JPH06317331A - Automatic cooker - Google Patents

Abstract

PURPOSE:To enhance safety of an automatic cooker in which a gas flow rate controller for controlling a gas flow rate is driven by a motor. CONSTITUTION:The automatic cooker comprises heating means 48 for heating a material to be cooked, heat quantity control means 53 for controlling heat quantity of the means 48, electronic control means 62 for controlling the means 53, and operating means 25 for inputting an ignition/extinguishing to the means 62. Since the means 53 has a gas flowrate controller 57 for regulating a gas flow rate, a motor 59 for driving the controller 57 and means 55 for shutting OFF a gas passage when the motor malfunctions, no gas flows out to improve safety.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic cooker which is used in a gas cooker such as a gas table and which drives a heat quantity control means for controlling the heat quantity of a heating means by a motor.

[0002]

2. Description of the Related Art In a gas table in a conventional gas appliance of this kind, the heat power is controlled by manually rotating a gas cock to supply and stop the gas to the gas burner and adjusting the flow rate.

FIGS. 14 and 15 show the gas table, which is provided with gas burners 1 and 2 on the left side and the right side, and a grill section 3 used for grilling fish and the like between them. Then, the manual operation knobs 4, 5, 6 provided on the front operation portion are operated to open / close the gas cocks 7, 8, 9 to open the left gas burner 1,
I was igniting and extinguishing the grill part 3 and the right gas burner 2 and adjusting the gas flow rate. Further, the gas leakage prevention, the thermoelements 10a, 10b, 10c for the safety device, the safety valves 11a, 1
Actually, it is equipped with 1b and 11c.

In the figure, 12 is a top plate, 13 is Gotoku, 14 is a grill door, 15 is its knob, and 16 is an exhaust hole of the grill part 3.

[0005]

In this conventional gas table, the knobs 4, 5 and 6 are manually rotated to ignite and extinguish the cock by opening and closing the cock, and the gas flow rate is adjusted by the degree of opening of the cock, so that the operation is extremely difficult. It was complicated and the control of firepower was difficult. In terms of safety, although there is a raw gas leak prevention device that uses a safety valve such as a solenoid valve, a safety device such as a tempura fire prevention device, an automatic fire extinguishing device that forgets to turn off after leaving for a long time after burning, a charring prevention device, etc. It was not provided and automated various cooking such as temperature control function, and it was a means only for burning only without providing convenience and peace of mind.

The present invention solves the above-mentioned problems of the prior art, and provides a safe automatic cooker.

[0007]

To achieve the above object, an automatic cooker according to the present invention comprises a heating means for heating a cooked food, and a heat quantity control means for controlling the heat quantity to the heating means.
An electronic control means for controlling the heat quantity control means; and an operation means for inputting ignition and extinguishment to the electronic control means, wherein the heat quantity control means controls a gas flow rate, and a gas flow rate control body. And a means for cutting off the gas passage when the motor is abnormal.

[0008]

With the above-described structure, the present invention provides a safe cooker because it shuts off the gas passage in the event that the motor becomes abnormal due to a power failure or a wire breakage.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of an automatic cooker according to the present invention will be described with reference to FIGS.
This will be described with reference to FIG. FIG. 1 shows an automatic gas cooker according to the present invention. Reference numeral 17 denotes a horizontally long appliance main body in which left and right stoves 19 and 20 are arranged side by side on a point plate 18. Grill part 21
Is provided on the lower part of the left stove 19 and the left end of the instrument body 17. The grill part 21 is provided with a door 23 with a knob 22 for loading and unloading food on the front of the appliance body.
In addition, an exhaust hole 24 for the combustion gas is opened in the rear central portion of the top plate 18. The keyboard 25, which is the operation unit, is the grill unit 2.
1 and the heat insulating portion 26 having a predetermined width W, and is located at the right end of the instrument body 17. FIG. 2 is an enlarged view of the keyboard 25. The keyboard 25 controls a gas control unit 53 (details will be described later) that performs gas supply and stop of the left and right stoves 19, 20 and the grill unit 21, and gas flow rate control. A plurality of keys for inputting control conditions to the electronic control unit 62 including a microcomputer and the like are provided. In the keyboard 25, the right and left stoves 19 and 20 and the grill portion 21 have ignition and fire extinguishing keys 27, 28 and 29, large heat adjusting keys 27a, 28a and 29a, and small heat adjusting keys 27b and 28, respectively.
b, 29b, the combustion display lamps 27c, 28c, 29c indicate the combustion of the left and right stoves 19, 20 and the grill portion 21,
It is also a display lamp that also serves as an indication of the magnitude of the gas flow rate (the magnitude of the thermal power). The combustion indicating lamps 27c, 28c,
Each of 29c is composed of a plurality of lamps, and when the left stove is taken as an example, the gas flow rate adjustment range (from large thermal power to small thermal power)
In order to control the range of 5 in five stages, the control thermal power stage is set in advance in the gas control unit 53 and the electronic control unit 62, and the five combustion display lamps 27c are lit when the thermal power is the maximum, and the combustion display lamps are the minimum when the thermal power is the minimum. In 27c, one lamp is turned on, and the lamp is turned off when combustion is stopped. The right stove section 20 has an automatic cooking function, including an automatic rice cooking key 30 and an automatic boiling detection key 3
1, 32, 33, 34, 35, automatic temperature control key 36,
Temperature setting knob 37, cooking timer display section 38 also serving as a clock, time limit notification selection key 39, time limit automatic fire extinguishing key 40,
The time adjustment keys 41 and 42 and the clock adjustment key 43 are included. The energizing switch 44 is provided on the front surface of the instrument main body 17 for the purpose of preventing mischievous use by children and saving electricity, and the operation lamp 45 is a lamp indicating an energized state.

FIG. 3 is a gas and electric circuit diagram. The left burner 46 of the left stove 19, the burner 47 of the grill part 21,
The burner 48 of the right stove 20 includes combustion detection sensors 46a, 47a, 48a and ignition discharge electrodes 46b, 47, respectively.
b, 48b, and ignition discharge electrodes 46b, 47b, 48
b is connected to an igniter 63 controlled by the electronic control unit 62. The right stove 20 is provided with a temperature sensor 49 which is a temperature detecting means for detecting the temperature of the bottom of the pan and inputting the detection signal to the electronic control unit 62. Burner 46,
Regarding the gas control section 53 which is a heat quantity control means for controlling the heat quantity to 47 and 48, each stove 19 and 20, the grill section 2 are provided.
Since 1 and 2 have the same structure, an example will be described. A nozzle 51 is provided in the mixing pipe section 50 of the right stove burner 48 to control the maximum flow rate of the gas supplied to the burner 48 of the right stove 20. The nozzle 51 is connected to the gas control unit 53 by a gas pipe 52.

The gas enters the right stove burner 48 through the gas inlet 54 and the solenoid valve 55. Gas control unit 53
A gas flow rate control plate 56, a flow rate control body 57 for adjusting the flow rate of gas by rotating, and a flow rate control body 5 are provided therein.
Encoder 58 for detecting the rotation angle of 7 and motor 5
9 and an electronic control unit 62 and lead wires 60a, 6
Bound at 0b.

Therefore, by pressing the ignition key 29 of the keyboard 25, a control signal is input to the electronic control unit 62,
The signal from the electronic control unit 62 is used to drive the motor 59.
Is rotated, the flow rate control body 57 is automatically rotated to the angle indicated by the encoder 58, and the electromagnetic valve 55 is opened, so that a predetermined gas flow rate is supplied to the right stove burner 48. The solenoid valve 55 includes a motor 59, an encoder,
In case of trouble such as lead wire failure or disconnection, or when power is not supplied due to stop power or the like and control becomes impossible, safety measures are taken to shut off gas.

In the above embodiment, when the ignition key 29 of the keyboard 25 is pressed, a signal is input to the electronic control section 62. Then, a signal is sent from the electronic control unit 62 to the gas control unit 53, the motor 59 rotates, and at the same time the solenoid valve 55 opens,
The flow rate controller 57 and the encoder 58 also rotate in association with the rotation of the motor 59. Then, the rotation angle of the flow rate control body 57 and the gas flow rate determined by the gas flow rate control plate 56 are supplied to the right stove burner 48 through the nozzle 51. Then, this gas is ignited and burned by the spark of the discharge electrode 48b connected to the igniter 63 operated by the signal from the one electronic control unit 62. When the user wants to adjust the thermal power, for example, when he wants to reduce the thermal power, when the small thermal power control key 29b is pressed, the control signal is input to the electronic control unit 62, while the rotation angle of the flow rate control unit 57 up to now is detected by the encoder 58. The electronic control unit 62 is informed that this angle detection is different from the angle in which the heat power is reduced, so a signal from the electronic control unit 62 that confirms this is sent to the motor 59 to reduce the heat power. The flow rate control body 57 is rotated by a motor 59 at a predetermined angle
Is to rotate to adjust the fire power to a small level. Of course, if the flow rate control body 57 rotates to a predetermined position, the power supply to the motor 59 is stopped. Further right stove 48
When the fire extinguishing key 29 is pressed to extinguish the fire, the signal is transmitted to the electronic control unit 62 and the motor 59 in the same manner as described above.
Since the signal of the position of the flow rate control unit 57 from the encoder 58 is input to the electronic control unit 62, the flow rate control unit 57 is
The gas is stopped by rotating it to a predetermined position.

In the above description of the embodiment, ignition, extinguishing, and heat power adjustment have been described.
Since all the adjustments are made electrically, according to the present invention, the pot 6 placed on the right stove 20 is used as shown in FIG.
4 is provided with a temperature sensor 49 for detecting the temperature of the bottom of the pot, and the completion of cooking and the detection of abnormally high temperature are sent to the electronic control unit 62 to send a signal to prevent tempura fire, and the motor 59 is rotated to control the flow rate control unit 57. You can also close it. Originally, the cooking stove was subjected to various kinds of cooking based on experience and intuition, and there was an inherent variation in the cooking result. However, the present invention is intended to provide an automatic cooking device incorporating the above-mentioned combination cooking know-how. . Therefore, a block diagram is shown in FIG.

In the electronic control unit 62, gas control unit control means 62 for controlling the above-mentioned gas control unit 53 and igniter 63.
a, an input signal from the keyboard 25 and the keyboard 25
Input for outputting a display signal to the display, display control and cooking input determination means 62b, timer control means 62
c, A / D conversion means 62D for converting the voltage from the pan bottom touch type temperature sensor 49 for detecting the pan bottom temperature of the pan 64 containing the cooked food into a digital signal, and the signal result passed through the A / D conversion means, Abnormally high temperature (tempura fire prevention),
In order to control the temperature, the time, and the heating power suitable for the cooking purpose according to the temperature abnormality sensing means 62E for judging the disconnection state of the temperature sensor 49 and the like, the signal result passing through the A / D conversion means,
A cooking determination unit 62F that holds a control sequence for each type of cooking is provided. Further, a raw gas prevention sensing means 62G for preventing raw gas is provided by knowing the state of thermoelectromotive force of the right stove thermocouple 48a for detecting the combustion state of the right burner 48. As described above, it is an object of the present invention to provide an automatic cooker that incorporates various means, which have not been found in the conventional stove, in the electronic control unit in terms of cooking purpose, safety and the like.

(1) One of them is an automatic rice cooking function. This is a device that automatically cooks delicious rice on the stove and incorporates a means to easily cook delicious rice. Put the rice that has been washed and adjusted in water in a pan, put it on the right stove 20, press the ignition / extinguishing key 29, and then press the rice cooking key to cook delicious rice.

That is, the amount of cooked rice is automatically determined, the heating power suitable for the amount of cooked rice is automatically supplied, and the boiling point is obtained. After boiling, the amount of cooked rice is adjusted to maintain a long time for promoting the gelatinization of rice. After switching to the combined boiling heat power and cooking, additional cooking can be done to evaporate excess water. This state is shown in FIGS.

FIG. 6 shows rice cooked in the cooking determination means 62F.
Fig. 7 shows various determination means of the functional part, and Fig. 7 shows dots on the horizontal axis.
The time elapsed after the fire is shown, and the vertical axis shows the thermal power state and the pot bottom, respectively.
Shows the temperature (temperature detected by the temperature sensor 49) curve
is there. In the figure showing the state of thermal power, the diagonal line to the left shows the amount of rice cooked.
Regardless of the lowest calorie to burn, falling to the right
The shaded area indicates the calorie portion that changes depending on the amount of rice cooked
There is. After ignition, the pan bottom temperature curve shown by the solid line changes with time.
Rising t₁By the time x₁Whether to reach the temperature
The first rice cooking capacity determination means 65 determines. After ignition above
t₁Up to the time, maximum calories regardless of the amount of rice cooked
Supply less constant calories than First rice cooking capacity
As a result of the judgment by the judgment means 65, x₁When the temperature is reached
(Pan bottom temperature curve 1) is the second rice cooked without changing the heating power.
It goes to the capacity determination means 66, but if it has not reached it (pot bottom temperature
2) is the second cooking capacity determination means 6 after increasing the heating power.
Go to 6. The first rice cooking capacity determination means 65 t₁X in time₁
If the temperature has not been reached, the determination 66 of the second rice cooking capacity determination means is a pan.
Bottom temperature is x₁Time at which temperature (80 ° C in this case) is reached α₁When
Similarly x₂Time when the temperature reaches 90 ° C in this case α₂
Time difference of (α₂-Α ₁) = K₁Ask for. Second cooked rice capacity
K for the setting means 66 in advance₁Depending on the value of
Combined with the numerical value of the control range of 5-step control (K₁Is small
Firepower 5 if it is high, heat power 1 if it is high K₁To the value of
It will be switched and supplied.

On the other hand, when the first rice cooking capacity determining means 65 reaches the x ₁ temperature (80 ° C. in this case) within t ₁ hours, the second rice cooking capacity determining means 66 keeps constant from when the x ₁ temperature is reached. The temperature rise value K ₂ after the time (K seconds) is determined.

[0020] the magnitude of the second cooking capacity determining means in this case the value of the above-described temperature rise value K ₂ is in the 66, firepower 7 5
Combined with the numerical value of the control range of stepwise control (if K ₂ is small, thermal power is 5, if K ₂ is large, thermal power is 1) K ₂
The heating power is determined by the second rice cooking capacity determination means 66 according to the value of, and the heating control is instructed to the gas control part control means 62a to switch the heating power and cook until boiling. When the temperature after K seconds is as close as possible to the boiling temperature, after the boiling, the second cooked rice is heated to a heat power (heat power 1 in this case) smaller than the heat power used in the first rice cooking capacity determination 65 (heat power 3 in this case). Capacity determination means 6
6 determines.

As for the boiling temperature, as shown in FIG. 7, the temperature of the cooked food (rice and water in this case) is not directly measured, but the temperature of the bottom of the pan is measured. Even if the temperature reaches 100 ° C, the pot bottom temperature is higher than 100 ° C.
It varies from about 00 to 107 ° C. In the present invention, paying attention to the fact that the pot bottom temperature is saturated when the boiling temperature is reached, and the temperature difference (temperature gradient) of the pot bottom temperature per unit time is calculated in the boiling determination means 67, and the temperature gradient is a constant value. It is equipped with a means to judge that it has boiled when the following occurs.

According to the above method, after the boiling determining means 67 determines that the boiling is boiling, the gas control section controlling means 62a switches to the heating power after boiling determined by the second rice cooking capacity determining means 66, and waits until the cooking is completed. . Cook up the pan bottom temperature there is no water in the pot is soaring, x ₄ temperature (in this case 1
The temperature rises to 50 ° C., and the determination means 68 determines that the temperature has risen to the minimum heat power state. Normally, you can finish cooking rice at this stage, but the water drops inside the pot and the taste of the rice drops. In other words, in this state, excess water still remains in the rice. In order to remove this water, the additional cooking determination means 69 performs additional cooking. The cook-up determination means 69 has a 5-minute timer, and after the cooked-up determination is made, this timer is activated, and 5 minutes later, the cook power correlated with the heat power determined by the second rice cooking capacity determination means 66 is added to the cook-up determination means 69. With the heating power determined in step _{3, the} temperature is set to x3 (120 ° C in this case) and the fire is automatically extinguished.

In addition, when color-added rice such as cooked rice (which is mixed with soy sauce, oil, etc.) is additionally cooked, charring is likely to occur, so that additional rice may not be cooked. When additional cooking is unnecessary, it is possible by pressing the point extinguisher key 29, pressing the rice cooking key 30 and then pressing the rice cooking key again, and the key input reception display control and the cooking input determination means determine that the rice is cooked. I am training. In this state, it is considered that pressing the rice cooking key again will return to the rice cooking state (pressing this will repeatedly select).

(2) One of them is a temperature control function. Place the frying pan on the right stove 20, press the ignition / extinction key 29, and then press the temperature control key 36. After that, the temperature is adjusted to the target temperature with the temperature control knob 37. Cooking timer 3
When using 8, the notification key 39 (only informs when time is up), the cut key 40 (notifies when time is up,
Select one of the keys (automatic extinguishing) and press it.

The lamps 39a, 40a mounted in the notification key 39 and the cut key 40 are distinguished by blinking while the timer is operating, turning on until the set temperature is reached, and turning off when not in use.

Subsequently, the hour key 41 and the minute key 42 are set to the target cooking time. In FIG. 8, the horizontal axis shows the time elapsed after ignition, and the vertical axis shows the pot bottom temperature, the thermal power state, the timer state, and the states of various lamps. When the pan bottom temperature reaches the set temperature, the temperature notification lamp 36a in the temperature control key 36 changes from a blinking state to a lighting state and a buzzer simultaneously notifies. At the same time, the cooking timer 38 starts to operate and the lamp changes from a lighting state to a blinking state. In order to control the temperature state of the temperature sensor 49 and the temperature difference between the set temperature within the temperature adjustment function part within the cooking determination means 62F within the electronic control part 62 within the temperature difference between β ₁ and β ₂ shown in FIG. It has the function of controlling and maintaining the heat power in high and low heat conditions. In the above state, when the time set by the cooking timer 38 has passed, for example, when the cut key 40 is being pressed, the automatic fire extinguishing will be notified by the completion buzzer.

Actuating the cooking timer when the set temperature is reached coincides with the cooking time (time that does not include preparation time such as preheating the frying pan or the like to the set temperature in advance), which is a convenient way to use the timer.

(3) One of them is a boiling detection function. Place the pan containing the food on the right stove 20 and turn off the ignition key 29
Press, for example, the automatic boiling detection key 33. Then, the lamp 33a of the automatic boiling detection key 33 blinks.
Around the time, when using the cooking timer 38, a notification key 39 (only when the time is up), a cut key 40
Select and press any key of (Notify when time is up and automatically extinguish). For example, the cut key 40 is pressed, and the hour key 41 and the minute key 42 are pressed to set the desired time.
By performing the above operation, the temperature sensor 49 detects the temperature of the bottom of the pan, and when the food is boiled, the lamp 33a of the boiling detection key is automatically turned on and the heating power is shown from FIG. The cooking timer 38 starts operating from that point when the calorific value of the heat power 2 is reduced, and when a predetermined set time elapses, the fire is automatically extinguished and the completion buzzer notifies the user. 9 and 10 show the state.

FIG. 10 shows various determination means of the boiling detection function section in the cooking determination means 62F, and FIG. 9 shows the time elapsed after ignition on the horizontal axis and the thermal power state on the vertical axis.
It shows the pot bottom temperature and the temperature of the cooked food.

As shown in FIG. 9, even if the temperature of the cooked product reaches 100 ° C. as shown in the temperature curve of the cooked product, the pot bottom temperature is about 106 ° C. as shown by the pan bottom temperature curve. Depending on the thickness of the pot, the material, the type of cooking, etc., the pot bottom temperature is 102-
There is a variation of about 120 ° C.

However, in most pans, the temperature of the cooked food is 10
When it saturates at 0 ° C, the pot bottom temperature also saturates at a slightly higher temperature. The inflection point α at which the temperature rise curve until boiling in the pot bottom temperature curve becomes parallel indicates the boiling point for boiling detection. The temperature (boiling point α + 15 deg) obtained by adding a temperature difference (15 deg in this case) obtained by subtracting the boiling point (100 ° C. in this case) of the cooking product from the temperature (eg 115 ° C.) KG just before the food begins to burn to this boiling point α It has a function of determining that the value KG ′ is the non-sticking temperature by the non-sticking determination means 71 and automatically extinguishing when the predetermined temperature KG ′ is reached and informing by a buzzer. Accordingly, when the cooking timer 38 is used and the timer is set longer than necessary, when the burning prevention temperature KG 'is reached earlier than the cooking timer time, the fire is automatically extinguished, and the cooking timer can be used with confidence. The setting of the cooking timer is the same as that of the temperature adjusting function, and therefore its description is omitted.

(4) One of them is a boiling water function. As a result of the fact-finding survey on the use of the two-burner stove, it was the boiling water function that was most frequently used.

That is, it is a function of extinguishing the fire when hot water is boiled. When the ignition / extinction key 29 is pressed, the key input acceptance display control and cooking input determination means 6 in the electronic control unit 62 shown in FIG.
2b automatically determines the boiling mode, and the cooking determination means 6
The state is set to be the same as when the water heating key 31 of the boiling detection function section in 2F is pressed. Therefore, the boiling water function that is most frequently used is made possible with one touch.

(5) One of them is a cooking timer function.
As described in the section on the boiling detection function and the temperature adjustment function, the cooking timer function has been described. The cooking timer 38, which has been set in advance, starts operating after boiling or reaching the set temperature. , It can also be used as an ordinary stove function (see Fig. 11). That is, when the ignition / extinction key 29 is pressed and the large heat power adjustment key 29a or the small heat power adjustment key 29b is pressed, the key input acceptance display control and cooking input determination means 62b determines the normal stove function, and the operation state shown in FIG. Becomes In FIG. 11, the horizontal axis shows the time elapsed from ignition, and the vertical axis shows the temperature state, the thermal state, and the timer state. After ignition, the pot bottom temperature is 48
As a result, the temperature rises and it becomes a boiling state. When the heating power is narrowed down, the key input acceptance / display control and cooking input determination means 62b are associated with the small and large heating power adjustment keys 29b and 29a and the heating power adjustment display lamp. When the small heat power adjustment key 29b is pressed, each time the key is pressed, the step down is made from the heat power 5 to the heat power 1 for each step. Further, the heat power state is displayed by the heat power adjustment display lamp 29c. The heating power is also increased by pressing the large heating power adjustment key 29a, as in the above.

When used in the ordinary stove function, the timer control means 62c in the electronic control section 62 operates from the time when the cooking timer is set. Considering safety,
Considering the state where the cooking timer 38 is not used, when the right stove 20 is used, that is, when the point fire extinguishing key 29 is pressed, the timer control means 62c is activated and it is determined that 2 hours have passed, and then the automatic fire extinguishing is performed. Gas control means 6
It is sent to 2a and the fire is extinguished automatically. That is, it has a timer function for preventing forgetting to erase.

Further, the timer control means 62c is provided with a cooking timer priority means when the cooking timer 38 is set for 2 hours or more.

Even when the right stove 20 is used in the above-mentioned ordinary stove mode, in order to prevent an abnormal temperature such as tempura, after the input of the temperature sensor 49 is passed through the A / D conversion means 62D,
Connected to the temperature abnormality sensing means 62E, the temperature sensor 49 is constantly checked for abnormal states (abnormal high temperature, sensor disconnection, etc.), and when an abnormality occurs, an abnormal signal is sent.
It is configured to be sent to a and automatically extinguished. Therefore, even if it is normally used on the stove, accidents due to abnormal overheating such as tempura fire can be prevented.

(6) One is an automatic tempura temperature control function. In order to fry the tempura well, it is a major factor to always get the most suitable temperature between about 160-180 ° C depending on the food. However, in the method of detecting the pot bottom temperature as shown in FIG. 4, the difference between the oil temperature and the pot bottom temperature is large, and the target temperature cannot be obtained depending on the amount of oil. is there. That is, the difference between the pot bottom temperature and the oil temperature depends on the pot material, thickness, and oil amount, and it is an important condition to match the oil temperature to the target temperature.

FIG. 12 and FIG. 13 show a concrete implementing means. FIG. 13 shows the cooking determination means 62 shown in FIG.
5 shows the execution means of the automatic tempura temperature control function unit of F. The pan 64 shown in FIG. 5 is heated by the right stove burner 48 and the temperature condition is A / D by the pan bottom touch type temperature sensor 49.
It is transmitted to the cooking determination means 62F through the conversion means 62D. The tempura temperature control function part of the cooking determination means 62F of FIG. 13 has a first pan type determination means 72, a second pan type determination means 73, an oil amount determination means 74, and a total temperature difference determination means 75.

In FIG. 12, the horizontal axis shows the time elapsed from the time of ignition, and the vertical axis shows the state of thermal power and the temperature of the pot bottom and the oil temperature, respectively. To adjust the oil temperature as shown in the above pan bottom temperature curves t ₅ ° C. The pan bottom temperature must be set it from the αdeg high t ₅ ° C.. This temperature difference α deg is, for example, about 4 when the thickness of the aluminum pan is 4 mm and the amount of oil is 1 liter.
It becomes 0 deg. That is, when the oil temperature is 180 °, the pot bottom temperature (set temperature of the pot bottom touch type temperature sensor 49) needs to be adjusted to 220 °. Another iron pan thickness 1.2m
From the experimental results, it is clear that when the oil temperature is 180 ° and the oil temperature is 180 ° in the case of m and the oil amount is 1 liter.

Both the pot bottom temperature and the oil temperature are t₀Ignited at a temperature
When A₁After a few seconds, the pot bottom temperature is t ₁°, oil temperature is 0₁゜
And temperature difference Δt₁Occurs. See A₁Second to A₂Up to seconds
In the meantime, the pot bottom temperature curve bends, but this tendency is due to heat transfer.
It comes out well in a thick pot with a good bottom. This generation mechanism
The heat conductivity of oil is about 1/3 of that of water, and the specific heat is twice as high.
There are some differences, and these are different from the heating condition of water.
Appears as a pan bottom temperature rise curve.

That is, when a thick pot having a good thermal conductivity is used, the heat of heating the pot is more consumed as heat for making the pot bottom uniform rather than being transferred to the oil at the beginning of ignition,
The above-mentioned temperature difference Δt ₁ appears significantly. or,
The curve of the pot bottom temperature curve that does not rise linearly and bends is due to the dew condensation state and usually occurs at around 70 ° C. On the other hand, in a thin pot with poor heat conduction (for example, stainless steel 0.5 mm), the temperature at the center of the pot bottom is less likely to be transmitted from the pot than through oil, and is often consumed to raise the temperature of oil. Therefore,
The temperature difference Δt ₁ becomes smaller. From the above, the temperature rise until the pan bottom temperature curve bends, that is, t ₁ -t ₀ is a coefficient representing the material thickness of the pan as the primary pan type determination,
It is set in the primary pan type determining means 72. The pot bottom temperature t ₂ ° at the time of A ₂ seconds has a great difference from the oil temperature O ₂ .
_{(T 2 -t 0), (} t 2 -t 1) it is also set in the secondary pot species determination coefficient within secondary pot type determination means 73. Next, the pot temperature rises to t ₃ and t ₄ °, but the oil temperature O ₃ at the time when the pot bottom temperature becomes t ₃ and the pot bottom temperature t ₄ ° when Aα seconds elapse and the oil temperature O ₄ In the meantime, t ₄ −t ₃ = Δt ₂ , O ₄
-O ₃ = Δt _2, that is, the temperature rise per unit time is the same. In other words, it was discovered that a temperature zone in which the pan bottom temperature curve and the oil temperature curve rise in parallel occurs in the fixed oil temperature range regardless of the pan and oil amount. t ₄ -t ₃ is the same as the temperature rise of the oil temperature, t ₄ when the combustion calories constant
The temperature difference of −t ₃ has a correlation with the oil amount, and is set by the oil amount determination means 74 as an oil amount coefficient. The total temperature difference determining means 75 calculates the coefficient set by the primary pan type determining means 72, the coefficient set by the secondary pan type determining means, and the coefficient set by the oil amount determining means 74, Calculate the temperature difference α between the oil temperature and the pan bottom temperature. And
The correction temperature obtained by adding the temperature difference α to the temperature set by the temperature setting knob 37 is set as the set temperature.

By using the above means, the temperature of the oil added with the correction temperature and the temperature of the bottom of the pot are made to coincide with each other, and the pot used in general households can be used immediately without limiting the amount of oil and the type of pot. I made it.

That is, the point extinguishing key 29 is pressed, and then the temperature adjusting key 36 is pressed. In this state, the temperature control lamp 3
6a blinks, but when the temperature adjustment key 36 is pressed again, the key input reception display control and the cooking input determination means make the determination, the tempura lamp 36b blinks, and the cooking determination means 62.
A signal indicating that the tempura temperature automatic control function is provided is sent to F. When the right stove burner 48 burns and reaches the set temperature after a lapse of time, an alarm is issued to obtain the proper temperature of the tempura.

In order to achieve the above-mentioned purpose, the right stove burner 4
Fig. 12 shows that the firepower of No. 8 is burned to a set temperature with high heat.
The thermal power time diagram is shown. In order to maintain the set temperature after reaching the set temperature, the control of high heat and low heat is performed through the gas control unit 53.

Since the use of the timer is the same as the above, it will be omitted. Further, the temperature of the bottom of the pan and the passage of time from the time of ignition include the time elapsed from the time of ignition operation and the time when the right stove burner 48 is ignited. The ignition detection method is omitted in the present invention.

(7) One of them is an erase-forgetting prevention timer that emphasizes safety. The right and left stoves 19 and 20 and the grill 21 are naturally different in frequency of use and usage time per time depending on the contents of cooking. In the present invention, each stove 19, 20 and grill 21 is provided with a timer incorporated in advance for each combustion section that operates from the time of ignition, and the automatic fire extinguishing is performed when the time set for each burns according to the actual usage. It is equipped with a forget-to-delete device that prevents accidents caused by forgetting to do so and is designed to emphasize safety.

To explain the left stove 19 as an example, when the fire extinguisher key 27 is pressed, a signal is input to the timer control means 62c through the key input acceptance display control and cooking input determination means 62b, and the left stove timer section in the timer control means. (Not shown) is counted in advance until a predetermined time is incorporated, and when the predetermined time elapses, a signal for extinguishing the fire is sent to the gas control unit control means 62a to automatically extinguish the fire.

[0049]

As described above, the heat quantity control means of the present invention has
The gas flow rate control body for adjusting the gas flow rate and the motor for driving the gas flow rate control body are provided, and the means for cutting off the gas passage when the motor is abnormal is provided. .

(1) When the motor is abnormal, it is considered that there is no power supply due to a power failure or disconnection, or the encoder that detects the rotation angle of the flow rate controller has a malfunction. However, the possibility of gas outflow occurs, but even in such a case, the safety can be secured because the means for blocking the gas passage is provided as in the present invention.

(2) In the case of having a plurality of heating means for heating the cooked food, an electromagnetic valve for shutting off the gas passage is provided in front of all the gas flow rate control bodies for adjusting the gas flow rate of each heating means. If provided, if any one of the plurality of motors for driving the gas flow rate control unit becomes abnormal, the electromagnetic valve can be operated to stop the outflow of gas, so that it can be economically implemented. In this case, there is also an effect of using less electric power and running cost.

[Brief description of drawings]

FIG. 1 is a perspective view of a gas table adopting an electronic control unit, a gas control body, and cooking means in an embodiment of the present invention.

FIG. 2 is an enlarged front view of the operation panel portion.

FIG. 3 is a gas supply control circuit diagram of the same.

[Fig. 4] Cross-sectional view of the relative positions of the pot, the temperature sensor, and the burner.

FIG. 5 is a block diagram of the automatic cooking control.

FIG. 6 is an explanatory view of the cooking determination means.

[Fig. 7] Relationship diagram between the state of thermal power and the pot bottom temperature when cooking rice

FIG. 8 is a relationship diagram between the temperature adjustment mode and the cooking timer.

FIG. 9 is a diagram showing the relationship between the boiling detection, the cooking timer, and the heating power state.

FIG. 10 is an explanatory view of the cooking determination means.

FIG. 11 is a diagram showing a relationship between a temperature state, a heating power state, and a cooking timer in the common stove mode.

FIG. 12 is a diagram showing the relationship between thermal power and various temperatures in the same tempura mode.

FIG. 13 is an explanatory view of the cooking determination means.

FIG. 14 is a perspective view of a conventional gas table.

FIG. 15 is a gas supply circuit diagram of the same.

[Explanation of symbols]

 25 keyboard (operation section) 48 burner (heating means) 53 gas control section (heat amount control means) 55 solenoid valve (gas passage shutoff means) 57 gas flow rate control unit 59 motor 62 electronic control section (electronic control means)

Claims (1)

[Claims] 1. A heating means for heating cooked food, a heat quantity control means for controlling the quantity of heat to the heating means, an electronic control means for controlling the heat quantity control means, and an input of ignition extinguishing or the like to the electronic control means. The heat quantity control means is composed of a gas flow rate control body for adjusting the gas flow rate and a motor for driving the gas flow rate control body, and means for shutting off the gas passage when the motor is abnormal is provided. Automatic cooker with the configuration.