JP2634114B2 - Cooker - 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 having a function of automatically controlling a heating state.

[0002]

2. Description of the Related Art As a cooking device such as a gas stove, depending on a cooking method such as boiling, frying (including frying with oil) or baking, for example, combustion control of a heating means such as a burner (a small fire, There is a type in which the heating temperature of the cooked food can be automatically adjusted by performing a large fire switch. Further, a method of estimating the heating temperature of the food from the output of a temperature sensor that detects the temperature by contacting the bottom of a container such as a pot that is heated with the food is generally adopted.

[0003] In this type of heating cooker, for example, a mode for boiling food (hereinafter, this mode is referred to as a boiling mode).
When the temperature detected by the temperature sensor reaches the temperature determined to be burnt, the burner is automatically extinguished to prevent burning of the food. Also, if you set the mode to fry or fry the food (hereinafter, this mode is called oil mode), keep the oil temperature constant or when the oil temperature becomes abnormally high The fire can be extinguished automatically.

Further, if a cooking mode is set for baking, automatic extinguishing can be performed when the heating temperature rises abnormally.

[0005]

However, when the heating state is stopped in accordance with the temperature detected by the temperature sensor, such as the above-mentioned cooking device, depending on the material and thermal power of the container, etc.
There is a difference in the state of the cooked food at the time of stopping the heating, and it may be preferable to stop the heating state earlier than the set temperature set to stop the heating state.

[0006] The reason for this is that, for example, in the stewed food mode, when the heating is stopped at a constant temperature after being cooked over a large fire, and when the heating is stopped at a fixed temperature after being cooked over a small fire, the former case is clearly apparent. In the case of (1), the heating state of the food is larger, and in the case of preventing burning (or in the case of reducing the degree of burning), in the former case, the heating is stopped at a lower set temperature than in the latter case. Is preferred.

Therefore, in order to improve this point, conventionally, a method of reading the temperature rise tendency of the container from the temperature detected by the temperature sensor and, when the temperature rise tendency is sharp, adopting a method of lowering the heating stop temperature is adopted. Have been. However, according to this method, for example, depending on the type and material of the container, it may not be possible to appropriately prevent the sticking. For example, when cooking using a poorly conductive material such as an earthenware pot, if the temperature is set to stop heating only due to a rising temperature, heating may stop before the food is sufficiently heated. is there. In other words, in a container with poor heat conduction such as an earthenware pot, even if the surface temperature of the container detected by the temperature sensor rises sharply, there is a time delay before heat is transmitted to the food contained in the container. Because.
Therefore, the method of adjusting the heating stop temperature has a problem that it is not possible to perform cooking in which an object is cooked completely in the case of an earthen pot or the like.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and an object of the present invention is to provide a cooking method that can completely boil a food even in a container having poor heat conduction and can prevent burning. To provide equipment.

[0009]

According to the present invention, in order to achieve the above object, a heating means for heating a food and a temperature for detecting a temperature by contacting the bottom of a container to be heated with the food contained therein. Temperature detecting means such as a sensor, determining that the food is in a boiling state from the output of the temperature detecting means, determining means to determine the scorched state of the food from the temperature rising tendency of the temperature detecting means after boiling, Heating control means for controlling a heating state of the heating means in accordance with a result of the determination by the determination means, wherein when the determination means determines that the food is in a scorched state, the heating control means controls the heating state by the heating means. If the temperature detected by the temperature detecting means does not decrease thereafter, the state where the heating state is forcibly switched to the small state is maintained, and the temperature detecting means is switched to the small state. If issued the temperature is lowered,
The heating state is returned to the state before the forcible switching.

[0010]

According to the present invention, as described above, the burning state of the cooked food is determined from the temperature rise tendency of the temperature detecting means after boiling, and when it is determined that the cooked food is in the burned state, the heating control means controls the heating means. By forcibly switching the heating state to a small state, instead of lowering the fire extinguishing temperature, the heating state is reduced to prevent burning (or to reduce the degree of burning), and the temperature detection means. By detecting whether or not the detected temperature decreases, it is possible to identify whether or not the food is really in a scorched state. If it is not in a scorched state, return the heating state to the state before the forced switchover to completely boil the food even in a container with poor heat conduction. It is obtained by possible way.

[0011]

1 to 3 show an embodiment of the present invention. In the present embodiment, the following description will be given of a case where the heating cooker is a gas table stove. In this heating cooker, as shown in FIG. 1, gas is supplied to a burner 1 as a heating means via a main plug 3 and a gas supply control unit 4 as a heating control means, and the cooked food is burned by the burner 1. The cooked container 2 (hereinafter, a case of a pot) is heated and cooked. Although not shown in FIG. 1, an ignition knob for performing ignition, fire extinguishing and thermal power adjustment is provided so that the thermal power adjustment can be performed manually.

In the case of this heating cooker, the degree of heat can be automatically adjusted according to cooking such as boiling, frying (including frying with oil) or baking, and various modes such as the above-mentioned boiled mode, oil mode and grilled mode can be performed. The setting of the cooking mode is performed by the mode setting unit 8. The mode setting section 8 includes a mode changeover switch for switching a cooking mode, a setting section for setting a temperature setting, a heating time, and the like, and a setting value or a current value of which setting mode or which cooking mode is being operated. A display unit for displaying information is integrally provided.

The combustion control of the burner 1 according to the cooking mode set by the mode setting section 8 is performed by a signal processing section 6 constituted by a microcomputer as a judging means and a proportional control valve (or an electromagnetic valve). And the gas supply control unit 4 configured as described above. In addition, the signal processing unit 6 determines the heating state of the food that matches the cooking mode set by the mode setting unit 8 according to the heating temperature of the food. Here, it is difficult to directly detect the temperature of the food,
A temperature sensor 5 such as a thermistor as a temperature detecting means that comes into contact with the bottom of the pot 2 is used to adopt a method of estimating the temperature of the food. That is, the signal processing unit 6 samples the output of the temperature sensor 5 and determines the heating state of the food that matches the cooking mode set by the mode setting unit 8, and determines the heating state of the gas supply control unit according to the determination result. 4 and burner 1
The heating state of the food is controlled by automatically adjusting the combustion state of the food to a predetermined state or automatically extinguishing the fire in a specific situation.

The cooking mode of the heating cooker according to the present invention will be described below. First, in the boiled food mode, when the temperature detected by the temperature sensor 5 becomes a temperature determined to be scorched, the gas supply control unit 4 stops gas supply and automatically extinguishes the burner 1. Prevent scorching. At this time, the user is simultaneously notified of the burning by a notification means such as a buzzer. In the case of the boiled food mode, the user can set the time to boil. When the time is set in this manner, the fire is automatically extinguished after the set time elapses. However, even before the elapse of the set time, if the burning is detected, the fire is automatically extinguished.

Next, in the oil mode, the amount of combustion (thermal power) of the burner 1 is automatically adjusted to the upper limit temperature when frying or frying below the temperature at which the oil ignites. Note that the upper limit temperature can be set to a desired temperature according to cooking by the user. Also, when the temperature rises to a temperature determined to be abnormal for some reason, automatic fire extinguishing is performed. In the baking mode, the combustion amount (thermal power) of the burner 1 is automatically adjusted to the upper limit temperature. However, the upper limit temperature in the baking mode is adjusted to be higher than that in the oil mode. In this case, if the temperature abnormally rises above the upper limit temperature, automatic fire extinguishing is performed.

Further, this cooking device is provided with a water heating mode which is convenient for boiling water, detects the boiling state of the water from the output of the temperature sensor 5, notifies the buzzer or the like, and automatically extinguishes the fire. It has a function to perform. The boiling state of the hot water can be detected because the temperature of the water becomes substantially constant when the water boils, and the output of the temperature sensor 5 also becomes substantially constant.

Further, as a function commonly provided in all the above-mentioned cooking modes, a function is provided for automatically turning off the fire when a timer set to prevent extinguishing is activated at the same time as the ignition, and when a time set in the timer elapses. ing. Less than,
A method for preventing non-sticking in the boiling mode, which is a feature of the present embodiment, will be described. FIG. 2 is a flowchart showing the method for preventing non-sticking according to the present embodiment.

In this embodiment, first, the boiling state is detected. Here, the temperature at which the cooked food (water added to the cooked food or water contained in the cooked food) boils is constant (100 ° C.) at the standard atmospheric pressure. It becomes almost constant. Therefore, if it is detected that the temperature detected by the temperature sensor 5 becomes substantially constant, the boiling state of the food can be detected.

When the boiling is detected in this manner, thereafter, the temperature detected by the temperature sensor 5 at the time of boiling rises by a fixed temperature Tc from T ₀ (the detected temperatures are T ₀ + Tc, T ₀ +2).
Tc, indicated by T ₀ + 3Tc ... to rise) the time required (t ₁ ~t ₃ in FIG. 3) to the respective measurement. That is, the rate of temperature rise at each constant temperature is measured. Here, the time point at which the temperature detected by the temperature sensor 5 rises as described above is when the food has boiled down to some extent and the water content has decreased.

As described above, the case where the time required to increase the temperature by the constant temperature Tc is within the predetermined time tc is as follows.
When the number of times becomes N consecutive times, the heating power is forcibly set to small fire regardless of the set heating power in this case. Thereafter monitors until whether the temperature detected by the temperature sensor 5 is to keep the increase in fire extinguishing temperature T _2. Now, assuming that the temperature rise is maintained up to the fire extinguishing temperature T ₂ , in this case, the food is heated to the fire extinguishing temperature T _{2 in a} small fire state to extinguish the fire. In this way, when the food is really boiled down, by setting the heating power to a low heat, the same effect as in the case of judging the scorched state of the food from the degree of increase in the temperature detected by the temperature sensor 5 and extinguishing the fire early is provided. can get. In other words, the heating power is reduced by the amount of heat to extinguish the fire early.

Conversely, if the food has not begun to scorch, the water content is high, and if the heat is set to a low heat, a phenomenon occurs in which the temperature drops after the low heat. Therefore, if the lowered temperature is equal to or higher than the fixed temperature Td, in this case, the heating power is forcibly returned to the value before the small fire. With this configuration, when the scorched state of the food is determined from the degree of increase in the temperature detected by the temperature sensor 5 and the fire is extinguished earlier,
For example, when cooking in a pot 2 such as an earthen pot with poor heat conduction, the problem of extinguishing the fire before the food is completely boiled down can be solved.

[0022]

As described above, according to the present invention, the burning state of the cooked food is determined from the temperature rise tendency of the temperature detecting means after boiling, and when it is determined that the cooked food is in the burned state, the heating control means heats the food. Since the heating state by the means is forcibly switched to a small state, instead of lowering the fire extinguishing temperature, the heating state can be reduced to prevent burning (or to reduce the degree of burning) and to reduce the temperature. Since it is detected whether the temperature detected by the detecting means decreases, it is possible to identify whether the food is really in a scorched state, and further, the cooking in which the temperature detected by the temperature detecting means decreases. If the food is not in a true scorched state, return the heating state to the state before the forced switchover, so that the food can be completely boiled even in a container with poor heat conduction. It can be.

[Brief description of the drawings]

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

FIG. 2 is a flowchart showing a main operation of the embodiment.

FIG. 3 is an explanatory diagram of the above operation.

[Explanation of symbols]

 Reference Signs List 1 burner 2 pan 4 gas supply control unit 5 temperature sensor 6 signal processing unit

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Makiko Nagano 4-1-2, Hirano-cho, Chuo-ku, Osaka-shi Inside Osaka Gas Co., Ltd. (72) Inventor Yutaka Yoshida 1-1-52, Oka, Minami-shi, Minato-ku, Osaka-shi In Herman (72) Inventor Tomoko Tanaka 1-15-152, Oka, Minami-shi, Minato-ku, Osaka-shi In Herman (72) Inventor Eriko Aoki 1-152, Minami-shioka, Minato-ku, Osaka-shi In Herman (56) References JP-A-61-259025 (JP, A) JP-A-3-236518 (JP, A) JP-A-4-9523 (JP, A)

Claims (1)

(57) [Claims] 1. A heating means for heating a food, a temperature detecting means such as a temperature sensor for contacting the bottom of the container to be heated with the food and detecting a temperature, and cooking from an output of the temperature detecting means. Judgment means for judging that the food is in a boiling state, judging the state of scorching of the cooked food from the temperature rise tendency of the temperature detection means after boiling, and controlling the heating state of the heating means according to the judgment result of this judgment means Heating control means, and when the determination means determines that the food is in a scorched state, the heating control means forcibly switches the heating state of the heating means to a small state, and thereafter, the temperature detection means If the detected temperature does not decrease, the state where the heating state is forcibly switched to a small state is maintained, and if the temperature detected by the temperature detecting means decreases,
A heating cooker wherein the heating state is returned to a state before the forced switching.