JP3000940B2 - Electric porridge pot - 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 porridge, and more particularly, to an electric rice porridge capable of cooking delicious rice porridge without causing spillage.

[0002]

2. Description of the Related Art As a rice cooker, an electric rice porridge pot mainly used for cooking rice porridge and an electric rice cooker having a function of cooking rice porridge have been well known.

[0003] When cooking rice porridge, in a conventional electric rice porridge, the state of power supply to the inner pot heating means is controlled by a microcomputer, and the temperature of the inner pot is set to a predetermined reference value as shown by a solid line in FIG. Heating is controlled so as to change according to a temperature curve (in other words, a heating curve). That is, by inner bowl temperature boils maintained only at the same power predetermined time t 'after reaching the boiling temperature T _1, it has been to raise cooking porridge.

[0004]

However, in the case described above, the contents (namely, rice and water) stored in the inner pot are required.
Is maintained at the boiling time t 'as shown by the dotted line in FIG.
During the initial period, the state where the temperature is lower than the inner pot temperature continues, and the boiling state is reached at the end of the boiling maintaining time t '.

Accordingly, if the amount of heating (for example, electric power) by the inner pot heating means during the boiling maintenance time t 'is fixed, if the boiling maintenance time t' is set to be long, the spill at the end of the boiling maintenance time t '. When the boiling time t 'is set to be short, a problem arises in that insufficient porridge is produced, and it is difficult to adjust the length of the boiling time t'.

[0006] The present invention has been made in view of the above points, and by setting the boiling maintenance time at two different levels of the amount of heating and the boiling maintenance temperature, it is possible to cook delicious porridge while preventing spillage. It is intended to be.

[0007]

According to the basic structure of the present invention, as means for solving the above problems, a heating means for heating the inner pot, a temperature detecting means for detecting the temperature of the inner pot, An electric rice porridge having heating amount control means for controlling the heating amount of the heating means in accordance with the temperature detected by the detection means, wherein the temperature of the inner pot detected by the temperature detection means reaches a predetermined value from when the temperature reaches the boiling temperature. The heating temperature and the boiling temperature for a predetermined time and a temperature lower than the boiling temperature by a predetermined temperature
Low heating amount than the heating amount and a first timer for setting a boiling Teng maintaining time you keep the boiling temperature, the boiling Teng maintaining time in the after the configured boiling Teng maintenance time by the first timer with the So that the temperature does not reach the boiling temperature.
And attaching a second timer for setting the heating maintaining time for maintaining a constant temperature lower temperature for a predetermined time, predetermined in boiling Teng maintaining time (i.e., time the inner pot temperature and the contents temperature is deviated) the predetermined temperature from the boiling temperature and the boiling temperature in the heating amount
The boiling temperature is maintained between the lower temperature and the heating time (that is, the time when the inner pot temperature and the contents temperature are substantially equal) during the heating time , the boiling temperature is lower than the heating amount at the boiling time. By maintaining the temperature lower than the predetermined temperature for a predetermined time , a delicious rice porridge can be cooked without causing spillage.

[0008] In the basic configuration of the present invention, the first and boiling that will be set by the second timer Teng maintenance time and pressure
When the heat maintaining time is changed in accordance with the size of the inner pot, the amount of heating can be controlled in accordance with the size of the inner pot, which is preferable in that good porridge can be cooked.

Further, when the first and second boiling Teng maintenance time and heating maintenance time that will be set by the timer, and adapted to change in response to the amount of the contained contents into the inner bowl and the contents It is preferable in that the heating amount can be controlled in accordance with the amount of porridge, and good porridge can be cooked.

[0010]

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

First, the structure of an electric rice cooker as an example of an electric rice porridge according to an embodiment of the present invention will be described.

FIG. 1 shows an electric rice cooker using an electromagnetic induction coil (hereinafter referred to as a work coil) as a heating means.

This electric rice cooker is constructed so that the inner pot 3 can be set therein and has a double-structured container body 1 having a space portion 4, and covers the upper opening of the container body 1 so as to be openable and closable. And a lid 2.

The container body 1 has a body 5a serving as an outer wall.
And an outer case 5 having a substantially inverted L-shaped cross section and integrally formed with a synthetic resin (for example, polypropylene) having a bottom portion 5b serving as a bottom wall, and a synthetic resin coupled to an upper end edge of the outer case 5. (For example, polypropylene) shoulder member 6
And a bottomed cylindrical inner case 7 made of synthetic resin (for example, made of polypropylene) engaged with the inner peripheral edge of the shoulder member 6. The outer case 5, the shoulder member 6, and the inner case 7, the space portion 4 is formed.
Note that the inner pan 3 is set in the inner case 7 so as to be removable.

At the center of the bottom surface of the inner case 7, there is formed a sensor hole 9 for receiving a center sensor 8 acting as a temperature detecting means, and acts as a heating means so as to surround the sensor hole 9. An annular work coil 10 is provided on the bottom surface of the inner case 7 and on a curved portion from the bottom surface to the side peripheral surface.

The inner pot 3 is of a round bottom type in which the radius of curvature of the curved portion from the bottom to the side periphery is large. The work coil 10 is arranged corresponding to the bottom and the curved portion of the inner pot 3. It is set up. The work coil 10 is disposed in a support frame 12 fixed to a bottom surface of the inner case 7 by screws 11.

A center sensor 8 is provided in the sensor hole 9 to be in contact with the bottom of the inner pot 3. A heater 13 for keeping heat is attached to a side peripheral surface of the inner case 7.

A heat shield plate 14 is supported below the support frame 12, and a cooling fan 15 is disposed on the heat shield plate 14. The cooling fan 15 sends cooling air to a power transistor and a rectifying diode bridge (not shown) for controlling the energization of the work coil 10. The cooling fan 15 is driven by the fan motor 16 and the fan motor 16. Axial impeller 17 is provided. A cooling air inlet 18 is formed on the bottom wall of the container body 1 (specifically, on the bottom surface of the bottom 5 b of the outer case 5) so as to face the cooling fan 15.

On the other hand, the lid 2 includes an upper plate 19 made of synthetic resin (for example, made of polypropylene) constituting the outer surface, and a lower plate 20 made of synthetic resin (made of, for example, polypropylene) constituting the inner peripheral surface. A hollow portion 22 for accommodating a heat insulating material 21 is formed between the upper and lower plates 19 and 20.

The lid 2 is rotatably and detachably attached to one side of the shoulder member 6 via a hinge pin 2a.

At the center of the lid 2, there is formed a tubular portion 23 which is suspended from the upper plate 19.
Is welded to the lower plate 20. The inside of the cylindrical portion 23 constitutes a part of a steam discharge passage 24 for discharging water vapor generated during rice cooking to the outside.

An engagement hole 25 is formed in the center of the lower plate 20. The engagement hole 25 has an inner cover 26 made of sheet metal.
Is detachably attached. The inner lid 26 hermetically closes and closes the opening of the inner pan 3 in the closed state of the lid 2. Makes it detachable.
A seal packing 28 is provided on the outer peripheral edge of the lower plate 20 to maintain an airtight state between the inner lid 26 and the lower plate 20 when the lid 2 is closed. That is, the lower plate 20
A steam chamber 24a which forms a part of the steam discharge passage 24 is formed between the inner lid 26 and the inner lid 26. Reference numeral 29 denotes a communication hole for communicating the steam chamber 24a with the inside of the cylindrical portion 23, reference numeral 30 denotes a communication portion formed by cutting the outer periphery of the elastic cylinder 27, and reference numeral 31 denotes a steam hole formed in the inner lid 26. is there.

The inner lid 26 is pressed against a shoulder heater 33 provided on the inner peripheral edge of the shoulder member 6 in a closed state of the lid 2, and heat transfer from the shoulder heater 33 is performed. To radiate heat. Reference numeral 32 denotes the inner lid 26 and the inner pot 3
Is a seal packing for maintaining airtightness with the opening.

In the space 4 on the front side of the container body 1 (ie, on the side where the lock mechanism 34 for locking the lid 2 is provided), the work coil 10, the heater 13 and the shoulder heater 33 are provided. A control board 35 in which a control unit for controlling the energization is incorporated is provided. On the front side of the shoulder member 6, an operation panel 36 that is inclined obliquely downward is provided.

As shown in FIG. 2, the operation panel 36 includes various switches (eg, a rice cooker switch 37, a cancel switch 38, a heat retention switch 39, a reservation switch 40, a timer set switch 41, and a time switch 41) necessary for rice cooking. A set switch 42, a minute set switch 43, a menu switch 44, etc.), a rice cooker switch 37, a rice cooker indicator lamp 45 for displaying the ON state of the reservation switch 40, a warmer indicator lamp 46, a reservation indicator lamp 47, A liquid crystal display device 48 for displaying a rice cooking menu, a switch operation level, a timer set time, and the like selected by each switch and visually recognizing the user is provided.

The liquid crystal display device 48 includes, for example, (A) a display of white rice, new rice, and the like, and (B) a rice cooker menu having different hardnesses such as sushi, cooked rice, brown rice, and rice porridge. Various kinds of display such as display and (C) timer set time are performed. Various menus and porridge thickening (weak / medium / strong) are indicated by arrows 49 and 50, respectively.
The display of the timer set time is indicated by the numeral 51.

Next, based on the electric circuit diagram shown in FIG. 3, the configuration of an electric control circuit section in the electric rice porridge (ie, electric rice cooker) according to the present embodiment will be described.
Parts corresponding to those shown in FIGS. 1 and 2 are denoted by the same reference numerals.

Reference numeral 52 denotes a commercial power supply of AC 100 V. The current from the commercial power supply 52 is supplied to the work coil 10 through the rectifier circuit 53 and the triac 5
The heat is supplied to the heater 13, the shoulder heater 33, and the fan motor 16 through 4, 55, and 56, respectively. The current from the commercial power supply 52 is stepped down by a step-down transformer 57 and then supplied to a microcomputer control unit 60 via a rectifier circuit 58 and a stabilized power supply 59.

On the other hand, a control signal from the microcomputer control unit 60 is input to a pulse width modulation circuit 61, and is input to the IGBT drive circuit 62 and the synchronization trigger circuit 63 via the pulse width modulation circuit 61. The control signal from the IGBT drive circuit 62 is a power transistor 6
4 is excited, and the work coil 10 is operated by a signal input from the synchronous trigger circuit 63.

On the other hand, the triac control signal from the microcomputer control unit 60 is input to the triacs 54, 55, 56 via the triac drive circuit 65,
The warming heater 13, the shoulder heater 33 and the fan motor 16 are operated according to the output value.

In the drawing, reference numeral 66 denotes a power feedback circuit, 67 denotes a reset circuit, 68 denotes an oscillation circuit, 69 denotes a backup battery, 70 denotes a triac drive power supply circuit,
1 is a buzzer circuit.

The microcomputer control unit 60
Has a function as heating amount control means for controlling the amount of heating of the work coil 10, the heat retaining heater 13, and the shoulder heater 33 according to the temperature detected by the center sensor 8, and is detected by the center sensor 8. The boiling temperature and a temperature lower than the boiling temperature by a predetermined time for a predetermined time after the inner pan temperature T reaches the boiling temperature T ₂ (see FIG. 5).
Boiling a function as a first timer for setting a boiling Teng keeping time t ₁ that to maintain temperature, first the boiling Teng maintaining time after elapse of the set boiling Teng keeping time t ₁ by the timer with the Boiling temperature is reached with a heating amount lower than the heating amount at t ₁
To a temperature lower than the boiling temperature by a predetermined time for a predetermined time
And a function of a second timer for setting the heating maintaining time t ₂ to only maintain. Incidentally, boiling Teng maintenance time t ₁ that will be set by the first timer, the contents from the inner pot temperature T reaches the boiling temperature T ₂ (i.e., rice and water) reaches the actual boiling temperature the temperature is It is desirable to set the time until.
Also, the heating maintenance time t set by the second timer
₂ will vary by thickened with the degree of porridge, it is desirable to be 1 / 3-1 / 2 of about boiling keeping time t _1.

Next, several embodiments in which rice porridge is cooked using the electric rice cooker having the above configuration will be described.

Embodiment 1 (corresponding to claim 1) FIG. 4 is a flowchart showing the content of the porridge cooking control according to Embodiment 1.

[0035] First, the operation data of various switches of the operation panel 36 as described above is read in step S _1. Then, the menu that is currently selected in the step S ₂ a determination is made whether a "porridge".

[0036] As a result, the process proceeds to step S _3, if an affirmative determination is made to control the energization of the work coil 10 to a predetermined output value, increasing the temperature T of the inner pot 3 to water temperature T ₁ ° C. of 5 To perform water absorption for a predetermined water absorption time t ₀ (water absorption step).

[0037] Then, (in other words, whether or not water time t ₀ has elapsed) whether or water absorption is completed in the water process in step S ₄ a determination is made, wherein when an affirmative determination is , the process proceeds to step S _5, the output value of the work coil 10 is energized the control set to full power of 16/16, boiling as illustrated in FIG. 5 the temperature T ₂ (= 10
0 ° C).

[0038] Thereafter, step proceeds to S _6, the result of the heating in the full power state, the temperature T is the boiling temperature of the inner pot 3 T
Whether reaches _second decision is made, wherein when the determination is positive, the process proceeds to step S _7, the timer operation of the first timer t ₁ (e.g., t ₁ = 1800 seconds) (i.e., decrement ) simultaneously with the start, and controls energization down to 4/16 the output value of the work coil 10 in step S _8.

Then, the temperature T of the inner pot 3 decreases due to the decrease in the amount of heating by the work coil 10, but the step S
_{In 9} the inner pot temperature T becomes the power-up temperature T ₃ (for example,
T ₃ = 99 ℃) makes a determination of whether or not drops below, wherein if the determination is positive, the process proceeds to step S _10, sets the output value of the work coil 10 to full power 16/16 and energization control to, the inner bowl temperature T is determined whether increased to the boiling temperature T ₂ or higher in step S _11. Here, until the affirmative determination is heated at full power state is continued, and if an affirmative decision is made, the process returns to step S _8, and the energization control by lowering again the output value of the work coil 10 to 4/16, step S comparison between the inner pot temperature T and the power-up temperature T ₃ is made at _9.

By controlling the energization as described above, the inner pot temperature T
Is maintained between T ₃ (= 99 ° C.) and T ₂ (= 100 ° C.), and as a result, boiling is maintained.

[0041] The first boiling maintained, (in other words to the first decrement timer t ₁ is determined to have ended in step S _12, 1800 from the boiling temperature reached
(Until the second elapses).

[0042] Step S ₁₂ smell boiling Te Teng keeping time t ₁ is determined to have elapsed, the timer operation of the second timer t ₂ in step S ₁₃ (e.g., t ₂ = 900 seconds) (i.e., decrement) When you start at the same time, in step S ₁₄ the output value of the work coil 10 2/1
The current is controlled to be reduced to 6. That is, the heating of the inner pot 3 is carried out by heating amount smaller heating amount in boiling Teng maintaining time t _1. Then, due to the reduction in the amount of heating by the work coil 10, the temperature T of the inner pot 3 is increased as shown by a chain line in FIG.
Is slightly reduced, and the spill-over is prevented.

[0043] The heating maintained until the second decrement the timer t ₂ is determined to have ended in step S ₁₅ (in other words, from the boiling temperature reached until after 900 seconds) is continued, the step S ₁₅ If an affirmative determination is made in, the process proceeds to step steaming stops the energization of the work coil 10 in step S _16.

As described above, according to the present embodiment, whether the inner pot temperature T has reached the boiling temperature T ₂ during rice cooking with porridge.
Luo boiling Teng boiling by a predetermined heating amount until the maintaining time t ₁ has elapsed temperature (e.g., 100 ° C.) than with the boiling temperature
Boiling temperature between a predetermined temperature and a lower temperature (for example, 99 ° C.)
Maintaining, after the lapse of boiling Teng keeping time t _1, a predetermined than the boiling temperature so as not to reach only the boiling temperature heating maintaining time t ₂ at a heating amount smaller than the amount of heating in the boiling Teng maintaining time t ₁
Temperature lower temperatures (e.g., 99 ° C.) for so as to maintain, in the heating maintaining time t ₂ is decided to slightly maintain the lower temperature. Therefore, a delicious porridge can be cooked without spilling over.

Second Embodiment (corresponding to Claims 1 and 2) FIG. 6 shows the porridge cooking control according to the second embodiment.
Flowchart for the setting of boiling Teng maintenance time t ₁ and the heating maintaining time t ₂ is shown Te.

In this case, the first
And that by the second timer boiling Tengchong maintenance time t ₁ and heating Wei
And so as to change the lifting time t _2.

First, in steps S ₁ and S ₂ , the size of the inner pot 3 is determined. If small = 100, t ₁ is determined in steps S ₃ and S ₄ .
= 1800 seconds, set t ₂ = 600 seconds, when a medium = 150 size, set in step S ₅ and step S ₆ t ₁ = 1680 seconds and t ₂ = 900 seconds, large =
When the size is 180, t ₁ is set to 1980 seconds and t ₂ is set to 600 seconds in steps S ₇ and S ₈ .

[0048] the set boiling Tengchong maintenance time as described above t ₁
And porridge cook up control is executed according to the flowchart shown in FIG. 4 on the basis of the heating maintaining time t _2.

In this way, it is possible to control the amount of heating corresponding to the size of the inner pot 3, thereby making it possible to cook good porridge and to cook more delicious porridge.

Third Embodiment (corresponding to Claims 1 and 3) FIG. 7 shows the porridge cooking control according to the third embodiment.
Flowchart for the setting of boiling Teng maintenance time t ₁ and the heating maintaining time t ₂ is shown Te.

[0051] In this case, the contents contained in the inner pot 3 (i.e., rice and water) in an amount (in other words, if the number of judgment) by that boiling Teng keeping time to the first and second timers in response to t ₁ and
And so as to change the heat maintaining time t _2.

The determination of the total number is made between the end of the water absorption step and the end of the cooking step. For example, when the predetermined temperature range (for example, 68 ° C. to 88 ° C.) is equally divided (for example, 30 equally) at predetermined intervals in the cooking process, and the inner pot temperature T is controlled so as to be the respective temperature. This is performed by comparing the integrated value of the OFF time of the work coil 10.

[0053] to start the 7 second timer in step S _1, the set value Tm and the inner pot temperature T in step S ₂
(M = 1 to 30). Where T <T
If it is determined that m, in step S ₃ work coil 10 is turned ON by the output value = 16/16, when it is determined that T ≧ Tm, work coil 10 in step S ₄ is O
Is FF are OFF, OFF time integrated value t (total) is stored in step S _5.

[0054] When the 7 second timer in step S ₆ is determined to have counted up, it is determined whether a m = 30 in step S ₇ is, step S in the case of a negative determination is made here _Go to ₈ , m → m +
It returns to step S1 as ₁ and repeats the subsequent processing. By repeating the same processing until m = 30, an integrated value t (total) of the OFF time of the work coil 10 is obtained.

[0055] Then, if it is determined that m = 30 in step S _7, if the number of determination is made in step S ₉ and step S _10, Contact <br/> had been boiling Teng kept to step S ₁₁ ~ Step S ₁₆ The time t ₁ and the heating maintenance time t ₂ are set.

That is, in steps S ₉ and S ₁₀ , the integrated value t (total) and the set values A, B, C
Comparison with is made, A ≦ t (to in step S ₉
tal) <B (i.e., the amount of the contents when it is determined that the large) is, t ₁ in step S ₁₁ and step S ₁₂
= 1800 seconds, t ₂ = 900 seconds, and step S
In _{10 B ≦ t (total) <} C ( i.e., the amount of contents inside) when it is determined that is set in step S ₁₃ and step S ₁₄ t ₁ = 1800 seconds and t ₂ = 600 seconds in step S ₁₀ t (total) ≧ C
(I.e., the amount of contents small) when it is judged that the, t ₁ = 1600 in step S ₁₅ and step S ₁₆
Seconds, t ₂ = 600 seconds.

[0057] the set boiling Tengchong maintenance time as described above t ₁
And porridge cook up control is executed according to the flowchart shown in FIG. 4 on the basis of the heating maintaining time t _2.

In this manner, the heating amount can be controlled in accordance with the amount of the contents of the inner pot 3, so that a good porridge can be cooked and a more delicious porridge can be cooked.

The present invention can be applied to a rice cooker for rice cooked with porridge, and can also be applied to a device using a hot plate type electric heater as an inner pot heating means.

[0060]

According to the present invention according to the present invention, until the inner bowl temperature elapses Heck et boiling Teng maintenance time reaches the boiling temperature (i.e., an inner pot temperature and the contents temperature deviates during porridge cooking Time) is the boiling temperature according to the predetermined heating amount
And then <br/> maintain boiling temperature between a predetermined temperature lower temperature than the boiling temperature, after the lapse of boiling Teng maintenance time, heating lifting time heating amount smaller heating amount in the boiling Teng maintaining time (i.e. , since in order to maintain the inner bowl temperature and the contents temperature and is approximately equal going on time) a predetermined temperature lower temperature than the boiling temperature only, with the boiling Teng maintenance time enables good porridge cooked up, heating In the maintenance time, a slightly lower temperature can be maintained, and there is an excellent effect that a delicious porridge can be cooked without spilling over.

The boiling maintenance timeAnd heating maintenance time
Is changed according to the size of the inner pot or the amount of contents
If so, the size of the inner pot or the amount of contents
Can control the heating amount corresponding to
We can cook yuzu and cook more delicious porridge
Can be.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an example of an electric porridge pot (ie, an electric rice cooker) according to an embodiment of the present invention.

FIG. 2 is a front view of an operation panel in an example of an electric porridge (ie, an electric rice cooker) according to the embodiment of the present invention.

FIG. 3 is a circuit diagram showing a connection state of electric elements in an example of an electric porridge pot (ie, an electric rice cooker) according to an embodiment of the present invention.

FIG. 4 is a flowchart showing the content of porridge cooking control (Example 1) in an example of an electric porridge pot (ie, an electric rice cooker) according to the embodiment of the present invention.

FIG. 5 is a time chart showing the content of porridge cooking control (Example 1) in an example of an electric porridge pot (ie, an electric rice cooker) according to the embodiment of the present invention.

[6] One example of an electric porridge pot according to the embodiment of the present invention (i.e., electric cooker) a flow chart showing a boiling Teng maintenance time and purpose of the heating maintaining time of porridge cooked in raising control (Example 2) is there.

[7] An example of an electric porridge pot according to the embodiment of the present invention (i.e., electric cooker) a flow chart showing a boiling Teng maintenance time and purpose of the heating maintaining time of porridge cooked up control in (Example 3) is there.

[Explanation of symbols]

3 is an inner pot, 8 is a temperature detecting means (center sensor), 10
Is a heating means (work coil), 36 is an operation panel, 60
Is a microcomputer control unit.

Claims (3)

(57) [Claims] A heating means for heating the inner pot; a temperature detecting means for detecting a temperature of the inner pot; And an electric rice porridge having the boiling temperature and the boiling temperature for a predetermined time at a predetermined heating amount from when the inner pot temperature detected by the temperature detecting means reaches the boiling temperature.
Keep the boiling temperature between a predetermined temperature lower than the temperature
A first timer for setting a boiling Teng maintenance time, brought to the boiling temperature lower heating amount than the heating amount in the boiling Teng maintaining time after elapse of the set boiling Teng maintenance time by the first timer
To a temperature lower than the boiling temperature by a predetermined time for a predetermined time
Electric porridge pot, characterized in that annexed a second timer for setting a heating maintenance time to only maintain. Wherein said first and second boiling that will be set by the timer Teng maintenance time and the heating holding time, said characterized in that become to be changed corresponding to the size of the inner bowl An electric porridge pot according to claim 1. Wherein said first and second boiling that will be set by the timer Teng maintenance time and heating maintenance time, it has become to be changed corresponding to the amount of the contained contents in said pot The electric rice cooker according to claim 1, wherein: