JP3511979B2 - Electric rice cooker - Google Patents

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, and more particularly to electric power control during porridge or porridge cooking in the electric rice cooker.

[0002]

2. Description of the Related Art As a conventionally known electric rice cooker, a rice cooker main body is constructed so that the rice cooker can be freely stored.
Some include a lid of the rice cooker body, heating means for heating the rice cooker, and temperature detecting means for detecting the temperature of the rice cooker.

The electric rice cooker having the above structure can be used not only for cooking rice, but also for cooking porridge and rice porridge.

[0004]

However, when porridge or rice porridge is cooked from rice using an electric rice cooker, temperature rise and convection, which are different from those of rice cooked from rice, occur. Also, the state of rice and soup stock before cooking is various,
The same temperature detection as rice causes a problem that the cooked rice is not constant.

The present invention has been made in view of the above points, and makes it possible to cook porridge or porridge well from rice regardless of the state of rice before cooking and the state of soup stock. The purpose is.

[0006]

According to a first aspect of the present invention, as means for solving the above-mentioned problems, a rice cooker main body configured to be capable of accommodating a rice cooker in a freely removable manner, and a rice cooker main body of the rice cooker main body. In an electric rice cooker equipped with a lid, a heating means for heating the rice cooker, and a temperature detecting means for detecting the temperature of the rice cooker, a predetermined temperature during heating by the heating means when cooking rice cooked rice etc. Predetermined time at the rice cooker temperature
Only the temperature of the rice cooker when the power supply to the heating means is stopped
First determining means for determining the gap between the temperature of the rice cooker and the temperature of the contents based on the degree of drop, and the subsequent heating condition by the heating means is set based on the result of the determination by the first determining means. And a first heating condition setting means for controlling, and an output of the heating means for a predetermined time at the time when heating under the heating condition set by the first heating condition setting means is completed.
Or the power supply to the heating means is stopped
Second determining means for determining the gap between the temperature of the rice cooker and the temperature of the contents based on the degree of decrease in the temperature of the rice cooker;
Second heating condition setting means for setting the subsequent heating conditions by the heating means based on the result of the judgment by the judging means.

[0007] By the structure described above, when cooking porridge and the like from the rice by energization of the heating means, Oite a predetermined rice device temperature in the middle of the heating by the heating means
When the power supply to the heating means is stopped for a predetermined time,
The gap between the rice cooker temperature and the temperature of the contents is determined by the first determining means based on the degree of decrease of the rice cooker temperature, and the subsequent heating condition by the heating means is the first heating condition based on the result of the determination. When the heating under the heating condition set by the setting device and set by the first heating condition setting device is completed , the output of the heating device is reduced for a predetermined time.
Or when the power supply to the heating means is stopped
The gap between the temperature of the rice cooker and the temperature of the contents is determined by the second determining means based on the degree of decrease of the rice cooker temperature, and the subsequent heating condition by the heating means is the second heating condition based on the result of the determination. It is set by the setting means. Therefore, the gap between the temperature of the rice cooker and the temperature of the contents is determined by the first and second determination means, the subsequent heating condition is set based on the determination, and the rice is cooked according to the heating condition. , Regardless of the state (for example, temperature and amount) of the contents (for example, rice and seasoned soup stock or rice and water) contained in the rice cooker, the porridge can be cooked well.

As in the invention of claim 2 , claim 1
In the electric rice cooker described above, when the heating condition set by the first heating condition setting means is set as a heating time obtained by a linear equation having a drop degree of the rice cooker temperature as a variable, Setting is easy.

As in the invention of claim 3 , claim 1
In the electric rice cooker according to any one of 1 and 2 , the heating condition set by the second heating condition setting means is predicted corresponding to the result of the judgment by the second judging means. If a constant heating time that will be set, even if a state in which insufficient cook during the determination by the second determination means, by heating only the second heating condition setting set pressurized heat time by means, always good It will be possible to obtain a perfect cooked state.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Some preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

First Embodiment FIGS. 1 to 3 show an electric rice cooker according to a first embodiment of the present invention.

As shown in FIG. 1, this electric rice cooker is a synthetic resin which is configured to form an outer case 4 forming an outer peripheral surface and an inner peripheral surface and to accommodate a rice cooker 5 made of a magnetic material. Rice cooker main body 1 constituted by a protective frame 6 made of rice, a lid 2 of the rice cooker main body 1, and a heating means located on the outer peripheral side of the protective frame 6 to heat the rice cooker 5. Electromagnetic induction coil (hereinafter referred to as work coil) 3
And is configured.

The outer case 4 has a body portion 4a serving as a side peripheral surface of the rice cooker body 1 and a shoulder portion 4b serving as a connecting portion with an upper edge of the protective frame 6, and a bottom portion of the rice cooker body 1. In the present embodiment, the body portion 4a and the shoulder portion 4b are integrally formed by synthetic resin, and the bottom portion 4c is a separate structure. In some cases, the body portion 4a and the bottom portion 4c may be integrally formed of synthetic resin, and the shoulder portion 4b may be separately formed.

The upper portion of the outer case 4 on the front side of the body portion 4a is gently inclined, and an operation panel portion 7 is provided at that portion.

Annular work coils 3 are provided on the bottom surface and the back surface of the curved surface of the protective frame 6, respectively. The work coils 3 and 3 are positioned while being sandwiched between a coil die 8 and the protective frame 6 which are joined to each other on the lower surface of the central portion of the bottom surface of the protective frame 6 and which extends radially along the protective frame 6. There is. In other words, the work coils 3 and 3 have a shape that follows the shape of the outer peripheral surface of the protective frame 6. Reference numeral 9 is a temperature sensor that functions as a temperature detecting means for detecting the temperature of the rice cooker 5, and 10 is a heat retaining heater that functions as a heat retaining heating source.

A shoulder ring 11 made of synthetic resin is attached by force fitting to the inner peripheral edge of the shoulder portion 4b of the outer case 4 (in other words, the rim of the rice cooker body 1).
On the upper surface of the shoulder ring 11, a metal heater ring 13 having a shoulder heater 12 acting as a heat source for heat retention is attached. As will be described later, the outer peripheral portion of the vacuum double structure 21 in the lid body 2 is pressed against the upper surface of the heater ring 13 when the lid body 2 is closed (in other words, contact is made so that heat conduction is possible). Has become.

That is, in the present embodiment, the heat retaining heater 10 and the shoulder heater 12 constitute a heat retaining heating source. Instead of the shoulder heater 12, a lid heater attached to a heat dissipation plate provided on the lower surface of the lid body 2 may be employed. In that case, the heat retaining heater and the lid heater constitute a heat retaining heating source. Becomes

A fan 15 for cooling a rice cooker is arranged at the center of a rear space portion 14 formed between the back side of the outer case 4 and the back side of the protective frame 6. The cooling air from the cooling fan 15 is supplied to the air passage 17 formed between the shoulder portion 4b and the upper end of the protective frame 6 through the duct 16, and the ventilator 18 and the rice cooker 5 and the protective frame are provided. 6 is supplied to a gap S formed between the rice cooker 6 and the outer peripheral surface of the rice cooker 5 to be cooled. The cooling of the rice cooker 5 is performed, for example, from the completion of cooking to the transition to the target heat retention temperature or at a predetermined time determined to be necessary during the heat retention step.

On the other hand, the lid 2 is openably and closably attached to the rear portion of the outer case shoulder portion 4b (that is, the opposite side of the operation panel portion 7) via a hinge unit 19 so as to be detachable. It is composed of a synthetic resin cover plate 20 forming an upper surface and a vacuum double structure 21 forming a lower surface.

An opening 22 into which a pressure adjusting cap 30 to be described later is detachably inserted is formed in a substantially central portion of the lid plate 20, and an outer screw is provided on the outer periphery at the rim of the opening 22. The screw cylinder 23 is integrally attached by high frequency welding.

The vacuum double structure 21 is constructed by forming a vacuum space 26 between two upper and lower donut-shaped metal plates 24 and 25 whose inner and outer peripheral portions are joined to each other. Inner peripheral side joint portion 21a of the vacuum double structure 21
Is covered with a seal member 27 and is fitted and inserted into the outer periphery of the screw cylinder 23. A vertical wall portion 25a, which secures strength and serves as a mounting portion for a seal packing 36 to be described later, is formed at a position outside the outer periphery of the lower metal plate 25 that constitutes the vacuum double structure 21.

In the vacuum double structure 21, the screw ring 23 having an internal thread is screwed onto the screw cylinder 23 in a state where the screw cylinder 23 is fitted into the inner peripheral side joint portion 21a and tightened. It is installed by. That is, the vacuum double structure 21 can be attached to and detached from the upper plate 20 by screwing the screw ring 28.

In the screw cylinder 23, a pressure adjusting cylinder 29 is provided.
Is detachably attached, and the upper side of the pressure regulating cylinder 29 is covered with a pressure regulating cap 30 which is removably fitted in the opening 22. Reference numeral 31 is a steam inlet to the pressure adjusting cylinder 29, 32 is a steam outlet from the pressure adjusting cylinder 29, 33 is a steam outlet in the pressure adjusting cap 30, 34 is a ball valve,
Reference numeral 35 is a seal packing attached to the outer periphery of the pressure adjusting cylinder 29.

By the way, in the present embodiment, the vacuum double structure 21 has an upper metal plate 24 made of a material having poor heat conduction (for example, stainless steel, titanium, etc.) and a material having good heat conduction (for example, And a lower metal plate 25 made of aluminum, an aluminum alloy, or the like). Therefore, as a joining means for joining the upper and lower metal plates 24, 25, a brazing type capable of joining dissimilar metals is adopted.

The outer peripheral portion of the lower metal plate 25 has a rim (that is, a rim) of the rice cooker body 1 when the lid 2 is closed.
The shoulder heater 12 (specifically, the heater ring 13) provided on the outer case shoulder portion 4a) is brought into contact with the shoulder heater 12 in a heat conductive manner.

Then, the vertical wall portion 25 of the lower metal plate 25.
A seal packing 36 for sealing the opening of the rice cooker 5 when the lid 2 is closed is attached to a by a packing ring 37.

In FIG. 1, reference numeral 38 denotes a carrying handle, 39 denotes a lock mechanism for holding the lid 2 in a closed state, 4
0 is a heat insulating material.

By the way, the operation panel section 7 is shown in FIG.
As shown in, rice cooking key 41, heat retention selection key 42, cancel key 43, reservation key 44, menu key 45, reheat key 46, hour key 47, minute key 48, rice cooking indicator 49, heat retaining indicator 50, reservation A display lamp 51 and a liquid crystal display unit 52 are provided. The liquid crystal display section 52 has a clock / temperature display section 52a for displaying a clock and temperature in seven segments.
And the menu "White rice, early cook, separate, brown rice, porridge,
And a menu display section 52b for displaying "cook, cooked rice, pilaf, porridge".

The electric elements in the electric rice cooker having the above-mentioned structure are connected as shown in the block diagram of FIG. Note that the same reference numerals are given to the electrical elements that have already been described, and detailed description thereof will be omitted.

In FIG. 3, reference numeral 53 is a microcomputer unit (hereinafter referred to as a microcomputer), 54 is a commercial AC power supply, 55 is a rectifier circuit, 56 is a synchronous trigger circuit, 57 is a pulse width modulation circuit, and 58 is an IGBT drive. Circuit, 59 is a power feedback circuit, 60 is a power transistor, 61 is a stabilized power supply, 62 is a rectifier circuit, 63
Is a step-down transformer, 64 is a triac drive power supply circuit, 6
5 is a triac drive circuit, 66, 67 and 68 are triacs, and 69 is a fan motor of the rice cooker cooling fan 15.

The microcomputer 53 sets the temperature of the rice cooker detected by the temperature sensor 9 and the temperature of the contents at a predetermined rice cooker temperature T ₀ during the heating by the work coil 3 when cooking rice cooked rice. A function as a first determining means for determining a gap, and a first heating condition for the work coil 3 (that is, a heating time t) is set based on the result of the determination by the first determining means.
And the temperature of the rice cooker detected by the temperature sensor 9 and the temperature of the contents when the heating under the heating condition set by the first heating condition setting unit is completed. A function as a second determining means for determining the gap, and a function as a second heating condition setting means for setting the subsequent heating condition by the work coil 3 based on the result of the determination by the second determining means. have. In the present embodiment, the determination criterion in the first determining means is the rice cooker temperature when the work coil 3 is de-energized for a predetermined time t ₁ (for example, 90 seconds) at a predetermined rice cooker temperature T ₀ . Degree X (= T ₀ −T ₁ )
And the judgment criterion in the second judging means is
In the heating condition set by the first heating condition setting means
Predetermined at the rice cooker temperature T ₂ at the time when heating is completed
Output of the work coil 3 at time t ₂ (for example, 120 seconds)
When it is lowered or the power supply to the work coil 3 is stopped
It is said that the rice bowl temperature drop X (= T ₂ −T ₃ ) . The heating condition set by the first heating condition setting means is a heating time t (= a) obtained by a linear equation (detailed later) having the degree of decrease X of the rice cooker temperature as a variable.
It is supposed to be set as X + b). here,
The coefficients a and b are obtained in advance by experiments or the like.

Next, the heating control of the electric rice cooker having the above-described structure during cooking will be described in detail with reference to the flowchart shown in FIG.

When cooking porridge, rice and seasoned broth are placed in the rice cooker 5 and the work coil 3 is energized for cooking.

When the work coil 3 is energized at the duty ratio = 16/16 in step S1, the temperature information (ie, rice cooker temperature) T from the temperature sensor 9 is input to the microcomputer 53 in step S2. In step S3, it is determined whether T ≧ T ₀ (for example, 91 ° C.).

If an affirmative decision is made in step S3, the energization of the work coil 3 is stopped in step S4, and the time t ₁ (for example, 9
When it is determined that 0 seconds) has elapsed, the rice cooker temperature T ₁ at that time is stored in the microcomputer 53 in step S6.
That is, as shown in FIGS. 5 (a) and 5 (b), the temperature of the rice cooker 3 is stopped due to the gap between the temperature of the rice cooker (curve A) and the temperature of the contents (curve B). Causes a temperature drop.

Then, in step S7, the degree of decrease in the temperature of the rice cooker X = T ₀ -T ₁ and the subsequent heating condition (in other words, heating time) t = aX + b are calculated. This linear equation is determined based on the characteristic diagram shown in FIG. That is, in the characteristic diagram of FIG. 6, the data when the amount of rice is changed, the temperature of the rice cooker is changed, and the rice is cooked is experimentally obtained. Based on this, the rice temperature becomes 100 ° C. The time t up to is represented as a straight line C. Coefficients a = 6 and b = −48 on the straight line C are set.

In step S8, the work coil 3 is again used.
When the energization with the duty ratio = 16/16 is started and it is confirmed in step S9 that the heating time t has elapsed, the rice cooker temperature T ₂ at that time is stored in the microcomputer 53 in step S10. That is, the cooked rice is cooked up until the heating time t elapses.

Next, in step S11, the duty ratio of the work coil 3 is reduced from 16/16 to 5/16, and in step S12, the time t ₂ (for example, 12
When it is confirmed that 0 seconds) has elapsed, the rice cooker temperature T ₃ at that time is stored in the microcomputer 53 in step S13.

Next, in step S14, the temperature drop degree X (= T ₂ -T ₃ ) at that time and the set value C (for example, 5 ° C.)
When it is determined that T ₂ −T ₃ > C, the temperature of the contents has not yet reached 100 ° C. (that is, It is determined that the duty ratio of the work coil 3 is increased from 5/16 to 10/16 in step S15, and it is determined that time t ₃ (for example, 420 seconds) has elapsed in step S16. Until the work coil 3 is energized (duty ratio = 10/16) in step S17, and the energization is performed in step S18 at time t ₄ (for example, 300).
Second) continues until it is determined that step S
If an affirmative determination is made in 18, the power supply to the work coil 3 is stopped in step S19, and the process proceeds to the steaming step. In step S20, time t ₅ (for example, 60
When the second) elapses, the porridge cooking ends. When it is determined in step S14 that T ₂ −T ₃ ≦ C, the temperature of the contents is 100 ° C. as shown in FIG.
When it is determined that it has reached the vicinity, the process directly proceeds to step S17, and the heating control thereafter is performed (that is, the heating time is set to be short). When obtaining the second temperature drop degree, it is preferable to reduce the output of the work coil 3 as in the present embodiment because the temperature of the cooked rice cooked will not decrease. The energization may be stopped.

As described above, in the present embodiment, when cooking rice cooked rice by energizing the work coil 3, the rice cooker temperature at a predetermined rice cooker temperature T ₀ during heating by the work coil 3 and The subsequent heating condition by the work coil 3 (in other words, the heating time t based on the gap with the temperature of the contents (in other words, the degree of decrease X in the rice cooker temperature when the energization of the work coil 3 is stopped)) ) Is set and the gap between the temperature of the rice cooker and the temperature of the contents at the end of heating under the heating condition (that is, the heating time t) (in other words, the rice when the output of the work coil 3 is reduced). The subsequent heating condition (in other words, lengthening or shortening the heating time) by the work coil 3 is set based on the degree of decrease X in the chamber temperature X = T ₂ −T ₃ ). Therefore, the subsequent heating conditions are set based on the gap between the rice cooker temperature and the temperature of the contents, and the rice is cooked according to the heating conditions, and the contents (for example, rice and seasoning) Irrespective of the condition of the soup stock or rice and water (for example, the temperature and the amount), the porridge can be cooked well.

Second Embodiment FIG. 7 is a flow chart showing the contents of heating control at the time of miscellaneous cooking in the electric rice cooker according to the second embodiment of the present invention.

In this case, when the second determining means determines that the subsequent heating is not necessary, the second heating condition setting means omits the setting of the heating conditions and shifts to the steaming step. .

The heating control of the electric rice cooker according to the present embodiment at the time of miscellaneous cooking will be described.

When the work coil 3 is energized at the duty ratio = 16/16 in step S1, the temperature information (that is, the rice cooker temperature) T from the temperature sensor 9 is input to the microcomputer 53 in step S2. In step S3, it is determined whether T ≧ T ₀ (for example, 94 ° C.).

If an affirmative decision is made in step S3, the energization of the work coil 3 is stopped in step S4, and the time t ₁ (for example, 9
When it is determined that 0 seconds) has elapsed, the rice cooker temperature T ₁ at that time is stored in the microcomputer 53 in step S6.
That is, as shown in FIGS. 5 (a) and 5 (b), the temperature of the rice cooker 3 is stopped due to the gap between the temperature of the rice cooker (curve A) and the temperature of the contents (curve B). Causes a temperature drop.

Then, in step S7, the degree of decrease in the rice cooker temperature X = T ₀ -T ₁ and the subsequent heating condition (in other words, heating time) t = aX + b are calculated. This linear equation is determined based on the characteristic diagram shown in FIG. That is, in the characteristic diagram of FIG. 6, the data when the amount of rice is changed, the temperature of the rice cooker is changed, and the rice is cooked is experimentally obtained. Based on this, the rice temperature becomes 100 ° C. The time t up to is represented as a straight line C. Coefficients a = 6 and b = −48 on the straight line C are set.

In step S8, the work coil 3 is again used.
When the energization with the duty ratio = 16/16 is started and it is confirmed in step S9 that the heating time t has elapsed, the rice cooker temperature T ₂ at that time is stored in the microcomputer 53 in step S10. That is, the cooked rice is cooked up until the heating time t elapses.

Next, in step S11, the duty ratio of the work coil 3 is reduced from 16/16 to 5/16, and in step S12, the time t ₂ (for example, 12
When it is confirmed that 0 seconds) has elapsed, the rice cooker temperature T ₃ at that time is stored in the microcomputer 53 in step S13.

Next, in step S14, the temperature drop degree X (= T ₂ -T ₃ ) at that time and the set value C (for example, 5 ° C.)
When it is determined that T ₂ −T ₃ > C, the temperature of the contents has not yet reached 100 ° C. (that is, It has been determined that the cooked rice has not been cooked), the duty ratio of the work coil 3 is increased from 5/16 to 10/16 in step S15, and it is determined in step S16 that time t ₃ (for example, 300 seconds) has elapsed. Until the work coil 3 is energized, the work coil 3 is stopped in step S17, and the process proceeds to the steaming step.
At time t ₄ (for example, 50 seconds), the cooked rice cooking ends. In step S14, T
When it is determined that _2- T ₃ ≦ C, it is determined that the temperature of the contents has reached 100 ° C. as shown in FIG. 6B, the subsequent cooking is omitted, and step S17 is performed. Directly, the power supply to the work coil 3 is stopped and the process proceeds to the steaming process. When obtaining the second temperature drop degree, it is preferable to reduce the output of the work coil 3 as in the present embodiment because the temperature of the cooked rice cooked will not decrease. The energization may be stopped.

As described above, in the present embodiment, when cooking rice cooked rice by energizing the work coil 3, the rice cooker temperature at a predetermined rice cooker temperature T ₀ during heating by the work coil 3 and The subsequent heating condition by the work coil 3 (in other words, the heating time t based on the gap with the temperature of the contents (in other words, the degree of decrease X in the rice cooker temperature when the energization of the work coil 3 is stopped)) ) Is set and the gap between the temperature of the rice cooker and the temperature of the contents at the end of heating under the heating condition (that is, the heating time t) (in other words, the rice when the output of the work coil 3 is reduced). The subsequent heating condition (in other words, heating or not) by the work coil 3 is set on the basis of the degree of decrease X in the chamber temperature X = T ₂ −T ₃ ). Therefore, the subsequent heating conditions are set based on the gap between the rice cooker temperature and the temperature of the contents, and the rice is cooked according to the heating conditions, and the contents (for example, rice and seasoning) Irrespective of the condition of the soup stock or rice and water (for example, the temperature and the amount), the porridge can be cooked well. Moreover, since unnecessary heating is omitted, cooking time is shortened and energy is saved.

The other structure, function and effect are the same as those in the first embodiment, and the description thereof will be omitted.

In each of the above embodiments, the case of cooking porridge has been described, but the same applies in any case as long as it cooks from rice such as porridge.

[0053]

According to the first aspect of the invention, the rice cooker main body is constructed so that the rice cooker can be stored in a removable manner, the lid of the rice cooker main body, and the heating means for heating the rice cooker. given the, in an electric rice cooker equipped with a temperature detecting means for detecting the temperature of the rice unit, in a predetermined rice device temperature of the middle heating by the heating means when cooking porridge like from rice
The rice cooker when the energization to the heating means is stopped for a time
First determining means for determining the gap between the temperature of the rice cooker and the temperature of the contents based on the degree of temperature drop, and the subsequent heating condition by the heating means based on the result of the determination by the first determining means. The first heating condition setting means to be set and the heating means of the heating means for a predetermined time when the heating under the heating conditions set by the first heating condition setting means is completed .
Reduce the output or stop the energization of the heating means
Second determining means for determining the gap between the temperature of the rice cooker and the temperature of the contents based on the degree of decrease in the temperature of the rice cooker at the time of heating, and the heating means based on the result of the determination by the second judging means. And a second heating condition setting means for setting subsequent heating conditions according to the above, when cooking porridge from rice by energizing the heating means, the rice cooker at a predetermined rice cooker temperature during heating by the heating means. The gap between the temperature and the temperature of the contents is judged by the first judging means, and the subsequent heating condition by the heating means is set by the first heating condition setting means based on the result of the judgment, and the first heating condition is set. The gap between the temperature of the rice cooker and the temperature of the contents at the time when the heating under the heating condition set by the condition setting unit is completed is determined by the second determination unit, and the heating unit is determined based on the result of the determination. Since the subsequent heating condition is set by the second heating condition setting means, the gap between the rice cooker temperature and the temperature of the contents is judged by the first and second judging means, and based on the judgment. The subsequent heating conditions are set, and the food is cooked according to the heating conditions, and the state of the contents (for example, rice and seasoned soup stock or rice and water) stored in the rice cooker (for example, temperature and amount) However, there is an effect that you can cook miscellaneous rice etc. well.

As in the invention of claim 2 , claim 1
In the electric rice cooker described above, when the heating condition set by the first heating condition setting means is set as a heating time obtained by a linear equation having a drop degree of the rice cooker temperature as a variable, Setting is easy.

As in the invention of claim 3 , claim 1
In the electric rice cooker according to any one of 1 and 2 , the heating condition set by the second heating condition setting means is predicted corresponding to the result of the judgment by the second judging means. When the set heating time is set, even if a state of insufficient cooking occurs at the time of determination by the second determination unit, heating is performed for a constant heating time set by the second heating condition setting unit, so that the heating condition is always good. The cooked state will be obtained.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an electric rice cooker according to a first embodiment of the present invention.

FIG. 2 is a front view of an operation panel unit in the electric rice cooker according to the first embodiment of the present invention.

FIG. 3 is a block diagram showing a connection state of electrical elements in the electric rice cooker according to the first embodiment of the present invention.

FIG. 4 is a flowchart showing the contents of heating control during porridge cooking in the electric rice cooker according to the first embodiment of the present invention.

FIG. 5 is a time chart showing a temporal change between a rice cooker temperature and a rice temperature during heating control.

FIG. 6 is a characteristic diagram showing the relationship between the degree of decrease X in the temperature of the rice cooker and the heating time t until the rice temperature reaches 100 ° C., as experimental data.

FIG. 7 is a flowchart showing the contents of heating control during porridge cooking in the electric rice cooker according to the second embodiment of the present invention.

[Explanation of symbols]

1 is a rice cooker body, 2 is a lid, 3 is heating means (work coil), 5 is a rice cooker, 9 is temperature detecting means (temperature sensor),
53 is a microcomputer unit (microcomputer), T
Is the rice cooker temperature, T ₀ is the predetermined rice cooker temperature, T ₂ is the cooked temperature
And X is the descent .

Front page continuation (58) Fields surveyed (Int.Cl. ⁷ , DB name) A47J 27/00 109 A47J 27/00 103

Claims (3)

(57) [Claims] 1. A rice cooker main body configured to be able to store the rice cooker freely, a lid of the rice cooker main body, a heating means for heating the rice cooker, and a temperature of the rice cooker detected. An electric rice cooker equipped with a temperature detecting means for controlling the heating means for a predetermined time at a predetermined rice cooker temperature during heating by the heating means when cooking rice cooked rice etc.
Based on the first determination means for determining the gap between the temperature of the rice cooker and the temperature of the contents based on the degree of decrease in the temperature of the rice cooker when the energization is stopped, and the result of the determination by the first judgment means. First setting of subsequent heating conditions by the heating means
Of the heating condition setting means and the heating condition set by the first heating condition setting means
Decrease the output of the heating means for a predetermined time or
The drop in the temperature of the rice cooker when the power to the heating means is stopped
Second determining means for determining the gap between the temperature of the rice cooker and the temperature of the contents on the basis of the degree, and a subsequent heating condition for the heating means based on the result of the determination by the second determining means. An electric rice cooker characterized by being provided with a heating condition setting means (2). 2. The heating condition set by the first heating condition setting means is set as a heating time obtained by a linear equation having a drop degree of the rice cooker temperature as a variable. The electric rice cooker according to item 1 . 3. The heating condition set by the second heating condition setting means is determined by the second judging means.
Claim 1 and an electric cooker according to any one claim of 2, characterized in that the heating time that will be set in advance corresponding to the result.