JP2022090424A - rice cooker - Google Patents

Abstract

To provide a rice cooker capable of cooking rice by heating similar to rice cooking in a kitchen stove.SOLUTION: A rice cooker includes: a pan housing materials to be cooked; a bottom surface heating body 11 as heating means heating the pan; rice cooking control means 41 which changes a heating amount of the bottom surface heating body 11 on the basis of a first pattern read from storage means 35 and cooks the materials to be cooked as respective steps of rice cooking progress; and heating amount fluctuating means 44 which changes a heating amount of the bottom surface heating body 11 as time passes in a second pattern different from a first pattern when operation of the bottom surface heating body 11 is controlled so that the rice cooking control means 41 heats the pan.SELECTED DRAWING: Figure 2

Description

The present invention relates to a rice cooker that cooks rice by changing the heating amount of the heating means while heating the pot.

When rice is cooked by burning a firewood flame in a kamado, the flame of the firewood flame fluctuates and heats the bottom and sides of the pot containing the rice to be cooked while slightly changing the heating power.

As a technique for approaching such ancient kamado cooking, for example, as in Patent Documents 1 and 2, three independent induction heating (IH) coils are arranged from the bottom to the side surface of the pot, and each coil is sequentially arranged. Independent coils with different height positions are arranged on the bottom and side surfaces of the pot, as in the case of those that perform heating by passing electricity while rotating, and as in Patent Documents 3, 4 and 5, and each coil is alternately arranged. A coil for induction heating is arranged from the bottom to the side surface of the pot, and the heating amount of the coil is changed stepwise with the passage of time. A coil for induction heating is arranged from the bottom to the side surface of the pot, and the heating amount of the coil is continuously changed with the passage of time to perform heating. Each thing is known.

Japanese Unexamined Patent Publication No. 2019-162250 Japanese Unexamined Patent Publication No. 2019-180533 Japanese Unexamined Patent Publication No. 9-248242 Japanese Unexamined Patent Publication No. 2011-206142 Japanese Unexamined Patent Publication No. 5-337042 Japanese Unexamined Patent Publication No. 2013-247792 Japanese Unexamined Patent Publication No. 2008-220470 Japanese Unexamined Patent Publication No. 11-214139 Japanese Unexamined Patent Publication No. 2020-4540

The above-mentioned conventional technique promotes water convection in the pot during rice cooking, and the rice in the pot is heated in the presence of water evenly, thereby uniformly gelatinizing the rice in the whole pot. It is presumed that this is a technique for cooking rice, which focuses on the important points for beautiful cooking found in traditional kamado cooking. However, in Kamado cooking, the firewood fire, which is the heating source, is located away from the pot, and indirect heating is performed via the air layer, and the amount of heat to the pot changes so as to fluctuate. In the IH type rice cooker, since the pot generates heat, there is no space between the heating source and the pot, and the heating form itself is different.

Other than the IH type, there is a hot plate heater type that heats the hot plate that contacts the bottom of the pot, a radiant heater type that heats the pot with a heater that has a gap between the pot and the pot, and water between the pot and the outer pot. Indirect rice cookers that put rice in and cook rice are also known, but none of them has been able to realize a rice cooker that changes the amount of heat to a pot, such as a kamado cooker.

Therefore, an object of the present invention is to provide a rice cooker capable of cooking rice by heating similar to that of cooking a kamado.

In the rice cooker of the present invention, in order to achieve the above object, the pot for accommodating the cooked rice, the heating means for heating the pot, and the heating amount of the heating means are changed in the first pattern as the process progresses. A second pattern different from the first pattern when the rice cooking control means for cooking rice to the cooked rice and the heating means are controlled so that the rice cooking control means heats the pot. It is characterized by providing a heating amount variable means for changing the heating amount of the heating means over time.

According to the rice cooker of the present invention, rice can be cooked by heating similar to that of cooking a kamado.

It is a schematic explanatory drawing of the rice cooker which shows one Embodiment of this invention. It is a block diagram which shows the electric composition of the rice cooker. Similarly, it is a graph which shows the time-dependent change of the temperature of the bottom part of a pot, the temperature of the lower part of a lid body, and the heating amount of a bottom surface heater. The graphs show (A) the change over time in the amount of heating to the pot by the rice cooking control means, and (B) the change over time in the amount of heat to the pot by the means for fluctuating the amount of heating. In the same, it is a graph which shows the time-dependent change of the heating amount to a pan by the heating amount fluctuation means. It is a graph which shows the time-dependent change of the temperature of each part in the boiling heating process. It is a graph which shows the time-dependent change of the temperature of each part in the boiling heating process. It is a graph which shows the time-dependent change of the temperature of each part in the boiling heating process. It is a graph showing the relationship between the amount of heating in high heat and time. It is a graph showing the relationship between the amount of heating on medium heat and time. Similarly, it is a graph showing the relationship between the amount of heating on low heat and time.

Hereinafter, a preferred embodiment of the rice cooker in the present invention will be described with reference to the accompanying drawings. In addition, a common reference numeral shall be attached to the common part in all these drawings.

First, to explain the overall configuration of the rice cooker in the present embodiment based on FIG. 1, 1 is a main body having an open upper surface, and 2 is a lid body that can be opened and closed to cover the upper surface of the opening of the main body 1. And the lid 2 constitute the appearance of the rice cooker. On the front surface of the main body 1, a display operation unit 5 in which a display unit 3 such as an LED or a liquid crystal display, which will be described later, and an operation unit 4 such as an operation key or a touch panel are collectively arranged is arranged. The display operation unit 5 may be arranged on the lid 2 instead of the main body 1.

Inside the main body 1, a bottomed cylindrical pot 7 for accommodating rice and water as the rice to be cooked A is detachably provided. The pot 7 can be taken in and out from the upper surface opening of the main body 1 when the lid 2 is opened with respect to the main body 1. When the pot 7 is put in the main body 1 and the lid 2 is closed, the lid 2 is closed. By closing the opening upper surface of the pot 7 with the inner lid 8 attached to the lower surface portion of the pot 7, the pot inner space 9 surrounded by the inner side surface of the pot 7, the upper surface of the rice to be cooked A, and the lower surface of the inner lid 8 is formed. It is formed inside the main body 1 and thus the pot 7. Although not shown, the pot 7 is mainly made of aluminum having good thermal conductivity, and a heating element made of a magnetic member such as ferritic stainless steel is joined from the lower side surface to the bottom surface of the outer surface of the main material.

Inside the main body 1 and outside the pot 7, a bottom heating body 11 by a heating coil and a side heating body 12 by a cord heater are respectively as heating means for heating the pot 7 to cook rice to be cooked A. Arranged. The bottom surface heating body 11 serving as the main heating means for the pot 7 is arranged so as to face the bottom surface from the lower side surface where the heating element of the pot 7 is provided. As a result, when the bottom heating body 11 is in a so-called energized state in which a high-frequency current is applied, the heating element of the pot 7 generates heat due to the alternating magnetic field from the bottom heating body 11, and the temperature of the pot 7 rises to raise the rice to be cooked A. It is configured to heat. Further, the side heating body 12 serving as an auxiliary heating means for the pot 7 is arranged facing the upper side of the side surface of the pot 7, and when the side heating body 12 is energized, the radiant heat from the side heating body 12 causes the pot 7 to become energized. It is mainly configured to heat the upper part of the side surface. The side heating body 12 may be formed of a heating coil in the same manner as the bottom surface heating body 11, and may be added to the bottom surface portion from the lower side surface portion of the pot 7 to heat the upper side surface portion of the pot 7 by electromagnetic induction. Further, the pot 7 may be heated by a heating method other than electromagnetic induction.

In addition to the inside of the main body 1, a thermistor-type pot temperature sensor 15 that abuts on the outer surface of the bottom of the pot 7 is arranged, and the pot temperature sensor 15 serving as a pot temperature detecting means detects the bottom temperature of the pot 7. Therefore, the heating temperature of the bottom of the pot 7 by the bottom heating body 11 is mainly controlled.

Then, during rice cooking and heat retention, the pot 7 is heated by a heating means, but during heat retention, the bottom heating body 11 is heated and adjusted according to the detection temperature of the pot temperature sensor 15 in contact with the outer bottom surface of the pot 7, and the pot is heated. Keep 7 at a constant temperature. After cooking the rice, the side heating body 12 serving as a heat generating means is heated until the temperature of the rice in the pot 7 drops to the heat retention temperature (about 100 ° C → about 73 ° C) and when the heat retention is stable (about 73 ° C). The coldness due to the intrusion of outside air from the gap between the main body 1 and the lid 2 is suppressed, and the upper part of the side surface of the pot 7 is mainly heated. Further, when the rice is kept warm, the rice in the pot 7 is reheated. The pot 7 is heated even during the hot reheating period, and the moisture generated by the heating is prevented from condensing on the upper inner surface of the pot 7. It has become.

The lid 2 that opens and closes the upper opening of the pot 7 includes a thermista-type lid temperature sensor 16 that detects the temperature of the inner lid 8 and thus the space 9 inside the pot, and a pressure sensor 17 that detects the internal pressure of the pot 7. A lid heating body 18 such as a cord heater is provided. The lid temperature sensor 16 and the lid heating body 18 mainly control the temperature of the inner lid 8 by the lid heating means 23. When the inner lid 8 is attached to the lid body 2, the lid temperature sensor 16 is placed on the upper surface of the inner lid 8. The lid heating body 18 is arranged so as to face each other on the upper surface of the inner lid 8. The inner lid 8 may be heated by electromagnetic induction by forming the lid heating body 18 with a heating coil and the inner lid 8 with a magnetic member.

A pressure adjusting valve 20 including a ball-shaped valve body 19 is arranged at substantially the center of the inner lid 8 constituting the lower surface portion of the lid body 2. The pressure adjusting valve 20 is arranged in the middle of the steam passage space that communicates between the space inside the pot 9 and the lid 2 and the outside of the rice cooker (outside the machine), and the valve body 19 is inside the lid 2. A movable mechanism (not shown) such as a solenoid is provided to advance the pressure control valve 20 or retract the pressure control valve 20 from the pressure control valve 20. As a result, when the valve body 19 advances to the pressure adjusting valve 20 and closes the steam passage space, the pressure in the pot inner space 9 rises due to the heating of the pot 7, and the pot inner space 9 is pushed up until the valve body is pushed up. When the pressure can be increased above the atmospheric pressure and the valve body 19 retracts from the pressure adjusting valve 20 to open the steam passage space, the space inside the pot 9 can be maintained at the atmospheric pressure regardless of the heating to the pot 7. .. The pressure sensor 17 is provided inside the lid 2 facing the pressure adjusting valve 20, but may be disposed in another place as long as the pressure in the pot inner space 9 can be detected.

FIG. 2 shows the electrical configuration of the rice cooker in this embodiment. In the figure, 31 is a control unit that is incorporated inside the main body 1 and the lid 2 and includes a microcomputer and drive elements of each part. The operation unit 4, the pan temperature sensor 15, the lid temperature sensor 16, and the pressure sensor 17 are electrically connected to the input port of the control unit 31, respectively. Further, at the output port of the control unit 31, a display unit 3, a first heating drive unit 32 connected to the bottom surface heating body 11, a second heating drive unit 33 connected to the side surface heating body 12, and a lid heating body 18 are provided. The third heating drive units 34 connected to the above are electrically connected to each other. The control unit 31 incorporates a storage means 35 such as a memory capable of reading and writing for storing various information and data.

The control unit 31 receives an operation signal from the operation unit 4 and each detection signal from the pot temperature sensor 15, the lid temperature sensor 16, and the pressure sensor 17, and is based on the time measurement from the built-in time measurement means (not shown). A function to output a display control signal to the display unit 3 at a predetermined timing and to output a heating control signal to the first heating drive unit 32, the second heating drive unit 33, and the third heating drive unit 34, respectively. Have. Such a function is realized by reading a program pre-recorded in the storage means 35 as a storage medium by the control unit 31, but in particular, in the present embodiment, with rice which is the cooked rice A in the pot 7 at the time of cooking rice. It is equipped with a program that mainly functions the control unit 31 as a rice cooking control means 41 that cooks and heats water to cook rice and a heat retention control means 42 that maintains the rice in the pot 7 at a predetermined heat retention temperature at the time of heat retention. ..

The first heating drive unit 32 includes a power supply circuit 36, an inverter 37, and an IH drive circuit 38 as main components. The power supply circuit 36 corresponds to a rectifying smoothing circuit that converts a commercial power supply voltage of, for example, AC 100V supplied to the main body 1 into a DC voltage, and the DC voltage from the power supply circuit 36 is applied to the inverter 37 as an input voltage. .. Although none of the inverters 37 is shown, the inverter 37 is provided with a resonance capacitor connected in parallel with the heating coil serving as the bottom heating body 11 to form a resonance circuit, a switch element such as an IGBT connected in series with the resonance circuit, and the like. It is a well-known voltage type resonant inverter. The IH drive circuit 38 receives the first heating control signal from the control unit 31 and sends a pulse drive signal sufficient for turning on / off the switch element of the inverter 37 to the gate of the switch element. .. As a result, when a pulse drive signal is given from the IH drive circuit 38 to the gate of the switch element, the emitter and collector of the switch element repeatedly turn on and off, and the power supply voltage from the power supply circuit 36 becomes the resonance circuit of the inverter 37. It is configured to be applied intermittently and a high-frequency current is supplied to the bottom surface heater 11. At this time, by changing the cycle of the pulse drive signal and the ratio of the on-time to one cycle (on-time ratio), the output power (output) from the inverter 37 and the heating amount from the bottom heating body 11 to the pan 7 are increased or decreased. Can be made to.

The second heating drive unit 33 receives the second heating control signal from the control unit 31 and supplies the commercial power supply voltage applied to the power supply circuit 36 to the cord heater serving as the side heating body 12. Similarly, the third heating drive unit 34 receives the third heating control signal from the control unit 31 and supplies the commercial power supply voltage applied to the power supply circuit 36 to the cord heater serving as the lid heating body 18. In addition, the control unit 31 also has a function of transmitting another control signal for turning the solenoid on / off to the drive unit of the solenoid that moves the valve body 19, but in the present embodiment, it is particularly effective. Since it is less relevant, further description and illustration will be omitted.

The rice cooking control means 41 receives an instruction to start cooking rice by operating the operation unit 4, and sets the temperature of the cooked rice A and the cooked rice that promotes water absorption in the cooked rice A put into the pot 7. After raising to boiling in a short time, the boiling state of the cooked rice A is continued to make it a dry-up state without water, and the temperature is high enough not to burn the cooked rice A in the dry-up state. In order to carry out each process of cooking rice into rice in order, the rice to be cooked A contained in the pot 7 is cooked and heated at a desired pressure. In the present embodiment, for all the rice cooking courses that can be cooked and heated by the rice cooker, the display unit 3, the bottom heating body 11, and the side surface are accompanied by the progress of each process of cooking rice from the above-mentioned single-cooking to uneven cooking. How to operate the heating body 12 and the lid heating body 18 so that the amount of heating from the bottom heating body 11, the side heating body 12 and the lid heating body 18 to the cooked rice A in the pot 7 is how. The first pattern of whether to change to rice cooker is stored in the storage means 35 in advance, and the rice cooker is started after the user selects any rice cooker course desired by the user from the plurality of rice cooker courses by operating the operation unit 4. Is instructed, the rice cooking control means 41 reads out the first pattern corresponding to the selected rice cooking course from the storage means 35, and in addition to the display unit 3, the bottom heating body 11 and the side heating body 12 and the like. By appropriately controlling the lid heating body 18, the display unit 3 displays the rice while cooking the rice to be cooked A placed in the pot 7.

It should be noted that in the present embodiment, the control unit 31 includes the heating amount fluctuation means 44 which is the heating amount variable means. The heating amount fluctuation means 44 operates the bottom heating body 11, the side heating body 12, and the lid heating body 18 so as to heat the pot 7 according to the first pattern corresponding to the rice cooking course selected by the rice cooking control means 41. A second pattern different from the first pattern is generated as needed, and based on the second pattern, the bottom heating body 11, the side heating body 12, and the lid heating body 18 to the pot 7 are generated. The amount of heating to the cooked rice A is changed with the passage of time. The details of the heating amount fluctuation means 44 will be described later.

The heat retention control means 42 controls the rice in the pot 7 to keep the rice at a predetermined heat retention temperature according to the first pattern corresponding to the selected rice cooking course described above, and controls the rice cooking regardless of the selected rice cooking course. When the cooking and heating of the cooked rice A by the means 41 is completed, the heat retention control means 42 automatically keeps the heat. Further, the heat insulating control means 42 operates the bottom heating body 11 so that the rice in the pot 7 temporarily becomes higher than the heat insulating temperature when reheating is instructed by the operation to the operation unit 4 during the heat insulating. It has the function of heat insulation and reheating to control. Further, even when the operation unit 4 is instructed to start heat insulation in the off state immediately after the commercial power is turned on to the main body 1, the heat insulation control means 42 keeps the cooked rice A put in the pot 7 warm. You can do it.

Next, the characteristics of the operation of the rice cooker having the above configuration, particularly related to the heating amount fluctuation means 44, will be described in detail. From now on, for convenience of explanation, the bottom surface heating body 11 by the heating coil is used as a typical heating means, and only the heating amount of the bottom surface heating body 11 will be described.

The rice cooker of the present embodiment has a pot 7 for accommodating the rice to be cooked A, a bottom heating body 11 as a heating means for heating the pot 7, and a second rice cooker read from the storage means 35 as each process of cooking rice progresses. The rice cooking control means 41 that cooks rice to the cooked rice A by changing the heating amount of the bottom heating body 11 based on one pattern, and the bottom heating body 11 so that the rice cooking control means 41 heats the pot 7. A second pattern different from the first pattern when controlling the operation is provided with a heating amount fluctuation means 44 as a heating amount variable means for changing the heating amount of the bottom surface heating body 11 over time. There is.

FIG. 3 shows the pot bottom temperature Tn corresponding to the temperature of the bottom of the pot 7 detected by the pot temperature sensor 15 and the temperature of the lower surface of the lid 2 detected by the lid temperature sensor 16 in the rice cooker of the present embodiment. The changes over time of the lid temperature Tf corresponding to the above and the heating amount S of the bottom surface heating body 11 are shown in graphs.

In the figure, when the rice cooking control means 41 receives an operation signal from the operation unit 4 and starts cooking rice, the rice cooking control means 41 "boils" to promote water absorption of the rice put in the pot 7 and the water in the pot 7. "Boiling heating" that brings the rice to a boil and then continues boiling, and when the rice absorbs water in the pot 7 and the water runs out and the pot bottom temperature Tn rises above the boiling temperature (100 ° C), cooking is detected. Then, for a predetermined time, for example, 15 minutes, each process of "murashi" that keeps the inside of the pot 7 at a high temperature proceeds in order, and the heat retention control means 42 sets the heat retention control means 42 after the "murashi" for a predetermined time is completed. , Bottom heating based on the first pattern, which is the reference control pattern read from the storage means 35, so as to execute the "heat retention" process of keeping the rice cooked in the pot 7 at a predetermined temperature of, for example, 73 ° C. The amount of heating S from the body 11 to the pot 7 is changed with the passage of time.

In a series of rice cooking processes including "hot cooking" to "heat retention", the rice cooking control means 41 and the heat retention control means 42 adjust the heating amount S of the bottom heating body 11 and the intermittent heating that is the timing of power interruption. The configuration of the control for cooking the rice to be cooked A in the pot 7 is known to be the same as that of the conventional rice cooker.

On the other hand, the heating amount fluctuation means 44, which is the main object of the invention in the present embodiment, is "Hajimechorochoro, Nakapappa, if you blow it all the way, pull the fire, burn a handful of straw, and cry the baby." In response to the change in the amount of heating to the pot 7 over time by the rice cooking control means 41 according to "Do not remove the lid", the amount of heating to the pot 7 by induction heating is 100 ms (1 second to 10 seconds cycle). The number is increased or decreased every 1 s (0.1 second) to generate a second pattern in which the output of the inverter 37 corresponding to the heating amount of the bottom heating body 11 changes to, for example, about 200 W as a whole. Then, a heating configuration assuming fluctuation of the firewood flame is added so that the heating amount based on this second pattern is given to the pot 7 from the bottom heating body 11.

In other words, "Hajime Choro Choro" is made into a low heat and gentle flame by heating in the "pot cooking" process, and "Medium Pappa" is made into a high heat and intense flame by heating until boiling in the "boiling heating" process. "If you blow it all the way, pull the fire" is a medium heat and gentle flame until it is cooked during the continuous boiling in the "boiling heating" process. "Na" is cooked twice during the "Murashi" process, with a low heat and a quiet flame, and is accompanied by the progress of the process by the conventional rice cooking control means 41 as shown in (A) of FIG. The change in the heating amount S2 to the pot 7 by the heating amount fluctuation means 44 as shown in FIG. 4B is added to the change in the heating amount S1 to the pot 7. The heating amount fluctuation means 44 sets the output maintenance time D at which the output of the inverter 37 is kept constant in the range of 0.1 seconds to 1 second in the cycle (cycle) C of 1 second to 10 seconds. A second pattern is created in which the output of the inverter 37 is increased or decreased stepwise for each output maintenance time D, and the output change amount E, which is the difference between the upper limit value and the lower limit value of the output of the inverter 37, changes to about 200 W. It is generated, and the fluctuation change of the heating amount S2 is given from the bottom surface heating body 11 to the pot 7 by this second pattern. As a result, the final heating amount S to the pot 7 shown in FIG. 3 is the heating amount S1 changed by the rice cooking control means 41 plus the heating amount S2 changed so as to fluctuate by the heating amount fluctuation means 44. Become.

The heating amount fluctuation means 44 heats the "pot cooking" process, and in order to realize a gentle flame with low heat, the output of the inverter 37 is set to 500 W (lower limit value) → 540 W → 580 W → 620 W → 660 W → 700 W. (Upper limit value) → 660W → 620W → 580W → 540W → 500W (lower limit value) is set as one cycle C, and for gentle flames, one cycle C is set as 7 seconds, so that each output becomes constant. The output maintenance time D to be maintained is set to 0.7 seconds, and a change cycle of the heating amount S2 such that the output of the inverter 37 changes every 0.7 seconds is repeatedly applied from the bottom heating body 11 to the pan 7. It is composed.

Further, the heating amount fluctuation means 44 heats up to boiling in the "boiling heating" process, and in order to realize a high heat and a violent flame, the high heat reduces the output of the inverter 37 to 1200 W (lower limit value) → 1240 W → 1280 W →. 1320W → 1360W → 1400W (upper limit) → 1360W → 1320W → 1280W → 1240W → 1200W (lower limit) is set as one cycle C, and for intense flames, one cycle C is set as the minimum 1 second. The output maintenance time D at which each output is kept constant is set to the minimum of 0.1 seconds, and the change cycle of the heating amount S2 so that the output of the inverter 37 changes stepwise every 0.1 seconds. Is repeatedly applied from the bottom heating body 11 to the pot 7.

In addition, the heating amount fluctuation means 44 sets the output of the inverter 37 to 800 W (in order to realize a mild flame on medium heat by the time it is cooked during the continuous boiling in the "boiling heating" process. Lower limit value) → 840W → 880W → 920W → 960W → 1000W (upper limit value) → 960W → 920W → 880W → 840W → 800W (lower limit value) is one cycle C, and a gentle flame is one cycle C. The heating is set to 4 seconds, and the output maintenance time D at which each output is kept constant is set to 0.4 seconds so that the output of the inverter 37 changes stepwise every 0.4 seconds. The change cycle of the amount S2 is repeatedly applied from the bottom surface heater 11 to the pot 7.

Furthermore, the heating amount fluctuation means 44 uses the "murashi" process and heating twice during the murashi to realize a quiet flame with low heat. → 540W → 580W → 620W → 660W → 700W (upper limit) → 660W → 620W → 580W → 540W → 500W (lower limit) is one cycle C, and one cycle C is the maximum 10 for quiet flames. The heating amount S2 is set as seconds, and the output maintenance time D at which each output is kept constant is set to the maximum of 1 second, and the output of the inverter 37 is changed stepwise every second. The change cycle is repeatedly applied from the bottom heating body 11 to the pot 7.

Note that FIG. 4B shows, as a typical example, the fluctuation changes of the three heating amounts S2 to the pot 7, but the heating amount S2 by the heating amount fluctuation means 44 and the pattern of the fluctuations are shown in the present implementation. It is not limited to what is shown in the form.

As described above, in the present embodiment, during the heating of the pot 7 in the first pattern by the rice cooking control means 41, the heating amount fluctuation means 44 changes the heating amount S2 to the pot 7 in a second pattern different from the first pattern over time. By giving such a change, it becomes possible to cook rice for the cooked rice A in the pot 7 by heating similar to the form of cooking a kamado in which the flame is shaken by a wood fire.

As shown in FIG. 5, in the heating amount fluctuation means 44 as the heating amount variable means, the heating amount S1 according to the first pattern executed by the rice cooking control means 41 is set as the reference value S1ave, and the heating amount S2 larger than the reference value S1ave. In the second pattern in which the upper limit value S2max of the above value S2max and the lower limit value S2min of the heating amount S2 smaller than the reference value S1ave are periodically repeated, the heating amount S of the bottom surface heating body 11 serving as the heating means is changed. ing.

For example, in the above-mentioned high heat, the heating amount fluctuation means 44 returns the output of the inverter 37 to 1200 W → 1240 W → 1280 W → 1320 W → 1360 W → 1400 W → 1360 W → 1320 W → 1280 W → 1240 W → 1200 W in one cycle C. The upper limit value S2max of the heating amount S2 is set to 1400W, the lower limit value S2min of the heating amount S2 is set to 1200W, and the upper limit value S2max and the lower limit value S2min of the heating amount S2 are changed periodically. In this case, the heating amount S2 is 1300W on average, but by making the heating amount S2 of 1300W correspond to the heating amount S1 by the conventional rice cooking control means 41 as the reference value S1ave, the heating by the heating amount fluctuation means 44 is performed. Even when the fluctuation of the amount S2 is taken into consideration, it is possible to prevent the cooked rice A in the pot 7 from being overheated or underheated.

Here, the output of the inverter 37 does not include an intermediate heating amount between the upper limit value S2max and the lower limit value S2min, and changes in one cycle C of returning from 1200 W to 1400 W to 1200 W in high heat, for example. , The heating amount fluctuation means 44 may be configured. In this case as well, by matching the average heating amount S2 of 1300W with the heating amount S1 by the conventional rice cooking control means 41, the heating amount fluctuation means 44 exhibits the same effect of eliminating overheating and underheating. Will be done.

As described above, in the present embodiment, among the heating amounts S1 according to the first pattern executed by the rice cooking control means 41, the heating amount S1 is set as the average reference value S1ave, and the upper limit value S2max higher than the reference value S1ave. The rice cooking amount fluctuation means 44 changes the heating amount S2 to the pot 7 so as to periodically repeat between the upper limit value S2max lower than the reference value S1ave, so that the average heating amount S1 of the conventional rice cooker It becomes possible to cook rice for the cooked rice A in the pot 7 by heating similar to the form of cooking a kamado in which the flame is shaken by a firewood fire while maintaining the above.

Further, the heating amount fluctuation means 44 as the heating amount variable means is a bottom surface serving as a heating means so as to periodically repeat the above-mentioned upper limit value S2max, lower limit value S2min, and one or a plurality of intermediate values in between. The structure is such that the heating amount S of the heating body 11 is changed.

For example, in the above-mentioned medium heat, in one cycle C until the heating amount fluctuation means 44 returns the output of the inverter 37 to 800W → 840W → 880W → 920W → 960W → 1000W → 960W → 920W → 880W → 840W → 800W. The upper limit value S2max of the heating amount S2 is 1000W, the lower limit value S2min of the heating amount S2 is 800W, and 840W, 880W, 920W, 960W are provided as intermediate values of the heating amount S2 in between, and the upper limit values are set. In addition to S2max and the lower limit value S2min, a plurality of intermediate values are changed so as to be periodically repeated. In this case, the intermediate value of the heating amount S2 of the bottom surface heating body 11 may be any number, and may be only one of 900W, for example.

In the above example, the change cycle of the heating amount S2 by the heating amount fluctuation means 44 is such that one cycle C is set to 1 second for a violent flame, one cycle C is set to 4 seconds for a mild flame, and one gentle flame is set. Cycle C is set to 7 seconds, and one cycle C is set to 10 seconds for a quiet flame. For example, on medium heat until boiling is continued during the "boiling heating" process. In order to realize a gentle flame, each output maintenance time D was set to 0.4 seconds corresponding to one cycle C being set to 4 seconds, but the upper limit value S2max of the heating amount S2 was set. At the time of output of 1000 W, the output maintenance time D is set to 0.1 second corresponding to the setting of one cycle C corresponding to a fierce flame to 1 second, and at the time of output of 920 W which is an intermediate value of the heating amount S2. The output maintenance time D can be set to 1 second corresponding to the setting of one cycle C corresponding to a quiet flame to 10 seconds, and the output maintenance time D is the total output in one cycle. It is not constant, but may be arbitrarily changed at each output.

As another example, in the above-mentioned low heat, the heating amount fluctuation means 44 returns the output of the inverter 37 from 500W → 540W → 580W → 620W → 660W → 700W → 660W → 620W → 580W → 540W → 500W. In cycle C, the upper limit value S2max of the heating amount S2 is 700W, the lower limit value S2min of the heating amount S2 is 500W, and 540W, 580W, 620W, and 660W are provided as intermediate values of the heating amount S2 in between. Therefore, in addition to the upper limit value S2max and the lower limit value S2min, a plurality of intermediate values are changed so as to be periodically repeated. In this case as well, there may be any number of intermediate values of the heating amount S2 of the bottom heating body 11, and the heating amount S2 may be increased or decreased in 20W increments or 50W increments instead of 40W increments between 500W and 700W. The value of may be set arbitrarily. Further, here, the output change amount E, which is the difference between the upper limit value S2max (= 700W) of the heating amount S2 and the lower limit value S2min (= 500W), is set to 200W, but 100W or 300W may be used, and the output change amount E may be used. The value of may be set arbitrarily.

As described above, in the present embodiment, when the heating amount fluctuation means 44 causes the heating amount S2 to the pot 7 to change with time in the second pattern, in addition to the upper limit value S2max and the lower limit value S2min of the heating amount S2, By adding a value of one or more intermediate heating amounts S2, it is possible to cook rice for the cooked rice A in the pot 7 with heating that is closer to the form of cooking a kamado in which the flame is shaken by a wood fire. It will be possible.

In the present embodiment, the heating amount fluctuation means 44 sets the upper limit value S2max of the heating amount S2, the lower limit value S2min, and one or more intermediate values into an irregular pattern or an irregular pattern. Is mixed to change the heating amount S2 of the bottom surface heating body 11 over time.

"Fluctuation" means unpredictable spatial or temporal changes or movements, and "unpredictable" means no regularity. In other words, the appearance of irregular spatial or temporal changes and movements is called "fluctuation". For example, not only the movement of the wind and the flow of the river, but also the flame of the firewood is an irregular pattern. included. It is well known that even what looks constant is not stable and unpredictable.

In addition, fluctuations in which irregular patterns are mixed in regular patterns are called "1 / f fluctuations", and the degree of fluctuations is represented by the "f" frequency, and the type of fluctuation is "1 / √". It is also well known that it is represented by "f", "1 / f", "1 / f ² ", "1 / f ³ " and the like.

In the above example, the heating amount fluctuation means 44 has described that the change with time of the heating amount S2 corresponding to the preset fluctuation is periodically repeated for each cycle C. For example, the detection temperature of the pot temperature sensor 15 or , Each value of the heating amount S2 (upper limit value S2max, upper limit value) triggered by a change in the rice cooking state that changes with heating to the pot 7 according to the detection temperature of the lid temperature sensor 16 and the detection pressure of the pressure sensor 17. The fluctuation pattern corresponding to the second pattern consisting of S2max (intermediate value) and time elements (cycle C, output maintenance time D) may be changed irregularly from a predetermined setting. ..

Hereinafter, specific examples will be described with reference to FIGS. 6 to 8. FIG. 6 is a graph showing the change over time in the temperature of each part of the rice cooker of the present embodiment until the inside of the pot 7 is boiled in the boiling heating process. In the figure, Tn indicates the change in the pot bottom temperature which is the detection temperature of the pot temperature sensor 15, Ts indicates the temperature change in the inner surface of the pot 7, and Tf (A) is the lid which is the detection temperature of the lid temperature sensor 16 in the normal state. Tf (B) shows the change in the lid temperature when the temperature rise in the upper layer in the pot 7 is faster than the temperature rise in the lower layer, and Tf (C) shows the change in the lid temperature in the upper layer in the pot 7. The change in the lid temperature when the temperature rise is slower than the temperature rise in the lower layer is shown, (d) shows the boiling detection due to the change in the temperature rise rate of the lid temperature Tf, and (e) shows the temperature rise rate of the pot bottom temperature Tn. Boiling detection is shown by the change of, and (H) shows the heating control until boiling.

When the pot 7 is strongly heated with the heating amount S of the bottom heating body 11 that realizes the above-mentioned high heat and intense flame by shifting to the boiling heating process under the control of the rice cooking control means 41, the pot bottom temperature Tn by the pot temperature sensor 15 is combined. , The lid temperature Tf by the lid temperature sensor 16 gradually rises. Here, the temperature rise rate (g) of the lid temperature Tf is assumed in advance with respect to the temperature rise rate (f) from immediately after the start of the boiling heating process until the pot bottom temperature Tn reaches 80 ° C., which is a predetermined temperature. If it is smaller than the predetermined temperature rise rate, it can be seen that the temperature rise of the upper layer portion in the pot 7 is slow. The cause may be that the amount of heating is weak, the amount of water that becomes the rice to be cooked A is large, or the water temperature is cold. The fire will be strengthened and the heat will be adjusted.

Therefore, in the present embodiment, in order to realize the same heating control as cooking in a kamado, the lid temperature is relative to the temperature rise rate (f) when the pot bottom temperature Tn reaches a predetermined temperature immediately after the start of the boiling heating process. If the temperature rise rate (g) of Tf is smaller than the predetermined value, the fluctuation pattern of the heating amount S2 to the pot 7 set as the second pattern during the subsequent heating adjustment (H) period until boiling is applied. The heating amount fluctuation means 44 is configured so that the heating amount S2 increases and temporarily changes.

That is, in the above-mentioned example, the lower limit value S2min is set to 1200 W and the upper limit value S2max is set to 1400 W in order to realize a violent flame with high heat by heating the heating amount fluctuation means 44 until boiling in the "boiling heating" process. The output maintenance time D in which the lower limit value S2min is increased from 1200 W to 1300 W or the heating amount S2 is maintained at the upper limit value S2max of 1400 W after the heating amount S2 is periodically and repeatedly changed in the cycle C of 1 second. Is lengthened from 100 ms (0.1 seconds) to 500 ms (0.5 seconds) to temporarily increase the heating amount S2 of the pot 7.

Next, in the "boiling heating" process, an example of adjusting the heating amount S2 during continuous boiling after boiling will be described with reference to FIGS. 7 and 8. In each of these figures, the heating amount fluctuation means 44 is based on the time point (X) when the temperature rise rate (e) of the pot bottom temperature Tn by the pot temperature sensor 15 becomes equal to or less than a predetermined value and boiling is detected until boiling. The temperature change of the lid temperature Tf by the lid temperature sensor 16 is used to monitor the temperature state of the upper layer in the pot 7, and the heating amount S2 according to the fluctuation pattern after boiling detection is adjusted according to the monitoring result. It is composed.

As shown in FIG. 7, the lid temperature Tf, which is the detection temperature of the lid temperature sensor 16, rises sharply when it starts to boil up to the upper layer in the pot 7. The phenomenon in which the lid temperature Tf rises above a predetermined value during a predetermined time at this time is monitored by the heating amount fluctuation means 44 by the temperature rise rate (i) of the lid temperature Tf.

Here, the heating amount fluctuation means 44 detects boiling when the pot bottom temperature Tn by the pot temperature sensor 15 becomes a predetermined value or less, that is, the temperature rise rate (e) of the pot bottom temperature Tn becomes a predetermined value or less during a predetermined time. With reference to the time point (X), it is determined how much time difference the time point when the temperature rise rate (i) of the lid temperature Tf rises to a predetermined value is. If the temperature rise rate (i) of the lid temperature Tf exceeds a predetermined value earlier than the time (X) when boiling is detected at the pot bottom temperature Tn, the heating amount is too strong or the cooked rice A. Since it is possible that the amount of water is too small or the water temperature is high, the heating amount fluctuation means 44 reduces the heating amount S2 of the pot 7 during continuous boiling. On the contrary, if the time when the temperature rise rate (i) of the lid temperature Tf becomes equal to or higher than the predetermined value is later than the time (X) when boiling is detected at the pot bottom temperature Tn, the heating amount is too weak or the amount of water. It is considered that the amount of water is too large or the water temperature is low. Therefore, the heating amount fluctuating means 44 increases the heating amount S2 of the pot 7 at the time of continuous boiling.

Further, as shown in FIG. 8, in the heating amount fluctuation means 44, the lid temperature Tf is equal to or less than a predetermined value within a predetermined time, that is, the lid, with reference to the time point (X) when boiling is detected at the pot bottom temperature Tn. It is determined how much time difference the time point at which the temperature rise rate (d) of the temperature Tf becomes equal to or less than a predetermined value and boiling is detected by the lid temperature sensor 16 is. If the time when the temperature rise rate (d) of the lid temperature Tf becomes equal to or less than the predetermined value with respect to the time (X) when boiling is detected at the pot bottom temperature Tn is delayed within the predetermined time, the heating amount is too strong. Alternatively, it is possible that the amount of water is too small or the water temperature is high, so that the heating amount fluctuating means 44 reduces the heating amount S2 of the pot 7 during continuous boiling. On the contrary, if the time when the temperature rise rate (d) of the lid temperature Tf becomes equal to or less than the predetermined value from the time when boiling is detected at the pot bottom temperature Tn (X) is delayed by more than the predetermined time, the heating amount. It is considered that the amount of water is too weak, the amount of water is too large, or the water temperature is low. Therefore, the heating amount fluctuation means 44 increases the heating amount S2 of the pot 7 at the time of continuous boiling.

That is, in the above example, the lower limit value S2min is set to 800 W in order to realize a mild flame over medium heat until the heating amount fluctuation means 44 is cooked during the continuous boiling in the "boiling heating" process. The upper limit value S2max was set to 1000W, and the heating amount S2 was periodically and repeatedly changed in the cycle C of 4 seconds. However, when increasing the heating amount S2 due to the fluctuation pattern after boiling detection, the lower limit value S2min was changed from 800W to 900W. The output maintenance time D in which the heating amount S2 is maintained at 1000 W, which is the upper limit value S2max, is made longer than the predetermined time of 400 ms (0.4 seconds). On the contrary, when reducing the heating amount S2 due to the fluctuation pattern after boiling detection, the upper limit value S2max is reduced from 100W to 900W, or the output maintenance time D in which the heating amount S2 is maintained at 900W is set to a predetermined time. It may be shorter than 400 ms (0.4 seconds).

In the present embodiment, due to the relationship between the temperature changes detected by the pot temperature sensor 15 and the lid temperature sensor 16, the amount of heating from the bottom heating body 11 to the pot 7 is S2, especially by heating until boiling or heating during continuous boiling. On the other hand, the description was made with the configuration of the heating amount fluctuation means 44 such that the irregular pattern is temporarily or the irregular pattern is mixed with the regular pattern, but in other rice cooking processes, for example, when cooking. With respect to the fluctuation of the heating amount S2 at the time of unevenness, a temporarily irregular pattern may be used, or an irregular pattern may be mixed with the regular pattern. Further, the trigger for forming a pattern including such irregularities is not limited to the relationship between the temperature changes detected by the pot temperature sensor 15 and the lid temperature sensor 16, but also the relationship between the pressure changes detected by the pressure sensor 17. May be considered.

In other words, in traditional kamado-cooking, firewood uses the five human senses as sensors, such as the burning condition of the firewood, steam and steam, the time when boiling noise is generated, the strength of steam generation and the time when steam is generated, and the scent. The heating power of the fire is adjusted, but it is not the same every time, but the rice is cooked by changing it flexibly according to the state of steam generation. As described above, even in the rice cooker of the present embodiment, the purpose may be to adjust the heating amount S2 next according to the rice cooking progress state such as the temperature and pressure at the time of cooking rice and the generation of steam.

Therefore, based on the pressure increase rate in the pot 7 detected by the pressure sensor 17 when pressurizing the inside of the pot 7 at the time of boiling and the depressurization rate (pressure decrease rate) in the pot 7 when the pressurization is released, the pot 7 is used. When the inside becomes a boiling state, the subsequent fluctuation of the heating amount S2 may be temporarily changed to a pattern including irregularity.

As described above, in the present embodiment, the heating amount S2 of the bottom surface heating body 11 is made into an irregular pattern by the heating amount fluctuation means 44, or the pattern is made by mixing an irregular pattern with a regular pattern. It becomes possible to cook rice for the cooked rice A in the pot 7 by heating more like the form of cooking a kamado in which the flame is shaken by a wood fire.

In addition, the method of adjusting the next heating according to the progress of rice cooking such as temperature and pressure during rice cooking and steam generation is controlled with AI (artificial intelligence) function from the actual temperature and pressure data of kamado cooking. The unit 31 may be trained to have irregularities in the instructions of the AI.

The heating amount fluctuation means 44 of the present embodiment periodically repeats the upper limit value S2max of the heating amount S2 and the lower limit value S2min of the heating amount S2, and sets the time element of the heating amount S2 according to the progress of the rice cooking process. The heating amount S2 of the bottom surface heater 11 is changed so that the upper limit value S2max and the lower limit value S2min, that is, the upper limit value S2max, the lower limit value S2min, and any or all of the cycle C which is the cycle are changed. ing.

This is due to the rice cooking control means 41, which is based on the above-mentioned method of controlling the heat of cooking a kamado, which is based on "Hajimechorochoro, Nakapappa, if you blow it all the way, pull the fire, burn a handful of straw, and do not remove the lid even if the baby cries." In response to changes in heating to the pot 7 over time, the amount of heating S2 to the pot 7 by induced heating is increased every 0.1 to 1 second in a cycle of 1 to 10 seconds according to the progress of each process of cooking rice. A second pattern is generated in which the output of the inverter 37 corresponding to the heating amount of the bottom heating body 11 is changed to about 200 W as a whole, and the heating amount S2 based on this second pattern is transferred to the pot 7. As given, it means that the heating amount fluctuation means 44 adds a heating configuration assuming fluctuation of the firewood flame.

In the above example, the upper limit value S2max and the lower limit value S2min of the strength waveform accompanying the time element of the heating amount S2 are changed according to the change with time of the rice cooking process. That is, in the heating of the boiling process corresponding to "Hajimechorochoro", the output of the inverter 37 is set to a low heat of 500 W to 700 W, and a gentle flame heating amount S2 with one cycle C of 7 seconds is given to the pot 7. In the heating process until boiling in the boiling heating process corresponding to "middle papa", the output of the inverter 37 is set to a high heat of 1200 W to 1400 W, and the heating amount S2 of the intense flame with one cycle C as 1 second is the pot 7. In the heating during the boiling process, which is equivalent to "pull the fire when it blows well", the output of the inverter 37 is set to medium heat of 800W to 1000W, and one cycle C is set to 4 seconds. The amount of heating S2 of the gentle flame is given to the pot 7, and in the double-cooking heating during the unevenness process, which is equivalent to "burn a handful of straw and do not remove the lid even if the baby cries", the inverter 37 The pot 7 is given a quiet flame heating amount S2 with an output of 500 W to 700 W and a low heat of 500 W to 700 W and one cycle C of 10 seconds.

As described above, in the present embodiment, the heating amount fluctuating means 44 changes the upper limit value S2max and the lower limit value S2min accompanying the time element of the heating amount S2 according to the change over time in the rice cooking process, so that each rice cooking process is performed. It is possible to cook rice for the rice to be cooked A in the pot 7 by heating, which is different, and which is similar to the form of cooking a kamado in which the flame is shaken by a wood fire.

In the heating amount fluctuation means 44 of the present embodiment, the upper limit value S2max of the heating amount S2, the lower limit value S2min of the heating amount S2, and one or a plurality of intermediate values of the heating amount S2 are set in a stepwise plurality of heating amounts S2. It has a configuration to be set more.

FIG. 9 shows the relationship between the heating amount S2 and time in high heat in which the output of the inverter 37 in the above example is in the range of 1200 W to 1400 W. As shown in FIG. 3B, the heating amount fluctuating means 44 sets the heating amount S2 corresponding to high heat from the heating amount S2 in six stages consisting of 1200W, 1240W, 1280W, 1320W, 1360W, and 1400W. The length of the heating amount S2 in the step, that is, the length of the output maintenance time D constitutes the fluctuation of the heating amount S2. For comparison, FIG. 3A shows an example in which the heating amount S2 is continuously and steplessly changed by the heating amount fluctuation means 44.

FIG. 10 shows the relationship between the heating amount S2 and time on medium heat in which the output of the inverter 37 in the above example is in the range of 800 W to 1000 W. As shown in FIG. 3B, the heating amount fluctuating means 44 sets the heating amount S2 corresponding to medium heat from the heating amount S2 in six stages consisting of 800W, 840W, 880W, 920W, 960W, and 1000W. The length of the output maintenance time D at each stage constitutes the fluctuation of the heating amount S2. For comparison, FIG. 3A shows an example in which the heating amount S2 is continuously and steplessly changed by the heating amount fluctuation means 44.

FIG. 11 shows the relationship between the heating amount S2 and the time at low heat in which the output of the inverter 37 in the above example is in the range of 500 W to 700 W. As shown in FIG. 3B, the heating amount fluctuating means 44 sets the heating amount S2 corresponding to low heat from the heating amount S2 in six stages consisting of 500W, 540W, 580W, 620W, 660W, and 700W, respectively. The length of the output maintenance time D at the stage constitutes the fluctuation of the heating amount S2. For comparison, FIG. 3A shows an example in which the heating amount S2 is continuously and steplessly changed by the heating amount fluctuation means 44.

As described above, in the present embodiment, the heating amount fluctuation means 44 sets the heating amount band (range of the heating amount S2) constituting the main part of, for example, high heat, medium heat, and low heat with the upper limit value S2max and the lower limit value S2min. It is configured to be set from the heating amount in multiple stages including the intermediate value. Therefore, it is not necessary to continuously change the high-frequency pulse drive signal to the inverter 37, the circuit configuration of the first heating drive unit 32 including the inverter 37 can be simplified, and the inverter 37 can be downsized. Become.

The heating amount fluctuation means 44 of the present embodiment has a configuration in which the upper limit value S2max of the heating amount S2 is set so as not to exceed the rated power consumption of the rice cooker.

The display of the rated power consumption of the rice cooker is stipulated by the Electrical Appliance and Material Safety Law. In the above example, even if the output of the inverter 37 is set to 1200 W to 1400 W under high heat, the power consumption fluctuates with time. Power consumption inspection on assembly lines becomes difficult. Therefore, in the present embodiment, the output of the inverter 37 corresponding to the upper limit value S2max of the heating amount S2 does not exceed the rated power consumption of the rice cooker by the control unit 31 including the rice cooking control means 41 and the heating amount fluctuation means 44. , Or even if it exceeds 5%, specifically, when the rated power consumption of the rice cooker is 1400 W, the control is limited so that the output of the inverter 37 is 1470 W or less. Further, as a test mode for inspection, the control unit 31 of the rice cooker operates the inverter 37 at an output of 1400 W for, for example, 60 seconds, or outputs the inverter 37 continuously for a predetermined time (not shown). The configuration of may be added.

However, the rated power consumption of the rice cooker includes not only heating from the bottom heating body 11 to the pot 7 by the heating coil, but also heating to the lid 2 by the lid heating body 18 and the side surface of the pot 7 by the side heating body 12. For example, when the power consumption of the lid heating body 18 is 50 W and heating is performed at the same time as the bottom heating body 11, the total power consumption of the bottom heating body 11 and the lid heating body 18 is added. Therefore, it is preferable to set 1350 W, which does not exceed the rated power consumption of the rice cooker, as the output of the inverter 37 corresponding to the upper limit value S2max of the heating amount S2.

Further, in the above example, the output of the inverter 37 is set to 1200 W to 1400 W, and the lower limit value S2min of the heating amount S2 is set to 1200 W. Since the corresponding thermal power does not decrease significantly instantaneously even if there is fluctuation, the heating amount fluctuation means 44 sets the lower limit value S2min so that the lower limit value S2min of the heating amount S2 does not fall below 50% of the upper limit value S2max. It is preferable to set the limitation of. That is, when the upper limit value S2max of the heating amount S2 is 1400W, the lower limit value S2min of the heating amount S2 is limited so as not to be less than 700W.

As described above, in the present embodiment, when the fluctuation control is added to the heating amount S2 of the bottom heating body 11 by the heating amount fluctuation means 44, there is no problem in the power consumption inspection at the time of manufacturing, and the rice is cooked in compliance with the law. It is possible to prevent problems such as the current exceeding the rated power consumption of the rice cooker and the current limit of the indoor wiring flowing.

The heating amount fluctuation means 44 of the present embodiment is configured to have a plurality of second patterns according to the type of rice cooking performed by the rice cooking control means 41.

The rice cooking control means 41 detects the amount of rice to be cooked A (rice cooking amount) put in the pot 7, and changes the heating pattern, which is the first pattern, according to the amount of rice cooked. , Brown rice, divided rice, local varieties brand rice, etc. are selected by operation from the operation unit 4, and the rice is cooked in a heating pattern according to the rice quality, and the rice is firm, soft, sticky, sweet, etc. A method of cooking rice by varying the cooked texture by an operation from the operation unit 4 and cooking rice according to the heating pattern is well known. In the present embodiment, the storage means 35 stores in advance a specific second pattern that enables the heating amount fluctuation means 44 to control the fluctuation of the heating amount S2 with respect to the various conventional rice cooking performed by the rice cooking control means 41. It is possible to select and apply from the plurality of second patterns.

As described above, in the present embodiment, the second pattern that enables appropriate control of the fluctuation of the heating amount S can be selected according to the rice cooking amount, the rice cooking menu, the cooking method, and the brand of the rice producing area.

The present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention. For example, the "predetermined value", "predetermined temperature", "predetermined temperature rise rate", etc. that frequently appear in the present embodiment do not have to be the same value each time, and may be set to different values. ..

7 pot 11 bottom heating body (heating means)
41 Rice cooking control means 44 Heating amount fluctuation means (heating amount variable means)

Claims (8)

A pot for storing rice to be cooked and
A heating means for heating the pot and
A rice cooking control means for cooking rice to the cooked rice by changing the heating amount of the heating means in the first pattern as the process progresses.
When the rice cooking control means controls the heating means so as to heat the pot, the heating amount is variable by changing the heating amount of the heating means over time in a second pattern different from the first pattern. Means and
A rice cooker featuring a rice cooker. The heating amount variable means has an upper limit value of a heating amount larger than the reference value and a lower limit value of a heating amount smaller than the reference value, with the heating amount according to the first pattern executed by the rice cooking control means as a reference value. The rice cooker according to claim 1, wherein the heating amount of the heating means is changed so as to periodically repeat the above. The heating amount variable means is characterized in that the heating amount of the heating means is changed so as to periodically repeat the upper limit value, the lower limit value, and one or a plurality of intermediate values between them. The rice cooker according to claim 2. The heating amount variable means uses the upper limit value, the lower limit value, and the intermediate value in an irregular pattern, or a mixture of an irregular pattern and an irregular pattern to control the heating amount of the heating means. The rice cooker according to claim 3, wherein the rice cooker is to be changed. The heating amount variable means is characterized in that the heating amount of the heating means is changed so that the upper limit value and the lower limit value accompanying the time element of the heating amount change according to the progress of the process. The rice cooker according to claim 1. The rice cooker according to claim 3, wherein the heating amount variable means sets the upper limit value, the lower limit value, and the intermediate value of the heating amount from a plurality of stepwise heating amounts. vessel. The rice cooker according to claim 6, wherein the heating amount variable means is set so that the upper limit value of the heating amount does not exceed the rated power consumption of the rice cooker. The rice cooker according to claim 1, wherein the heating amount variable means has a plurality of the second patterns according to the type of rice cooked by the rice cooking control means.

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