JPH0560327A - Temperature controller for cooking - Google Patents

Abstract

PURPOSE:To prevent oil from catching fire by a method wherein in the case the temperature gradient fails to reach a specified value before the detected temperature reaches the preset specified temperature and the temperature rising time period after a given temperature is longer than the set time period, an upper limit temperature decision device judges that frying is under way and heating is stopped when the temperature of the temperature sensor reaches the upper limit temperature. CONSTITUTION:When an ignition operation is detected by a input detecting circuit 16, a temperature gradient detector 20 detects the temperature gradient within a specified temperature range through a temperature sensor 7 and compares the temperature gradient after detection of the temperature gradient with the specified value to judge whether the temperature gradient is higher or lower than the specified value. When it is lower than the specified value, the temperature gradient within a specified temperature range at the specified temperature or higher is detected further. When a specified time period or longer remains before the temperature reaches the set specified temperature, it is judged that a relatively large amount of oil is heated and frying is under way. When it is judged as frying, the upper limit temperature is changed to a temperature suitable for frying, and when the temperature reaches the changed temperature, a solenoid valve 18 is closed by a solenoid controller 23, so that a natural ignition prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention heats fried foods such as tempura and simmered foods with a heating means such as a burner for a stove, and detects the temperature of these foods with a temperature sensor, and is particularly suitable for fried foods. The present invention relates to a cooking temperature control device that controls heating means by temperature.

[0002]

2. Description of the Related Art For example, Japanese Patent Publication No. 2-28062 discloses a cooker such as a stove which detects the temperature of the bottom of a pot and increases or decreases the heating amount of the heating means according to the detected temperature. However, when the heating amount is increased or decreased by using the proportional control valve or the like as described above, the heating amount can be finely controlled, but there is a problem that the cost is increased.

[0003]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention According to the present invention, without using a comparatively expensive proportional control valve or the like, it is possible to heat at a temperature suitable for deep-fried food, while eliminating the need for operating switches and keys according to the contents of cooking. The purpose is to stop.

[0004]

The present invention relates to a heating means for heating an object to be cooked, a temperature sensor for contacting the bottom of a pan or the like containing the object to detect its temperature, and the detection of this temperature sensor. A control circuit for controlling the heating means based on the temperature, the control circuit detects a temperature gradient in a predetermined temperature range predetermined from the information of the temperature sensor, and the temperature gradient after the detection is preset. If it occurs that the temperature does not exceed the preset value before rising to the specified temperature, and the time for the preset temperature to rise after the specified temperature is longer than the preset fixed time or longer, it is determined that the food is fried. The upper limit temperature determining circuit for setting the upper limit temperature for stopping the heating means to a preset temperature, and the output control circuit for stopping the heating means when the temperature of the temperature sensor reaches the upper limit temperature. It is those made.

[0005]

After the cooking starts, until the temperature detected by the temperature sensor rises to the preset specific temperature, the temperature gradient so far does not exceed the preset value, and the temperature rise time after the specific temperature is preset. If the time exceeds the set fixed time, the upper limit temperature determination circuit determines the food to be cooked, and if the temperature of the temperature sensor reaches the upper limit temperature, the output control circuit stops the heating means. , It prevents the ignition of oil and food.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment according to the present invention will be described first with reference to FIG. 1. (1) is a gas table body, and a pair of ring-shaped burners for a stove (2) (2) which are heating means are provided on the left and right of the upper surface. A grill (3) is mounted below the burner for the stove, and is attached to the front of the burner (2) (2) for the stove and the grill burner (not shown) installed in the grill (3). Ignition button (4) (4) (4) for blinking operation of
And the operation panel (5), and the burner for the stove (2)
(2) and controllers (6), (6) and (6) for manually adjusting the combustion amount of the grill burner are arranged.

As shown in FIG. 2, (7) and (7) indicate the temperature of the thermistor or the like installed in the vent holes (8) and (8) formed in the center of the burner for stove (2) and (2). Gotoku (9) detachably attached around the burner (2) (2) for the stove with a sensor.
(9) When the frying pan, pot (10), etc. are placed on the bottom, they contact the bottom of these and detect the temperature as an analog value, and are constantly urged upward by a spring (not shown). There is.

Also, as shown in FIG. 2, the operation panel (5) has a two-digit digital display (11) and five bar-shaped L's.
A temperature indicator (13), which is formed by arranging the EDs (12) (12) ... In parallel, is arranged.

On the other hand, in FIG. 2, (14) is a control circuit, which is an A / D conversion circuit (15) for converting the analog value of the temperature sensor (7) (7) into a digital value, and the ignition button (4) ( Input detection circuit (16) for detecting blinking operation of 4) and the burner (2) (2) for the stove from the temperature of the temperature sensor (7) (7)
Temperature control circuit (17) for determining or changing the upper temperature limit for stopping the combustion of fuel, and output control for controlling the solenoid valve (18) for controlling the fuel supply to the burner (2) (2) for the stove Circuit (1
It is mainly composed of 9) and.

The upper limit temperature determination circuit (17) includes an inclination detector (20) for detecting the temperature inclination from the temperature sensors (7) and (7).
And an automatic determination unit (21) for comparing and calculating the temperature gradient from this inclination detection unit to automatically determine the contents of cooking, and an upper limit temperature for determining or changing the upper limit temperature according to the determination result of this automatic determination unit. It is mainly composed of a judging section (22).

The output control circuit (19) also has a solenoid valve control section (23) for driving the solenoid valve (18) according to the output of the upper limit temperature determination circuit (17), and the digital display (11). ), A temperature indicator (13), a display / buzzer controller (25) for driving a buzzer (24) and the like.

When cooking "fried food", as shown in FIG. 2, a pot (10) containing an object to be cooked, such as oil, is placed above the Gotoku (9) (9) and placed. Burner for stove placed (2)
By operating the ignition button (4) of (2) to ignite the burner, cooking can be started relatively easily.

When the input detection circuit (10) detects the ignition operation by the ignition button (4), the temperature sensor (7)
As a result, a temperature gradient t in a predetermined temperature range T0 to T1 (for example, 80 to 90 ° C.) shown in FIG.
(Time required for temperature rise) is detected, and whether or not the temperature gradient after detection of this temperature gradient (for example, time required to rise by 0.5 ° C.) is a predetermined value (for example, t / 2) or more, and if the above is satisfied, the above is determined. It is determined that the food to be cooked is a "boiled food", and if it is less than or equal to a predetermined value, a temperature range T of a predetermined temperature range (for example, 10 ° C) set in advance above a predetermined temperature (for example, 80 ° C).
0 to T1, T1 to T2, T2 ... Temperature gradient (time required for temperature rise) t1, t2 ... Is detected, and until this rises to a preset specific temperature (for example, 190 ° C),
If there is a certain time (for example, 25 seconds) or more even once,
It is determined that a relatively large amount of oil is heated, and the food to be cooked is determined to be "fried food".

On the other hand, the upper limit temperature determining section (22) sets the upper limit temperature to, for example, 200 ° C. at the same time when the cooking is started by the ignition operation.
The first upper limit temperature before and after is set, and then the upper limit temperature is set to a second upper limit temperature of, for example, about 260 ° C. which is suitable for “fried food” cooking such as frying and tempura according to the “fried food” determination of the food to be cooked. This is to change the setting, so that, for example, even if the ignition operation is performed with a small amount of oil in the frying pan etc.,
By setting the above upper limit temperature, spontaneous ignition or the like can be prevented.

The solenoid valve controller (23) is a temperature sensor.
(7) When the temperature of (7) reaches the above upper limit temperature, the solenoid valve (18) is closed to stop the combustion of the burner (2) (2) for the stove, and the temperature is changed as shown in FIG. As the temperature of the sensor (7) (7) rises, each LED (12) (1) of the temperature indicator (13)
2) ··· is turned on or blinked sequentially, and the temperature of the temperature sensor (7) (7) is 180 ° C, which is suitable for “fried food” cooking.
When it reaches the first time, the buzzer (24) is driven to prompt the user to input the material.

Further, if the temperature of the temperature sensor (7) approaches each of the above upper limit temperatures, the display / buzzer controller (25).
For example, sound a buzzer (24) to notify that the temperature of the food to be cooked is too high, and inform the user of the above controller.
Operate (6) to urge you to lower the heating amount, which causes burner for stove due to reaching the upper limit temperature during cooking (2)
The fire extinguishing of (2) can be prevented.

On the other hand, if the temperature of the temperature sensor (7) reaches the upper limit temperature without being judged as "fried food" by the automatic judgment unit (21), the solenoid valve control unit (23) controls the solenoid valve (18). ),
For example, even if tempura is cooked with a small amount of oil by mistake, ignition is prevented.

[0018]

According to the structure of the present invention, when the object to be cooked is automatically judged by the control circuit with a relatively simple structure and it is judged that the object to be cooked is heated with oil, or relatively large amount among them. If it is determined to be fried food that heats oil,
By stopping the heating means at the upper limit temperature suitable for each cooking, it is possible to reliably prevent the ignition of oil, the ignition of foods, etc. When it is turned on, a buzzer or the like will notify the user, and the usability will be greatly improved.

[Brief description of drawings]

FIG. 1 is a perspective view of a gas table using the present invention.

FIG. 2 is a block diagram of the present invention.

FIG. 3 is a temperature characteristic diagram according to the present invention.

FIG. 4 is an operation explanatory diagram of the main part of the present invention.

[Explanation of symbols]

 2 Burner for stove 10 Pan 14 Control circuit 17 Upper limit temperature determination circuit 19 Output control circuit 24 Buzzer

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Yoshifumi Ozaki 3-201 Minamiyoshikata, Tottori City, Tottori Prefecture Tottori Sanyo Electric Co., Ltd.

Claims (2)

[Claims] 1. A heating means for heating an object to be cooked, a temperature sensor for contacting a bottom surface of a pot or the like containing the object to detect its temperature, and the heating means based on the temperature detected by the temperature sensor. In the one provided with a control circuit for controlling, the control circuit detects the temperature gradient of a predetermined temperature range determined in advance from the information of the temperature sensor, and the temperature gradient after the detection is set to a preset specific temperature. If it occurs that the temperature does not exceed a preset value before rising, and the preset temperature rise time after the specific temperature is longer than a preset fixed time, it is determined that the food to be cooked is fried food, An upper limit temperature determining circuit for setting the upper limit temperature for stopping the heating means to a preset temperature, and an output control circuit for stopping the heating means when the temperature of the temperature sensor reaches the upper limit temperature, A temperature control device for cooking characterized by being configured from 2. The output control circuit is configured to notify by a buzzer or the like when the temperature of the temperature sensor reaches a preset fried food temperature suitable for fried food cooking. 1. The temperature control device for cooking according to 1.