, or both,
The control means is capable of selecting a plurality of rice cooking modes having preheating, cooking, boiling maintenance, and unevenness by the operation unit, and at least the plurality of rice cooking modes is a first for performing normal rice cooking. Rice cooking mode, the second rice cooking mode in which the rice cooking time is shorter than the first rice cooking mode, the rice cooking time is shorter than the first rice cooking mode, and the rice cooking time is longer than the second rice cooking mode. With a rice cooking mode
The said control means can perform each said process of these several rice cooking modes with a different thermal power, and performs the said 3rd rice cooking mode below predetermined amount of rice to be cooked with respect to the largest amount of rice to be cooked. Sometimes, among the above-mentioned steps, at least the heating power of the boiling maintenance step is made larger than the heating power of the boiling maintenance step of the first rice cooking mode. The body,
An inner case provided in the main body and opened upward;
An inner pot for storing cooked rice, which is stored in the inner case so as to be freely inserted and removed from the opening;
A lid provided rotatably on the main body, and covering the upper part of the inner pot;
A heating means provided in the main body for heating the inner pot;
A bottom temperature sensor that is provided at the bottom of the inner case and detects a temperature outside the bottom of the inner pot;
A lid temperature sensor provided on the lid for detecting the temperature inside the inner pot;
An operation unit for performing operation input;
Display means for displaying an input result from the operation unit;
Control means for controlling energization of the heating means based on temperature detection results from either the bottom temperature sensor or the lid temperature sensor, or both,
The control means is capable of selecting a plurality of rice cooking modes having preheating, cooking, boiling maintenance, and unevenness by the operation unit, and at least the plurality of rice cooking modes is a first for performing normal rice cooking. Rice cooking mode, the second rice cooking mode in which the rice cooking time is shorter than the first rice cooking mode, the rice cooking time is shorter than the first rice cooking mode, and the rice cooking time is longer than the second rice cooking mode. With a rice cooking mode
When said control means performs said 3rd rice cooking mode, time of said uneven process at least among said each process was made longer than the time of said uneven process of said 2nd rice cooking mode. Rice cooker characterized by. The body,
An inner case provided in the main body and opened upward;
An inner pot for storing cooked rice, which is stored in the inner case so as to be freely inserted and removed from the opening;
A lid provided rotatably on the main body, and covering the upper part of the inner pot;
A heating means provided in the main body for heating the inner pot;
A bottom temperature sensor that is provided at the bottom of the inner case and detects a temperature outside the bottom of the inner pot;
A lid temperature sensor provided on the lid for detecting the temperature inside the inner pot;
An operation unit for performing operation input;
Display means for displaying an input result from the operation unit;
Control means for controlling energization of the heating means based on temperature detection results from either the bottom temperature sensor or the lid temperature sensor, or both,
The control means is capable of selecting a plurality of rice cooking modes having preheating, cooking, boiling maintenance, and unevenness by the operation unit, and at least the plurality of rice cooking modes is a first for performing normal rice cooking. Rice cooking mode, the second rice cooking mode in which the rice cooking time is shorter than the first rice cooking mode, the rice cooking time is shorter than the first rice cooking mode, and the rice cooking time is longer than the second rice cooking mode. With a rice cooking mode
When the said control means performs the said 3rd rice cooking mode, the said preheating process and the said unevenness of the said 2nd rice cooking mode are each made into the time of the said preheating process and the said unevenness process among the said each process. A rice cooker characterized in that it is longer than the process time. The body,
An inner case provided in the main body and opened upward;
An inner pot for storing cooked rice, which is stored in the inner case so as to be freely inserted and removed from the opening;
A lid provided rotatably on the main body, and covering the upper part of the inner pot;
A heating means provided in the main body for heating the inner pot;
A bottom temperature sensor that is provided at the bottom of the inner case and detects a temperature outside the bottom of the inner pot;
A lid temperature sensor provided on the lid for detecting the temperature inside the inner pot;
An operation unit for performing operation input;
Display means for displaying an input result from the operation unit;
Control means for controlling energization of the heating means based on temperature detection results from either the bottom temperature sensor or the lid temperature sensor, or both,
The control means is capable of selecting a plurality of rice cooking modes having preheating, cooking, boiling maintenance, and unevenness by the operation unit, and at least the plurality of rice cooking modes is a first for performing normal rice cooking. Rice cooking mode, the second rice cooking mode in which the rice cooking time is shorter than the first rice cooking mode, the rice cooking time is shorter than the first rice cooking mode, and the rice cooking time is longer than the second rice cooking mode. With a rice cooking mode
The said control means can perform each said process of these several rice cooking modes with a different thermal power, and performs the said 3rd rice cooking mode below predetermined amount of rice to be cooked with respect to the largest amount of rice to be cooked. Sometimes, in each of the steps, the time of the boiling maintenance step is made longer than the time of the boiling maintenance step of the first rice cooking mode, and the heating power of the boiling maintenance step is changed to that of the first rice cooking mode. A rice cooker characterized in that it is larger than the heating power of the boiling maintenance step. The body,
An inner case provided in the main body and opened upward;
An inner pot for storing cooked rice, which is stored in the inner case so as to be freely inserted and removed from the opening;
A lid provided rotatably on the main body, and covering the upper part of the inner pot;
A heating means provided in the main body for heating the inner pot;
A bottom temperature sensor that is provided at the bottom of the inner case and detects a temperature outside the bottom of the inner pot;
A lid temperature sensor provided on the lid for detecting the temperature inside the inner pot;
An operation unit for performing operation input;
Display means for displaying an input result from the operation unit;
Control means for controlling energization of the heating means based on temperature detection results from either the bottom temperature sensor or the lid temperature sensor, or both,
The control means includes a plurality of rice cooking modes having preheating, cooking, boiling maintenance, and unevenness steps,
At least the plurality of rice cooking modes include a first rice cooking mode that performs normal rice cooking, a second rice cooking mode that has a shorter cooking time than the first rice cooking mode, and a rice cooking time that is shorter than the first rice cooking mode. When the rice cooking mode is the third rice cooking mode, which is shorter than the second rice cooking mode and the first rice cooking mode, the second rice cooking mode, and the third rice cooking mode are the same rice type. In addition, it can be selectively set by an operation input from the operation unit,
The said control means can perform each said process of said 1st rice cooking mode, said 2nd rice cooking mode, and said 3rd rice cooking mode with a different thermal power, Furthermore, said 1st rice cooking mode and said 2nd rice cooking When performing the preheating step for each mode and the third rice cooking mode, the preheating state is maintained at a predetermined holding temperature, respectively.
When the control means executes the third rice cooking mode, the preheating step and the unevenness time in the respective steps are respectively set as the preheating step and the unevenness step in the second rice cooking mode. And the holding temperature T3 of the preheating step in the third rice cooking mode is set to be higher than the holding temperature T1 of the preheating step in the first rice cooking mode,
Furthermore, when the said control means performs the said 3rd rice cooking mode below predetermined amount of rice to be cooked with respect to the maximum amount of to-be-cooked rice, the time of the said boiling maintenance process in each said process, The rice cooker characterized in that it is longer than the time of the boiling maintenance step in the first rice cooking mode, and the thermal power of the boiling maintenance step is larger than the thermal power of the boiling maintenance step in the first rice cooking mode. .   The first rice cooking mode, the second rice cooking mode, and the third rice cooking mode can be selectively set by an operation input from the operation unit when cooking the same rice type. The rice cooker according to any one of claims 1 to 7, characterized in that: Weight detection means for detecting the weight of the cooked rice that is rice or water contained in the inner pot;
Informing means for informing information on the detection result of the weight detecting means and the operation input result from the operation unit,
The control means notifies that the setting of the second rice cooking mode and the third rice cooking mode is not recommended when the weight of the cooked food detected by the weight detection means is heavier than a predetermined weight. The rice cooker according to any one of claims 1 to 9, wherein:   When the weight of the cooked rice detected by the weight detection means is heavier than a predetermined weight, the control means can accept an operation input for setting the first rice cooking mode by the operation unit, The rice cooker according to claim 10, wherein an operation input for setting the second rice cooking mode and the third rice cooking mode cannot be received. Weight detection means for detecting the weight of the cooked rice that is rice or water contained in the inner pot;
Informing means for informing information on the detection result of the weight detecting means and the operation input result from the operation unit,
When the weight of the cooked rice detected by the weight detection means is heavier than a predetermined weight, the control means can accept an operation input for setting the first rice cooking mode by the operation unit, Notifying the operation input for setting the second rice cooking mode and the third rice cooking mode and notifying that only the operation input for setting the first rice cooking mode is acceptable. The rice cooker of Claim 10 characterized by the above-mentioned. A total number setting switch for inputting a total number of rice accommodated in the inner pot provided in the operation unit;
Informing means for informing information by an operation input result from the operation unit,
The control means informs that setting of the second rice cooking mode and the third rice cooking mode is not recommended when the total number input by the total number setting switch is greater than a predetermined total number. The rice cooker according to any one of claims 1 to 9, wherein:   The control means can accept an operation input for setting the first rice cooking mode by the operation unit when the total number input by the total number setting switch is greater than a predetermined total number. The rice cooker according to claim 13, wherein an operation input for setting the second rice cooking mode and the third rice cooking mode is not accepted. A total number setting switch for inputting a total number of rice accommodated in the inner pot provided in the operation unit;
Informing means for informing information by an operation input result from the operation unit,
The control means can accept an operation input for setting the first rice cooking mode by the operation unit when the total number input by the total number setting switch is greater than a predetermined total number. And not accepting the operation input for setting the second rice cooking mode and the third rice cooking mode, and notifying that only the operation input for setting the first rice cooking mode is acceptable. The rice cooker of Claim 13 characterized by the above-mentioned.

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