JP3180079B2 - Cooking device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating cooker that detects the temperature of a cooking vessel with a temperature sensor and controls the amount of heating of a heat source so that porridge can be cooked based on the temperature detected by the temperature sensor. .

[0002]

2. Description of the Related Art Generally, the procedure for cooking porridge is to use a cooking vessel with a lid, such as a culture pot, to heat it with a large amount of heat and bring it to a boil, and then reduce the amount of heat so that appropriate stickiness occurs. The rice is cooked until it becomes soft. Since the amount of heating is reduced after boiling as described above, if the amount of heating is to be controlled automatically, it is necessary to detect the boiling point.

On the other hand, in order to automatically discriminate between cooking with water (cooking with a large amount of water such as boiled or boiled food) and cooking with oil (cooking such as fried food by heating cooking oil), the boiling state is determined. There has been proposed a heating cooker that detects the presence or absence of a boiling state and roughly classifies cooking with oil when the boiling state is detected, and cooking with oil if not detected. Therefore, it is considered that the application of such a boiling state detection technique can detect the boiling point even when cooking the porridge.

For the detection of the boiling state, a technique has been proposed in which attention is paid to the fact that the temperature change is small in the boiling state, and when an equilibrium state where there is almost no increase or decrease in the temperature change is detected, it is determined that the boiling has occurred. In other words, the temperature of the outer surface of the bottom of the heating container is detected by a temperature sensor such as a thermistor, and the temperature detected by the temperature sensor is sampled at regular time intervals. Then, it is determined that the equilibrium state has been detected. If the equilibrium state is detected in this way, the boiling point of the food in the cooking container can be determined with good reproducibility,
Even when rice porridge is cooked, it is considered that the timing for reducing the amount of heating and the timing for ending the cooking can be determined with reference to the detection point of the equilibrium state.

[0005]

However, an equilibrium state may not be detected depending on the amount of food and the amount of ingredients other than rice and water, and when the heat source for heating the cooking container is a gas burner. The equilibrium state may not be detected due to the fluctuation of the flame due to wind or the like. Therefore, if the timing for finishing cooking only at the time of detection of the equilibrium state is defined, when the equilibrium state is not detected, heating cannot be stopped, and there is a problem that the porridge burns.

The present invention has been made in view of the above circumstances, and an object thereof is to determine the timing of controlling a heat source based on detection of an equilibrium state when cooking porridge, and the equilibrium state is to be determined. It is an object of the present invention to provide a heating cooker capable of cooking porridge so as not to cause burning even when it is not detected.

[0007]

According to a first aspect of the present invention, there is provided a heat source for heating a cooking vessel, a temperature sensor for detecting a temperature of the cooking vessel, a timer for measuring a heating time, a temperature detected by the temperature sensor, and a timer. And a control circuit for adjusting the heating amount of the heat source based on the heating time measured by
A control circuit for detecting the equilibrium state of the temperature detected by the temperature sensor when cooking the rice porridge, and for reducing the heating amount after detecting the equilibrium state by the equilibrium detection means and for the cooking period timed by the timer. A cooking means for stopping heating at the end, and an equilibrium state detection when the equilibrium state detection means does not detect an equilibrium state from the start of heating of the cooking container to a time after the upper limit time limited by the timer. An upper limit defining means to be a point in time, wherein the cooking means comprises an equilibrium detecting means and an upper limit defining means.
Heats a certain time after the equilibrium state is detected
Reduce the amount and the cooking period is balanced by the balance detection means
State when the state is detected, and when the equilibrium state is detected by the upper limit regulating means.
Are specified respectively.

[0008] invention of claim 2 is the invention of claim 1, time is 6 minutes until reducing the heating amount from the detection time point of equilibrium state, cook up when the equilibrium state is detected by the balanced detection means The cooking period is set to 15 minutes when the period is 22 minutes and the equilibrium state is detected by the upper limit specifying means.

[0009] The invention of claim 3 is claim 1 or claim 1.
In the second invention, the heat source is a gas burner.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present embodiment, a gas stove is exemplified as a heating cooker, but the technical concept of the present invention is applicable to various heating cookers such as a heating wire, a halogen heater, and an induction heating cooker. is there. Alternatively, the technology of the present invention can be applied not only to a stove-type cooking device but also to a cooking device such as an oven or a rice cooker.
In addition, as a gas stove, a gas stove having a function of distinguishing between cooking with water, which is a food with a high moisture content such as boiled food and fired food, and cooking with oil, such as fried food, in which cooking oil is heated and cooked. Although provided, the control of the heat power of the porridge is different from that of general cooking of water, so that when the porridge is cooked, the user operates a switch button (not shown) to designate the porridge.

In this embodiment, as shown in FIG. 1, a temperature sensor 6 composed of a thermistor is disposed near the center of a gas burner 8 provided in the gas stove 1, and the temperature sensor 6 is provided with a built-in pressure spring (not shown). ) Is urged upward in the figure. The temperature sensor 6 is usually a gas burner 8
It is arranged so that the flame does not hit directly. Further, in a state where the cooking container 5 such as a pot or a frying pan is not placed on the virtues 4 arranged around the gas burner 8, the tip surface (upper surface in the figure) of the temperature sensor 6 is higher than the upper surface of the virtues 4. Protrude. Therefore, when the cooking container 5 is placed on Gotoku 4,
The pressure spring is compressed, and the temperature sensor 6 elastically contacts the bottom of the cooking vessel 5. Therefore, the temperature at the bottom of the cooking container 5 can be detected by the temperature sensor 6.

On the flow path of the fuel gas to the gas burner 8,
An instrument plug 2 for manually igniting and extinguishing the gas burner 8 and adjusting the flow rate of the fuel gas, and a function of automatically adjusting the flow rate to the gas burner 8 under the control of a control circuit 7 described later, and shutting off the fuel gas in the event of an abnormality. And a gas supply control device 3 having the same. The gas supply control device 3 includes a safety valve 3a that is an electromagnetic valve that is opened when the gas burner 8 is ignited.
And a flow control valve 3b composed of an electromagnetic valve for controlling the flow rate of the fuel gas supplied to the gas burner 8. A bypass passage 3c is provided in parallel with the flow control valve 3b, and the supply amount of the fuel gas to the gas burner 8 can be switched stepwise according to the opening and closing of the flow control valve 3b. In the present embodiment, an example in which the supply amount of the fuel gas is switched in two stages is shown. However, if it is necessary to switch in three or more stages, a plurality of flow control valves 3b may be provided and a plurality of flow paths may be provided in parallel. . By providing such a flow control valve 3b, the heating power of the gas burner 8 can be switched by opening and closing the flow control valve 3b while the gas burner 8 is ignited. In the following, a state in which the thermal power is large is referred to as medium fire, and a state in which the thermal power is small is referred to as small fire. (In the present embodiment, since the thermal power of the gas burner 8 is switched between two stages, it should be called large fire and small fire. But the purpose is to cook porridge,
It is called a medium fire because the relative heating power to the maximum output calorific value of the gas burner 8 is moderate.

The safety valve 3a and the flow control valve 3b are controlled by a control circuit 7. The safety valve 3a is opened together with the operation of the instrument plug 2 when the gas burner 8 is ignited, and is closed when the combustion of the gas burner 8 is stopped.
In the present embodiment, the porridge is closed when the porridge is cooked. The heating time by the gas burner 8 after the safety valve 3a is opened is measured by the timer 9. The control circuit 7 mainly has a microcomputer, and controls the safety valve 3a and the flow control valve 3b based on the temperature detected by the temperature sensor 6 and the heating time measured by the timer 9.

However, in order to automatically control the heat when cooking the porridge, it is necessary to determine whether or not the food in the cooking container 5 has reached a boiling state. The circuit 7 is provided with a balance detecting means 11.
In addition, since it is necessary to reduce the heat and cook after reaching the boiling state, a cooking means 12 for performing a cooking process is provided. Specifically, as shown in FIG. 3A, a certain period of time (for example, 10
In the initial heating period T1 (minute), heating is performed with a small flame, and when the initial heating period T1 ends and the equilibrium detection period T2 is reached, switching is made to medium heat. When the food is substantially boiled during the equilibrium detection period T2, the equilibrium state where the time change of the temperature detected by the temperature sensor 6 is small. The equilibrium detecting means 11 detects such an equilibrium state. For example, the equilibrium detecting means 11 samples the detected temperature at regular time intervals, and the dispersion of the specified number (for example, 5) of sampled values can be less than the threshold value. In this case, it is determined that an equilibrium state has been reached.

When the equilibrium state is detected at time ta in this manner, the medium is heated on medium heat for a fixed time (for example, 6 minutes), and the equilibrium detection period T2 ends. Thereafter, a fixed time (for example, 22 minutes) from the end of the equilibrium detection period T2.
During the heating period T3, the heating is continued with the heat of the gas burner 8 as a small fire, and when the cooking period T3 ends, the safety valve 3a is closed to extinguish the gas burner 8.
In the present embodiment, the heating means 12 manages the thermal power of the gas burner 8 after the equilibrium state is detected, and the heating means 12 first terminates the equilibrium detection period T2 after a certain time from the detection of the equilibrium state. Then, the heat power is reduced to low heat. Thereafter, when the cooking period T3 ends, the gas burner 8 is extinguished.

The feature of the present embodiment is that even when the equilibrium detecting means 11 does not detect an equilibrium state, the heating means 13 can switch the heating power to small fire and can automatically extinguish the gas burner 8. Is a point. In order to enable this processing, when the equilibrium state is not detected within a certain period of time after the start of heating by the gas burner 8 (at the time of ignition), the upper limit time Tx is regarded as the equilibrium state detection time. An upper limit specifying means 13 is provided. That is, the time from the ignition of the gas burner 8 is measured by the timer 9, and the upper limit time Tx is limited by the timer 9. Since the upper limit time Tx is set in this way, even when the equilibrium state is not detected by the equilibrium detection means 11, the time point at which the upper limit time Tx has elapsed can be treated as the equilibrium state detection time point, and the subsequent processing is performed for the equilibrium state detection. This can be performed in the same manner as when the equilibrium state is detected by the means 11.

However, the upper limit time Tx must be set longer than the time during which the equilibrium state is detected in the normal state. The amount of heating may be excessive and the porridge may become too soft. Therefore, the balance detecting means 11
The cooking time T3 when the equilibrium state is detected by the upper limit defining means 13 is set shorter than the cooking time T3 when the equilibrium state is detected by the above. Specifically, the former is 22 minutes, and the latter is 15 minutes.

As described above, in normal operation, FIG.
As shown in (b), the equilibrium state is detected at time ta before the upper limit time Tx elapses, and the equilibrium state detection time ta
After 6 minutes from the start, the equilibrium detection period T2 ends and the process moves to the cooking period T3. Since the cooking period T3 is 22 minutes, the gas burner 8 extinguishes 28 minutes after the detection point ta of the equilibrium state. On the other hand, when the equilibrium state is not detected before the upper limit time Tx, as shown in FIG. 3A, the process shifts to the cooking period T3 six minutes after the lapse of the upper limit time Tx tb, and the cooking period T3 at this time. Is 15 minutes, the gas burner 8 extinguishes 21 minutes after the time point tb at which the upper limit time Tx has elapsed.

Here, if the upper limit time Tx is not set, the equilibrium detection period T2 cannot be ended as shown in FIG. 4, so that the thermal power of the gas burner 8 is maintained at medium heat. When the water content evaporates, the detected temperature rises rapidly and the food becomes scorched. 3 and 4, (broken line) indicates the temperature of the food in the cooking vessel 5, and (solid line) indicates the temperature detected by the temperature sensor 6.

FIG. 2 summarizes the operation described above. That is, when the state in which the rice porridge is cooked is selected (selected by the operation unit) and the gas burner 8 is ignited (S1), the gas burner 8 is set to low heat and heated (S2). Initial heating period T for a certain time
When 1 elapses (S3), the mode is switched to medium heat (S4),
The food in the cooking vessel 5 is boiled. Here, before the upper limit time Tx elapses from the ignition of the gas burner 8 (S
5) When the food boils and an equilibrium state is detected (S
6), the cooking period T3 is set to 22 minutes (S7), and after 6 minutes from the detection of the equilibrium state, the equilibrium detection period T2 is ended (S8), and the fire power is reduced by switching to low heat (S8).
9). Thereafter, when the cooking period T3 (22 minutes) has elapsed (S10), the gas burner 8 is extinguished (S11). On the other hand, when the equilibrium state is not detected before the upper limit time Tx elapses (S5), the cooking period T3 is set to 15 minutes (S12), and the equilibrium detection period T2 six minutes after the upper limit time Tx elapses. Is terminated (S8), and the fire power is switched to low heat to reduce the heating power (S9). Thereafter, when the cooking period T3 (15 minutes) has elapsed (S10), the gas burner 8 is extinguished (S11). Even when the equilibrium state is not detected by the above procedure, the porridge is not burnt.

[0021]

According to the first aspect of the present invention, the heat source for heating the cooking container, the temperature sensor for detecting the temperature of the cooking container, a timer for measuring the heating time, the temperature detected by the temperature sensor and the timer are used. A control circuit for adjusting a heating amount of the heat source based on the heating time, wherein the control circuit detects an equilibrium state of a temperature detected by a temperature sensor when cooking the porridge; and an equilibrium state by the equilibrium detection means. A heating means for reducing the amount of heating after the detection and stopping the heating at the end of the cooking time period timed by the timer, and an equilibrium detecting means from the start of heating of the cooking vessel to an upper limit time period timed by the timer. When the equilibrium state is not detected, the upper limit defining means is set to the time point at which the upper limit time has elapsed when the equilibrium state is detected. Even when the equilibrium state is not detected, it is considered that the equilibrium state has been detected when the upper limit time elapses after the heating by the heat source is started, and the time point at which the upper limit time elapses is set as the equilibrium state detection time, and the heating by the cooking means is performed. Since the amount is adjusted, it is possible to prevent the cooked food from being scorched due to heating without detecting the equilibrium state.

[0022] Moreover, the invention of claim 1 is to reduce the amount of heating after a predetermined time from the detection time point of equilibrium by either the equilibrium detecting means and the upper limit defining means 炊-out up means, the period up cooked is balanced detection and upon detection of equilibrium by means, which are defined respectively between the detection of the equilibrium state by the upper limit defining means, setting better long upper time than if the equilibrium condition is detected from the start of heating to a positive constant Therefore, by setting the cooking period in accordance with each, it is possible to prevent the amount of heating of the cooked food from becoming excessive and the porridge becoming too soft.

According to a second aspect of the present invention, in the first aspect of the present invention, a period from the time when the equilibrium state is detected to the time when the amount of heating is reduced is 6 minutes, and the cooking period when the equilibrium detection means detects the equilibrium state. Is set to 22 minutes, and the cooking period when the equilibrium state is detected by the upper limit specifying means is set to 15 minutes. With the current heating cooker, it is possible to cook rice porridge with this setting. .

The invention according to claim 3 is the invention according to claim 1 or claim
In 2 of the invention is obtained by the heat source gas burner, but in the case of gas burners is sometimes the equilibrium fluctuations of the flame due to the wind is not detected, according to claim 1 or請
By applying the technique of claim 2 , it is possible to avoid inconvenience such as burning when no equilibrium state is detected.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment of the present invention.

FIG. 2 is an operation explanatory diagram showing a processing procedure of the above.

3A is an operation explanatory diagram when an equilibrium state is not detected by an upper limit time, and FIG. 3B is an operation explanatory diagram when an equilibrium state is detected by an upper limit time.

FIG. 4 is an operation explanatory diagram showing a comparative example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Gas stove 2 Instrument plug 3 Gas supply control means 3a Safety valve 3b Flow control valve 3c Bypass path 4 Gotoku 5 Cooking vessel 6 Temperature sensor 7 Control circuit 8 Gas burner 9 Timer 11 Balance detection means 12 Cooking means 13 Upper limit defining means

────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Satoru Agane 1-15-152, Oka, Minami-shi, Minato-ku, Osaka-shi Inside Herman Co., Ltd. (72) Kenji Marusasa 1-1-52, Oka, Minami-shi, Minato-ku, Osaka-shi In company Harman (56) References JP 6-32017 (JP, Y2) (58) Fields investigated (Int. Cl. ⁷ , DB name) F24C 3/12 F24C 7/04 301 A47J 27/00

Claims (3)

(57) [Claims] 1. A heat source for heating a cooking vessel, a temperature sensor for detecting a temperature of the cooking vessel, a timer for measuring a heating time, and a heat source based on a temperature detected by the temperature sensor and a heating time measured by the timer. A control circuit for adjusting a heating amount of the porridge, wherein the control circuit detects an equilibrium state of the temperature detected by the temperature sensor when cooking the porridge, and reduces the heating amount after the equilibrium detection means detects the equilibrium state. And when the equilibrium state is not detected by the cooking means for stopping heating at the end of the cooking time period timed by the timer and by the equilibrium detection means from the start of heating of the cooking vessel to the upper limit time timed by the timer. And upper limit defining means for setting the time point at which the upper limit time has elapsed as a time point at which the equilibrium state is detected.
When the equilibrium state is detected by one of the
After a certain period of time, the amount of heating is reduced, and the cooking period is balanced
When the equilibrium state is detected by the detection
A heating cooker characterized in that it is defined respectively when a balanced state is detected . 2. The amount of heating is reduced from the time of detection of an equilibrium state.
Time until the equilibrium is detected by the equilibrium detection means.
When cooked, the cooking period is 22 minutes.
When the equilibrium state is detected, the cooking period is 15 minutes
Heating cooker of claim 1, wherein it is set to. 3. The heat source is a gas burner.
That claim 1 or heating apparatus according to claim 2, wherein.