JPH064854Y2 - rice cooker - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial field of application) The present invention relates to a rice cooker that includes a heater for heating a rice cooking container and controls the input of the heater to cook rice.

(Prior Art) In recent years, in this type of rice cooker, the input of the heater is controlled by an electronic circuit to prepare a menu of rice such as white rice, brown rice, cooked rice, rice porridge, or a course of main cooked rice and fast cooked rice. It is becoming possible to choose.

A general structure of such a rice cooker is shown in FIG. 10, 1 is a main body having an inner case 2 and an outer case 3, 4 is a lid, and 5 is a container for rice cooked in the inner case 2. , 6 is a rice cooking heater provided on the bottom of the inner case 2, 7 is a heat retaining heater provided on the side surface of the inner case 2 and the inner surface of the lid 4,
Reference numeral 8 denotes a cup-shaped heat-sensing portion provided so as to elastically contact the outer bottom portion of the container 5, and a temperature sensor 9 for detecting the temperature of the container 5 is provided inside. Reference numeral 10 is an electronic circuit unit that controls the inputs of the rice cooking heater 6 and the warming heater 7 based on the temperature detection information from the temperature sensor 9 and the like.
It is provided on the bottom of the outer case 3. A container 5 is removably housed in the inner case 2, and an upper opening of the container 5 is closed by a lid 4.

Then, for example, when the main rice is cooked and cooked, the container 5 is taken out from the inner case 2, a required amount of washed white rice and a predetermined amount of water corresponding to the amount of the polished rice are stored in the container 5, and After that, the container 5 is inserted into the inner case 2, the opening is closed by the lid 4, and in this state, a start switch (not shown) is turned on manually or by a timer. In response to this, the input to the rice cooking heater 6 is the electronic circuit unit 10
The rice is cooked through a predetermined process shown in FIG.

FIG. 11 shows the relationship between the temperature change of the container 5 with the passage of time and the input state of the rice cooking heater 6. First, hot water cooking is performed for 15 minutes according to the turning on of the start switch. In this hot water cooking process, 100% (for example, 1000W) is input to the rice cooking heater 6 to turn it ON-OFF-ON.
The -OFF control is performed for 15 minutes, and the water in the container 5 is heated to an appropriate temperature by such control, and the water permeates into the rice grains sufficiently.

After such hot water cooking is performed, a substantial rice cooking process is started. First, the rice cooking heater 6 is energized with 100% input. Due to this energization, the temperature of the container 5 gradually rises, and the amount of rice in the container 5 is detected in the middle thereof, that is, while the temperature of the container 5 rises from 70 ° C to 80 ° C. This rice amount detection is the time T required for the temperature of the container 5 to rise from 70 ° C to 80 ° C.
Calculated from. That is, when the amount of rice is large, the time T becomes long, so for example, when T <55 ″, a small amount, T ≧
When it is 55 ″, it is judged as a large amount.

The boiling detection is started when the temperature of the container 5 reaches a predetermined temperature, for example, 94 ° C. This boiling detection is performed by utilizing the fact that when the water in the container 5 starts to boil, the temperature rise of the container 5 is suppressed by the latent heat of vaporization. That is, when the amount of rice is small from the time when the temperature of the container 5 reaches 94 ° C, 60 ″, and when the amount of rice is large, 2′20 ″, the temperature rise of the container 5 is 5deg or less. The state is detected, and it is determined that the water in the container 5 has boiled based on this detection.

After such boiling detection is performed, the rice cooker 6
On the other hand, for example, the control of 50% (500 W) input is performed, whereby the boiling of water in the container 5 continues stably.

Due to the continuation of such boiling, the water content in the container 5 decreases,
The rice cooking process is completed when the temperature rise of the container 5 starts again and reaches 120 ° C.

After such a rice cooking process, the 15-minute Murashi process is started. This steaming process is for the rice cooker 6
OFF-ON-OFF-ON-OFF- with 100% input
The ON-OFF control is performed for 15 minutes, and by such control, the container 5 is maintained at a temperature almost equal to that when water is boiling, and the rice in the inside is uneven.

Further, after the purging process, the heat is maintained by the heat-retaining heater 7.

In this way, in the case of white rice cooking, according to a predetermined program, first a hot water cooking process of 15 minutes is carried out, then the rice cooking process is started, and after the rice cooking process is completed, a 15 minute steaming process is carried out and the process of heat retention is carried out. Similarly, brown rice, cooked rice, rice porridge, etc. are all cooked according to a predetermined program, after a certain time of the hot water cooking process, the rice cooking process, and the certain time of the murashi process. It was

(Problems to be Solved by the Invention) In the above-mentioned conventional technology, since the hot water cooking process and the Murashi process are performed in a preprogrammed fixed time, for example, 15 minutes, normal rice cooked with standard rice is used. There is no problem when carrying out, but for example, when the user does the hot water himself, the rice becomes too hot, and when rice other than standard rice is used, appropriate hot water cooked according to the type of rice,
I can't make a spot. In addition, it is not possible to adjust the softness or hardness to suit the taste of the user, and in the case of fast-cooking rice, delicious rice is cooked for a predetermined fixed time in the hot water cooking process or the Murashi process. There were problems such as not being able to obtain it.

Therefore, an object of the present invention is to provide a rice cooker in which the hot water cooking stroke time and the purple rice cooking time can be selected.

[Structure of the Invention] (Means for Solving the Problems) The present invention is a container 5 for cooking rice, a rice cooking heater 6 and a heater 7 for heating the container 5, and a temperature detecting means for detecting the temperature of the container 5. A control means 31 for controlling the inputs to the heaters 6 and 7 according to the temperature of the container 5, a clocking means 33, a hot water cooking time setting means 27, a hot water cooking time display means 15, and an even time setting. A means 28 and a time duration display means 16 are provided, and the control means 31 operates according to the setting of the hot water cooking time by the hot water cooking time setting means 27 to start the timekeeping operation at the start time of the hot water cooking process and set time. The hot water cooking control means for executing the rice cooking process after the lapse of time, and the setting of the mudling time by the muddle time setting device 28 activates the timekeeping operation at the start of the nonuniform heating process and executes the heat retention process after the lapse of the set time. Rashi and a control unit.

(Operation) The hot water cooking control means operates when the hot water cooking time is set by the hot water cooking time setting means 27, displays this set time on the hot water cooking time display means 15, and measures the time of the time measuring means at the start of the hot water cooking process. When the operation is started and the set time is, for example, 12 minutes, the hot water cooking process is completed and the rice cooking process is performed when the timed time reaches 12 minutes. Further, the unevenness control means operates when the unevenness time is set by the unevenness time setting means 28, displays the set time on the unevenness time display means 16, and causes the timing operation of the timekeeping means at the start of the unevenness stroke. Start and set time eg
In the case of 12 minutes, when the clock time reaches 12 minutes, the purging stroke is completed and the heat retaining stroke is executed.

Embodiment An embodiment of the present invention will be described below with reference to the accompanying drawings. Since the whole structure of the rice cooker is the same as that shown in FIG. 10, its explanation is omitted. The same parts will be described below with the same reference numerals.

FIG. 2 shows an operation panel 11 provided on the main body 1 or the lid 4 and having a display section and operation switches. Reference numeral 12 is an LCD display section. The display section 12 has a 4-digit 7-segment type. Time display section for current time composed of LCD
13 and a time display section 14 for cooking time, and a hitoshi cooking time display means 15 and a Murashi time display means 16 composed of a 2-digit 7-segment LCD, white rice cook, cook, brown rice cook, porridge cook Course display section that displays the course
17 and a quick cooking display unit 18 are provided, and the course display unit 17 lights a frame 19 surrounding the selected character. Further, a mode display unit 20 composed of three LEDs is provided on the upper portion of the display unit 12 and displays the mode being processed among cooked rice, heat retention, and timer cooked rice. An operating unit 21 is provided below the display unit 12, and the operating unit 21 includes a time setting switch 22, a rice cooking menu selection switch 23, a cancel switch 24, a start switch 25, a timer switch 26 including a pulse switch, and a pulse switch. The hot water cooking time setting means 27 and the uneven time setting means 28 are provided. Each time the rice cooker menu selection switch 23 is pressed, the white rice cooker, rice cooker, brown rice cooker, and porridge rice cooker are sequentially set by turning on the frame 19 that surrounds each course. The current time is adjusted by pressing the clock setting switch, and the timer switch By turning 26, the cooking time is set,
When the start switch 25 is pressed once, the main cooked rice is set, when the timer is set, the timer cooked rice is set, and when the start switch 25 is pressed twice, the cooked cooked rice is set. When the quick cooked rice is set, the setting of the hot water cooking time and the setting of the uneven cooking time become invalid. By rotating the hot water cooking time setting means 27, the hot water cooking time is set in the range of 5 minutes to 15 minutes, and by rotating the hot water cooking time setting means 28, the hot water cooking time is set in the range of 0 minute to 15 minutes. Time is set. When the cancel switch 24 is pressed, all the operations are canceled.

FIG. 1 is a block diagram, and 29 is an A / D converter that constitutes a temperature detecting means 30 together with the temperature sensor 9 and outputs a signal according to the detected temperature. 31 is the electronic circuit unit
As is well known, the CPU 32, the clocking means 33, and the memory are control means including a microcomputer that constitutes the 10.
34, an input circuit 35, an output circuit 36, etc., and the signal from the operation unit 21 and the signal of the detected temperature of the container 5 are input to the CPU 32 via the input circuit 35, and output from the CPU 32 via the output circuit 36. Drive circuit 37 based on the generated control signal
The heaters 6 and 7 are driven and controlled by the display drive circuit 38, and the display unit 12 and the LED which are LCDs.
The mode display unit 20 consisting of is driven and controlled. Further, the control means 31 has a plurality of types of programs, and controls the driving of the rice cooking heater 6 in accordance with a rice cooking menu selected according to the programs held by the program, main cooking, or quick cooking. Further, the control means 31 operates when the hot water cooking time is set by the hot water cooking time setting means 27, displays this set time on the hot water cooking time display means 15, and at the start of the hot water cooking process, that is, at the time of starting the rice cooking, The timekeeping operation is started, and it is comparatively judged whether or not the set time has reached the set hot water cooking time, and when the time is reached, it has a hot water cooking control means, and further, the control means 31 has a uniform time. It operates when the setting time is set by the setting means 28, and this setting time is displayed on the turning time display means 16, and the timing operation of the time measuring means 33 is started at the start of the unevenness stroke, that is, at the completion of the rice cooking step. It has a nonuniformity control means for carrying out a comparative determination as to whether or not the set time has reached the set nonuniformity time, and executing the heat retention step when the time reaches the set nonuniformity time.

The operation of the present invention configured as described above will be described with reference to FIGS.
It will be described with reference to the drawings.

When the start switch 25 is pressed once after the operation of the operation section 21, the control means 31 judges whether the hot water cooking time and the uneven time have been set as shown in FIG. According to a predetermined program, the general rice shown in Fig. 11 is cooked. When only the hot water cooking time is set, the hot water cooked control rice shown in Fig. 6 is carried out. When the Murashi control cooked rice shown in Fig. 7 is set, and when the hot water cooking time and the mudashi time are set, the hitashi cooked rice shown in Fig. 8 and the Murashi control cooked rice are carried out, and when the start switch 25 is pressed twice, Fig. 9 is obtained. Boil and cook rice as shown in.

The hot water cooking control rice (FIG. 6) will be described. In this case, the hot water cooking control means operates to perform the operation of FIG. That is, at the start of cooking rice, the time counting means 33 starts the time counting operation, and it is determined whether this time counting time has been set by the hot water cooking time setting means 27, for example, 12 minutes,
After 12 minutes, shift to the rice cooking process, and cook rice similar to that in Fig. 11,
Pursue and carry out the heat retention process in sequence.

The Murashi control rice cooking (FIG. 7) will be described. In this case, the Murashi control means operates to perform the operation of FIG. That is, the timing operation is started at the start of the spotting operation, which is the completion of the rice cooking process shown in FIG. 11, and it is determined whether the time set by the spotting time setting means 28, for example, 12 minutes has elapsed, After the lapse of minutes, the heat insulation process is started.

Regarding the hot water cooking and Murashi controlled rice cooking (Fig. 8), in this case, the hot water cooking control means of Fig. 4 and the Murashi control means of Fig. 5 are activated, and the 12 minute hot water cooking process and rice cooking process are performed. , The 12-minute Murashishi process and the Insulation process are sequentially executed.

Speaking of quick cooked rice (Fig. 9), in this case, even if the setting of the hot water cooking time and the time of the unevenness is invalidated, the rice cooking process, the 5 minutes of the uneven cleaning process, and the heat retention process are started by starting the rice cooking. It is executed sequentially.

As described above, in this embodiment, since the time of the hot water cooking process and the time of the purple process can be freely set, for example, when the user makes the hot water by himself, the hot water cooking process is performed. For example, by setting the time to 5 minutes, it is possible to prevent too much hot water, and it is possible to set an appropriate hot water cooking time in consideration of the experience of the user when using rice other than standard rice or according to the water temperature. In addition, by selecting the time of the spots, it is possible to adjust the cooked state such as softness and firmness to suit your taste, and it can also be applied to cooking pasta. Also, the rice cooking time can be extended by lengthening the hot water cooking time and the steaming time, and the rice cooking time can be shortened by shortening it conversely, so that the rice cooking time can be adjusted and the hot water cooking can be adjusted to your preference. Can be made longer and the other can be shortened, and by setting the hot water cooking and the purple food to be short, it is possible to cook rice just like cooking while performing the hot water cooking process and the purple process so that delicious rice can be quickly cooked.

The present invention is not limited to the above embodiment, and various modifications can be made within the scope of the present invention. For example, the setting ranges of the hot water cooking time and the mudling time can be appropriately selected, and the hot water cooking time display means and the mudling time display means may be shared by one display means.
Also, the hot water cooking time setting means and the even time setting means are 1
It is composed of one set time switch and one set time switch, and one set time switch can be used to set the set time when the set is selected. The time may be settable.

[Effects of the Invention] The present invention is a hot water cooking control means for executing the hot water cooking process of the time set by the hot water cooking time setting device, and a mudling control for executing the time uneven cooking process of the time setting device. By providing the means, it is possible to provide a rice cooker in which the hot water cooking stroke time and the purple rice cooking time can be freely set, and rice can be cooked according to the type of rice, the taste of rice, and the like.

[Brief description of drawings]

1 to 9 show an embodiment of the present invention, FIG. 1 is a block diagram, FIG. 2 is a front view of an operation panel, FIG. 3 is a flow chart showing the main cooked rice, and FIG. FIG. 5 is a flow chart showing the operation of the cooking control means, FIG. 5 is a flow chart showing the operation of the Murashi control means, FIG. 6 is a graph showing the process of hitoshi control rice, and FIG. 7 is a graph showing the process of Murashi control rice. , Fig. 8 is a graph showing the process of hitoshi rice cooking and Murashi control rice, Fig. 9 is a graph showing the process of quick rice cooking, Fig. 10 is a general sectional view of a general rice cooker, and Fig. 11 is It is a graph which shows the process at the time of cooking standard rice. 5 ... Container 6 ... Rice heating heater 7 ... Insulation heater 15 ... Hot water cooking time display means 16 ... Mourning time display means 27 ... Hot water cooking time setting means 28 ... Mourning time setting means 30 ... Temperature Detecting means 31 …… Control means (Hitashi cooking control means) (Murashi control means) 33 …… Timekeeping means

Claims (1)

[Scope of utility model registration request] 1. A container for cooking rice, a heater for heating the container, a temperature detecting means for detecting the temperature of the container, a control means for controlling an input to the heater according to the temperature of the container, and a timekeeping device. Means, hot water cooking time setting means,
Hot water cooking time display means, Murashi time setting means, Murashi time display means, and the time setting of the hot water cooking time setting means operates to start the clock operation at the start of the hot water cooking process, and after the set time has passed, the rice cooking process And a nonuniformity control means that operates according to the time setting of the nonuniformity time setting means, starts a timing operation at the start of the nonuniformity stroke, and executes a heat retention step after the set time has elapsed. Rice cooker characterized by.