JPH0217016A - Quick boiling method for small quantity of rice - Google Patents

Abstract

PURPOSE:To boil a little quantity of rice with good taste and quickly by a method wherein the rice is heated by low electric power without preheating and the time is shortened when it boiled rice is matured for settling. CONSTITUTION:The central processing unit for a microcomputer in a control unit 10, according to a program stored in its memory, processes working modes, such as preheating, strong heating in the hall-way stage, electric power control ling, and maturing for settlng. In the case of quick-boiling a little quantity of rice, the preheating mode is omitted and the strong heating mode in the hall-way stage is directly processed, and then the rice is heated to the boiling temp. of 98 deg.C by lower electric power. When a heating mode is shifted to I mode of the electric power control, the rice is boiled after it is heated at a temp. of 118 deg.C with a ratio of power conduction (18/30) according to its heating pattern. At the following process, the re-discrimination for the quantity of rice is performed and a compensatory heating pattern is set when the re- discrimination for the quantity of rice of the last time corrected and processed. In the maturing mode, it takes 10 minutes in total to mature the boiled rice and it is shorter by 3 minutes as compared with 13 minutes in totality to mature the boiled rice in the case of a medium or large quantity of rice.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for rapidly cooking small amounts of rice using a rice cooker, rice cooker, etc.

(Prior art) Conventionally, when cooking rice using a rice cooker or the like that has a built-in microcomputer and heats an inner pot via a heating plate while controlling power to a heater, the process is as shown by the broken line in Figure 5. After power is turned on to the heater, the rice is preheated at low power until Ny to absorb enough water, and then the boiling N
After heating and boiling at full power until n o'clock, heating and cooking at low power until no water is left, -.
After a certain period of time ΔN, heating is continued at a lower power until the time of Ne, and the heating is unevenly carried out to become alpha.

In addition, as shown by the dashed line in Fig. 5, heating is omitted from above and immediately after the start of electricity supply to the heater, it is heated at full power until it boils at 4 degrees Hn. By cooking until , time L and then changing until Δ11 hours later until time Ile, the cooking becomes ijJ function.

(Problems to be Solved by the Invention) However, in the conventional rice cooking method described above, when a small amount of rice is boiled, the rice at the bottom becomes hard because it is cooked before it absorbs water. There was a problem.

The present invention was made in view of the above problems, and an object of the present invention is to provide a method for quickly cooking a small amount of rice, which makes it possible to cook a small amount of rice deliciously but quickly.

(Means for Solving the Problems) In order to achieve the above object, the present invention is capable of cooking rice by heating the inner pot with the heating plate while controlling the four forces applied to the heater. In the low-temperature rapid cooking method, preheat the rice as shown by the solid line in Figure 5. TaS.

The unevenness time ΔS from the time to the end of unevenness Se is reduced by -4゛rura compared to normal rice cooking.

(Function) If the rice is heated immediately at a lower power than normal cooking without preheating, the temperature will rise slowly, and the rice in the inner pot will be boiled and cooked while absorbing water in any part.

Then, the rice is cooked and stirred in the same way as regular rice cooking, but since the capacity is small and there is less variation in the temperature of the three parts of rice in the inner pot, the cooking time is shorter than that of a pot with a larger capacity. The gelatinizes quickly and uniformly in any part of the inner pot.

In addition, preheating is omitted, and as a result of further shortening the cooking time, Se at the end of cooking is different from Ne at the end of cooking rice.
It's faster than that.

(Example) Next, one embodiment of the present invention will be described with reference to the accompanying drawings.

FIG. 1 shows a rice cooker to which the rice cooking method according to the present invention is applied, where i is the main body, 2 is the shoe body, 3 is an outer pot forming the inner wall of the main body 1, and 4 is housed in the outer pot 3. Inner pot, 5 is outer pot 3
6 is a heater embedded in an annular shape in the heating plate 5, and 7 is a temperature sensor such as a thermistor that is pressed against the outer surface of the bottom center of the inner pot 4. This constitutes a part of the temperature detection means 11 of the control device 10, which will be described later. The surface heater 6 is controlled by a control device 10 via a heater drive means 20 consisting of a relay or the like.

Control device! 0 is equipped with a micro combi coater, and includes a temperature detection means 11, a time measurement means I2, and a detected temperature storage means 13.
, a set value storage means 14, a rice cooking capacity determination means I5,
Rice cooking capacity adjustment means 16 and power control means 17
It is composed of.

The temperature detecting means 11 detects the temperature of the inner pot 4, that is, the temperature of the rice cooking material in the inner pot 4 using the Moeki temperature change sensor 7.

The timer 12 includes a mode timer that measures the elapsed time of each mode operation, an energization timer that measures the energization time or energization stop time to the heater 6, a capacity determination timer, a capacity re-determination timer, and the like. The detected temperature storage means 13 stores the detected temperature detected by the temperature detection means 11 in a memory (RA
M). The set value storage means 14 stores, in a memory (ROM), the energization rate to the heater 6, the start reference temperature 3 at the time of rice cooking capacity determination or re-discrimination, the determination reference temperature 3, the determination reference time, and the like.

The rice cooking capacity determination means 15 determines the rice cooking capacity by comparing the temperature detected by the temperature detection means 11 and the determination reference temperature at a predetermined determination reference time after reaching a predetermined start reference temperature, and performs heating according to the capacity. Set a pattern.

Method for re-judging cooking capacity! 6 compares the detected temperature of the temperature detection means II with the discrimination reference temperature at a predetermined discrimination reference time after reaching a predetermined starting base Q temperature, re-discriminates the rice cooking capacity, and performs corrected heating according to the said capacity 14. Set a pattern.

The power control means 17 uses the settings stored in the set value storage means +4. turn on and off the heater 6 via the heater drive means 20 at the 'ii rate or the energization rate set according to the rice cooking capacity determined by the rice cooking capacity 4 discrimination stage 15 or the rice cooking capacity re-discrimination means 16; Control power.

In the rice cooker with the above configuration, the control device!
0 micro combi coater central processing unit (CPU
) executes the program stored in the memory (ROM), each of the above means operates to perform preheating, middle heating, power control 1. The power control mode (1) and uneven power control mode operation are now performed.

) In the preheating mode, that is, when the rice cooking switch (not shown) is pressed or the rice cooking timer times up, the timer 12 starts measuring time and the temperature detector 11 detects the temperature of the inner pot 4 at the same time. In the case of normal rice cooking, the power control means 17 starts energizing the heater 6 at a predetermined energization rate to heat the inner pot 1, and maintains the water temperature for a certain period of time based on the temperature detected by the temperature detection means If. A preheating mode is entered to maintain the predetermined temperature and allow the polished rice to absorb sufficient water, but the main preheating mode is omitted when a small amount of quick rice is cooked.

) When the power to the heater 6 is started in the mode of small quantity quick cooking,
Immediately, Nakaba moves into mode.

That is, as shown in FIG. 2a, in step 50, the power control means 17 turns on the heater 6 at an energization rate of 10/15.
energization is started, and the rice cooking capacity is determined in step 51 :). Then, in step 52, when the detected temperature 0 reaches the middle end temperature of 98° C., the process shifts to the next power control mode 1.

As shown in FIG. 3, the cooking rice volume determination routine returns if the detected temperature 0 is less than 50°C, which is the starting reference temperature, and if it is 50°C, returns to step 502.
Set the capacity determination timer with Htm = 0),
-) Heating pattern 1) T is set to "A" using the block 503.

Further, if the detected temperature 0 exceeds 50° C. in step 501, capacity determination is started in steps 50, 1 and thereafter.

The texture of the heating pattern PT in I in FIG. 4 is as follows.

A: 2 to 3 cups of white rice B. 1 to 5 cups of white rice C2 6 to 7 cups of white rice At step 50-1, the count value of the timer for determining capacity is 11
It is determined whether tm has passed 320 seconds, which is the first determination reference time. Here, 320 seconds B! If 320 seconds have elapsed, the process returns via step 507, and if 320 seconds have elapsed, the detected temperature O is compared with 97° C., which is the determination reference temperature, in step 505.

If the detected temperature 0 is 97°C or higher, the process returns while maintaining A″. If the detected temperature is 0 or lower than 97°C, it is determined that the rice is 2-3 cups of polished rice and the heating pattern P-T is set in step 506. After setting it to l(", step 507 is performed multiple times.

In step 507, the count value H of the timer for determining the burial mound
If tm has not passed the first determination standard time of 530 seconds, return; if 530 seconds have passed, step 50
In step 8, the detected temperature 0 is compared with 98° C. which is the discrimination reference temperature. If the detected temperature 0 is 98℃ or higher, leave “B” as is.
If the temperature is less than 98° C., the heating pattern PT is set to “C” in step 509, and then the process returns.

iii) m-force control 1 mode At step +00 shown in FIG. 2a, the rice cooking capacity M
A heating pattern FT set according to the container to be determined is determined in the determination routine. And steps 110, 120,
At 130, power is controlled at a preset energization rate for each heating pattern PT.

That is, when the heating pattern PT is "A", the heater 6 is energized at a current of $18/30 in step 110, and if the detected temperature 0 is lower than the finished cooking temperature of 118 degrees Celsius in step III, step The rice cooking capacity is re-determined at +12. Then, in step 113, the next mode transition flag TP is set in the rice cooking capacity re-determination routine.
If the detected temperature is 118°C or higher in step 111, the mode is continued, and if it is “ON”, the mode is shifted to the next mode. do.

Next, heating pattern I) When T is "B", Δ is the same as the flow of the above "A" pattern except that the energization rate is 22/30 and the cooking temperature is 121 ° C. omitted.

Moreover, when the heating pattern PT is "C", the energization rate is 2.
On 7/30, the temperature at which the rice is cooked is 21'C, but the power is controlled according to the flow without re-judging the rice cooking capacity.

Rice Cooking Capacity Re-Discrimination Routine As shown in FIG. 4, the rice cooking capacity re-discrimination routine returns in step 601 if the detected temperature 0 is less than 98°C, which is the starting reference temperature, and returns to step 602 if it is 98°C.
Set the timer for furuzuke re-discrimination at step 603 (Ftm=0), and turn off the next mode transition function 'rF' at step 603.
Then, in step 604, the correction heating bar and turn PT* are set to "do".

Supported, detected in step 601, Δ is 98°C
In step 605, if the capacity i is exceeded by 1-1,
Start T4 discrimination.

Note that the texture of the corrected heating pattern PT* is as follows.

1: Foreign object (foreign object such as rice grains exists between the inner pot 4 and the heating plate 5) 11: 2 to 3 cups 111: 4 to 6 cups The count value Ft of the timer for capacity re-judgment in step 605
111 is the first determination reference time of 120 seconds, fl, and tJI determines whether it is old or not. Here, if 120 seconds have not elapsed (if 120 seconds have elapsed, then return through step 609 and
If 20 seconds have passed, step 606 detects the detected temperature lfO.
and the discrimination reference temperature of 100°C. Detection temperature 0
If the detected temperature O is less than 110℃, it will return while maintaining the “de” as it is.If the detected temperature O is less than 110℃
In step 607, the next mode transition flag TF is set to “OFF”.
”, and in step 608 the corrected heating pattern p ′r
After setting * to II'', return.

In step 609, if the count value Fta+ of the capacity re-determination timer has not passed 240 seconds, which is the second discrimination reference time, the process returns; if 240 seconds have passed, in step 610, the detected temperature O and the discrimination reference temperature are returned. compared to 97°C. If the detected temperature O is 97°C or higher, it remains at "11" (returns at 7), and if it is lower than 97°C, the next mode transition flag T F is set to "ON" in step 611.
", and in step 612, the corrected heating pattern P i" is set.
After using * as “use”, return.

iv) Power control mode In step 20 () shown in FIG. 2b, the corrected heating pattern PT* that has been reset in accordance with the t-II capacity in the rice cooking field...reset 1 separate routine is determined.

Then, in steps 210, 220, and 230, power control is performed at a preset energization rate for each corrected heating pattern.

That is, when the corrected heating pattern p'r* is "1", the heater 6 is energized at the energization rate of 22/30 in step 210, and the detected temperature O is 130° C., which is the cooking temperature, in step 211. This mode continues until -.

In addition, the corrected heating pattern p 'r * is "°■", "■"
When , the energization rate is 20/30.24/30, respectively.
This is the same as the flow of the above-mentioned "bi-pattern" except that the cooking temperature is 118 DEG C. and 121 DEG C., and the explanation will be omitted.

On the other hand, in the electric horn control I mode, the heating pattern ■) T is C'' has the same flow as the corrected heating pattern PT*hji■'' in this mode, but the finished cooking temperature is lower than the power control This mode is the same as the I mode, and normally skips this mode and shifts to the next mode, uneven mode.

V) Uneven mode power control■ When exiting the mode, step 310.32
At 0.330, the heater 6 is controlled on and off for each corrected heating pattern PT* to enter the uneven mode.

When the corrected heating pattern PT* is “B”, step 31
At step 311, the heater 6 is turned off and the energization timer is set.
3 maintains the off state until 6 minutes have elapsed, and at the same time turns on the heater 6 with the steady 3I2, resetting the energization timer, and in step 313, the count value of the a-power timer [@ is 5 seconds Remains on until the time elapses.

Similarly, the heater 6 is turned off for 1 minute and 20 seconds in steps 314 and 315, the heater 6 is turned on for 5 seconds in steps 3163+7, and further 5 minutes in steps 318 and 319: (
The heater 6 is turned off for 0 seconds to end the uneven mode.

As a result, the total unevenness time when the corrected heating pattern PT* is I' is 13 minutes.

Next, when the corrected heating pattern p'r* is "H", the first and second on-states are both 0 seconds, and the second and third off-states are each 1 minute and 25 seconds. seconds, 2
The flow is the same except that the total heating time is 10 minutes, and the explanation is omitted. or 0
seconds, Ai except that the second off state is 1 minute 25 seconds
This is the same flow as pattern "I" in pattern j, and the explanation will be omitted.

In this way, the total cooking time in the cooking mode is 10 minutes for those with a small rice cooking capacity, and 10 minutes for those with a medium cooking capacity.

It takes 13 minutes for multiple rice cookers, which ensures a time proportional to the rice cooking capacity. If the amount of dirt is small, there will be little variation in the temperature of the cooked rice in the inner pot 1, and gelatinization will occur quickly and uniformly, so that the smearing time will be short. On the other hand, in the case of a large amount of cooked rice, the temperature within the inner pot 4 of the cooked rice varies, and it is necessary to allow sufficient cooking time to prevent which part of the rice from becoming pregelatinized.

In the conventional rice cooking method, the total cooking time is set at a fixed value depending on the case of a large amount of rice, and when cooking a small amount of rice, it is assumed that only the cooking process has already been completed and the rice cooking time has to be started at the scheduled time. However, in this embodiment, the uneven time is set according to the rice cooking capacity 41, so the cooking time is short! In the case of i, the random time will be shortened and the waiting time will be eliminated.

Next, perform a small amount quick rice cooking operation performed according to the following (1) chart in (1n).
Each state of large amount and the state of foreign matter will be specifically explained.

■In the case of small quantities (2 to 3 cups), use the Meniko switch, etc.
If a small amount rapid -1 is selected properly, the preheating mode is omitted and the medium mode is immediately entered, and the energization rate is 10/1.
5, that is, normal rice cooking (30/30), and the rice is heated to a boiling temperature of 98° C. with low power (steps 50 to 53).

As a result, as shown by the solid line in Figure 6, the temperature rises (1) -L by 4 degrees more slowly than normal rice cooking, so the rice in the inner pot 1 absorbs water in 1 minute while it is boiled. It is cooked and turned into a paste.

In this middle mode, the capacity 11 determination is performed (step 51), or in this case, the heating pattern PT
is set to "A".

When entering power control l mode, IJII thermal pattern P'
! The rice is heated to a cooking temperature of 118 DEG C. at an energization ratio of 18/'30 corresponding to "A" (step 110), and the rice is cooked. In this power control mode 11, the rice cooking capacity is re-determined (step +12).
If it is determined correctly in the previous rice cooking volume determination (step 52), the corrected heating pattern 1) r* is set to ■''.

Therefore, in the next power control mode, the energization rate of 20/30 is set according to the corrected heating pattern PT*-"■" (step 220), but the cooking temperature is 118°C, which is the same as in the power control I mode. (Step 221)
, bypass this mode and enter uneven mode.

In the unevenness mode (steps 320 to 329), the total unevenness time is 10 minutes, which is 3 minutes shorter than the total unevenness time of 13 minutes in the medium and large amount unevenness modes (steps 330 to 339). This is because the rice cooking capacity is small and there is little variation Δ in the temperature of the rice in the inner pot 4 when it is cooked in the power consumption mode. Alf? 1-1J for a short period of time due to
This is because he was able to do so.

■Regardless of whether it is medium quantity, large quantity medium quantity (4 to 5 cups), or large quantity h1 (6 to 8 cups), if [small quantity rapid - 1] is selected by mistake, as in the case of Mengki Sho 1, Although p-thermal mode is omitted,
In the middle of the mote, the energization rate is 22/30 in the middle amount,
If a large amount is used, the rice will be heated with a lower electric power than normal rice cooking, such as at an energization rate of 27:30, and the rice will not become hard because it absorbs enough water and is cooked.

Is this middle-aged woman in mode? By JI, especially in the case of cooked rice, water containing broth, soy sauce, and TL is used, so the volume is determined to be smaller than the actual volume, which may result in insufficient heating in the next power control mode.

However, in this embodiment, the rice cooking capacity M is re-determined in the power control 1 mode (step 112, 122) and the corrected heating pattern p'r* is set, and this corrected heating pattern P
Since proper heating is performed using the power control 11 mode at T*, there is no possibility of insufficient heating or undercooking.

For example, if it is determined that the cooked rice is small or medium-sized, the heating pattern l) T is set to "8" or "B" and the energization rate is low in power control 1 mode. When the rice is heated (steps 110 and 120), the cooking capacity is re-determined (steps 112 and 122).
<Corrected heating pattern PT*forced by large quantity and SE1
” and the next mode transition flag TF is set to “
ON" (step 611), the cooking mode immediately shifts to the power control mode (2), heating is performed at a new high energization rate (step 230), and the cooking is finished.

Also inside! If it is determined that there is a small amount of F1t in the warehouse, the rice cooking capacity is similarly determined (Step 1).
12), the rice is correctly determined to be medium M, and the rice is heated at a new high energization rate in the electricity rate σ11■ mode (step 230) and cooked.

■Foreign object If there is a foreign object such as rice grains between the heating plate 5 and the inner pot 4, the temperature sensor 7 will detect the gap between the heating plate 5 and the inner pot 4.
It comes into pressure contact with the inner pot 4 while protruding from the B1 hot plate 5. Therefore, when heated with a foreign object present, the temperature sensor 7 not only detects the temperature of the inner pot 4 through the pressure contact surface on its upper surface, but also picks up the heat of the heating plate 5 from the side surface, and as a result, the temperature sensor 7 detects the temperature. The temperature is higher than the actual temperature of the inner pot 4, but there is a strong possibility that the temperature will rise.

Therefore, capacity determination at the middle (step 52)
), heating pattern I)T is set to "A", and heating is performed at a low energization rate in power control 1 mode (step 11).
0), so if left as is, there will be insufficient cooking.

However, in the power consumption σl I mode, the presence of a W object was detected by the re-judgment of the rice cooking capacity r1 (step 112), and the power control mode was set to a new high energization rate and a higher cooking temperature than the Shintsu cooking rice. Since it is heated to a certain temperature of 130° C. (steps 210 and 211), it can be cooked even if foreign matter is present.

(Effects of the Invention) As is clear from the explanation in F below, according to the present invention, even if preheating is omitted, the water is boiled with low power while upward water absorption is performed, and the boiling time is shortened and the cooking time is reduced. If it is 1, there will be little variation in the temperature within the inner pot, and the cooking process will be sufficient, resulting in soft and delicious rice. Furthermore, even though preheating is omitted, the rice is cooked faster than normal rice cooking due to the shortening of the cooking time.

[Brief explanation of the drawing]

Fig. 1 is a schematic configuration diagram of a rice cooker to which the rice cooking method according to the present invention is applied, Figs. 2a and 2b are a flowchart of a small amount of quick rice cooking, Fig. 3 is a flowchart of a rice cooking capacity determination routine, and Fig. 4 is a rice cooking The flowchart of the capacity re-judgment routine, FIG. 5, is a diagram showing temperature changes and power transitions during rice cooking. 4. Inner pot, 5. Heating plate, 6. Converter. Figure 2a Patent Applicant Zojirushi Mahobin Co., Ltd. Representative Patent Attorney

Claims (1)

[Claims] (1) In a small amount rapid rice cooking method in which rice is cooked by heating an inner pot via a heating plate while controlling the power to the heater, heating is performed at low power without preheating, and the cooking time is shortened. A small amount rapid cooking method featuring the following.