JP2007103289A - Induction heating cooker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an induction heating cooker in which the appearance of a cooked product is made superior, by controlling output to a plurality of heating coils according to cooking methods wherein the cooking method is determined automatically. <P>SOLUTION: This induction heating cooker is constituted of heating coils 1a, 1b, 1c capable of induction heating the heated material 5, inverter circuits 2a, 2b, 2c for supplying a high-frequency electric current respectively to the heating coils 1a, 1b, 1c, a control device 3 for controlling the output of the inverter circuits 2a, 2b, 2c and temperature-detecting means 4a, 4b, 4c for detecting the temperature of the heated material 4 the cooker has a means of determining the size of the heated material, a means of determining the kind of the heated material, and a means of determining the cooking method. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an induction heating cooker that performs a heating coil control method in accordance with a cooking method used in general households.

Conventionally, this type of induction heating cooker is configured by a plurality of heating coils, and is arbitrarily switched to select and set a heated portion or area (see, for example, Patent Document 1).
JP 62-43092 A

  However, in the conventional configuration in which the induction heating cooker is configured by a plurality of heating coils and the output of the heating coil is manually set by a changeover switch or the like, the user selects the heating power and the outputs of the plurality of heating coils. There is a problem that it is very troublesome to switch frequently according to the cooking state during cooking.

  In order to solve the above-mentioned conventional problems, an induction heating cooker according to the present invention includes a plurality of heating coils capable of induction heating an object to be heated, and each inverter circuit that supplies a high-frequency current to the heating coil is heated. A control device for controlling the output of the inverter circuit, and a temperature detection means for detecting the temperature of the object to be heated; a size determination means for the object to be heated; and a type of the object to be heated. If there is a determination means and a cooking method determination means, and the temperature variation of the heated object is small and stable, the cooking method determination means determines that the cooked food is cooked, and the output of the heating coil is alternately or irregularly heated. When the temperature of the product is lowered from 120 ° C. or higher, the cooking method determination means determines that the cooking is fried or fried, and the output of the heating coil is strengthened from the outside heating coil.

  By providing a heated object size determining means, a heated object type determining means, and a cooking method determining means as in the present invention, the output of the heating coil automatically depends on the heated object and the cooking method. Therefore, in boiled and cooked dishes, convection is generated automatically by alternating or irregular output, and it can be cooked evenly. For example, cooking that you want to harden from the outside can be done easily and in good quality.

  According to the present invention, since the output of the heating coil can be controlled automatically according to the object to be heated and the cooking method, in boiled food cooking, convection is automatically generated by outputting alternately or irregularly. It can be cooked evenly, and in cooking pottery, by strongly outputting the outside, cooking that wants to harden from the outside, such as fried eggs and hot cakes, can be made easily and well-made.

  In order to solve the above-mentioned problem, the invention described in claim 1 comprises a plurality of heating coils capable of induction heating an object to be heated, and each heating coil has an inverter circuit for supplying a high-frequency current to the heating coil. A control device for controlling the output of the inverter circuit and a temperature detection means for detecting the temperature of the object to be heated; a size determination means for the object to be heated; a kind determination means for the object to be heated; and a cooking method determination. By having a means and controlling the output to the heating coil in accordance with the result of the judging means, cooking can be easily performed with good quality.

  In the invention according to claim 2, the temperature detecting means is configured for each heating coil.

  Further, the invention according to claim 3 is configured such that when the temperature variation of the object to be heated is small and stable, the cooking method determining means determines that the cooked food is cooked, and the output of the heating coil is made alternately or irregularly. It is.

  Further, in the invention according to claim 4, when the temperature of the object to be heated falls from 120 ° C. or more, the cooking method determining means determines that the food is cooked or fried, and outputs the heating coil from the outside heating coil. It is configured to be strong.

  In the invention described in claim 5, the determination by the cooking method determination means is repeatedly performed until the heating is stopped at a fixed time period.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a schematic diagram of an induction heating cooker showing an embodiment of the present invention.

  In FIG. 1, heating coils 1a, 1b and 1c capable of induction heating an object to be heated 5, inverter circuits 2a, 2b and 2c for supplying high frequency current to the heating coils 1a, 1b and 1c, and inverter circuits 2a and 2b, respectively. 2c, and the temperature detection means 4a, 4b, 4c for detecting the temperature of the object 5 to be heated. The temperature detecting means 4a is provided at the center, 4b is formed between the heating coils 1a and 1b, and 4c is formed between the heating coils 1b and 1c. The control device 3 includes a heated object size determining unit, a heated object type determining unit, and a cooking method determining unit.

  FIG. 2 is a diagram illustrating a method for determining the size of an object to be heated. When the temperature detected by the temperature detecting means 4a, 4b, 4c rises as shown in FIG. 2 (a) after starting heating, the size determination means of the object to be heated is heated on all the heating coils. If it is determined that there is the object 5 and only the temperature detected by 4c does not increase as shown in FIG. 2B, it is determined that the size of the object to be heated 5 is smaller than the heating coil 1c. When only 4a rises like (c), it determines with the magnitude | size of the to-be-heated material 5 being smaller than the heating coil 1b.

  FIG. 3 is a diagram illustrating a type determination method and a cooking method determination method of an object to be heated. The type determination means of the object to be heated includes a step (t2) in which the heating is stopped or the output is weaker than the initial output after heating for a certain time (t1), and the temperature drop during the temperature t2 detected by the temperature detection means 4a The type of the container to be heated such as single layer, multilayer and fluorine coating is determined by ΔT1. For example, when the value of ΔT1 is small as shown in FIG. 3A, it is determined as a single layer pan, and when the value of ΔT1 is large as shown in FIG. . And after the kind determination of a to-be-heated object, as for the cooking method determination means, as shown in Fig.3 (a), the fluctuation range in the fixed time (t3) which the temperature detection means 4a detects becomes less than (DELTA) T2. If it is, it is determined to be boiled and cooked. In addition, as shown in FIG. 3B, when the temperature detected by the temperature detecting means 4a rises to about 120 ° C. or more and then the descending width during a certain time (t3) becomes ΔT3 or more, the pottery Alternatively, it is determined that the food is fried. The values of ΔT2 and T3 have different values depending on the type of the object to be heated and the magnitude of the high-frequency current output from the control device 3, and the determination by the cooking method determination means is performed with a fixed time t3 as a cycle. It shall be repeated until stop.

  The control device 3 controls the output of the high-frequency current supplied from the inverter circuits 2a, 2b, and 2c to the heating coils 1a, 1b, and 1c, respectively, based on the three determination results. The size of the object to be heated is determined to be on all the heating coils, and the cooking method is cooked according to the value of T2 determined by the type of object to be heated and the magnitude of the high-frequency current output from the control device 3 If it is determined, the output to the heating coils 1a, 1b, and 1c is supplied with high-frequency current from the inverter circuits 2a, 2b, and 2c alternately or irregularly as 1b → 1c → 1a → 1c. When the cooking method is determined to be grilled food or fried food, the output to the heating coils 1a, 1b, 1c is strongly supplied from the outside, such as 1c> 1b> 1a, and high-frequency current is supplied from the inverter circuits 2a, 2b, 2c. Is done.

  About the induction heating cooking appliance comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  By determining the size of the object to be heated, the object to be heated can be efficiently heated. In addition, by determining the cooking method and performing the output suitable for the cooking method, cooking can be easily performed and improved in quality. In boiled cooking, the output of the heating coil is performed alternately or irregularly, thereby forcibly causing convection and cooking with less boiled unevenness. In grilled food cooking, the output of the heating coil is strongly applied from the outside, making it easy to bake eggs and hot cakes from the outside and turn them upside down and finish them with good workmanship. Even when the method changes during cooking, such as stir-fry, the determination by the cooking method determination means is repeated until the heating is stopped at a fixed time t3, so that the cooking method changes when the cooking method changes. Heating can be performed by a method suitable for the method.

  As described above, in the present embodiment, since the size, type, and cooking method of the object to be heated are determined and the heating is controlled thereby, the heating can be automatically performed by a method optimal for cooking.

  As described above, the induction heating cooker according to the present invention determines the size and type of the object to be heated and the cooking method, and thereby controls the heating, so that it can be automatically heated by a method optimal for cooking. Since it can, it can apply also to the use of heating cookers, such as an induction heating cooker.

Schematic which shows the induction heating cooking appliance of Embodiment 1 of this invention. The figure which shows the size determination method of the to-be-heated material of Embodiment 1 of this invention. The figure which shows the kind determination method and cooking method determination method of the to-be-heated material of Embodiment 1 of this invention.

Explanation of symbols

1a, 1b, 1c Heating coil 2a, 2b, 2c Inverter circuit 3 Control device 4a, 4b, 4c Temperature detection means 5 Object to be heated

Claims (5)

A plurality of heating coils capable of induction heating the object to be heated, each of the heating coils having an inverter circuit for supplying a high-frequency current to the heating coil, and a control device for controlling the output of the inverter circuit; A temperature detecting means for detecting the temperature of the heated object, comprising a size determining means for the heated object, a type determining means for the heated object, and a cooking method determining means, and depending on the result of the determining means An induction heating cooker that controls output to a heating coil. The induction heating cooker according to claim 1, wherein the temperature detecting means is configured for each heating coil. The induction according to claim 1 or 2, wherein when the temperature variation of the object to be heated is small and stable, the cooking method determination means determines that the cooked food is cooked, and the output of the heating coil is alternated or irregular. Cooking cooker. 2. When the temperature of the object to be heated falls from 120 ° C. or more, the cooking method determination means determines that the cooking is to be baked or fried, and the output of the heating coil is increased from the outside heating coil. Or the induction heating cooking appliance of 2. The induction heating cooker according to any one of claims 1 to 4, wherein the determination by the cooking method determination means is repeatedly performed until heating is stopped at a fixed time period.

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