JPH0829128B2 - Automatic rice washing rice cooker - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an automatic rice-washing rice cooker that automatically performs each process from washing rice to cooking rice and retaining heat.

2. Description of the Related Art A conventional automatic rice washing rice cooker of this type is as shown in FIG.

The configuration will be described below with reference to FIG. Reference numeral 10 denotes an automatic rice-washing rice cooker main body (hereinafter referred to as a main body), and a rice cooking chamber 11 has a heating coil 12 for induction heating on a lower peripheral portion and a bottom surface of the outer surface, a lid 13 on an upper portion, and a peripheral portion and a lower portion. Lower members 14 and 14a of the rice cooking chamber are provided in each. Rice cooker
A rice cooking pot 15 is detachably stored inside 11. A coupling 16 is fixed at the approximate center of the bottom of the rice cooking pot 15,
A rotor (18) driven by a driving means such as a motor (17) is detachably fitted and a rice cooking pot (15) is rotatably supported. The rice cooking pot 15 has a flange portion 19 that spreads outward at the upper opening thereof. The outer end of this flange portion 19 is
It faces a drainage groove 20 formed around the upper part of the rice cooking chamber 11. The opening of the rice cooking pot 15 is covered with the inner lid 21.
Is fitted into the rice cooking pot 15 with a gap 23 partially due to the contact of the extruding portion 22 formed on the periphery thereof. This inner lid
21 is detachably held by the lid 13. Further, the lid 13 is pivotally attached to an outwardly extending portion of the heating chamber 11 via a hinge so as to be rotatable, and a steam port 24 is formed on the surface thereof. This steam port 24 is a water supply pipe for supplying water to the rice cooking pot 15 through the steam port 24.
25 faces. The water supply pipe 25 is connected to a water supply, a water supply pump or the like (not shown) via an electromagnetic valve 26. Reference numeral 27 is a temperature sensor that moves up and down by the operation of the solenoid 28.

 The operation of the above configuration will be described.

When rice is put in the rice cooking pot 15 of the main body 10 and the operation is started, the solenoid 28 is first energized and the temperature sensor 27 descends. Next, the electromagnetic valve 26 is activated to open the flow path for a certain period of time, and a certain amount of water flows into the rice cooking pot 15 from the water supply pipe 25 through the steam port 24. Subsequently, the motor 17 is intermittently energized and the rice cooking pot 15 intermittently repeats normal rotation / stop. This action causes the rice and water in the rice cooking pot 15 to move, and the rice is washed due to the difference in the inertia.

After washing the rice, it moves to drainage, the motor 17 is continuously energized, and the rice cooking pot 15 continuously rotates in one direction. As a result, the washing water is drained by the centrifugal force through the gap 23 between the rice cooking pot 15 and the inner lid 21, flows into the drain groove 20 and is drained through the drain pipe 20a.

The steps of water supply, rice washing, and drainage are set as a series, and the rice washing is completed by repeating this step several times.

Then, the electromagnetic pulp 26 is energized for a certain period of time to supply a predetermined amount of water for cooking rice. Then, the energization of the solenoid 28 is stopped, and the temperature sensor 27 rises to come into contact with the rice cooking pot 15.

After that, like the conventional automatic rice cooker, the process proceeds to the rice cooking / heat-retaining process, and the series of rice cooking is completed.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention In such a conventional automatic rice-washing rice cooker, the water supply for cooking rice, that is, the water addition and reduction, is performed by supplying water for a fixed time corresponding to the amount of rice. However, the amount of water supply depends on the water supply environment of the place where the automatic rice-washing rice cooker is installed. For a certain period of time, the amount of water supply is high at high water pressure and low at low water pressure. Therefore, in the water supply method by supplying water for a certain period of time, there is a problem that the water content varies, and cooked rice is too soft or too hard.

The present invention solves the above-described problems, and a first object of the present invention is to provide an automatic rice-washing rice cooker having proper rice cooking characteristics and stable rice cooking characteristics.

Also, when the water content becomes inappropriate due to some disturbance, the second purpose is to provide an automatic rice-washing rice cooker that can adjust the water content again and make the water content appropriate. .

A third object is to provide an automatic rice-washing rice cooker capable of preventing the above-mentioned re-addition of water from becoming inappropriate.

Means for Solving the Problems In order to achieve the above-mentioned object, the first means is
The rice cooker comprises water supply means for supplying water to the rice cooker, drainage means for draining water in the rice cooker, weighing means for measuring the weight of the rice cooker, and water control means for water control. The means sets the actual water supply time shorter than the water supply time calculated from the predetermined water supply amount and the water supply speed, supplies water for the actual water supply time, and then measures the water by the measuring means to determine the insufficient water supply amount as a minute water supply. It is configured to replenish water by repeating measurement and adjust the amount of water.

The second means is configured such that when the water supply amount due to the water supply during the actual water supply time exceeds the permissible limit of the predetermined water supply amount, the water is temporarily drained by the drainage means and the water amount is adjusted again.

A third means sets a corrected actual water supply time which is shorter than the actual water supply time from the water supply rate calculated from the actual water supply time and the amount of water supplied by the water supply in the actual water supply time, and supplies water only for the corrected actual water supply time. After that, it is configured such that the amount of water is measured by a measuring means, and the shortage of water supply is supplemented by repeating small amount of water supply and measurement to adjust the amount of water.

In the first means of operation, the water supply for water adjustment is supplied for the actual water supply time that is less than the predetermined water supply amount, and the insufficient water supply amount measured by the measuring means is replenished by micro water supply and repeated measurement. Since the amount of water is adjusted by means of water, proper amount of water can be adjusted even if there are disturbance factors such as variations in water supply pressure.

In the second means, when the water supply amount by the water supply in the actual water supply time of the first means exceeds the allowable limit of the predetermined water supply amount,
Since the water is once drained by the draining means and the water content is adjusted again, even if the water content is unsuitable by the first means, the water content can be adjusted again by making the water content appropriate.

In the third means, the corrected actual water supply time shorter than the actual water supply time is calculated from the water supply of the actual water supply time in the second means, the corrected actual water supply time is supplied, and the insufficient water supply amount measured by the measuring means is calculated. Since water is added and replenished by repeating micro water supply and metering, it is possible to prevent inappropriate re-watering performed by the second means.

Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1, 2, and 3.

FIG. 1 shows the automatic rice-washing rice cooker of the present invention.
It is composed of 30 and a rice storing section 70 arranged below it.

In the rice cooking chamber 31, a heating element (not shown) serving as a heating means, or an outer peripheral heating coil 33 for induction heating and a central heating coil 34 for heating the central portion are provided on the periphery and bottom below the outer surface thereof.
However, the lid 35 is arranged on the upper part, and the rice cooking chamber lower members 36, 36a are arranged on the periphery and the lower part, respectively. Inside the rice cooking chamber 31 is a rice cooking pot 32
Is detachably stored.

An upper coupling 37 is fixed to approximately the center of the bottom surface of the rice cooking pot 32 and is detachably fitted to the lower coupling 37a.
The lower coupling 37a has a temperature sensor 37b, which is a temperature detecting means for detecting the temperature of the rice cooking pot 32, installed in a substantially central portion thereof so that the temperature sensor 37b can be raised and lowered. It is fixed to the upper end of a rotor 44 that is rotationally driven via a pulley 41, a transmission pin 42, and a transmission plate 43. The transmission pin 42 is integrally fixed to the transmission plate 43 and slidably fitted into a connection hole 46 provided in the large pulley 41 by a linear bearing 45. The rotor 44 is also held by a linear bearing 47 so as to be rotatable and slidable in the axial direction. As a result, the rotor 44, the transmission plate
43, the transmission pin 42, etc. are held slidably in the axial direction with respect to the large pulley 41, and a rice washing means for washing the rice in the rice cooking pot 32,
It constitutes a drainage means for draining the water in the rice cooking pot 32.

The rotor 44 is rotatably and axially slidably held by the linear bearing 47 as described above, and
A bearing 50 on a support plate 49 fixed to a load cell 48 using a strain gauge supports an axial load to form a weighing means for weighing the weight of the rice cooking pot 32.

The rice cooking pot 32 has a flange portion 53 that spreads outward at the upper opening thereof. The outer edge of this flange 53 is the rice cooking chamber.
It faces a drain 54 formed around the top of 31. Further, the opening of the rice cooking pot 32 is covered with an inner lid 55, and the inner lid 55 partially comes into contact with an extruding portion 56 formed on the periphery thereof so that a gap is partially formed.
It has 57 and is fitted to the rice cooking pot 32. The inner lid 55 is detachably held by the inner lid support pipe 59 at the center thereof via a flexible body 58 such as silicon rubber. The inner lid support pipe 59 is biased downward by a lid spring 60, and is rotatably held under the lid 62 via a closing pipe 61 having a valve 67 at the lower end. The lower lid 62 is integrally fixed to the lid 35. Also,
The lid 35 is pivotally attached to the outwardly extending portion of the heating chamber 31 via a hinge 63, and a steam port 64 is formed on the surface thereof. A water supply pipe 65 for supplying water to the rice cooking pot 32 faces the steam port 64 via the steam port 64. The water supply pipe 65 is connected to a water supply (not shown), a water supply pump, or the like via an electromagnetic valve 66, and constitutes water supply means for supplying water to the rice cooking pot 32.

The controller 68 controls the driving means 38 such as a motor, the heating means, the water supply means and the like by the signals from the measuring means and the temperature detecting means.

In the above structure, first, the steps from washing rice to cooking rice and keeping heat will be described with reference to FIG. In step 1, set the rice cooker 32 in the rice cooker 31 and
When 68 is operated, rice is transported to the rice cooking pot 32. Next, in step 2, the electromagnetic pipe 66 is opened for a certain period of time, and a certain amount of water is supplied from the water supply pipe 65 through the steam port 64 into the rice cooking pot 32. Then, in step 3, the driving means 38 such as a motor is intermittently energized. This will cook rice
In No. 32, rotation and stop are repeated intermittently, and rice washing is performed in the same manner as the conventional example. In step 4, following this washing, the driving means 38 such as a motor is continuously energized, and the rice cooker
Centrifugal drainage is performed by rotating 32 in a certain direction.

Washing rice is completed by repeating steps 2 to 4 as a series and repeating this step n times. Then, after the final drainage is completed, water is adjusted by supplying a predetermined amount of water (step 5), and rice is cooked (step 6) like the conventional electric rice cooker, followed by a heat retention step (step 7). Rice cooking work is completed.

Next, the operation of the water addition / reduction control means in the water addition / reduction described above will be described in detail with reference to FIG.

First, the first means shifts to the process of adding and removing water after the rice washing process n times, and first determines a predetermined water supply amount V ₀ corresponding to the amount of rice put in the rice cooking pot (step 8). Next, the water supply time T ₀ is calculated based on the water supply speed Q ₀ and the predetermined water supply amount (water addition / reduction amount) V ₀ obtained during the water supply in the rice washing process (step 9). The actual water supply time T ₁ is calculated by subtracting the risk time for avoiding the water supply amount exceeding the upper limit of the predetermined water supply amount in the water supply time T ₀ (step 10), and the actual water supply time T ₁
Water supply (step 11). When this water supply is completed, the water supply weight M ₀ is measured by the measuring means (step 11a). Then, replace this feed water weight M ₀ with the feed water weight M ₁ (step
11b), if the water supply weight M ₁ is less than the predetermined water volume V ₀ , a small amount of water is supplied, and the water supply weight M ₁ and the predetermined water volume measured again are measured.
By repeating the comparison with V ₀ , supplement the insufficient water supply,
When the amount of water supply reaches the allowable limit of the predetermined amount of water supply V ₀ , the rice cooking process is started (steps 12, 13, 14).

Since the amount of water addition or subtraction in cooking rice has a great influence on the completion of cooking such as the hardness of cooked rice, it is necessary to accurately measure the amount. However, according to the water addition / reduction control means of the present embodiment, first, the predetermined water supply amount V ₀ Supply less water, then repeat the measurement of water supply weight M ₁ and minute water supply to obtain the target water supply volume V ₀
Since it is possible to supply water in an amount within the allowable limit, there is an effect that it is possible to eliminate problems such as excessive or insufficient water supply.

However, even by the water supply control means described above, the water supply amount of the actual water supply time T ₁ may exceed the allowable limit of the target water supply amount V ₀ due to disturbance factors such as fluctuations in tap water pressure. In this case, by the second means, the supplied water is once drained by the draining means, and the water content is adjusted again from step 8 to step 14 described above to perform the water content adjustment again.

With this control, it is possible to adjust the water supply again, so even if there is a disturbance such as fluctuations in tap water pressure, the water supply will be excessive.
There is an effect that it is possible to eliminate problems such as an insufficient amount.

In the above-mentioned water addition / reduction, if water is supplied again for the actual water supply time T ₁ , the water supply amount will exceed the predetermined water supply amount V ₀ again beyond the allowable limit unless the disturbance is eliminated.

In order to eliminate such a problem, the water supply is controlled by the third means in the following water addition / reduction control.

When the drainage is completed (step 15), the corrected water supply speed Q ₁ is calculated from the actual water supply time T ₁ and the water supply weight M ₀ (step 16), and the water supply calculated from the corrected water supply speed Q ₁ and the predetermined water supply amount V ₀ The corrected actual water supply time T ₂ is set by subtracting the risk time from the time (step 17). When the corrected actual water supply time T ₂ is set, the corrected actual water supply time T _{2 is} supplied and when the water supply ends (step 1
8), Weigh the water supply weight M ₂ with the measuring means (step 1
9). If the water supply weight M ₂ is less than the predetermined water supply volume V ₀ (step 20), the insufficient water supply water supply is supplemented by repeatedly measuring a small amount of water supply and measuring the water supply weight M ₂ (step 21), and the water supply volume is set to the predetermined value. When the water supply amount V ₀ is within the allowable limit (Step 2
0) Move to the rice cooking process.

In this way, when water is added and adjusted again, water is supplied for the corrected actual water supply time T ₂ that is even shorter than the initial actual water supply time T _1, so that the amount of water within the allowable limit of the prescribed water supply amount V ₀ is adjusted by the water addition and adjustment again. There is an effect that it is possible to supply water, and it is possible to eliminate problems such as excessive and insufficient water supply.

EFFECTS OF THE INVENTION As is apparent from the above description of the embodiments, according to the present invention, the first means is used to supply water for the amount of water supply for the actual water supply time so that the amount of water supply is less than the predetermined water supply amount. Since the insufficient water supply amount measured by the measuring means is supplemented by repeating the minute water supply and the measurement to adjust the water amount, it is possible to perform the appropriate water amount adjustment even if there are disturbance factors such as variations in the water supply pressure.

Further, when the amount of water supplied by the water supply in the actual water supply time of the first means exceeds the allowable limit of the predetermined water supply amount by the second means, the water is once drained by the draining means and water is added and adjusted again. Even if the water content becomes inappropriate by the means, the water content can be adjusted again by adjusting the water content again.

Further, according to the third means, the corrected actual water supply time shorter than the actual water supply time is calculated from the water supply of the actual water supply time in the second means, and the corrected actual water supply time is supplied, and the measuring means measures. Since the insufficient water supply amount is supplemented by repeating the minute water supply and the measurement to adjust the water amount, it is possible to prevent the water amount adjustment performed again by the second means from becoming inappropriate.

As described above, adjust the water content during cooking properly, and when the water content becomes incorrect due to disturbance, add water again to adjust the water content appropriately, and then add water again. It is possible to provide an automatic rice-washing rice cooker with stable rice-cooking characteristics, which can prevent the water content from becoming inappropriate.

[Brief description of drawings]

FIG. 1 is a side sectional view of an automatic rice-washing rice cooker according to an embodiment of the present invention, FIG. 2 is a flowchart showing all steps of the automatic rice-washing rice cooker, and FIG. The flow chart shown in FIG. 4 is a side sectional view of the main part of the conventional automatic rice-washing rice cooker. 32 …… rice cooker, 33, 34 …… heating coil (heating means), 37,
37a …… Coupling (washing rice, draining means), 37b …… Temperature sensor (temperature detecting means), 38 …… Drive means (washing rice, draining means), 44 …… Rotor (rice washing, draining means, measuring means), 48 …… Load cell (metering means), 65 …… Water supply pipe (water supply means), 66 …… Electromagnetic valve (water supply means), 68…
... Controller (water addition control means).

Claims (3)

[Claims] 1. A removable rice cooker, heating means for heating the rice cooker, temperature detecting means for detecting the temperature of the rice cooker, water supply means for supplying water to the rice cooker, and the inside of the rice cooker. Rice washing means for washing rice, drainage means for draining the water in the rice cooking pot, weighing means for weighing the weight of the rice cooking pot, and rice washing steps of water supply, rice washing, and drainage are repeated several times, and then water is added and removed. And a water addition control means for setting the actual water supply time shorter than the water supply time calculated from the predetermined water supply amount and the water supply speed, and after the water supply for the actual water supply time, the measurement is performed. An automatic rice-washing rice cooker that measures by means and supplements the insufficient water supply by repeating minute water supply and metering to adjust the water content. 2. The automatic rice-washing rice cooker according to claim 1, wherein when the amount of water supplied during actual water supply exceeds the allowable limit of the predetermined amount of water, the water is temporarily drained by the draining means and the water content is adjusted again. 3. A corrected actual water supply time which is shorter than the actual water supply time is set from the water supply rate calculated from the actual water supply time and the amount of water supplied by the water supply of the actual water supply time, and water is supplied for the corrected actual water supply time. 3. The automatic rice-washing rice cooker according to claim 2, wherein after that, the amount is adjusted by a measuring means, and the insufficient water supply amount is replenished by repeating minute water supply and measurement to adjust the water content.