JPH0810057B2 - Cooking temperature controller - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to cooking in which a cooked food is heated by a heating means such as a burner for a stove, the temperature of the cooked food is detected by a temperature sensor, and heating is completed at a temperature suitable for the cooked food. Temperature controller.

[0002]

2. Description of the Related Art In the conventional temperature control device for cooking of this kind,
For example, as shown in Japanese Examined Patent Publication No. 63-67106, the temperature rise of the cooked food is detected, and the proportional control valve is driven according to the inclination of the temperature rise to perform the proportional control of the combustion amount. There is a problem that the cost is relatively increased when the proportional control valve is used.

[0003]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention According to the present invention, it is possible to automatically determine whether or not the food to be cooked is a cooked food with a relatively inexpensive structure and a simple cooking start operation, and heat the food at a temperature suitable for the cooked food. It is intended to end.

[0004]

According to the present invention, there is provided heating means for heating an object to be cooked, a temperature sensor for contacting the bottom of a pan or the like for containing the object to detect its temperature, and detection by 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 determined in advance from the information of the temperature sensor, and the temperature gradient after the detection is preset. If it exceeds the specified value, the cooked item is judged to be cooked, and after this judgment, the temperature rise gradient above the preset specified temperature is detected, and the temperature at which this gradient is the lowest is constantly updated to the lowest case. The temperature of the temperature is detected as a reference temperature, the critical inclination detection circuit is compared with the temperature of the temperature sensor and the end temperature of the cooked food which is higher by a predetermined temperature than the reference temperature detected by the critical inclination detection circuit. Those formed by composed of an output control circuit for stopping.

[0005]

[Function] When the temperature detected by the temperature sensor reaches a predetermined temperature range after the start of cooking, the temperature gradient is detected by the critical gradient detection circuit, and if it is determined that the food to be cooked is a cooked food, the temperature rise gradient thereafter is used as a reference. When the temperature is detected and the temperature of the temperature sensor reaches the end temperature in the output control circuit, the heating means is stopped so that the cooked food can be ended without burning.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment according to the present invention will be described first with reference to FIG. A grill burner (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) mounted in the grill (3). Ignition button (4) (4) (4), which blinks
And the operation panel (5) is arranged.

As shown in FIG. 2, (6) and (6) indicate the temperature of the thermistor or the like mounted in the vent holes (7) and (7) formed in the center of the burner for stove (2) and (2). Gotoku (8) detachably attached around the burner (2) (2) for the stove with the sensor.
(8) When the pot (9), grill, etc. is placed on the top, it contacts the bottom of these and detects the temperature as an analog value. It is always urged upward by a spring (not shown). There is.

On the other hand, in FIG. 2, reference numeral (10) is a control circuit, which is an A / D conversion circuit (11) for converting the analog value of the temperature sensor (6) (6) into a digital value and the ignition button (4) ( 4)
An input detection circuit (12) for detecting the blinking operation of (4) and the burner for the stove based on the temperatures of the temperature sensors (6) and (6).
(2) A critical inclination detection circuit (13) that detects the reference temperature that serves as the reference for the end temperature of cooked food that stops combustion in (2), and the end temperature of cooked food is calculated from the reference temperature detected by this critical inclination detection circuit. And output control for controlling the solenoid valve (14) for controlling the fuel supply to the burner (2) (2) for the stove by comparing the end temperature of the cooked food with the temperature of the temperature sensor (6) (6) Circuit (1
It is mainly composed of 5) and.

The critical inclination detecting circuit (13) includes an inclination detecting section (16) for detecting the temperature inclination from the temperature sensors (6) (6).
And, an automatic determination unit (17) that automatically determines the cooking content by comparing and calculating the temperature gradient from this inclination detection unit, and if it is determined to be "boiled food" by the determination of this automatic determination unit, it is preset after the determination. It is composed of a critical gradient detecting section (18) that detects a temperature rise gradient above a predetermined temperature, constantly updates the temperature when this gradient is the lowest, and detects the temperature when it is the lowest as the reference temperature.

Further, the output control circuit (15) calculates an end temperature of cooked food which is higher than the reference temperature by a predetermined temperature (for example, 20 ° C.) on the basis of the reference temperature detected by the critical inclination detection section (18). It is composed of a calculation unit (19) and an electromagnetic valve control unit (20) for driving the electromagnetic valve (14) by comparing the end temperature of the cooked food with the temperature of the temperature sensor.

When cooking "boiled food", the pan (9) containing the food to be cooked is placed and placed above the burners (2) (2) for the stove, as shown in FIG. Heating is started by operating the ignition button (4) of the burner for the stove to ignite the burner.

When the input detection circuit (12) detects the ignition operation by the ignition button (4), the temperature sensor (6) causes a predetermined temperature range shown in FIG. Temperature gradient t from TA to TB (for example, 80 to 90 ° C.)
(Time required for temperature rise) is detected, and whether or not the temperature gradient after detection of the temperature gradient (for example, the time required to rise by 0.5 ° C.) is a predetermined value (eg, t / 2) or more is compared. The item to be cooked is determined to be "boiled".

Next, after the above-mentioned "boiled food" is determined, the water content in the pan (9) is reduced by absorption, evaporation, etc. of the food to be cooked,
The temperature gradient of the temperature sensor (6) becomes relatively flat, where the temperature of the temperature sensor (6) is a predetermined temperature (for example, 100
C.), the temperature of the subsequent temperature rise gradient is stored in the critical slope detection unit (18) while being constantly updated, and the lowest temperature is stored as the reference temperature T.

When the reference temperature T is set, the end temperature calculation unit (19) sets the end temperature TE (eg T
+20) is calculated and the temperature sensor is used in the solenoid valve controller (20).
When the temperature of (6) reaches the cooking end temperature TE, tilt detection is performed for a certain time (for example, 10 seconds), and then the solenoid valve
(14) is closed to stop the combustion of the stove burner (2) (2).

If a temperature drop occurs for some reason within the above-mentioned fixed time, the end temperature calculation section (19) suspends the closing of the solenoid valve (14), and after the rising gradient again occurs. It is configured to detect again whether the cooking end temperature TE has been reached, and repeat the same inclination monitoring again within the above-mentioned fixed time, whereby, for example, the food to be cooked in the pan (9) is Even if you stir it, lift the pot (9) temporarily, etc. without extinguishing the stove burners (2) (2) on the way,
The burner can be surely extinguished only after cooking.

When the cooking is to be stopped before the end temperature of the cooked food is reached, the ignition buttons (4) and (4) are operated to extinguish the burners (2) and (2) for the stove.

Further, when the temperature detected by the temperature sensors (6) and (6) at the start of cooking by operating the ignition buttons (4) and (4) is higher than the predetermined temperature range TA to TB, this temperature is set. The temperature gradient t (time required for temperature rise of 3 ° C.) in a predetermined temperature range (eg 81 to 93 ° C.) which is higher than the temperature range is detected, and the temperature gradient after the temperature gradient detection (eg 0.5 ° C.). The rising time is a predetermined value (eg t / 2)
Compare the above, and if it is more than "cooked food"
To determine.

In addition to the above, the temperature at the start of cooking is, for example, 9
In the case of 4 to 97 ° C, the time required for 1.5 ° C rise is t
A good result was obtained with / 2.

[0019]

According to the structure of the present invention, the temperature of the cooked food is indirectly detected from the bottom of the pan, and the temperature rise is automatically judged by the control circuit. By automatically extinguishing the fire at a certain temperature and a high non-sticking temperature, the user can cook the simmered food without failing, by simply putting on a pan containing the material to be cooked and performing an ignition operation.

[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 during cooking of boiled food.

[Explanation of symbols]

 2 Burner for stove 6 Temperature sensor 9 Pan 10 Control circuit 13 Critical inclination detection circuit 15 Output control circuit

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshifumi Ozaki 3-201 Minamiyoshikata, Tottori City, Tottori Prefecture, Tottori Sanyo Electric Co., Ltd. (56) Reference JP-A-3-236518 (JP, A)

Claims (4)

[Claims] 1. A heating means for heating an object to be cooked, a temperature sensor for contacting with a bottom surface of a pan or the like for accommodating the object to be cooked 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 a temperature gradient in a predetermined temperature range predetermined from the information of the temperature sensor, and the temperature gradient after the detection has a predetermined value set in advance. When it exceeds, the cooked item is determined to be a simmered product, and after this determination, a temperature rising gradient of a preset temperature or higher is detected, and the temperature at which this gradient is lowest is constantly updated to determine the temperature at the lowest point. A critical inclination detection circuit that detects as a reference temperature is compared with the temperature of the temperature sensor and a cooking end temperature that is a predetermined temperature higher than the reference temperature detected by the critical inclination detection circuit, and this end temperature is reached. And an output control circuit for stopping the heating means. 2. When the temperature of the temperature sensor at the start of cooking is higher than the predetermined temperature range, the critical inclination detection circuit is set to a predetermined predetermined temperature range higher than the predetermined temperature range. The configuration is such that a temperature gradient in a specific temperature range narrower than the predetermined temperature range is detected, and if the temperature gradient after the detection exceeds the predetermined value set in advance, the cooked object is determined to be a cooked food. The temperature control device for cooking according to claim 1, wherein the temperature control device is for cooking. 3. The cooking temperature control device according to claim 2, wherein a plurality of the specific temperature ranges are set in the critical inclination detection circuit in accordance with the temperature at the start of cooking. 4. The output control circuit sets a predetermined time after the temperature of the temperature sensor reaches the end temperature of the cooked food, and when a temperature drop is detected within this time, the stop of the heating means is suspended and the output control circuit is restarted. The method according to claim 1, characterized in that it is configured to detect again whether the end temperature of the boiled food has been reached after the rising gradient has been reached, and to repeat the same inclination monitoring again within the fixed time. Temperature control device for cooking.