JP2976639B2 - Induction heating cooker - Google Patents

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 ordinary households.

[0002]

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

In FIG. 3, reference numeral 21 denotes a commercial alternating current, and an induction heating device 22 includes a high-frequency power source 23 and a heating coil 2.
4. 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 detection unit 26. A power setting means 27 allows the user to arbitrarily select a desired power from six levels of power from 150 W to 1200 W set in advance. Reference numeral 28 denotes a control unit, and a power setting unit 27
The induction heating device 22 is controlled so that the electric power is set by the following.

In such an induction heating cooker, stable electric power control is possible instead of ON / OFF control as in a general electric heater, and it is also possible for the induction heating cooker to disappear by blowing over like gas. It has the advantage of no ventilation and ventilation, so it is often used for low power, long stewed dishes.

[0005] Graphs of the electric power and the load temperature when the stew is cooked are shown in FIGS. 4 (a) and 4 (b). At this time, at the point B shown in FIG.
When the temperature detected by the above exceeds the predetermined temperature θ2, it is determined that the burn has occurred, and the heating is stopped.

[0006]

However, in the configuration of the conventional induction heating cooker, since the stable low power is applied during the cooking of the stew, the ingredients of the stew settle on the bottom of the pan. There was a problem that the material was easily scorched, and the method of applying heat was uneven due to the material precipitated on the bottom, so that cooking performance was significantly reduced.

An object of the present invention is to solve the above-mentioned problems, and a first object of the present invention is to provide an induction heating cooker having good cooking performance in which ingredients during cooking are not scorched even if they settle on the bottom of the pan. And A second object is to prevent the stewed material from being boiled too much.

[0008]

In order to achieve the above object, a first object of the present invention is to provide an induction heating device having a high frequency power supply and a heating coil, and a load pot heated by the induction heating device. Temperature detection means for measuring the temperature of the
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 in response to the output of the power setting means, and setting in response to the output of the power setting means When the measured heating output is equal to or less than 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 a predetermined temperature θ1 at predetermined time intervals T1. And stirring means for outputting to the control means.

[0009] The second object of the present invention is to provide a method for producing a stirrer, wherein the temperature of the pot measured by the temperature detecting means does not reach the predetermined temperature θ1 even if the increase in the heating output by the stirring means exceeds a predetermined time T2. This is to prohibit an increase in output by means.

[0010]

According to the first aspect of the present invention, by providing the stirring means by the first means described above, when cooking stew for a long time with a power lower than the predetermined power W1 set by the power setting means, the temperature detecting means is used. Until the measured temperature of the pot reaches the predetermined temperature θ1 and it can be determined that the water in the pot has boiled, the predetermined power T2 is applied every predetermined time T1 to increase the water content in the pan. Can be boiled for a short time to stir the stewed ingredients.

In the second means, while the heating power is being increased by the stirring means, even if a predetermined time T2 has elapsed,
If the temperature of the pot measured by the temperature detecting means does not reach the predetermined temperature θ1, it is determined that the stewed material in the pot has already been sufficiently cooked, and the increase in heating power by the stirring means is prohibited. It is.

[0012]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram of an induction cooking device, and FIG.
(A) and (b) are timing charts showing the operation.

In FIG. 1, reference numeral 1 denotes a commercial AC power supply, and an induction heating device 2 comprises 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. Numeral 7 denotes a power setting means which allows the user to select any power from six preset power levels from 150 W to 1200 W to perform 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 includes a stirring means 9 for controlling the power of the high frequency power supply 3 in accordance with a signal from the temperature detecting means 6.

In the above configuration, when the power set by the power setting means 7 is lower than the predetermined power W1, for example, 300 W, the stirring means 9 measures the temperature by the temperature detecting means 6 at predetermined intervals T1, for example, 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 as to supply the maximum heating power of 1200 W to the load pan 5. Thereby, the water in the pot 5 is boiled to evoke convection in the pot 5, and the convection can stir the stewed ingredients.

The heating output is reduced to 1 by the stirring means 9.
When the power is increased to 200 W and given to the pot 5, a predetermined time T
If the temperature of the pan 5 detected by the temperature detecting means 6 has not reached the predetermined temperature θ1 even after the elapse of 2, for example, 10
When the temperature does not reach 0 ° C., it is determined that the water content of the stewed material in the pot 5 has already sufficiently boiled, and the supply of 1200 W of electric power is stopped.

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

[0017]

As described above, the first effect of the present invention is that the provision of the stirring means makes it possible to reduce the temperature of the pan at predetermined time intervals T1 when cooking stew with less power than the predetermined power W1. Until the temperature reaches the predetermined temperature θ1, the power of the power amount W2 larger than W1 is supplied to the pan, so that the water in the pan is temporarily boiled, and the ingredients for the stew cooking settled at the bottom of the pan are stirred. It is possible to obtain an induction heating cooker with good cooking performance, in which the ingredients are evenly heated.

The second effect of the present invention is that the stirring means
While stirring the stewed ingredients in the pot with large power,
The temperature of the pan detected by the temperature detecting means is maintained for a predetermined time T1.
If the temperature does not reach the predetermined temperature θ1 even after elapse, it is determined that the cooking ingredients in the pot have already been sufficiently cooked, and the supply of large electric power is stopped, so that the cooking ingredients do not collapse. Stew cooking can be performed.

[Brief description of the drawings]

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

FIGS. 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.

FIGS. 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, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. (56) References JP-A-1-292788 (JP, A) (58) Field (Int.Cl. ⁶ , DB name) H05B 6/12 A47J 27/00-27/13

Claims (2)

(57) [Claims] An induction heating device having a high-frequency power supply and a heating coil, temperature detecting means for measuring a temperature of a pot of a load heated by the induction heating device, and a heating output of the induction heating device are arbitrarily set. Power setting means, control means for receiving the output of the power setting means to control the heating output of the induction heating device, and when the heating output set by receiving the output of the power setting means is equal to or less than a predetermined output W1, Predetermined time T
A stirring means for outputting an output 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 every time. Induction heating cooker. 2. If the temperature of the pot measured by the temperature detecting means does not reach the predetermined temperature θ1 even if the increase in the heating output by the stirring means exceeds the predetermined time T2, the increase in the output by the stirring means is prohibited. The induction heating cooker according to claim 1, wherein