JP2009213547A - Rice cooker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rice cooker capable of saving energy further according to the preference of a user. <P>SOLUTION: The rice cooker includes: a pot stored inside a rice cooker body; a freely openable and closable lid covering the upper opening of the pot; a pot bottom heating device for heating the bottom part of the pot; a pot temperature detection part for detecting the temperature of the pot; a heating control part for controlling the pot heating operation of the pot bottom heating device; a rice cooking and heat insulation control part for controlling the heating control part and performing a rice cooking and heat insulating process; a mode input part for inputting one of rice cooking and heat insulating modes including a standard mode and an energy saving mode; a setting change information input part capable of inputting setting change information; and a mode setting change part for changing the setting of the energy saving mode inputted in the mode input part on the basis of the setting change information. When the energy saving mode and the setting change information are inputted, the rice cooking and heat insulation control part performs the rice cooking and heat insulating process on the basis of the energy saving mode changed by the mode setting change part and the detection temperature of the pot temperature detection part. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a rice cooker that can save energy.

  Conventionally, this type of rice cooker has been known to have various structures, such as those disclosed in Patent Documents 1 and 2.

  In Patent Document 1, the user can select at least two cooked rice warming modes of a standard cooked rice warming mode and an energy-saving cooked rice warming mode. A rice cooker is disclosed that cooks rice by automatically changing time, heating temperature, and the like.

According to Patent Literature 2, rice that has been cooked by automatically selecting a corresponding heat-retaining mode from a plurality of heat-retaining modes according to rice-cooking information such as rice seed information and the degree of freshness of rice input before the start of rice cooking A rice cooker that performs heat insulation is disclosed.
Japanese Patent Laid-Open No. 2007-125357 Japanese Patent Laid-Open No. 2007-222289

  However, in the rice cookers of Patent Documents 1 and 2, since the purpose is to save energy while reducing the user's trouble and suppressing the deterioration of the taste, which rice cooker or The rice cooker itself is configured to automatically determine whether to change the setting of the heat retention mode. For this reason, from the viewpoint of suppressing the taste deterioration, the setting of rice cooking or the heat-retaining mode that is automatically changed by the rice cooker itself is limited, and as a result, there is a limit to energy saving.

  In recent years, further energy saving has been strongly demanded from the viewpoint of consideration for the global environment, and the interest of rice cooker users is also increasing. For this reason, if the further energy saving is realizable, the number of people thinking that a taste may fall somewhat is increasing.

  On the other hand, the taste for the taste of rice differs depending on the rice consumer (user of the rice cooker). Some people like hard rice and others like soft rice. For this reason, even if the rice cooked or kept warm in the energy-saving rice cooker or the heat-retaining mode automatically determined by the rice cookers of Patent Documents 1 and 2 is optimal, for example, for those who like hard rice Some people think that harder rice can be used if further energy savings can be realized.

  Accordingly, an object of the present invention is to provide a rice cooker which can solve the above-described problems and can realize further energy saving according to the user's preference.

In order to achieve the above object, the present invention is configured as follows.
According to the first aspect of the present invention, the pan stored inside the rice cooker body;
An openable / closable lid covering the upper opening of the pan;
A pan bottom heating device for heating the bottom of the pan;
A pan temperature detector for detecting the temperature of the pan;
A heating control unit for controlling the pot heating operation of the pot bottom heating device;
A rice cooking heat control unit that controls the heating control unit to perform a rice cooking process and a heat holding process, and
Any one cooked rice warming mode selected from at least two cooked rice warming modes including a standard cooked rice warming mode and an energy-saving cooked rice warming mode that consumes less total power when cooking rice than the standard cooked rice warming mode. Cooking rice warming mode input section where the mode is input,
Energy-saving rice cooking warming mode setting change information input section that can input energy-saving rice warming mode setting change information,
Based on the setting change information input in the setting change information input unit, an energy saving rice warming mode setting changing unit that changes the setting of the energy saving rice warming mode input in the mode input unit;
With
The rice cooking temperature control unit has the energy-saving rice cooking mode changed by the mode setting change unit when the mode input unit inputs the energy-saving rice cooking temperature keeping mode and the setting change information input unit inputs the setting change information. Provided is a rice cooker that performs the rice cooking step and the heat retaining step based on a heat retaining mode and a detected temperature of the pan temperature detecting unit.

  According to the 2nd aspect of this invention, the said rice cooking heat control part is based on the detected temperature of the said standard rice warming mode and the said pan temperature detection part, when the said standard rice warming mode is input by the said mode input part. Performing the rice cooking step and the heat retaining step, and when the energy saving rice warming mode is input in the mode input unit and the setting change information is not input in the setting change information input unit, the energy saving rice warming mode and the pan temperature detection The rice cooker as described in a 1st aspect which performs the said rice cooking process and a heat retention process based on the detection temperature of a part is provided.

  According to the 3rd aspect of this invention, the said setting change information has the said total energy consumption less than the time of setting the said energy-saving rice heat retention mode in the said energy-saving rice heat retention mode performing the said rice cooking process and a heat retention process. The rice cooker as described in the 1st or 2nd aspect which is the information which shows changing is provided.

  According to the 4th aspect of this invention, Furthermore, the rice cooker as described in any one of the 1st-3rd aspect provided with the display part which displays the total power consumption in the said energy-saving rice cooking heat retention mode. Here, the display method of the display unit is not limited to visual display, and includes auditory display such as voice. The same applies to the description of the display unit.

According to the fifth aspect of the present invention, the ratio of the total power consumption in the changed energy-saving rice warming mode to the total power consumption in the standard rice warming mode or the energy-saving rice warming mode is further calculated. An arithmetic unit;
The rice cooker as described in any one of the 1st-3rd aspect provided with the display part which displays the said ratio calculated by the said calculating part.

  According to the 6th aspect of this invention, the said display part provides the rice cooker of a 5th aspect which displays the said ratio calculated by the said calculating part with a percentage or a level meter.

According to the seventh aspect of the present invention, the calculation unit further calculates a total power consumption per unit period set in advance based on the ratio,
The said display part provides the rice cooker of a 5th aspect which displays the total power consumption concerning the said unit period calculated by the said calculating part.

According to the eighth aspect of the present invention, it further includes a ratio data storage unit that stores the ratio data calculated by the calculation unit a plurality of times.
The calculation unit calculates an average value of the ratios for the plurality of times stored in the ratio data storage unit,
The said display part provides the rice cooker as described in a 5th aspect which displays the said average value calculated by the said calculating part.

According to the ninth aspect of the present invention, the rice cooking process includes a pre-cooking process, a cooking process, a boiling maintenance process, and a spotting process.
The cooked rice heat control unit performs the cooked rice process and the heat retaining process in the changed energy-saving cooked rice heat retaining mode in the pre-cooking process, the cooked process, the boiling maintenance process, the unevenness process, and the heat retaining process. Sometimes, when there is a process that consumes less power than when performing the rice cooking process and the heat retaining process in the standard rice heat retaining mode or the energy-saving rice heat retaining mode, the rice heat retaining operation with less power consumption in the process. The rice cooker as described in any one of the 1st-3rd aspect which displays the information which shows that is performed on a display part is provided.

  According to the tenth aspect of the present invention, when the standard rice warming mode is input at the mode input unit, the cooked rice warming control unit is more than the total cooked power consumption than the standard rice warming mode or the energy-saving rice warming mode. The rice cooker as described in any one of the 1st-3rd aspect which displays the warning information which shows not performing the said rice cooking process and a heat retention process in rice cooking heat retention mode with little quantity on a display part is provided.

According to the eleventh aspect of the present invention, the rice cooking process includes a pre-cooking process, a cooking process, a boiling maintenance process, and a spotting process,
When the rice cooking temperature control unit performs the rice cooking process and the heat retaining process in the changed energy-saving rice cooking temperature maintaining mode, the pre-cooking process, the cooking process, the boiling maintaining process, the unevenness process, and When there exists a process which is not performed in the heat retention process, the rice cooker according to any one of the first to third aspects is provided, in which information indicating the process which is not performed is displayed on the display unit.

  According to the twelfth aspect of the present invention, when the rice cooking temperature control unit is input with the energy-saving rice temperature maintaining mode at the mode input unit and the setting change information is input at the setting change information input unit, The rice cooker as described in any one of the 1st-3rd aspect which displays the information which shows the procedure at the time of performing the said energy-saving rice cooking heat retention mode changed by the setting change part on a display part is provided.

According to the thirteenth aspect of the present invention, the setting change information includes the total power consumption in the changed energy-saving rice warming mode with respect to the total power consumption in the standard rice warming mode or the energy-saving rice warming mode. Contains information about the percentage of
In association with information indicating the ratio, a rice cooking heat mode storage unit in which a plurality of rice heat retention modes are stored in advance each time the ratio is different,
A rice cooking heat mode extraction unit for extracting the plurality of rice heat retention modes corresponding to the information indicating the ratio input to the setting change information input unit from the rice cooking heat mode storage unit,
A display unit for displaying the plurality of cooked rice heat insulation modes extracted by the cooked rice heat insulation mode extraction unit;
A selection input unit to which any one cooked rice heat insulation mode selected from the plurality of cooked rice heat insulation modes extracted by the mode extraction unit;
The rice cooker according to any one of the first to third aspects is further provided.

  According to the rice cooker of the present invention, based on the cooked rice warming mode setting change information input unit capable of inputting cooked rice warming mode setting change information and the setting change information, the energy saving cooked rice warming mode input by the cooked rice warmed mode input unit Since it has an energy-saving cooked rice warming mode setting change unit that changes the setting, the user can input the setting change information according to his / her preference at the setting change information input unit, thereby saving the energy-saving cooked rice warming mode. You can change the settings. As a result, further energy saving can be realized.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, exemplary embodiments of the invention will be described with reference to the drawings. In addition, this invention is not limited by this embodiment.

<< First Embodiment >>
The rice cooker in 1st Embodiment of this invention is demonstrated below. FIG. 1 is a cross-sectional view of a rice cooker according to the first embodiment of the present invention, and FIG. 2 is a block diagram showing a configuration related to the control. In the first embodiment of the present invention, an electric IH heating rice cooker will be described as an example.

  In FIG.1 and FIG.2, the rice cooker of 1st Embodiment is arrange | positioned so as to oppose the outer peripheral surface of the pan 2, the pan 2 which puts rice and water in the main body 1 so that attachment or detachment is possible, and the pan 2 A heating unit 3 for heating the pot, a lid 4 attached to the main body 1 so as to be openable and closable so as to cover the upper opening of the pot 2, and a pot temperature for detecting the temperature of the pot 2 by circumscribing the bottom center of the pot 2 Based on the detection temperature Ta of the pan bottom temperature sensor 5 which is an example of the detection unit and the pan bottom temperature sensor 5, the heating control unit 71 which controls the pan heating operation of the heating unit 3 is controlled. The rice cooker heat control part 6 which heats the pot 2 and heats the rice and water in the pot 2 and performs the rice cooking process and the heat retention process which will be described later is provided.

  The main body 1 has a substantially cylindrical shape with an open top and forms a rice cooker main body. A ring-shaped upper frame 11 is fitted and attached around the upper opening of the main body 1. The upper frame 11 fixes the upper end part of the coil base 12 formed in the bottomed cylindrical shape, and the pot base part is formed with the coil base 12. On the outer peripheral surface of the coil base 12, a ring-shaped bottom inner coil 31, bottom outer coil 32, and side coil 33 are installed so as to be opposed to the outer peripheral surface of the pan 2 and inductively heat the pan 2. Yes. The bottom inner coil 31 and the bottom outer coil 32 constitute an example of a pot bottom heating device for heating the bottom of the pot 2. The bottom inner coil 31 is disposed so as to face the substantially central bottom 2a of the pan 2, the bottom outer coil 32 is disposed so as to face the side bottom 2b of the pan 2, and the side coil 33 is connected to the side 2c of the pan 2. It arrange | positions so that it may oppose. The heating unit 3 includes a bottom inner coil 31, a bottom outer coil 32, a side coil 33, and a lid coil 34 described later.

  In the space formed by the coil base 12 and the inner surface of the main body 1, a high-frequency current is applied to the bottom inner coil 31, the bottom outer coil 32, the side coil 33, and a lid coil 34, which will be described later, by the control from the rice cooking heat control unit 6. A heating control unit 71 is installed for energizing and heating the pot 2 by induction. A heat sink 73 for cooling the heat generating component 72 installed on the heating control unit 71 is installed below the heating control unit 71. A cooling fan motor 74 for cooling the heat sink 73 is provided below the heat sink 73. The surface of the cooling fan motor 74 facing the coil base 12 is inclined so as to follow the shape of the coil base 12.

  The lid 4 is detachably attached to the outer lid portion 41 formed of synthetic resin, the inner lid portion 42 fitted and attached to the inner side of the outer lid portion 41, and the lower surface of the inner lid portion 42. And a heat generating plate 43 constituting the lower surface of the lid 4. On the upper surface of the inner lid portion 42, a ring-shaped lid coil 34 for inductively heating the heat generating plate 43 is installed. The lid 4 is pivotally supported by a hinge member 13 integrally formed with a part of the upper frame 11 of the main body 1 so that the hinge shaft 4a provided at a part of the inner lid part 42 can be rotated. It is attached so that the upper opening can be opened and closed.

  A ring-shaped pot packing 44 is attached to the lower part of the outer periphery of the heat generating plate 43. The pot packing 44 is disposed so as to close the gap between the pot 2 and the lid 4 so that steam generated in the pot 2 during cooking and heat insulation does not flow into the internal space of the main body 1. A lid temperature sensor 45 for detecting the temperature of the heat generating plate 43 is pressed against a part of the upper surface of the heat generating plate 43. Further, a steam passage hole 46 for discharging the steam in the pan 2 to the outside of the rice cooker is provided at the center of the heat generating plate 43.

  In the center of the lid 4, the steam hole 47 penetrates in the thickness direction of the lid 4 so that the steam discharged from the pot 2 through the steam passage hole 46 can be discharged to the outside of the main body 1. Is provided. A substantially cylindrical steam cylinder 48 is fitted into the steam hole 47 from the outside of the rice cooker.

  The pan bottom temperature sensor 5 is provided on the coil base 12 and is urged by a sensor spring 51 for supporting the pan 2, so that the pan bottom temperature sensor 5 can be circumscribed on the substantially central bottom portion 2 a of the pan 2. This pan bottom temperature sensor 5 is installed so that the cooked rice warming control unit 6 can control the cooking object (rice and water) in the pan 2 to an optimum temperature state by detecting the pan temperature during cooking and warming. ing.

  Inside the lid 4 and above the lid temperature sensor 45, a rice cooking heat control unit 6, an operation board 61, an information input unit 62, and a display unit 63 are installed. The outer lid 41 is provided with a display window 41a that allows the display unit 63 to be visually recognized from the outside of the rice cooker, and an operation panel 41b that can press various input buttons of the information input unit 62 by pressing from the outside of the rice cooker. It has been.

  As shown in FIG. 3, the information input unit 62 is provided with mode input buttons 62a and 62b which are examples of the rice cooking and warming mode input unit. The mode input button includes a standard mode button 62a and an energy saving mode button 62b. The standard mode button 62a and the energy saving mode button 62b can select the total power consumption when cooking and keeping a certain amount of rice before cooking and keeping warm. When the standard mode button 62a is pressed, a standard rice warming mode (hereinafter referred to as the standard mode) for cooking and warming with the same total power consumption as that of a rice cooker generally used conventionally is input, and rice warming control is performed. Is transmitted to the unit 6. When the energy saving mode button 62b is pressed, a total energy consumption smaller than that in the standard mode, that is, an energy saving rice warming mode (hereinafter referred to as an energy saving mode) in which rice is cooked and kept warm with a weak heating power is input. The setting of this energy-saving rice heat-retaining mode can be changed by pressing setting change information input buttons 62c to 62e described later. The cooked rice warming control unit 6 controls the heating control unit 71 based on any one of the standard mode, the energy saving mode, or the changed energy saving mode and the detected temperature Ta of the pan bottom temperature sensor 5 or the lid temperature sensor 45. The amount of heating (energization rate, heating temperature, heating time, or heating output) of the heating unit 3 (inner bottom coil 31, outer bottom coil 32, side coil 33, and lid coil 34) is controlled. Moreover, the rice cooking heat control part 6 controls the required time of the various processes in a rice cooking process by the time-measurement part 64 (refer FIG. 2) provided separately.

  Moreover, the information input part 62 is provided with the setting change information input buttons 62c-62e which are examples of the rice cooking heat retention mode setting change information input part, as shown in FIG. The setting change information input button includes an UP button 62c, a DOWN button 62d, and an enter button 62e. When the energy saving mode button 62b is pressed, information such as that shown in FIG. Using the UP button 62c, the DOWN button 62d, and the enter button 62e, the user can input energy saving rice warming mode setting change information (hereinafter referred to as setting change information) for changing the setting of the energy saving mode. Here, the setting change information is information for individually changing the process of reducing the power consumption compared to the energy saving mode in the various processes of the pre-cooking process, the cooking process, the boiling maintenance process, the unevenness process, and the heat retention process. It is. For example, in FIG. 3, any one of the various steps 63b can be selected by pressing the UP button 62c or the DOWN button 62d. Further, by pressing the determination button 62e in a state where the one process is selected, it is possible to change the setting of the energy saving mode so that the amount of power consumption is smaller than that in the energy saving mode. When the setting of the energy saving mode is changed, the lamp 63c is turned on so that the changed process can be confirmed. In FIG. 3, a black circle indicates a state where the lamp 63c is turned off, and a white circle indicates a state where the lamp 63c is turned on.

  The setting change information input by the setting change information input buttons 62c to 62e is input to a mode setting changing unit 65 (see FIG. 2), which is an example of an energy saving cooked rice warming mode setting changing unit. The mode setting changing unit 65 changes the setting of the energy-saving rice cooking and warming mode based on the setting change information and outputs the changed energy to the rice cooking and warming control unit 6. The rice cooking heat control unit 6 inputs the changed energy saving mode to the calculation unit 66 (see FIG. 2). The computing unit 66 calculates the ratio of the total power consumption in the changed energy saving mode to the total power consumption in the energy saving mode. The rice cooking heat control unit 6 displays the ratio calculated by the calculation unit 66 on the display unit 63. An example of displaying the ratio on the display unit 63 is an energy saving level 63a shown in FIG. Here, the energy saving level 63a is displayed as a percentage. In the above description, the rice cooking temperature control unit 6 displays the ratio calculated by the calculation unit 66 on the display unit 63. However, the rice cooking temperature control unit 6 displays the total power consumption in the changed energy saving mode. You may make it display on the display part 63. FIG. This can also encourage the user to save energy.

  The information input unit 62 further includes a cancel / off button 62f and a start button 62g. When the cancel / cut button 62f is pressed, it instructs to cancel each operation, etc., and when pressed for a long time (for example, 3 seconds), it instructs the rice cooking heat control unit 6 to turn off the main power. When the start button 62g is pressed, it instructs the cooked rice warming control unit 6 to start an operation such as cooking rice, and when pressed for a long time (for example, 3 seconds), it instructs the cooked rice warming control unit 6 to turn on the main power supply. The rice cooker of 1st Embodiment is comprised as mentioned above.

  Next, the sequence of the rice cooking process and the heat retention process in each rice heat retention mode in which the energy saving level 63a for the standard mode, the energy saving mode, and the energy saving mode is 10% to 60% will be described.

  First, an example of the sequence of the rice cooking process and the heat retaining process in the standard mode will be described with reference to FIG. Here, the rice cooking process mainly includes a pre-cooking process A in which rice absorbs water, a cooking process B in which cooked food (rice and water) is boiled, and the boiling state is maintained and water is converted into rice. It consists of a boiling maintenance process C that is absorbed or evaporated and steamed rice that is cooked to finish the pan uniformly. In addition, what was shown as the continuous line in FIG. 4 represents transition of the detection temperature Ta of the pan bottom temperature sensor 5 in various processes.

  The pre-cooking process A is a process that allows the rice to be sufficiently gelatinized to the center of the rice in the subsequent steps by immersing the rice in water at a temperature lower than the temperature at which the rice is gelatinized and preliminarily absorbing the rice. It is. Pre-cooking step A is also a step of decomposing starch with amylase contained in rice to produce glucose, thereby producing sweetness of rice. For this reason, in the pre-cooking process A, the cooked rice warming control unit 6 controls the heating so that the detected temperature Ta of the pan bottom temperature sensor 5 becomes, for example, about 50 ° C. until the time of the time measuring unit 64 becomes, for example, about 20 minutes. The unit 71 is controlled to control the heating amount of the heating unit 3 (that is, the energization rate, the heating temperature, the heating time, or the heating output).

  When the time measured by the time measuring unit 64 reaches about 20 minutes, the pre-cooking process A is terminated and the process proceeds to the cooking process B. In the cooking process B, as shown in FIG. 4, until the detected temperature Ta of the pan bottom temperature sensor 5 reaches the boiling point of water (usually near 100 ° C.), the cooked rice warming control unit 6 controls the heating control unit 71, The heating amount of the heating unit 3 is controlled. At this time, the time measuring unit 64 can measure the amount of time to be cooked, that is, the amount of cooked rice, by measuring the time required to boil after heating with a constant heating power. In this step, instead of the pan bottom temperature sensor 5, the rice cooking temperature control unit 6 controls the heating control unit 71 until the temperature detected by the lid temperature sensor 45 reaches a predetermined temperature (usually about 80 ° C.). Also good.

  When the detected temperature Ta of the pot bottom temperature sensor 5 reaches the boiling point of water, 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 rice starch and raises the gelatinization degree to about 50% to 60%. In the boiling maintenance step C, while the pot 2 has water, the rice cooking temperature control unit 6 controls the heating control unit 71 so that the rice and water in the pot 2 maintain the boiling state, and the heating unit 3 The amount of heating is controlled. By this control, when the water in the pot 2 is absorbed by the rice or evaporated, the temperature of the pot 2 rises. As shown in FIG. 4, when the detected temperature Ta of the pan bottom temperature sensor 5 reaches or exceeds the boiling point of water (for example, 130 ° C.), the boiling maintenance process C is terminated, and the unevenness process D is performed. In addition, the time of the boiling maintenance process C changes with rice cooking amounts.

  The unevenness process D is a process in which starch of rice is gelatinized to increase the degree of gelatinization to nearly 100%. In the unevenness process D, in order to prevent the temperature of the rice from lowering while preventing the pan bottom from being burnt, and to promote gelatinization and uniformize the rice in the pan 2, according to the time measured by the time measuring unit 64 , And repeatedly repeat the pause and additional cooking heating multiple times. Here, as an example, when the operation for 2 minutes of rest, 3 minutes of additional cooking heating, 2 minutes of suspension, 3 minutes of additional cooking heating, and 3 minutes of suspension is completed, the unevenness process D is terminated and the process proceeds to the heat retention process E. It is said.

  The heat retaining step E is a step of maintaining the temperature of the pan 2 at, for example, about 70 ° C. in order to protect the finished rice (rice) from spoilage and provide warm rice. In the heat retaining step E, the rice cooking heat retaining control unit 6 controls the heating control unit 71 to control the heating amount of the heating unit 3 so that the detected temperature Ta of the pan bottom temperature sensor 5 is maintained at about 70 ° C. In the standard mode, this heat retention step E is set to be performed for 12 hours, which is considered to be a time for almost all users to consume the rice in the pan 2.

  Next, an example of a sequence of various processes in the energy saving mode will be described with reference to FIG.

  In the first embodiment of the present invention, the difference between the energy saving mode and the standard mode is that the time of the heat retaining process is limited to 4 hours. In other words, in the energy saving mode, the heat insulation process E is automatically terminated in 4 hours after the heat insulation process E is started. The reason for limiting the heat-retaining process to 4 hours is based on the average usage condition that the user consumes the rice in the pan 2 within about 4 hours.

  When various processes are performed in the standard mode, even if the user consumes rice in the pan 2 in 3 hours, for example, the heat retention process E is performed for 12 hours unless the user instructs the end of the heat retention process E. Will be. On the other hand, when various processes are performed in the energy saving mode, the heat retention process E is automatically terminated in 4 hours, so that the power consumption for 8 hours can be reduced.

  Next, with reference to FIG. 6, an example of a sequence of various processes in the cooked rice warming mode in which the energy saving level 63a with respect to the energy saving mode is 10% will be described.

  In 1st Embodiment of this invention, the point from which the rice cooking heat retention mode whose energy saving level 63a is 10% differs from an energy saving mode is the point which limited the time of the heat retention process E to 2 hours and 50 minutes. The power consumption of various processes in the rice cooking process is, for example, a pre-cooking process of about 45 Wh (watt hours), a cooking process of about 60 Wh, a boiling maintenance process of about 60 Wh, and a spotting process of about 35 Wh. In the heat retaining step E, for example, about 13 Wh (watt hour) is consumed in the first hour, and after that, about 24 Wh is consumed every hour. For this reason, the power consumption when the heat retention process E is 4 hours is about 85 Wh (= 13 + 24 × 3). Therefore, the total power consumption when the rice cooking process and the heat retaining process are performed in the energy saving mode is about 285 Wh (= 45 + 60 + 60 + 35 + 85). In order to reduce the total power consumption by 10% compared to the energy saving mode, it is sufficient to reduce the power consumption by about 28 Wh. As described above, since the heat retention process E consumes about 24 Wh per hour, the heat retention process E can be shortened by 1 hour and 10 minutes in order to reduce the power consumption of about 28 Wh. That is, energy saving of about 10% can be realized by setting the heat retaining step E to 2 hours and 50 minutes. In the heat retaining step E, the amount of power consumption for the first hour is small because the temperature of the rice immediately after the start of the heat retaining is higher than about 70 ° C., and thus there is little need for heating.

  Next, with reference to FIG. 7, an example of a sequence of various steps in the rice cooking warming mode in which the energy saving level 63a for the energy saving mode is 20% will be described.

  In the first embodiment of the present invention, the difference from the cooked rice warming mode in which the cooked rice warmed mode in which the energy saving level 63a is 20% is 10% is that the time of the warming process E is limited to 1 hour and 40 minutes. As described above, the total power consumption in the energy saving mode is about 285 Wh. Therefore, in order to reduce the total power consumption by 20% compared to the energy saving mode, it is only necessary to reduce the power consumption by about 56 Wh. . As described above, the heat retention process E consumes about 24 Wh of power per hour. Therefore, in order to reduce the power consumption of about 56 Wh, the heat insulation process E may be shortened by 2 hours and 20 minutes. That is, energy saving of 20% can be realized by setting the heat retaining step E to 1 hour and 40 minutes.

  Next, with reference to FIG. 8, an example of a sequence of various steps in the rice cooking warming mode in which the energy saving level 63a for the energy saving mode is 30% will be described.

In 1st Embodiment of this invention, the point which is different from the rice cooking heat insulation mode in which the rice cooking heat insulation mode whose energy saving level 63a is 30% is 20% is a point which did not perform the heat retention process E. FIG. As described above, since the total power consumption in the energy saving mode is about 285 Wh, to reduce the total power consumption by 30% compared to the energy saving mode, it is only necessary to reduce the power consumption by about 85 Wh. . As described above, since the amount of power consumed for the heat insulation process E is about 85 Wh, the energy saving level 30% can be achieved by not performing the heat insulation process E.
In addition, by adjusting the time of the heat retention process E as described above, it is possible to reduce the total power consumption within a range of 0 to 30%.

  Next, with reference to FIG. 9, an example of a sequence of various steps in the rice cooking warming mode in which the energy saving level 63a with respect to the energy saving mode is 40% will be described.

  In the first embodiment of the present invention, the difference from the cooked rice warming mode in which the cooked rice warmed mode in which the energy saving level 63a is 40% is 30% is that the power consumption in the pre-cooking process A is reduced. is there. The pre-cooking step A is a step of causing the rice to absorb water in advance as described above. In the pre-cooking step A in the energy saving mode, the rice is absorbed by continuing heating by the heating unit 3 for about 20 minutes. On the other hand, in the pre-cooking process A shown in FIG. 9, the pan 2 is initially raised to a temperature exceeding 60 ° C., which is higher than usual, and the rice in the pan 2 is absorbed by the remaining heat. At this time, the water absorption rate is increased by setting the pre-cooking step A to a longer time than usual, for example, about 30 minutes. As a result, it is possible to eliminate the need to continue heating by the heating unit 3 by securing the time until the water temperature in the pan 2 gradually falls as the water absorption time of the rice, resulting in a reduction in power consumption. Is possible. By performing such pre-cooking step A, the total power consumption can be reduced by about 10%. Therefore, a total energy saving of 40% can be realized by 10% by the pre-cooking process A and 30% by the heat retaining process E.

  In addition, when reducing power consumption in the pre-cooking process A, since the time concerning the pre-cooking process A becomes about 10 minutes long, it is preferable to display on the display part 63 that total rice cooking time becomes long.

  Next, with reference to FIG. 10, an example of a sequence of various steps in the rice cooking warming mode in which the energy saving level 63a for the energy saving mode is 50% will be described.

  In the first embodiment of the present invention, the difference from the cooked rice warming mode in which the cooked rice warmed mode in which the energy saving level 63a is 50% is 40% is to reduce the power consumption in the cooking process B and the boiling maintaining process C. This is the point. As described above, the cooking process B and the boiling maintaining process C are processes in which the water in the pan 2 is boiled and the rice is gelatinized by absorbing water or evaporating. For this reason, here, while reducing the quantity of the water put into the pan 2 previously, the heating temperature by the heating unit 3 is made low. By reducing the amount of water put in the pot 2 in advance, it is possible to reduce the power consumption necessary for evaporating the water. On the other hand, by lowering the heating temperature by the heating unit 3, it is possible to secure the boiling time of water necessary for the rice to gelatinize. By performing such cooking process B and boiling maintenance process C, it is possible to reduce the total power consumption by about 10%. Therefore, 10% can be realized by the pre-cooking process A, 10% can be achieved by the cooking process B and the boiling maintenance process C, and 30% can be realized by the heat retaining process E, for a total of 50%.

  In addition, when reducing power consumption in the cooking process B and the boiling maintenance process C, it is necessary to have the user reduce the amount of water in the pan 2. For this reason, it is preferable to display information that prompts the user to reduce the amount of water (for example, character information “please reduce the amount of water by one memory”) on the display unit 63. In addition, reducing the amount of water in the pan 2 may be an element of deteriorating taste such as uneven cooking or reduced (harder) moisture content of cooked rice. For this reason, when reducing power consumption in the cooking process B and the boiling maintenance process C, it is preferable to display on the display unit 63 that the taste level is lowered by one rank.

  Next, with reference to FIG. 11, an example of a sequence of various steps in the rice cooking warming mode in which the energy saving level 63a for the energy saving mode is 60% will be described.

  In 1st Embodiment of this invention, the point from which the rice cooking heat retention mode whose energy saving level 63a is 60% differs from the rice cooking heat retention mode which is 50% is a point which reduced the power consumption in the uneven process C. is there. Here, as an example, the operation is performed for 4 minutes for rest, 1 minute for additional cooking, and 8 minutes for rest. By performing such additional cooking step D, the total power consumption can be reduced by about 10%. Therefore, a total energy saving of 50% can be realized, which is 10% by the pre-cooking process A, 10% by the cooking process B and the boiling maintenance process C, 10% by the unevenness D, and 30% by the heat retaining process E.

  In addition, in the cooking process D, reducing the amount of heating by the heating unit 3 cannot evaporate excess moisture, which may cause a decrease in taste such as uneven cooking and the surface of rice becoming sticky with moisture. is there. For this reason, when power consumption is reduced in the cooking process D, the taste level is lowered by one rank (when power consumption is reduced in the cooking process B and the boiling maintenance process C, the rank is lowered by two). It is preferable to inform the user to do so.

  In the above description, the heat-saving process E, the pre-cooking process A, the cooking process B, the boiling maintenance process C, and the unevenness process D are described to increase the energy saving level 63a. However, the present invention is not limited to this. The order of the steps for raising the energy saving level 63a may be changed as appropriate. For example, while the heat insulation process E is performed for 4 hours according to the energy saving mode, in the pre-cooking process A and the unevenness process D, the total power consumption is reduced by 10% from the energy saving mode, respectively, and the total power consumption is 20% in total. You may make it reduce.

  Next, an example of a user's input procedure and operation of each unit when changing the energy-saving cooked rice warming mode will be described with reference to FIGS. 2, 3, 12, and 13.

  First, when the user presses the energy saving mode button 62b, the screen shown in FIG. In the energy saving mode, as described above, the heat retention process E is performed only for up to 4 hours, so that the rice cooking heat control unit 6 displays the character information on the display unit 63 as “the heat retention is performed only for 4 hours”. When the start button 62g is pressed in this state, the rice cooking process is started in the energy saving mode. When the start button 62g is pressed after the standard mode button 62a is pressed, the rice cooking process is started in the standard mode.

  When the user wants to change the setting of the energy saving mode, the user selects the step 63b to be changed by pressing the UP button 62c or the DOWN button 62d, and changes the setting of the energy saving mode by pressing the decision button 62c in the selected state. be able to.

  For example, when there is no need for the heat retention process E while reducing the power consumption of the pre-cooking process A, the pre-cooking process is performed as setting change information using the setting change information input buttons 62c to 62e as shown in FIG. The lamp 63c corresponding to A is turned on and the lamp 63c corresponding to the absence of the heat retaining process E is turned off. The setting change information input by the setting change information input buttons 62c to 62e is input to the mode setting change unit 65. The mode setting changing unit 65 changes the setting of the energy saving mode based on the setting change information, and outputs the changed setting to the cooked rice warming control unit 6. The cooked rice warming control unit 6 outputs the changed energy saving mode to the calculation unit 66. The computing unit 66 calculates the ratio of the total power consumption in the changed energy saving mode to the total power consumption in the energy saving mode. The rice cooking heat control unit 6 displays the ratio calculated by the calculation unit 66 on the display unit 63 as a percentage as the energy saving level 63a as shown in FIG. At this time, for example, it is preferable to display character information such as “the cooking time is changed, so it takes 10 minutes longer to cook”. Thereby, the user can know whether or not the rice cooker has correctly recognized the input setting change information, and can know the precautions when starting the rice cooking process in the changed energy saving mode. Note that the user may be notified by voice instead of being displayed in characters on the display unit 63 or instead of being displayed in characters.

  In addition, although the said ratio calculated by the calculating part 66 was displayed on the display part 63 by the percentage above, you may make it display with a level meter as shown in FIG. In addition, in FIG. 13, when reducing power consumption in all the processes of the pre-cooking process A-the heat retention process E, an example of the screen displayed on the display part 63 is shown.

  According to the rice cooker of 1st Embodiment of this invention, based on the setting change information input buttons 62c-62e which can input setting change information, and the setting change information, it is the energy-saving mode input by mode input part 62a, 62b. Since the mode setting changing unit 65 for changing the setting is provided, the user changes the setting of the energy saving mode by inputting the setting change information according to his / her preference with the setting change information buttons 62c to 62e. can do. As a result, further energy saving can be realized.

  Moreover, according to the rice cooker of 1st Embodiment of this invention, it has the calculating part 66 which calculates the ratio of the total power consumption in the said energy-saving mode with respect to the total power consumption in energy-saving mode, The said calculation Since the ratio calculated by the unit 66 is displayed on the display unit 63 as a percentage or a level meter, the user can further save energy from the energy saving mode according to the setting change information input by the user. You can see at a glance whether you can plan.

  At this time, the calculation unit 66 calculates the total power consumption per unit period (for example, one month) set in advance based on the ratio, and the display unit 63 displays the total power consumption. It is preferable to do. Accordingly, the user can predict the total power consumption per unit period set in advance, and can raise awareness of energy saving.

  The storage unit (not shown) stores the ratio data calculated by the calculation unit 66 a plurality of times, and the calculation unit 66 stores the average value of the ratios stored in the storage unit. If the calculation is performed and the average value is displayed on the display unit 63, the user can use the average value as a guide when inputting the setting change information.

  Moreover, according to the rice cooker of 1st Embodiment of this invention, in the energy-saving mode changed by the mode setting change part 65, when there exists a process in which power consumption is less than an energy-saving mode, the lamp | ramp 63c corresponding to the said process Is turned on and character information indicating the process is displayed. Thereby, it can be confirmed in which process the power consumption is reduced. On the other hand, in the energy saving mode changed by the mode setting changing unit 65, for a process in which the amount of power consumption does not decrease compared to the energy saving mode, the user confirms the process because the lamp 63c corresponding to the process is turned off. can do. Further, for example, warning information such as “power consumption is not reduced in the pre-cooking process” may be displayed on the display unit 63. Thereby, for example, when the user forgets to input the setting change information, it is possible to call attention. Further, the warning information is displayed, so that the user's awareness of energy saving can be increased.

  Further, according to the rice cooker of the first embodiment of the present invention, when the heat retaining process E is not performed, the character information “Do not perform the heat retaining process (see FIG. 12)” is displayed on the display unit 63. ing. Thereby, the user can note that the heat retention process E is not performed. In addition, although it displayed on the display part 63 here when the heat retention process E is not performed, this invention is not limited to this. When the energy saving mode setting is changed based on the setting change information, when there is a pre-cooking process A, a cooking process B, a boiling maintenance process C, an unevenness process D, and a heat retaining process E that are not executed at all, What is necessary is just to display the process which is not performed. For example, the pre-cooking process A may not be performed when the user has sufficiently absorbed water in advance by the start of the rice cooking process. For this reason, energy saving can be achieved, without performing the pre-cooking process A at all. Further, it is possible to save energy without executing the unevenness process D at all. Therefore, when there is a process that is not executed at all, the process that is not executed may be displayed.

  In addition, as described above, when a work that the user needs to perform occurs due to the change in the energy saving mode, information indicating the procedure of the work (for example, “please reduce the amount of water by one memory”). Etc.) is preferably displayed on the display unit 63. Thereby, a user's burden can be reduced.

<< Second Embodiment >>
The rice cooker concerning 2nd Embodiment of this invention is demonstrated. The rice cooker according to the second embodiment of the present invention is different from the rice cooker according to the first embodiment in that the energy saving level 63a can be changed as setting change information. For this reason, the rice cooker concerning 2nd Embodiment of this invention is replaced with the calculating part 66, and is provided with the rice cooking heat insulation mode extraction part 67 and the rice cooking heat insulation mode memory | storage part 68 as shown in FIG. Since the other points are the same as those in the first embodiment, they will be described below without redundant description.

  In the second embodiment, information for changing the energy saving level 63a is input as setting change information using the setting change information input buttons 62c to 62e. For example, when the UP button 62c is pressed, the energy saving level 63a changes to 10%, 20%, 30%, and so on, and when the DOWN button 62d is pressed, changes to 60%, 50%, 40%, and so on. To do. After the desired energy saving level 63a is selected by the UP button 62c or the DOWN button 62d, when the decision button 62e is pressed, the rice cooking and warming mode extraction unit 67 selects a plurality of rice cooking and warming modes corresponding to the selected energy saving level 63a. Extracted from the cooked rice warming mode storage unit 68. As shown in FIG. 15, the rice cooking heat storage mode storage unit 68 stores a plurality of rice cooking heat storage modes capable of realizing the energy saving level 63a for each energy saving level 63a in association with each energy saving level 63a.

  For example, when the setting change information input by the setting change information input buttons 62c to 62e has an energy saving level of 10%, the rice cooking warm mode extraction unit 67 has a plurality of ( In FIG. 15, 4) rice cooking heat insulation mode is extracted. The plurality of cooked rice warming modes extracted by the cooked rice warming mode extracting unit 67 are displayed on the display unit 63 by the cooked rice warming control unit 6 as shown in FIG. After this, the user selects the desired rice warming mode using the UP button 62c or the DOWN button 62d and presses the decision button 62e, so that the mode setting change unit 65 selects the energy saving mode setting. Be changed. In addition, in this 2nd Embodiment, the setting change information input buttons 62c-62e are any one rice cooking heat mode selected from the said some rice cooking heat mode extracted by the rice cooking heat mode extraction part 67. It has a function as a selection input unit to be input.

  According to the second embodiment of the present invention, first, the energy saving level 63a is determined, and then the cooked rice warming mode corresponding to the determined energy saving level 63a is selected, so which process is controlled by the user. Thus, the rice cooking process can be started in the rice cooking heat insulation mode at the desired energy saving level 63a in a short time without knowing how much power consumption can be reduced.

  In addition, this invention is not limited to the said embodiment, It can implement with another various aspect. For example, in the above description, the calculation unit 66 calculates the ratio of the total power consumption in the changed energy saving mode to the total power consumption in the energy saving mode, but the present invention is not limited to this. For example, the calculation unit 66 may calculate a ratio of the total power consumption in the changed energy saving mode to the total power consumption in the standard mode. In this case, the display unit 63 may display the ratio calculated by the calculation unit 66 using, for example, a percentage or a level meter.

  In the above description, the setting change information is information for individually changing the process of reducing the power consumption in the various processes as compared with the energy saving mode, but the present invention is not limited to this. The setting change information may be information indicating that the setting of the energy saving mode is to reduce the total power consumption compared to when the rice cooking and the heat retaining process are performed in the energy saving mode. For example, in some processes, the power consumption may be increased compared to the energy saving mode, while in other processes, the power consumption may be decreased compared to the energy saving mode, so that the total power consumption may be reduced as a whole. .

Moreover, in the rice cooker of 1st Embodiment of this invention, the heating unit 3 is comprised with the bottom inner coil 31, the bottom outer coil 32, the side coil 33, and the cover coil 34, and the to-be-cooked object in the pan 2 is comprised. Although it comprised so that it might heat from the lid 4 side which covers the pan bottom side, the pan side surface, and the upper opening part of the pan 2, this invention is not limited to this. The heating unit 3 should just be provided with the pan bottom heating apparatus which heats at least the pan bottom side. That is, the rice cooker according to the first embodiment of the present invention only needs to include the bottom inner coil 31 or the bottom outer coil 32.
Moreover, in the rice cooker of 1st Embodiment of this invention, although all the heating units 3 were comprised with the coil, it is not restricted to a coil, You may comprise by the combination of a heater, a heater, and a coil.

In addition, it can be made to show each effect which each embodiment has by combining suitably any embodiment of each said embodiment.
Moreover, it cannot be overemphasized that said each embodiment can be implemented also in the rice cooker of the other system controlled by a microcomputer.
In each embodiment, the detection temperature, the heating time, and the like described with specific numerical values are merely examples of implementation, and the numerical values can be changed as appropriate according to the situation.

  Since the rice cooker concerning this invention can implement | achieve further energy saving according to a user's liking, it is useful as a rice cooker by which energy saving is calculated | required.

It is sectional drawing of the rice cooker concerning 1st Embodiment of this invention. It is a block diagram which shows the control relevant structure of the rice cooker concerning 1st Embodiment of this invention. It is a top view of the operation panel of the rice cooker concerning 1st Embodiment of this invention. It is a figure which shows the sequence of the various processes in the standard mode of the rice cooker concerning 1st Embodiment of this invention. It is a figure which shows the sequence of the various processes in the energy-saving mode of the rice cooker concerning 1st Embodiment of this invention. It is a figure which shows the sequence of the various processes in the rice cooking heat retention mode of the energy-saving level 10% of the rice cooker concerning 1st Embodiment of this invention. It is a figure which shows the sequence of the various processes in the rice cooking heat retention mode of the energy-saving level 20% of the rice cooker concerning 1st Embodiment of this invention. It is a figure which shows the sequence of the various processes in the rice cooking heat retention mode of the energy-saving level 30% of the rice cooker concerning 1st Embodiment of this invention. It is a figure which shows the sequence of the various processes in the rice cooking heat retention mode of the energy-saving level 40% of the rice cooker concerning 1st Embodiment of this invention. It is a figure which shows the sequence of the various processes in the rice cooking heat retention mode of the energy-saving level 50% of the rice cooker concerning 1st Embodiment of this invention. It is a figure which shows the sequence of the various processes in the rice cooking heat retention mode of the energy-saving level 60% of the rice cooker concerning 1st Embodiment of this invention. It is a top view of the operation panel when the energy-saving level of the rice cooker concerning 1st Embodiment of this invention is 40%. It is a top view of the operation panel which showed the energy-saving level of the rice cooker concerning 1st Embodiment of this invention with the level meter. It is a block diagram which shows the control relevant structure of the rice cooker concerning 2nd Embodiment of this invention. It is a figure which shows roughly the information memorize | stored in the rice cooking heat retention mode memory | storage part. It is a top view of the operation panel of the rice cooker concerning 2nd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main body 2 Pan 3 Heating unit 4 Lid 5 Pan bottom temperature sensor 6 Rice cooking temperature control part 11 Upper frame 12 Coil base 13 Hinge member 31 Bottom inner coil 32 Bottom outer coil 33 Side coil 34 Lid coil 41 Outer lid part 42 Inner lid part 43 Heating plate 44 Pan packing 45 Lid temperature sensor 46 Steam passage hole 47 Steam hole 48 Steam cylinder 49 Reed switch 51 Sensor spring 61 Operation board 62 Information input part 62a-62b Rice cooking heat retention mode input button 62c-62e Setting change information input button 62f Cancel And off button 62g Start button 63 Display unit 64 Timekeeping unit 65 Mode setting change unit 66 Calculation unit 67 Rice cooking warm mode extraction unit 68 Rice cooking warm mode storage unit 71 Heating control unit

Claims (13)

A pot stored inside the rice cooker body,
An openable / closable lid covering the upper opening of the pan;
A pan bottom heating device for heating the bottom of the pan;
A pan temperature detector for detecting the temperature of the pan;
A heating control unit for controlling the pot heating operation of the pot bottom heating device;
A rice cooking heat control unit that controls the heating control unit to perform a rice cooking process and a heat holding process, and
Any one cooked rice warming mode selected from at least two cooked rice warming modes including a standard cooked rice warming mode and an energy-saving cooked rice warming mode that consumes less total power when cooking rice than the standard cooked rice warming mode. Cooking rice warming mode input section where the mode is input,
Energy-saving rice cooking warming mode setting change information input section that can input energy-saving rice warming mode setting change information,
Based on the setting change information input in the setting change information input unit, an energy saving rice warming mode setting changing unit that changes the setting of the energy saving rice warming mode input in the mode input unit;
With
The rice cooking temperature control unit has the energy-saving rice cooking mode changed by the mode setting change unit when the mode input unit inputs the energy-saving rice cooking temperature keeping mode and the setting change information input unit inputs the setting change information. The rice cooker which performs the said rice cooking process and a heat retention process based on the heat retention mode and the detection temperature of the said pan temperature detection part.   When the standard rice warming mode is input in the mode input unit, the rice cooking warming control unit performs the rice cooking process and the warming process based on the standard rice warming mode and the detected temperature of the pan temperature detection unit, When the energy saving rice warming mode is input in the mode input unit and the setting change information is not input to the setting change information input unit, the rice cooking is performed based on the energy saving rice warming mode and the temperature detected by the pan temperature detection unit. The rice cooker of Claim 1 which performs a process and a heat retention process.   The setting change information is information indicating that the setting of the energy-saving cooked rice warming mode is changed to reduce the total power consumption less than when the rice cooking process and the heat-keeping process are performed in the energy-saving cooked rice warming mode. Claim | item 1 or 2 rice cooker.   Furthermore, the rice cooker as described in any one of Claims 1-3 provided with the display part which displays the total power consumption in the said energy-saving rice cooking heat retention mode changed. Further, a calculation unit that calculates a ratio of the total power consumption in the changed energy-saving rice warming mode to the total power consumption in the standard rice warming mode or the energy-saving rice warming mode;
A display unit for displaying the ratio calculated by the calculation unit;
The rice cooker of any one of Claims 1-3 provided with.   The said display part is a rice cooker of Claim 5 which displays the said ratio calculated by the said calculating part with a percentage or a level meter. The calculation unit further calculates a total power consumption per preset unit period based on the ratio,
The said display part is a rice cooker of Claim 5 which displays the total power consumption concerning the said unit period calculated by the said calculating part. Furthermore, a ratio data storage unit that stores the ratio data calculated by the calculation unit a plurality of times,
The calculation unit calculates an average value of the ratios for the plurality of times stored in the ratio data storage unit,
The said display part is a rice cooker of Claim 5 which displays the said average value calculated by the said calculating part. The rice cooking process includes a pre-cooking process, a cooking process, a boiling maintenance process, and an unevenness process,
The cooked rice heat control unit performs the cooked rice process and the heat retaining process in the changed energy-saving cooked rice heat retaining mode in the pre-cooking process, the cooked process, the boiling maintenance process, the unevenness process, and the heat retaining process. Sometimes, when there is a process that consumes less power than when performing the rice cooking process and the heat retaining process in the standard rice heat retaining mode or the energy-saving rice heat retaining mode, the rice heat retaining operation with less power consumption in the process. The rice cooker as described in any one of Claims 1-3 which displays the information which shows that is performed on a display part.   The rice cooking temperature control unit is configured to perform the rice cooking process in the rice cooking temperature maintaining mode with less total power consumption than the standard rice temperature maintaining mode or the energy saving rice temperature maintaining mode when the standard rice temperature maintaining mode is input in the mode input unit. And the warning information which shows not performing a heat retention process is displayed on a display part, The rice cooker as described in any one of Claims 1-3. The rice cooking process includes a pre-cooking process, a cooking process, a boiling maintenance process, and an unevenness process,
When the rice cooking temperature control unit performs the rice cooking process and the heat retaining process in the changed energy-saving rice cooking temperature maintaining mode, the pre-cooking process, the cooking process, the boiling maintaining process, the unevenness process, and The rice cooker as described in any one of Claims 1-3 which displays the information which shows the process which is not performed on a display part when there is a process which is not performed in the said heat retention process.   When the energy saving rice warming mode is input by the mode input unit and the setting change information is input by the setting change information input unit, the rice cooking heat control unit is changed by the mode setting changing unit. The rice cooker as described in any one of Claims 1-3 which displays the information which shows the procedure at the time of performing heat retention mode on a display part. The setting change information includes information indicating a ratio of the total power consumption in the changed energy-saving rice warming mode to the total power consumption in the standard rice warming mode or the energy-saving rice warming mode,
In association with information indicating the ratio, a rice cooking heat mode storage unit in which a plurality of rice heat retention modes are stored in advance each time the ratio is different,
A rice cooking heat mode extraction unit for extracting the plurality of rice heat retention modes corresponding to the information indicating the ratio input to the setting change information input unit from the rice cooking heat mode storage unit,
A display unit for displaying the plurality of cooked rice heat insulation modes extracted by the cooked rice heat insulation mode extraction unit;
A selection input unit to which any one cooked rice heat insulation mode selected from the plurality of cooked rice heat insulation modes extracted by the mode extraction unit;
The rice cooker according to any one of claims 1 to 3, further comprising:

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