JPH0581803B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a cooking temperature control device, and more particularly, the present invention relates to a cooking temperature control device, and more specifically, it controls cooking temperature by detecting the temperature of a cooking pot, that is, a container containing food. The present invention relates to a cooking temperature control device that indirectly detects the temperature of an object and reduces at least the amount of heating when the temperature of the object is deemed to have reached boiling temperature.

(Prior Art) As disclosed in Japanese Patent Publication No. 63-67104, the above-mentioned type of cooking temperature control device slows down the increase in the detected temperature of the cooking pot. A cooking temperature control system that considers the point at which the temperature rise slope becomes less than a predetermined value or reaches equilibrium as the boiling of the food to be cooked, and reduces at least the amount of heating for cooking when this point is detected. The device is known.

(Problem to be solved by the invention) However, in the above-mentioned conventional device,
The detected temperature of the cooking pot near the boiling point of the food being cooked is in an almost equilibrium state and therefore unstable, and therefore the value of the temperature rise slope also tends to be unstable, making it difficult to accurately detect the boiling point. As a result, there is a problem that the temperature control may malfunction, for example, the amount of heating may decrease, or the heating may be stopped too early or too late. This problem is particularly noticeable when the flame is fanned by the wind to the bottom of the pot, especially when the cooking pot is old and the bottom of the pot is uneven.

Therefore, the present invention solves the above-mentioned problems of the conventional device, accurately grasps the boiling point of the food to be cooked, and thereby enables accurate control of the cooking temperature, especially when the food is boiling. The purpose of this invention is to provide a control device.

(Means for Solving the Problems) As a result of intensive research by the inventors of the present invention, the time required to raise the temperature in a predetermined temperature range from a predetermined low temperature to a high temperature is It was found that the temperature is proportional to the time required for boiling. The present invention is based on this knowledge, and the cooking temperature control device according to the present invention includes a heating means for heating a container containing food to be cooked, and a temperature detection device for detecting the temperature of the container being heated by the heating means. means, receives an output signal from the temperature detection means, measures the time required to raise the temperature within a predetermined temperature range below the temperature of the container at boiling time based on the output signal, and based on this measurement time; a boiling time calculation unit that calculates the boiling time of the food and outputs a heating amount adjustment signal when the boiling time reaches the boiling time, and receives the heating amount adjustment signal from the boiling time calculation unit and outputs this signal. The present invention is characterized by comprising a heating control means for reducing at least the heating amount of the heating means based on the following.

(Function) In the present invention, the predetermined temperature range for calculating boiling time is lower than the temperature of the container during boiling (equilibrium range) and is a range in which the temperature continues to rise, so it is stable. There is. Therefore, the time Δt required to raise the temperature in the above range is the same when the flame is fanned to the bottom of the container by the wind, especially when the cooking container is old and the bottom of the container is uneven. It is not easily affected by these and is stable. Therefore, the boiling time T is the above stable time Δt
Since the value is calculated based on , the heating amount of the heating means can be accurately reduced at least at the boiling point without causing any erroneous determination of the boiling point, that is,
Since heating is reduced or stopped, the amount of heating during boiling is not adjusted too early or too late.

(Example) Hereinafter, a cooking temperature control device according to a preferred example of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a schematic diagram showing a cooking temperature control device according to an embodiment of the present invention incorporated into a gas stove.

In this figure, reference numeral 1 indicates a gas table stove, and this gas table stove 1 is equipped with a burner 2 as a heating means. This burner 2 has
A gas supply path 3 for supplying fuel gas to the burner is connected. The burner 2 burns fuel gas supplied from the gas supply path 3, thereby heating the bottom of the cooking pot 4 and applying heat to the food contained therein. In order to control the cooking temperature, that is, the amount of heating by this burner 2, a cooking temperature control device 10 is provided.

This cooking temperature control device 10 is provided in the gas supply path 3 and includes a control valve 11 serving as a heating control means for adjusting the size of the gas passage area of the gas supply path. As this control valve 11,
A solenoid valve or a proportional valve can be used. Further, this control valve 11 is connected to a cooking temperature control circuit 12, and this cooking temperature control circuit 12 includes:
A pot bottom temperature sensor 13 serving as temperature detection means is connected. This pot bottom temperature sensor 13 is provided on the burner 2 so as to face the bottom of the cooking pot 4, and detects the temperature of the bottom of the cooking pot 4 during cooking, and outputs a temperature signal SI.

The cooking temperature control circuit 12 is entirely composed of a microcomputer, etc., and includes a predetermined temperature range temperature rise time measurement section 14, a boiling time calculation 15, and a control valve adjustment signal generation section 16. The predetermined temperature range heating time measuring section 14 continuously receives the temperature signal SI from the pot bottom temperature sensor 13, and determines the predetermined temperature range from the temperature signal SI, for example, as shown in FIG. The temperature at the bottom of the container
The time Δt required to raise the temperature from 85° C. to 96° C. is measured, and a time signal S2 indicating this time Δt is output. To measure the time Δt, for example, a timer is started when the temperature indicated by the temperature signal S1 reaches 85°C, and then when the temperature reaches 96°C,
It is measured by measuring the time indicated by the timer at that time.

The boiling time calculation unit 15 receives the time signal S2 from the predetermined temperature range temperature rise time measurement unit 14,
Based on the time Δt indicated by this time signal S2, the time T required to raise the temperature from the high temperature side of the above predetermined temperature range, that is, 96°C to the boiling temperature, is predicted from a predetermined proportional equation. calculate. The above predetermined proportional equation is as follows when the predetermined temperature range is from 85° C. to 96° C. as described above.

That is, When △t>60 seconds T=2△t When 60≧△t＞40 seconds T=2△t−15 When 40≧△t＞15 seconds T=2△t−30 When △t≦15 seconds, T=1 It is.

For example, when time △t is 70 seconds, time T
is 140 seconds according to the above equation of T=2Δt.
The boiling time calculation unit 15 outputs the boiling time signal S3 when the calculated time T, which is 140 seconds in the above example, has elapsed since the time when the temperature of 96° C. was detected.

When the control valve adjustment signal generation section 16 receives this boiling time signal S3 from the boiling time calculation section 15,
Generates a signal to throttle the control valve 11 to a predetermined opening degree or close it, that is, a control valve adjustment signal S4, and throttles the control valve 11 to reduce the supply gas amount or close the control valve 11. then stop the gas supply. This reduces at least the amount of heating during boiling and prevents boiling over during boiling.

In the embodiment described above, the predetermined temperature range for calculating the boiling time is 85°C to 96°C.
However, this temperature range may be a lower temperature range than the above, for example, 70°C to 80°C. However, when this temperature range is set to a low value as mentioned above, for example, when heating hot water that is initially at 75°C, the temperature cannot be controlled. It is desirable to use a high temperature range such as 96°C.

In addition, in the case of the above example, the temperature was 85℃ from the beginning.
When heating from hot water above, the boiling time T is uniformly set to, for example, 120 seconds.

In the above embodiment, the time T is allowed to elapse from the time when the temperature on the high side of the predetermined temperature range (96°C) is detected, but the time T is not limited to this, and may be made to elapse from the time when 97°C is detected. In this case, the predetermined proportionality equation is somewhat different.

(Effect of the invention) In the cooking temperature control device according to the invention,
As mentioned above, the time required to raise the temperature within the predetermined temperature range is measured and the boiling time is predicted and calculated based on this, so the boiling time is predicted based on the amount of time required to raise the temperature to the bottom of the container due to wind. The boiling time can be set accurately without being affected by fanning or the like. Therefore, the amount of heating during boiling can be adjusted with high accuracy. Furthermore, in the cooking temperature control device of the present invention, when measuring the time required to raise the temperature within the predetermined temperature range,
Since the material, thickness and shape of the cooking container, the amount of food contained therein, etc. are automatically taken into consideration, these factors are also taken into account when setting the boiling time, and the boiling time can be set with high accuracy.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing a cooking temperature control device according to an embodiment of the present invention incorporated into a gas table stove, and FIG. 2 is a characteristic curve diagram showing cooking temperature. 1... Gas table stove, 2... Burner, 3
... Gas pipe, 4 ... Cooking container, 10 ... Cooking temperature control device, 11 ... Control valve, 12 ... Cooking temperature control circuit, 13 ... Pot bottom low temperature sensor, 14 ...
Predetermined temperature range heating time measuring section, 15... Boiling time calculation section, 16... Control valve adjustment signal generating section.

Claims (1)

[Claims] 1. A heating means for heating a container containing food to be cooked, a temperature detection means for detecting the temperature of the container heated by the heating means, receiving an output signal from the temperature detection means, and based on this output signal, Measure the time required to raise the temperature within a predetermined temperature range below the container temperature at boiling, calculate the boiling time of the food based on this measured time, and when the boiling time is reached, A boiling time calculation section that outputs a heating amount adjustment signal, and a heating control means that receives the heating amount adjustment signal from the boiling time calculation section and reduces at least the heating amount of the heating means based on this signal. A cooking temperature control device characterized by: