JPH05121154A - Induction-heated cooking appliance - Google Patents

Abstract

PURPOSE:To boil a material with no irregularity by measuring the temperature of a pot during the boiling cooking for a long period while the material is stirred at the temperature lower than the preset electric power set by a power setting means, and applying high electric power for a preset period until it is judged that the water content boils. CONSTITUTION:When a material is heated at the electric power set by a power setting means 7, e.g. 300W, while the boiled material is stirred by a stirring means 9, the temperature of a pot 5 is measured by a temperature detecting means at a preset cycle, e.g. at each 10min. A control means 8 is controlled to apply the electric power of 1200W to the pot 5 until the temperature of the pot 5 reaches the preset temperature, e.g. 100 deg.C. The water content is boiled to generate convection, and the material is sufficiently stirred by the convection. If the temperature of the pot 5 does not reach 100 deg.C when the heating output is increased to 1200W by the stirring means 9, it is judged that the water content in the material has sufficiently boiled, and the power feed of 1200W is stopped.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an induction heating cooker used in general households.

[0002]

2. Description of the Related Art The structure of a conventional general induction heating cooker is shown in the block diagram of FIG. 3 and its operation is shown in the timing charts of FIGS. 4 (a) and 4 (b).

In FIG. 3, 21 is a commercial alternating current, and the induction heating device 22 is a high frequency power source 23 and a heating coil 2.
It is composed of four. The pan 25 is a load heated by the induction heating device 22, and the temperature of the pan 25 is measured by the temperature detecting means 26. Reference numeral 27 denotes a power setting means, which allows a user to arbitrarily select desired power from preset power levels of six levels from 150W to 1200W. Further, 28 is a control means, which is a power setting means 27.
The induction heating device 22 is controlled so that the electric power is set by.

In such an induction heating cooker, stable electric power control is possible rather than the ON / OFF control of a general electric heater, and the induction cooker can be extinguished by a spillage like gas. It is often used for long-time stew cooking with low power because it has the advantage of not requiring ventilation.

Graphs of electric power and load temperature when the stewed food is cooked are shown in FIGS. 4 (a) and 4 (b). At this time, when the water content of the stewed material evaporates at the point B shown in FIG.
When the temperature detected by exceeds a predetermined temperature θ2, it is determined that the burning has occurred, and the heating is stopped.

[0006]

However, in the configuration of the conventional induction heating cooker described above, a stable low power is applied during cooking, so that the material for cooking is settled at the bottom of the pan. It has a drawback that it is easily burnt, and that the material deposited on the bottom causes unevenness in how heat is applied, resulting in a marked decrease in cooking performance.

The present invention solves the above problems, and it is a first object of the present invention to provide an induction heating cooker having a good cooking performance in which the material is prevented from burning even when the ingredients are settled on the bottom of the pan during cooking. I am trying. The second purpose is to prevent the stewed material from being overcooked and collapsed.

[0008]

To achieve the above object, the first means for solving the problems of the present invention is an induction heating device having a high frequency power source and a heating coil, and a pan for a load heated by this induction heating device. Temperature detection means for measuring the temperature of
Power setting means for arbitrarily setting the heating output of the induction heating device, control means for controlling the heating output of the induction heating device by receiving the output of the power setting means, and setting by receiving the output of the power setting means When the generated heating output is less than or equal to the predetermined output W1, the heating output is increased to a predetermined output W2 larger than the predetermined output W1 until the temperature measured by the temperature detecting means reaches the predetermined temperature θ1 at every predetermined time T1. And a stirring means for outputting to the control means.

A second means for solving the problem is that, if the temperature of the pot measured by the temperature detecting means does not reach the predetermined temperature θ1 even after the increase of the heating output by the stirring means exceeds the predetermined time T2, the stirring is performed. The increase in output by means is prohibited.

[0010]

According to the present invention, by providing the stirring means by the above-mentioned first means, when the stewed food is cooked for a long time with the electric power lower than the predetermined electric power W1 set by the electric power setting means, the temperature detecting means is used. Water in the pan is added by adding a predetermined power W2 larger than the predetermined power W1 every predetermined time T1 until the measured temperature of the pan reaches a predetermined temperature θ1 and it can be determined that the water in the pan has boiled. Can be boiled for a short time to stir the stewed material.

In the second means, even if the predetermined time T2 elapses while the heating power is being increased by the stirring means,
When the temperature of the pan measured by the temperature detecting means does not reach the predetermined temperature θ1, it is determined that the cooking material in the pan has already been sufficiently cooked, and the increase of heating power by the stirring means is prohibited. Of.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 is a block diagram of an induction heating cooker, FIG. 2
(A), (b) is a timing chart showing the operation.

In the figure, 1 is a commercial AC power supply, and the induction heating device 2 is composed of a high frequency power supply 3 and a heating coil 4. The pan 5 is a load heated by the induction heating device 2, and the temperature of the pan 5 is measured by the temperature detecting means 6. Reference numeral 7 denotes a power setting means, which allows the user to select an arbitrary power from six preset power levels of 150 W to 1200 W for cooking. The control means 8 controls the high frequency power source 3 of the induction heating device 2 so that the power set by the power setting means 7 is obtained. Further, the control means 8 is provided with a stirring means 9 for controlling the electric power of the high frequency power supply 3 by the signal of the temperature detection means 6.

In the above structure, when the power set by the power setting means 7 is lower than the predetermined power W1 such as 300 W, the stirring means 9 measures by the temperature detecting means 6 every predetermined period T1 such as every 10 minutes. Hot pot 5
Until the temperature reaches a predetermined temperature θ1, for example 100 ° C,
The control means 8 is operated so that the maximum heating power of 1200 W is applied to the pan 5 of the load. Thereby, the water in the pan 5 is boiled to induce convection in the pan 5, and the convection can stir the stewed material.

Further, the heating output is set to 1 by the stirring means 9.
When increasing to 200W and giving it to the pan 5, a predetermined time T
When the temperature of the pan 5 detected by the temperature detecting means 6 has not reached the predetermined temperature θ1 even after the lapse of 2, for example, 10
When the temperature does not reach 0 ° C., it is determined that the water content of the material to be cooked in the pan 5 is already sufficiently boiling, and the application of power of 1200 W is stopped.

Note that FIG. 2A shows a change with time of the electric power applied to the pan 5 by the induction heating device 2, and FIG. 2B shows a temperature change of the pan 5 as a result. That is, the power amount is increased from 300 W to 1200 W until the temperature of the pot 5 measured by the temperature detection unit 6 reaches the predetermined temperature θ1 at every predetermined time T1 by the stirring unit 9, and in FIG. At time point A, when the temperature exceeds the predetermined time T2 and the temperature of the pot 5 measured by the temperature detecting means 6 does not reach the predetermined temperature θ1 (for example, when water or the like is added), the electric power is 1200 W.
To 300W. This is to judge that the stewed material in the pot 5 has already been sufficiently stewed, prohibit the increase of heating power by the stirring means 9, and prevent the stewed material from collapsing.

[0017]

As described above, the first effect of the present invention is that, by providing the stirring means, the temperature of the pot is cooked at a predetermined time T1 when the stewed food is cooked with a power less than the predetermined power W1. Since the electric power of W2 which is larger than W1 is supplied to the pan until the temperature reaches the predetermined temperature θ1, the water in the pan is boiled temporarily, and the ingredients for stew cooking that have sunk at the bottom of the pan are stirred. It is possible to obtain an induction heating cooker with good cooking performance in which the material is evenly heated.

The second effect of the present invention is that by the stirring means,
While stirring the stewed ingredients in the pan with large power,
The temperature of the pan detected by the temperature detecting means is the predetermined time T1.
If the temperature does not reach the predetermined temperature θ1 even after lapse of time, it is judged that the cooking ingredients in the pan have already been cooked and the application of a large amount of power is stopped so that the cooking ingredients will not collapse. Stew cooking is possible.

[Brief description of drawings]

FIG. 1 is a block diagram of an induction heating cooker according to an embodiment of the present invention.

2A and 2B are timing charts showing the operation of the induction heating cooker.

FIG. 3 is a block diagram of a conventional induction heating cooker.

4A and 4B are timing charts showing the operation of the induction heating cooker.

[Explanation of symbols]

 2 induction heating device 3 high frequency power supply 4 heating coil 5 pan 6 temperature detection means 7 power setting means 8 control means 9 stirring means

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yumiko Kiyama 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (2)

[Claims] 1. An induction heating device having a high frequency power source and a heating coil, temperature detecting means for measuring the temperature of a pan of a load heated by the induction heating device, and a heating output of the induction heating device is arbitrarily set. When the electric power setting means, the control means for receiving the output of the electric power setting means and controlling the heating output of the induction heating device, and the heating output set by receiving the output of the electric power setting means are less than or equal to the predetermined output W1. Predetermined time T
And a stirring means for outputting to the control means such that the heating output is increased to a predetermined output W2 larger than the predetermined output W1 until the temperature measured by the temperature detection means reaches a predetermined temperature θ1. Induction heating cooker. 2. If the increase in the heating output by the stirring means exceeds the predetermined time T2 and the temperature of the pot measured by the temperature detecting means does not reach the predetermined temperature θ1, the increase in output by the stirring means is prohibited. The induction heating cooker according to claim 1, wherein.