JPH09252947A - Electric rice boiler - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable boiled rice to be scorched by providing a means for selecting a boiled rice scorching function and setting the rice boiler heating temperature of a boiled rice heating means higher than that in the usual rice boiling to set the boiled rice scorching function in the start of rice boiling. SOLUTION: When in an operating panel part 100 a slide-type operating knob 116a of a scorching switch 116 is set to 'usual', plump rice without scorch is boiled up by a usual rice boiling function. On the other hand, when the same operating knob 116 is set to 'scorch', a scorch memory can be set at will to the boiled rice scorching function of scorching the boiled-up rice. That is, a microcomputer control unit judges whether or not the scorching memory is set in a boiling-up process. In the case of YES, the micon control unit judged whether or not the boiling temperature reaches higher than the boiling-up completing temperature 140 deg.C which is 10 deg.C higher than the rice boiling completing temperature 130 deg.C. When the result shows YES, the completion of boiling-up is recognized, the rice boiling is shifted to the next steaming process and further to a temperature retaining process.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric rice cooker having a burnt rice cooking function.

[0002]

2. Description of the Related Art In a conventional electric rice cooker having a follow-up cooker switch, for example, by turning on the cooker cooker after completion of the cook-up cooker, additional cook-up heat is performed for a predetermined time to meet the user's preference. It was possible to add some charring.

[0003]

However, in the recent electronically controlled electric rice cookers, all heating amount control in the rice cooking process is automatically performed, and the additional cooker function is completely provided. Absent. Therefore, it is impossible to cook rice that tends to be burnt at the discretion of the user.

The present invention has been made under such circumstances, and is a so-called electronically controlled electric rice cooker in which the heating pattern of the rice cooking process is automatically controlled by the heating control means. It is intended to provide an electric rice cooker capable of cooking rice by setting a charcoal rice cooking function at the start.

[0005]

In order to achieve the above object, the present invention is provided with the following effective problem solving means.

That is, the electric rice cooker of the present invention uses the rice cooking heating means for heating the rice cooker containing rice and water, the temperature sensor for detecting the temperature of the rice cooker, and the temperature detection value of the temperature sensor. An electric rice cooker comprising heating control means for controlling heating of the above-mentioned rice cooking heating means according to a predetermined rice cooking characteristic, in which a burnt rice cooking function selecting means is provided, and the burnt rice cooking function selecting means burns rice cooking function. When is selected, the rice cooker heating temperature of the rice cooking heating means controlled by the heating control means is set higher than that during normal rice cooking.

Therefore, when the user operates the burnt rice cooking function selecting means, the burnt rice cooking function is selected. Then, as a result, the rice cooker heating temperature of the cooked rice heating means controlled by the heating control means is, for example, one of the steps of the cooking step and the mulling step, or the heating temperature during normal rice cooking in both steps. The rice is cooked to a high level and is charred.

Further, the heating temperature of the rice cooker set high in the cooking step is particularly effective by making the temperature at the completion of cooking higher than that at the time of normal cooking and maintaining it for a predetermined time. It is made to form a char.

[0009]

As a result of the above, according to the electric rice cooker of the present invention, it is possible to add an appropriate charcoal rice cooking function even to a so-called recent microcomputer-controlled electric rice cooker, so that various kinds of cooking can be performed by users. It is possible to meet the demand for functions.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION

(Basic Configuration of Electric Rice Cooker Main Body and Control Circuit Section) FIGS. 1 to 4 show the configuration of the electric rice cooker main body and its control circuit section common to Embodiments 1 to 3 of the present invention described later. .

First, the electric rice cooker is of an electromagnetic induction heating type having a work coil, for example. In addition, cooking rice and heat retention are also used.

That is, the electric rice cooker body 1 is, for example, as shown in FIGS. 1 and 2, a rice cooker made of an iron-based metal such as stainless steel capable of self-heating by an eddy current induced inside ( A rice cooker 2), a synthetic resin bottomed cylindrical inner case (protective frame) 3 formed so that the rice cooker 2 can be arbitrarily set, and an outer housing for holding the inner case 3. Cylindrical outer case 4, outer case 4 and inner case 3
And a lid unit 5 that is openably and closably provided on the upper part of the container body formed integrally.

The bottom surface 3a of the inner case 3 and the side surface 3b.
As shown in the figure, the outer surface has two sets of first and second work coils C connected in series to each other by concentric first and second ribs 91 and 92 having different radial positions. ₁ ,
C ₂ is constructed so that it can be fitted at a predetermined interval, and the first and second work coils C ₁ and C ₂ are arranged in the radial direction via the first and second ribs 91 and 92. The bottom surface 3a on the inner side and the outer surface of the side portion 3b on the outer side are joined and fixed to the fitting surfaces via adhesives.

Therefore, in this construction, the rice cooker 2 uniformly generates heat on both the bottom 2a side and the side 2c side, and cooks cooked rice efficiently without uneven heating.

The outer case 4 is composed of, for example, a synthetic resin plate and has a vertically cylindrical cover portion 4a, and a synthetic resin shoulder portion 4b connected to an upper end portion of the cover portion 4a.
A cylindrical body having a bottom as a whole in a state where a space portion 6 having a predetermined width is formed between the bottom portion 3a of the inner case 3 and a bottom portion 4c made of a synthetic resin joined to the lower end portion of the cover portion 4a. Is configured. The inner case 3 made of the synthetic resin and having the same bottomed cylindrical structure for supporting the rice cooker 2 to be freely taken out as described above is supported on the inner upper part thereof.

A bottom surface is provided at a portion between the first and second ribs 91 and 92 for partitioning the inner and outer first and second work coils C ₁ and C _{2 on the} outer peripheral portion of the bottom portion 3a of the inner case 3. A thin portion 30 that is a concave portion is formed on the side, and the lower surface side of the thin portion 30 is a microcomputer for cooking rice, which includes the first and second work coils C ₁ and C ₂ and a microcomputer during abnormal heating. A thermal fuse 15 is provided for shutting off power to the control unit (see reference numeral 61 in FIG. 4, which will be described later).
The inner and outer first and second work coils C ₁ and C 2 are formed on the lower surface of the bottom portion 3a and the outer surface of the side portion 3b of the inner case 3 as described above.
C ₂ is provided, and a coil base 8 is provided below them.

An operation panel section 100 is provided on the front side of the cover section 4a of the outer case 4, and an operation board 101 provided with the microcomputer control unit (see reference numeral 61 in FIG. 4) and the like is provided on the back side thereof. Has been.

The operation panel section 100 is provided with various operation switches and a display section for displaying a setting state set by the various switches as shown in FIG. 3, for example.

That is, reference numeral 111 is a menu switch for designating a rice cooking menu (for example, white rice, early cooked rice, fresh rice, sushi, cooked rice, cooked rice, brown rice, porridge, etc.),
112 is a rice cooking start switch, 113 is a heat retention switch, 114 is a timer switch, and 114a is timer 1.
14 time setting switch, 114b timer 114
Time setting switch 115, cancel switch 116
Is a burnt rice function selection switch (hereinafter, simply referred to as a burnt switch), 116a is an operation knob thereof, 117 is a liquid crystal display portion, 119 is a display time, 118 is white rice, early cooking,
New rice menu display 118a is a display index which is arbitrarily moved and displayed on the liquid crystal display 117 side in accordance with the menu.

For example, when the slide type operation knob 116a is set to "normal", the scorching switch 116 has a normal rice-cooking function to cook non-scorched rice fluffyly while the other operation knob 116a is set to "scorch". ", The charring memory is set, and you can optionally set the charring rice function to cook charred rice that matches the taste of the user. Then, when the latter charred rice cooking function is selected and set, the charred rice cooking program according to any one of Embodiments 1 to 3 described later provided on the control unit 61 side is arbitrarily selected to obtain a desired charred rice. The rice cooking control is executed.

On the lower part of the coil base 8, ON / OFF control of the inner and outer first and second work coils C ₁ and C ₂ is performed by a microcomputer control unit composed of the microcomputer on the operation board 101 side. A control board 36 having a work coil control circuit (see FIG. 4) for performing (output control) is provided.

By the way, the coil base 8 has, for example, an inner case supporting surface having a saucer shape extending radially in the radial direction as a whole, and has the inner and outer first and second work coils C ₁ and C _2.
Rib-shaped work coil supporting portions 8a, 8a
., And the ferrite core fitting grooves 9, 9 formed between the work coil supporting portions 8a, 8a ... And the leg portion 1 provided on the lower side of the work coil supporting portions 8a, 8a.
0, 10 ... And the above-mentioned leg portion 10, 10
.. is supported on the bottom portion 4c of the outer case 4. The work coil supporting portions 8a, 8 of the coil base 8
On the side outer peripheral surface of a ..., a pair of spacers 11, 11 having a vertical wall structure, which are located on both sides of one end (radial outer end) of the ferrite core fitting groove 9, 9 ,. Are provided, and the outer second work coil C is provided around the outer periphery of the spacers 11 and 11 with a predetermined space therebetween.
A ring-shaped magnetic shield plate 12 for shielding the magnetism from ₂ is fitted and fixed from the lower side.

Further, the ferrite core insertion grooves 9, 9,.
The ferrite cores 13 and 13 are formed, for example, so as to extend in the radial direction at intervals of 90 degrees in the circumferential direction, and penetrate vertically, and at predetermined intervals in the radial direction. Is fitted.

Further, an opening 80 having a predetermined diameter, for example, is formed in a portion of the coil base 8 corresponding to the thin portion 30 of the inner case bottom portion 3a described above.
, Which is upright above the work coil supporting portions 8a, 8a ...
Is detachably attached to the bottom 3 of the inner case 3 by the temperature fuse holder 14 and the cylindrical temperature fuse 15 contained in an insulating tube, for example.
It is supported in contact with the lower surface 30a of the thin portion 30 of a.

That is, the thermal fuse holder 14 has a H-shaped cross section, and the thermal fuse 1 is placed in the recess 14a at the upper end of the holder portion.
5 and a part of the lower side wall is bent outward in the horizontal direction to attach it to the lower surface of the coil base 8.
b is formed, and the mounting portion 14b is fastened to the lower surface of the coil base 8 with a screw 81 so that the mounting portion 14b is detachably fixed from the lower side.

On the other hand, the inner case 3 is integrally formed with a bottom portion 3a and a side wall portion 3b. The center portion of the bottom portion 3a and the work coil supporting portions 8a, 8a of the coil base 8 ... An accommodating space portion (fitting hole) 17 for the center sensor 16 penetrating vertically in a concentric manner is formed,
A center sensor 22 for detecting the set state of the rice cooker is provided in the center sensor housing space 17 in a vertically movable state and constantly urged upward by a coil spring 18.

The center sensor accommodating space 17 is formed in a cylindrical body 19 formed by ribs extending vertically in the central portion of the coil base 8, and a sensor cover 20 is fitted into the lower opening thereof. The screws 21 are fixed to the pressure wall portion on one side of the coil base 8 side tubular body 19 with screws 21.

In the case of the present embodiment, for example, the center sensor 22 is not provided with a large-diameter temperature fuse for detecting an abnormal temperature in the sensor holding portion 94 at the upper end inside the cylindrical sensor holder, Only a thermistor (temperature sensor) 23a for detecting the temperature of the rice cooker 2 which is considerably smaller than the temperature fuse is provided in the central portion, and on the upper surface of the sensor holding portion 94 at the upper end portion of the sensor holder. A sensor cap 25 made of a metal material having a small diameter and good thermal conductivity, which is sufficient to cover the small-diameter sensor holding portion 94 provided with only the thermistor 23a, is integrally fixed. A ring-shaped shield member 93 provided with a shield lip portion 93a in the circumferential direction is fitted to the lower portion of the upper side edge portion 26 of the cylindrical sensor holder, and the shield member 93 and the lower sensor cover 20 are fitted together. The coil spring 18 interposed between the sensor holder and the cover surface 27 supports the entire sensor holder in a state of being vertically movable and always urged upward.

The lower portion of the sensor holding portion 94 in the sensor holder extends downward by a predetermined length in a rectangular tube shape to form a reed switch mounting portion at the lower end, while the lower sensor cover 20 has a tubular magnet. A mounting portion 95 is formed. Then, the magnet 28 attached to the upper end of the magnet attaching portion 95 and the reed switch 29 attached to the reed switch attaching portion are brought into contact with and separated from each other according to the ascending / descending operation of the sensor holder, so that the reed switch 29 is removed. It is turned on and off, and the non-set and set states of the rice cooker 2 are detected by the ON and OFF signals.

The temperature of the rice cooker 2 is detected by the thermistor 23a.

Reference numeral 34 is a rising position regulating edge portion of the sensor holder of the inner case bottom portion 3a, and the edge portion 34 is erected at a predetermined height above the upper surface of the inner case bottom portion 3a to store the sensor. It is made difficult for water and the like to enter the space 17.

In the case of this embodiment, the rice cooker 2
Is supported by locking its upper edge portion 2b to the rice cooker support edge portion 83 inside the shoulder portion 4b of the outer case 4 via a heat resistant and high friction coefficient supporting member 84. There is.

On the other hand, the lid unit 5 has a synthetic resin outer cover 37 constituting the outer peripheral surface thereof, and the outer cover 37.
The rice cooker 2 of the lid unit 5 fitted inside the outer peripheral edge of the
Radiating plate 5 including an inner frame 38 made of a synthetic resin that constitutes an engaging portion to the inner frame 38, and a lid heater 72 fitted in the inner frame 38.
The outer cover 37 and the heat dissipation plate 57 are connected to each other at their outer peripheral edge portions via an inner frame portion 38. The lid unit 5 is rotatably attached to a shoulder 4b of the outer case 4 via a hinge mechanism 40, and has an open end engaged with a predetermined position of the lid unit 5. A lock lever 39 for opening and closing the lid unit 5 is provided.

Further, in the substantially central portion of the lid unit 5,
The vapor discharge port 43 is formed so as to penetrate vertically.
A rubber packing 45 is provided in the steam discharge port 43.
Are fitted, and the vapor discharge cylinder 44 is attached via the packing 45.

Next, FIG. 4 shows the construction of the work coil control circuit section centering on the rice cooking microcomputer control unit 61 of the electric rice cooker configured as described above.

In the figure, reference numeral 61 is a microcomputer control unit (CPU) for controlling rice cooking provided on the operation board 101 on the back side of the front operation panel 100 of the outer case 4, and the microcomputer control unit 61 is a micro controller. The computer is mainly provided with a temperature detection circuit section, a work coil control circuit section, an oscillation circuit section, a reset circuit section, a power supply circuit section, a liquid crystal display section, an LED lamp display section, an operation switch section and the like.

First, for example, the detected value of the temperature of the rice cooker 2 (rice temperature) by the thermistor 23a is input to the temperature detection circuit 23.

The work coil control circuit section includes a pulse width modulation circuit 53, a synchronous trigger circuit 54, and an IGBT.
It is formed by the drive circuit 52, the IGBT 50, and the resonance capacitor 51. Then, by controlling the pulse width modulation circuit 53 by the microcomputer control unit 61, for example, according to the total number (rice cooking amount),
By changing the total output (output duty ratio) of the second work coils C ₁ and C ₂ , FIG. 6, FIG.
As shown in FIG. 10, the heating temperature of the rice cooker in each step of the rice cooking process is appropriately variably controlled during normal rice cooking and during scorching rice, so that the rice can be appropriately scorched according to the total number (rice cooking amount) as described later. Characteristic output control is performed to realize cooking of rice with rice.

Reference numeral D in the figure is a protection diode for the IGBT 50. Reference numeral 71 is a household AC
It is a power source side smoothing circuit for the first and second work coils C ₁ and C ₂ inserted between the power source 70 and the power source 70.

On the other hand, reference numeral 72 is the above-mentioned lid heater, and 73 is a cooling fan at the inner bottom portion of the outer case, which is ON / OFF driven by a triac drive circuit 76 via triacs 74 and 75, respectively. ON / OFF control of the lid heater 72 and the cooling fan 73 corresponding to the cooked state is performed by controlling the triac drive circuit 76 by the microcomputer control unit 61.

Further, reference numeral 77 is a step-down transformer, and 78 is a constant voltage power supply circuit, which forms a power supply circuit of the microcomputer control unit 61.

Further, reference numeral 117 indicates the above-mentioned liquid crystal display section,
Reference numeral 63 is an LED lamp section for performing various displays such as rice cooking display, heat retention display, reservation display, and timer display, and 64 is the rice cooking start switch 112, heat retention switch 113, timer switch 114, cancel switch 115, scorching switch 116, etc. Various operation switch parts, 65 is a control oscillation circuit, and 79 is a reset circuit.

(Embodiment 1) FIGS. 5 and 6 are flow charts showing the contents of the burnt rice control according to Embodiment 1 of the present invention which is carried out in the electric rice cooker having the configuration shown in FIGS. And a time chart.

The burnt rice control of the present embodiment is performed by setting the heating temperature of the rice cooker in the cooking process in the rice cooking process, in particular, the heating temperature of the rice cooker at the completion of the cooking higher than the heating temperature of the normal rice cooking. It is characterized by being able to cook cooked rice.

That is, first, in step S ₁ , the operation data of each operation switch described above is input, and then in step S ₂ , it is determined whether or not the charring switch 116 is turned ON to the "burning" side. Yes, YES (ON on the burnt side)
The liquid crystal display unit 117 in step S ₄ is on set with browning memory described above in Step S ₃ proceeds in the cooker when
Is displayed on the screen (see FIG. 3). Then, after that, the process further proceeds to step S _5, and it is determined whether or not the rice cooking start switch 112 has been turned ON.

[0046] On the other hand, when the NO browned switch 116 is determined in the step S ₂ is not turned ON in the "brown" side, the process proceeds to step S _5.

When the determination in step S ₅ is YES, that is, when the rice cooking start switch 112 is turned on, the work coils C ₁ and C ₂ are turned on at a predetermined low output to raise the rice cooker temperature to the water absorption temperature for a predetermined time. The water absorption step of step S ₆ is executed.

After that, when the water absorption time has elapsed and the water absorption process is completed, the outputs of the work coils C ₁ and C ₂ are maximized to quickly raise the temperature of the rice cooker, and first, in step S ₇ , the sum is judged. To do. Then, upon reaching the boiling temperature, to perform a cook-up process in step S _8. Then, in該炊-out raised step determines whether browning memory in step S ₃ is set in step S _9. As a result, when the NO browning memory is not set, the routine proceeds to step S _10, determines whether the temperature of the rice unit 2 becomes normal (ordinary) during cooking cook-up completion temperature 130 ° C. or higher On the other hand, when the burning memory is set to YES, the process proceeds to step S ₁₁ and the cooking completion temperature 140 ° C. which is 10 ° C. higher than the rice cooking completion temperature 130 ° C. in the normal rice cooking.
It is determined whether or not the above.

As a result of these, if each result is YES,
Cook up, considered completed, the process proceeds to the next step S ₁₂ Nomura said step, through the further the steaming process proceeds to incubating process of step S _13.

As described above, in the burnt rice control of the present embodiment, the cooking completion temperature (cooking completion determination temperature) in the cooking process when selecting the cooked rice is the cooking completion determination temperature during normal cooking. It is set 10 ° C higher than that.

Therefore, the heating temperature and heating time of the rice cooker at the final stage of the cooking process are necessarily higher and longer than those during normal rice cooking, as shown in FIG. 6, for example, so that the rice can be surely cooked in a charred state. become.

Moreover, as described above, in the electric rice cooker main body of the present embodiment, the work coils C ₁ and C ₂ are divided and arranged in the inner and outer two directions of the bottom 2a of the circular rice cooker type rice cooker. Since the outer work coil C ₂ corresponds to the side surface portion 2c of the rice cooker 2, the entire cooked rice in the rice cooker 2 is evenly charred.

(Second Embodiment) FIGS. 7 and 8 are flow charts showing the contents of the burnt rice control according to the second embodiment of the present invention, which is carried out in the electric rice cooker having the configuration shown in FIGS. And a time chart.

In the burnt rice control of the present embodiment, the heating temperature of the rice cooker in the cooking process in the rice cooking process, particularly the heating temperature of the rice cooker at the completion of the cooking, is the same as in the first embodiment. By setting the temperature higher than the heating temperature and maintaining the state for a predetermined period of time, it is possible to more effectively burn the cooked rice.

That is, first, in step S ₁ , the operation data of each operation switch described above is input, and then in step S ₂ , it is determined whether or not the burnt switch 116 is turned on to the "burnt" side. Yes, YES (ON on the burnt side)
The liquid crystal display unit 117 in step S ₄ is on set with browning memory described above in Step S ₃ proceeds in the cooker when
Is displayed on the screen (see FIG. 3). Then, after that, the process further proceeds to step S _5, and it is determined whether or not the rice cooking start switch 112 has been turned ON.

On the other hand, when it is determined in step S ₂ that the NO burn switch 116 is not turned on to the “burn” side, the process directly proceeds to step S ₅ .

When the result of the determination in step S ₅ is YES, that is, when the rice cooking start switch 112 is turned on, the work coils C ₁ and C ₂ are turned on at a predetermined low output to raise the rice cooker temperature to the water absorption temperature for a predetermined time. The water absorption step of step S ₆ is executed.

After that, when the water absorption process ends after the water absorption time has elapsed, the outputs of the work coils C ₁ and C ₂ are maximized to quickly raise the temperature of the rice cooker, and first, in step S ₇ , the sum is judged. To do. Then, upon reaching the boiling temperature, to perform a cook-up process in step S _8. Then, in該炊-out raised step determines whether browning memory in step S ₃ is set in step S _9. As a result, when the NO browning memory is not set, the routine proceeds to step S _10, determines whether the temperature of the rice unit 2 becomes normal (ordinary) during cooking cook-up completion temperature 130 ° C. or higher On the other hand, when the burning memory is set to YES, the process proceeds to step S ₁₁ and the cooking completion temperature 140 ° C. which is 10 ° C. higher than the rice cooking completion temperature 130 ° C. in the normal rice cooking.
It is determined whether or not the above.

[0059] These results, when the browning memory becomes YES in Step S ₁₀ if it is not set, acknowledges the completion raised cooking, proceed to the next step S ₁₆ Nomura said step, further the steaming step After that, the process proceeds to the heat retention process of step S ₁₇ .

[0060] On the other hand, when the browning memory becomes YES in the step S ₁₁ have been set, further proceeds to step S _12, becomes completion temperature 140 ° C. or more up cook higher than normal cooking It is determined whether or not a set time (for example, 5 minutes) for forming the charring has elapsed, and if NO is still within 5 minutes, the above 140 ° C. is again set in step S _13.
It is determined whether the temperature is above or below that. As a result, the rice cooker temperature is lower than 140 ℃ above N
When it is O, the work coils C ₁ and C ₂ are turned on in step S ₁₄ or the ON state is continued to maintain the cooking completion temperature 140 ° C. higher than usual. On the other hand, when the rice cooker temperature is higher than 140 ° C. and is YES, the work coils C ₁ and C ₂ are turned off in step S ₁₅ to lower the cooker temperature to 140 ° C. In this way, within the set time (5 minutes), the rice cooker temperature is controlled to a cooking completion temperature of 140 ° C., which is higher than that during normal rice cooking, and charring is effectively formed.

[0061] Then, after the lapse the set time (5 min) is equal to or YES in step S _12, the first step S
Proceed to ₁₆ Murashiri process.

As described above, in the burnt rice control of the present embodiment, the cooking completion temperature (cooking completion judgment temperature) in the cooking process when selecting the cooked rice is higher than the cooking completion temperature during normal cooking. Is also set to be higher by 10 ° C. and maintained for a predetermined set time of 5 minutes.

Therefore, the heating temperature and heating time of the rice cooker at the end of the cooking process are necessarily higher and longer than those during normal rice cooking, for example, as shown in FIG. 8, so that the rice can be surely cooked in a charred state. become.

Moreover, as described above, in the electric rice cooker main body of the present embodiment, the work coils C ₁ and C ₂ are divided and arranged in two directions, inside and outside, of the bottom portion 2a of the circular rice cooker type rice cooker 2. Since the outer work coil C ₂ corresponds to the side surface portion 2c of the rice cooker 2, the entire cooked rice in the rice cooker 2 is evenly charred.

(Third Embodiment) FIGS. 9 and 10 are flow charts showing the contents of the burnt rice control according to the third embodiment of the present invention which is carried out in the electric rice cooker having the configuration shown in FIGS. And a time chart.

In the burnt rice control of the present embodiment, the cooked rice can be cooked by setting the heating temperature of the rice cooker in the "Murashi process" in the rice cooking process to be slightly higher than the heating temperature of the rice cooker during normal cooking. It is characterized by having done.

That is, first, in step S ₁ , the operation data of each operation switch is input, and then in step S ₂ , it is determined whether or not the charring switch 116 is ON-operated to the “burning” side, YES, "browning" display as shown in FIG. 3 in the cooker liquid crystal display part 117 of the body proceeds to step S ₄ after having set the browning memory described above in step S ₃ when the (oN to browning side) I do. And then
Furthermore, it progresses to step S ₅ and rice cook start switch 1
It is determined whether 12 is turned on.

[0068] On the other hand, the normal (ordinary) cooking the NO browned switch 116 is determined in the step S ₂ is not turned ON in the "brown" side, the process proceeds to step S _5.

When the result of the determination in step S ₅ is YES, that is, when the rice cooking start switch 112 is turned on, the work coils C ₁ and C ₂ are turned on at a predetermined low output to raise the rice cooker temperature to the water absorption temperature and the predetermined water absorption. The water absorption process of step S ₆ is executed within the time.

After that, when the water absorption time has elapsed and the water absorption process is completed, the output of the work coil is maximized to quickly raise the temperature of the rice cooker, and first, the sum is judged in step S ₇ . Then, after that, when the boiling temperature is reached, the cooking process of step S ₈ is executed. Then, in step S ₉ in the cooking step, the cooking completion temperature is 130 ° C.
It is determined whether or not this is the case.

If the result of this determination is YES, it is recognized that the cooking has been completed, and the process proceeds to the next step S _{10, the} unevenness process.

[0072] In the steaming process, the browning memory first, in step S ₁₁ it is determined whether it is excisional, N
Step S ₁₂ to perform normal unevenness was starting temperature 110 ° C. The following determination during cooking when the O, the other, unevenness in browning cooking higher than during the normal cooking when the YES Start Temperature 11
The process proceeds to step S ₁₃ for making a determination of 4 ° C. or less.

When the result of the determination of the unevenness start temperature in steps S ₁₂ and S ₁₃ is YES, and the rice cooker temperature drops to the corresponding unevenness temperatures of 110 ° C. and 114 ° C., respectively, step S ₁₅ Then, the output control (work coil ON) of the work coils C ₁ and C ₂ for maintaining the uneven temperatures 110 ° C. and 114 ° C. is executed.
On the other hand, when the uneven temperatures have not yet decreased to 110 ° C. and 114 ° C., respectively, the process proceeds to step S ₁₄ to turn off the work coils C ₁ and C ₂ or keep the OFF state.

As described above, the unevenness process at different temperatures is executed for a predetermined time, and it is determined in step S ₁₆ whether or not the unevenness time has elapsed.

When the result is YES, the heat retention step of step S ₁₇ is started.

As described above, in the burnt rice control of the present embodiment, the uneven temperature in the "murai process" during the cooked rice is increased to 114 ° C, which is 4 ° C higher than the uneven temperature of 110 ° C during normal rice cooking. It is set.

Therefore, as shown in FIG. 10, the rice cooker heating temperature and the steaming time in the steaming process are necessarily higher and longer than those in the normal rice cooking so that the rice can be cooked properly in a charred state. Become.

Moreover, as described above, in the electric rice cooker main body of the present embodiment, the work coils C ₁ and C ₂ are divided and arranged in the inner and outer two directions of the bottom 2a of the circular rice cooker type rice cooker. Since the outer work coil C ₂ corresponds to the side surface portion 2c of the rice cooker 2, the entire cooked rice in the rice cooker 2 is evenly charred.

(Embodiment 4) FIG. 11 and FIG.
It is a flowchart and a time chart which show the content of the burnt rice control which concerns on Embodiment 4 of this invention implemented in the electric rice cooker of the said structure of FIGS.

In the burnt rice control of the present embodiment, the rice cooker heating temperature in both the "cooking process" and the "murai process" in the rice cooking process is set higher than the rice cooker heating temperature during normal rice cooking. By doing so, it is possible to efficiently burn and cook rice.

That is, first, in step S ₁ , the operation data of each operation switch is input, and then in step S ₂ , it is determined whether or not the charring switch 116 has been turned ON to the “burning” side, YES, "browning" display as shown in FIG. 3 in the cooker liquid crystal display part 117 of the body proceeds to step S ₄ after having set the browning memory described above in step S ₃ when the (oN to browning side) I do. And then
Furthermore, it progresses to step S ₅ and rice cook start switch 1
It is determined whether 12 is turned on.

On the other hand, if it is determined in step S ₂ that the NO burn switch 116 is not turned on to the “burn” side, the process directly proceeds to step S ₅ .

When the result of the determination in step S ₅ is YES, that is, when the rice cooking start switch 112 is turned on, the work coils C ₁ and C ₂ are turned on at a predetermined low output to raise the temperature of the rice cooker to the water absorption temperature and the predetermined water absorption. The water absorption process of step S ₆ is executed within the time.

After that, when the water absorption time has elapsed and the water absorption process is completed, the output of the work coil is maximized to quickly raise the temperature of the rice cooker, and first, the sum is judged in step S ₇ . Then, when the boiling state is reached thereafter, the cooking process of step S ₈ is executed. Then, it is determined in該炊-out up process, first, in step S ₉ whether browning memory in step S ₃ is set. As a result, in the case of NO when the burning memory is not set,
Proceeds to step S _10, while determining whether or not the normal becomes cook up completion temperature 130 ° C. or higher during cooking, the normal cooking process proceeds to step S ₁₁ when the YES of browning memory is set Cooking completion temperature of 1 above 130 ℃
It is determined whether or not the cooking completion temperature is 0 ° C higher than 140 ° C.

As a result, if each result is YES,
Recognizing that the cooking has been completed, the process proceeds to the next step S _{12, the} purging process.

[0086] The steaming in the step, first determines whether it is again the browning memory excisional at step S _13, step performs a normal unevenness was starting temperature 110 ° C. The following determination during cooking when the NO S _14, while when YES, the flow advances each step S ₁₅ to perform the unevenness was starting temperature 114 ° C. the following determination during browning cooking higher than during the normal cooking.

[0087] Then, each step S _14, S ₁₅ nonuniformity and the determination of the starting temperature results, YES and become by uneven temperature 110 ° C. rice device temperature corresponds, when reduced to 114 ° C., respectively Step S ₁₇ Then, the output control of the work coils C ₁ and C ₂ for maintaining the uneven temperatures 110 ° C. and 114 ° C. is executed. On the other hand, when the uneven temperatures have not yet dropped to 110 ° C. and 114 ° C., the process proceeds to step S ₁₆ and the work coils C ₁ and C _{2 respectively.}
OFF or continue OFF state.

As described above, the nonuniformity process at different temperatures is executed for a predetermined time, and in step S ₁₈ , the elapse of the nonuniformity time is determined.

When the result is YES, the heat retention step of step S ₁₉ is started.

As described above, in the burnt rice control of the present embodiment, the cooking completion determination temperature in the "cooking process" and the mudling temperature in the "murai process" at the time of burning cooked rice are respectively set during normal cooking. 10 for each temperature
℃ and 4 ℃ are set higher.

Therefore, the heating temperature of the rice cooker in the cooking process, the heating temperature of the rice cooker in the mulling process, and each heating time are necessarily higher and longer than those in the normal rice cooking, as shown in FIG. 12, for example. You will be able to cook more reliably and efficiently in a charred state.

Moreover, as described above, in the electric rice cooker main body of the present embodiment, the work coils C ₁ and C ₂ are divided and arranged in the inner and outer directions of the bottom portion 2a of the circular rice cooker type rice cooker 2. Since the outer work coil C ₂ corresponds to the side surface portion 2c of the rice cooker 2, the entire cooked rice in the rice cooker 2 is evenly charred.

(Modification) By the way, the operation panel of the electric rice cooker body of each of the above-described embodiments and the scorching switch thereof can be variously modified, for example, as in the following modifications.

(1) Modification 1 In this example, as shown in FIG. 13, for example, the slide operation type burnt switch 116 described above is changed to a tact switch 121 similar to the rice cooking start switch 112 described above, and "Kageme" display part is the LED display part 121a
It is characterized by changing to. Other configurations are the same as those in FIG.

With such a configuration, the burnt rice control in each of the above-described embodiments can be realized in exactly the same manner.

(2) Modified Example 2 In this example, as shown in FIG. 14, for example, the seesaw lever type switch 121 capable of selectively turning on and off the slide operation type scorching switch 116 at two upper and lower positions.
In addition to the above, the "normal" and "low burn" display sections are respectively corresponding to the upper and lower two sets of LED display sections 121.
It is characterized in that it is changed to a, 121b, and that a bar graph type scorching level display 123 of three stages of large, medium and small can be displayed below the display noodles of the liquid crystal display unit 117. Other configurations are the same as those in FIG.

With such a configuration, the burnt rice control in each of the above-described embodiments can be realized in exactly the same manner, and an optional burnt level can be set in this configuration.

(3) Modified Example 3 In this example, as shown in FIG. 15, for example, the above-mentioned rice-cooking start switch 112 itself is also used without providing the above-mentioned dedicated charring switches 116 and 121 at all. For example, when the rice cooking start switch 112 is pressed once, the rice cooking function is set to the normal rice cooking function, and when the rice cooking start switch 112 is pressed twice, the rice cooking function is set to the charcoal rice cooking function, thereby reducing the number of switches and reducing the cost. Is.

Correspondingly, for example, a burnt rice control program as shown in the flow chart of FIG. 16 is adopted, and normal rice and burned rice are cooked by the number of times the rice cooking start switch 112 is turned ON (one or two times). Each heating control sequence is arbitrarily selected.

[0100] The above-described burnt rice control can also achieve the same operation and effect of each of the above-mentioned embodiments.

[Brief description of drawings]

FIG. 1 is a central vertical cross-sectional view showing a configuration of an electric rice cooker main body common to each embodiment of the present invention, which is cut left and right at a central portion in a front-rear direction.

FIG. 2 is a central longitudinal cross-sectional view of the main body of the electric rice cooker cut in the front-rear direction at the center portion in the left-right direction.

FIG. 3 is an enlarged front view of an operation panel portion that is a main portion of the electric rice cooker body.

FIG. 4 is a connection diagram of a control circuit unit of the electric rice cooker.

FIG. 5 is a flow chart showing the contents of burnt rice control of the electric rice cooker according to the first embodiment of the present invention.

FIG. 6 is a time chart corresponding to the control of FIG.

FIG. 7 is a flow chart showing the contents of burnt rice control of the electric rice cooker according to the second embodiment of the present invention.

FIG. 8 is a time chart corresponding to the control of FIG.

FIG. 9 is a flow chart showing the contents of burnt rice control of the electric rice cooker according to the third embodiment of the present invention.

FIG. 10 is a time chart corresponding to the control of FIG.

FIG. 11 is a flowchart showing the contents of burnt rice control of the electric rice cooker according to the fourth embodiment of the present invention.

FIG. 12 is a time chart corresponding to the control of FIG.

FIG. 13 is a front view of Modification 1 of the electric rice cooker main body operation panel unit according to each embodiment of the present invention.

FIG. 14 is a front view of Modification 2 of the electric rice cooker main body operation panel unit according to the embodiments of the present invention.

FIG. 15 is a front view of modified example 3 of the electric rice cooker main body operation panel unit according to each embodiment of the present invention.

FIG. 16 is a flow chart of burnt rice control corresponding to the configuration of FIG. 15.

[Explanation of symbols]

1 is an electric rice cooker, 2 is a rice cooker, 3 is an inner case, 4 is an outer case, 23 is a temperature detection circuit section, 23a is a thermistor, 61
Is a microcomputer control unit, C ₁ is an inner first work coil, C ₂ is an outer second work coil, 112 is a rice cooking switch, and 116 and 121 are charring switches.

Claims (5)

[Claims] 1. A rice cooking heating means for heating a rice cooker containing rice and water, and a temperature sensor for detecting the temperature of the rice cooker.
An electric rice cooker comprising heating control means for controlling heating of the rice cooking heating means with a predetermined rice cooking characteristic according to the temperature detection value of the temperature sensor, wherein the charred rice cooking function selecting means is provided, and the charred rice cooking function is provided. The electric rice cooker is characterized in that when the burnt rice cooking function is selected by the function selecting means, the rice cooker heating temperature of the rice cooking heating means controlled by the heating control means is set higher than that during normal rice cooking. . 2. The electric rice cooker according to claim 1, wherein the heating temperature of the rice cooker when the burnt rice cooking function is selected is set to be higher in the cooking process than during normal rice cooking. 3. The heating temperature of the rice cooker when the cooked rice function is selected is set such that the temperature at the completion of cooking in the cooking process is set higher than that during normal rice cooking, and the same temperature is maintained for a predetermined time. The electric rice cooker according to claim 1, wherein the electric rice cooker is configured as follows. 4. The electric rice cooker according to claim 1, wherein the heating temperature of the rice cooker at the time of selecting the burnt rice cooking function is set higher than that at the time of normal rice cooking in the purging process. 5. The heating temperature of the rice cooker when the burnt rice cooking function is selected is set to be higher than that during normal rice cooking in both the cooking process and the mulling process. The electric rice cooker described in 1.