JP4972905B2 - Induction heating cooker - Google Patents

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 an inner heating coil and an outer heating coil provided outside thereof, a heating coil capable of induction heating an object to be heated, and the heating Inverter circuit for supplying high-frequency current to the coil, control device for controlling the output of the inverter circuit, temperature detecting means for detecting the temperature of the object to be heated, and cooking for determining that the cooking method is cooked food A method determination unit, and when the cooking method determination unit determines that the cooked food is cooked because the temperature variation of the object to be heated is small and stable during heating at a predetermined output. Is configured to supply a high-frequency current alternately to the inner heating coil and the outer heating coil.

An induction heating cooker according to the present invention includes an inner heating coil and an outer heating coil provided outside the heating coil that can induction-heat an object to be heated, and an inverter that supplies a high-frequency current to the heating coil. A circuit, a control device for controlling the output of the inverter circuit, temperature detection means for detecting the temperature of the object to be heated, and a cooking method determination means for determining that the cooking method is grilled food or fried food cooking. Provided, when the cooking method determination means determines that the cooked or fried food is cooked because the temperature of the object to be heated has dropped from 120 ° C. or higher during heating at a predetermined output, wherein by supplying a large high-frequency current from said inner heating coil on the outside of the heating coil is obtained by a configuration in which Ru baking an object to be heated from the outside.

By providing the management method determination means adjusted as in the present invention, automatically in response to the cooking method of the object to be heated, it is possible to control the output of the heating coil, in Nitaki was cooked, and outputs alternating or irregularly Thus, convection is automatically generated and cooking can be performed without unevenness. In the pottery cooking, by strongly outputting the outside, cooking that is desired to be hardened from the outside, such as fried eggs and hot cakes, can be easily made with good quality.

According to the present invention, since the output of the heating coil can be automatically controlled according to the cooking method of the object to be heated, in boiled food cooking, convection is automatically caused 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 is a heating coil having an inner heating coil and an outer heating coil provided on the outer side thereof, capable of inductively heating an object to be heated, and a high-frequency current in the heating coil. An inverter circuit that supplies the output, a control device that controls the output of the inverter circuit, temperature detection means that detects the temperature of the object to be heated, and a cooking method determination means that determines that the cooking method is cooked food. And when the cooking method determination means determines that the cooked food is cooked because the temperature variation range of the heated object is small and stable during heating at a predetermined output, By alternately supplying a high-frequency current to the inner heating coil and the outer heating coil, it can be easily cooked with good quality.

According to a second aspect of the present invention, there is provided a heating coil having an inner heating coil and an outer heating coil provided outside thereof, capable of inductively heating an object to be heated, and 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 detection means for detecting the temperature of the object to be heated, and a cooking method determination means for determining whether the cooking method is grilled food or fried food cooking. When the cooking method determination means determines that the grilled or fried food is cooked because the temperature of the object to be heated has decreased from 120 ° C. or higher during heating at a predetermined output, the control device wherein in the heating coil supply a large high-frequency current from said inner heating coil is obtained by so that configure baked an object to be heated from the outside.

In the invention according to claim 3, 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 view 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 method for determining the type of an object to be heated and a method for determining a cooking method. 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 ΔT1 determines the type of container to be heated, such as single layer, multilayer, and fluorine coating. 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, FIG.
As described above, when the temperature detected by the temperature detecting means 4a rises to about 120 ° C. or more and the descending width during a certain time (t3) becomes ΔT3 or more, it is determined that the food is cooked or 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 a 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 cooking method of the object to be heated and controls the heating thereby, so that it can be automatically heated by a method optimal for cooking. It is applicable also to the use of heating cookers, such as a 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.

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 (3)

A heating coil having an inner heating coil and an outer heating coil provided outside thereof, capable of inductively heating an object to be heated, an inverter circuit for supplying a high-frequency current to the heating coil, and controlling an output of the inverter circuit A controller, temperature detection means for detecting the temperature of the object to be heated, and cooking method determination means for determining that the cooking method is cooked food, and the cooking method determination during heating at a predetermined output When the means determines that the cooked food is cooked because the temperature fluctuation range of the object to be heated is small and stable, the control device alternately switches the high-frequency current to the inner heating coil and the outer heating coil. Supplying induction heating cooker. A heating coil having an inner heating coil and an outer heating coil provided outside thereof, capable of inductively heating an object to be heated, an inverter circuit for supplying a high-frequency current to the heating coil, and controlling an output of the inverter circuit A controller, temperature detection means for detecting the temperature of the object to be heated, and cooking method determination means for determining whether the cooking method is grilled food or fried food cooking, and cooking during heating at a predetermined output When the method determination means determines that the grilled food or the stir-fried food is cooked because the temperature of the object to be heated has dropped from 120 ° C. or higher, the control device causes the outer heating coil to be more than the inner heating coil. induction heating cooker Ru baking the object to be heated from the outside by supplying a large high-frequency current. The induction heating cooker according to claim 1 or 2, wherein the determination by the cooking method determination means is repeatedly performed until heating is stopped at a predetermined time interval.

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