JPH071089B2 - Cooking device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a cooking device provided with a gas sensor.

(Prior Art) Some cookers, for example, microwave ovens, detect gas emitted from food with a gas sensor and automatically cook according to the output of the gas sensor.

An example of such automatic cooking is shown in FIG.

That is, the output voltage Vs of the gas sensor is monitored during reheating cooking for warming rice, miso soup, curry, etc. Specifically, the output voltage Vs of the gas sensor reached the peak point Vsmax from the start of cooking. After that, the above peak point Vsmax
And the constant α, the time T0 required until the output voltage Vs changes by the product α · Vsmax is measured and captured. The above constant α
Is a constant in the range of about 0.05 to 0.1, for example. And
The time T ₀ is multiplied by a constant β, and β · T ₀ is set as the subsequent heating time. That is, from the start of heating, Tk (= T ₀ +
When β · T ₀ ) time has passed, the cooking ends there.

Here, the constants α and β are for determining the optimum cooking end timing corresponding to the type and amount of food, and the specific values of each are conventionally determined by experiments and are always fixed values. It has been decided. For this reason, the reality is that it is not always possible to obtain the optimum cooking end timing. For example, when the same type of food is divided into small quantity, standard quantity, and large quantity and actually cooked, the result is that the quantity is slightly overheated, the standard quantity is good, and the quantity is slightly underheated. To be

(Problems to be Solved by the Invention) The present invention has been made in view of the above circumstances.
The aim is to provide a reliable cooker that can surely obtain the optimum cooking end timing corresponding to the type and amount of food, which enables consistently good cooking. To do.

[Configuration of Invention] (Means for Solving Problems) In a cooking device provided with a gas sensor for detecting gas emitted from food, the output Vs of the gas sensor from the start of heating and cooking
After reaching the peak point Vsmax, the time T0 required for the output Vs to change by the product α · Vsmax of the peak point Vsmax and the constant α is measured, and the product of this time T ₀ and the constant β is heated thereafter. A means for setting the time and a means for changing the constant β depending on the value of the time T ₀ are provided.

(Operation) β increases as the value of T ₀ increases.

(Embodiment) An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 is a heating chamber, and a shelf 2 for placing food is provided at the bottom of the heating chamber 1. A magnetron 3 which is a high frequency generator is provided on the upper side wall of the heating chamber 1.
The antenna 3a of the magnetron 3 is introduced into the heating chamber 1. The magnetron 3 is connected to the commercial AC power source 5 via the high voltage transformer 4 and the relay contact 13a.
Connected to. Further, an exhaust port 6 is formed on the upper side wall of the heating chamber 1, and a gas sensor 7 is arranged near the exhaust port 6.

On the other hand, 10 is a control unit for controlling the entire microwave oven, which includes a microcomputer and its peripheral circuits. Then, the operation unit 11, the display unit 12, the relay 13, and the gas sensor 7 are connected to the control unit 10.

Next, the operation of the above-mentioned structure will be described with reference to FIGS. 2, 3, and 4.

The food is placed on the shelf 2 in the heating chamber 1, and the door of the heating chamber 1 is opened. Then, when a cooking start operation is performed by the operation unit 11, the control unit 10 energizes the relay 13. When the relay 13 operates, the contact 13a is closed and the magnetron 3 oscillates. That is, high frequency radio waves are radiated into the heating chamber 1 to start dielectric heating cooking.

During this cooking, the gas generated from the food is discharged to the outside through the exhaust port 6. At this time, the exhaust gas is the gas sensor 7
Detected by.

The control unit 10 takes the output voltage Vs of the gas sensor 7, and after the output voltage Vs reaches the peak point Vsmax from the start of heating and cooking, the output voltage Vs changes by the product α · Vsmax of the peak point Vsmax and the constant α. Measure the time T0 required to do and capture this time T0. Here, the constant α is, for example, 0.05 to
It is a constant in the range of about 0.1 and is a numerical value determined by experiment as described in the section of the conventional configuration.

Further, the control unit 10 controls the value of T ₀ and the set values Ta and Tb (Ta <Tb).
And T ₀ is smaller than the set value Ta (the second
(Fig.), The constant β ₁ is selected, and the subsequent heating time β ₁ · T ₀ is set. If T ₀ is between the set values Ta and Tb (Fig. 3),
Select the constant β ₂ and set the subsequent heating time β ₂ · T ₀ . If T ₀ is larger than the set value Tb (Fig. 4), the constant β
₃ is selected and the subsequent heating time β ₃ · T ₀ is set. Note that β ₁ <β ₂ <β ₃ .

Therefore, set values Ta = 2 minutes, Tb = 5 minutes, β ₁ = 0.1,
Assuming β ₂ = 0.2 and β ₃ = 0.3, when T ₀ is 1 minute (full of miso soup), Tk = 60 seconds + 60 seconds × 0.1 = 66 seconds When T ₀ is 3 minutes (3 miso soup) Cup), Tk = 180 seconds + 180 seconds × 0.3 = 234 seconds When T ₀ is 6 minutes (6 cups of miso soup), Tk = 360 seconds + 360 seconds × 0.5 = 540 seconds. Note that Tk is the cooking end timing.

That is, T ₀ is determined according to the type and amount of food, and by selecting the constants β ₁ , β ₂ , and β ₃ according to the size of T ₀ , it corresponds to the type and amount of food. It is possible to reliably obtain the optimum cooking end timing Tk. Therefore, it is possible to always cook in good condition, and the reliability can be greatly improved.

Then, at the cooking end timing Tk, the control unit 10 deactivates the relay 13. That is, the oscillating operation of the magnetron 3 is stopped, and the cooking is completed.

The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention.

[Effect of the Invention] As described above, according to the present invention, after the output Vs of the gas sensor reaches the peak point Vsmax from the start of heating and cooking, only the product α · Vsmax of the peak point Vsmax and the constant α is output. Vs is measures the time T0 required for the changes, and means for setting the product of the time T ₀ and a constant β as a subsequent heating time, and means for changing the constant β in accordance with the value of the previous period time T ₀ Since it is provided, it is possible to reliably obtain the optimum cooking end timing corresponding to the type and amount of food, and thereby it is possible to provide a highly reliable cooker that always enables good cooking.

[Brief description of drawings]

FIG. 1 is a diagram showing the configuration of an embodiment of the present invention, FIG.
FIGS. 3 and 4 are views for explaining the operation of the same embodiment, and FIG. 5 is a view for explaining the operation of the conventional cooker. 1 ... Heating chamber, 3 ... Magnetron, 7 ... Gas sensor, 10 ... Control section.

Claims (1)

[Claims] 1. A cooking device provided with a gas sensor for detecting gas emitted from food, wherein the output Vs of the gas sensor has a peak point from the start of cooking.
After reaching Vsmax, the product of the peak point Vsmax and the constant α α
A means for measuring the time T0 required for the output Vs to change by Vsmax and setting the product of this time T0 and the constant β as the heating time thereafter, and changing the constant β according to the value of the time T0. A cooking device characterized by comprising: