JP2580257Y2 - Rotary 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 a rotary electromagnetic induction heating cooker.

[0002]

2. Description of the Related Art In stewed cooking of curry, stew, etc., it is necessary to stir with a ball or the like appropriately so that there is no uneven stew. In addition, it is necessary to stir and stir so that the whole well cooks.
For this reason, conventionally, various cookers have been proposed which can cook while stirring the ingredients automatically. For example, JP-A-63-175375 and JP-A-4-21231
No. 6, JP-A No. 6-204, in which a cooking pot is rotatably provided in a processing vessel, and an electromagnetic heating coil is provided so as to surround the bottom and side surfaces of the cooking pot, while the processing vessel itself can be tilted on a base. Cookers have been proposed.

[0003]

However, in the conventional cooking device, since the induction heating coil is disposed so as to surround the periphery of the side surface of the cooking pot, the induction heating coil is disposed above the surface of the food in the inclined container. The portion is heated by the induction heating coil and heats up to a higher temperature than the lower portion, although it is not necessary to heat the portion. For this reason, when the portion that generated heat at a high temperature turned downward, the foodstuffs were sometimes scorched. In addition, there is a problem that the induction heating control is difficult because the load is different between the upper part and the lower part of the foodstuff. The present invention has been made in view of such a problem, and an object of the present invention is to provide a rotary induction heating cooker that can efficiently heat a portion below the surface of food in an inclined container and is easy to control. And

[0004]

In order to achieve the above object, the present invention provides a main body having an inclined container mounting portion having a semi-cylindrical curved surface, and the container mounting portion of the main body being inclined. A container to be placed, a rotation driving means for rotating the container in an inclined state, and an induction heating coil provided along a semi-cylindrical surface of a main body opposed to a lower side surface of the container in the inclined state. Electromagnetic induction heating means for heating the foodstuff inside by heating, temperature detecting means for detecting the temperature of the bottom outer surface of the container in a non-contact manner with respect to the container, and based on the temperature of the container detected by the temperature detecting means Control means for adjusting the temperature of the container to a preset temperature by controlling the electromagnetic induction heating means. in this case,
The temperature detecting means includes a primary side induction coil provided on the main body, and a temperature detection circuit including a thermistor provided on the bottom of the container and a secondary side induction coil facing the primary side induction heating coil. It is preferable to configure.

[0005]

According to the above construction, the container is rotated by the rotation driving means, and generates heat by the induction heating action of the induction heating means. Thereby, the foodstuff inside the container is heated while being stirred. Since the induction heating coil is provided along the semi-cylindrical surface of the main body facing the lower side surface of the inclined container, only the part below the surface of the food inside the container generates heat and heats the food. I do. Therefore, the induction heating coil always faces the foodstuff via the container wall, and the heating is controlled under a uniform load.

[0006]

Next, an embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 1 shows a rotary induction heating cooker according to the present invention. In FIG. 1, a container 2 having a lid 1 is made of a material that generates heat by induction heating such as stainless steel, and is relatively deep. In the concave portion 3 provided at the center of the bottom outer surface of the container 2,
Thermistor 4 and secondary-side induction coil 5 are accommodated, and these form a closed temperature detection circuit 6 as shown in FIG. The main body 7 has a container mounting portion 8 formed of a semi-cylindrical curved surface. The axis of the semi-cylindrical curved surface of the container mounting portion 8 is inclined with respect to the horizontal plane, so that the container 2 can be mounted in an inclined state. The container mounting portion 8 has a support roller 9 that rotatably supports the container 2 in contact with the outer surface of the container 2, a protrusion 10 that supports the bottom outer surface of the container 2, and a pressure contact with the outer peripheral surface of the container 2. And a drive roller 12 driven by a motor 11 to rotate the container 2 about its axis.

[0007] Inside the main body 7, an induction heating coil 14 is provided along the semi-cylindrical curved surface so as to face the lower side surface of the container 2, that is, the side surface below the surface of the food material put in the container 2. It is wound in a substantially saddle shape. The induction heating coil 14 is controlled by an induction heating device 15. A primary induction coil 16 is accommodated inside the projection 10 so as to face the secondary induction coil 5 of the container 2. Although not shown, a temperature setting key, a menu setting key,
A time setting key, a start key, and a buzzer are provided. Reference numeral 17 denotes a control device provided with a microcomputer, which controls the motor 11 and the induction heating device 15 according to a set temperature and a menu by executing a predetermined program. In addition, the control device 17 can detect the presence or absence of the container 2 by detecting a value at which a current flows through the induction heating device 15.

Hereinafter, the operation of the electromagnetic induction heating cooker by the control device 17 will be described with reference to the flowchart shown in FIG. First, in step 101, input of each key of temperature setting, menu setting and time setting is received, and in step 10
In step 2, it is determined whether the start key has been pressed. If the start key has not been pressed, the process returns to step 101 and waits until pressed. If the start key has been pressed, it is determined in step 103 whether or not the container 2 has been set in the main body 7 based on the current flowing through the induction heating device 15. Judge. If the container 2 is not set, the absence of the container is notified by a buzzer in step 104, and if set, a drive signal is output to the motor 11 in step 105 to start the rotation of the container 2.

Subsequently, at step 106, the induction heating device 1
An operation signal is output to 5 to start heating. During the heating, the temperature of the container 2 is detected in step 107 to control the temperature to the set temperature or the temperature according to the set menu. Then, if the completion condition is satisfied in step 108, a stop signal is output to the motor 11 and the induction heating device 15 in step 109 to stop the rotation and heating of the container 2, and then an end is notified by a buzzer or the like.

[0010] By operating the control device 15 in this manner, stew cooking and stir-fry cooking can be easily performed without burning. For example, to describe stir-fried cooking such as fried noodles, first, the container 2 is set on the main body 7, the temperature and time are set, and the start key is pressed. This allows
The motor 11 drives the drive roller 12 to rotate, and the container 2
Rotates in a state of being inclined on the main body 7. At the same time,
When the induction heating device 15 is operated, only the lower side surface of the container 2 facing the induction heating coil 14 generates heat. When the container 2 has been heated to some extent, oil is added, and at the time when the oil has sufficiently spread on the inner surface of the container 2, the ingredients and necessary seasonings are added and the lid 1 is closed. Thereby, the material in the container 2 is heated and cooked while being stirred. If only the menu is set, the heating pattern of the temperature and time stored in advance in the memory of the control device 17 is set according to the menu, and the control is performed according to the set heating pattern.

During cooking, the control device 15 constantly supplies current to the primary side induction coil 16, so that current flows to the temperature detection circuit 6 on the secondary side by electromagnetic induction. Since the resistance of the thermistor 4 of the secondary-side temperature detection circuit 6 changes due to a change in the temperature of the container 2, it constitutes a secondary-side load. Therefore, by detecting a change in the impedance on the primary side, a change in the primary side load, that is, a temperature change can be known in a non-contact manner. The secondary side detection circuit 6 is provided at the center of the bottom outer surface of the container 2 and detects the temperature at a position sufficiently distant from the induction heating coil 14.
The detection accuracy is good without being directly affected by the heat generation of the laser beam. In the container 2, only the lower side facing the induction heating coil 14, that is, the side below the internal material generates heat by the induction heating action, and the side above the material does not generate heat. Therefore, unlike the related art, the side surface above the material generates abnormal heat and does not burn the material when it goes down.

Further, since the induction heating coil 14 is located below the surface of the material in the container 2, the coil 14 is always opposed to the material and is under a load. As described above, in the conventional cooker, the induction heating coil is provided around the container and simultaneously heats a portion having no load above the material and a portion having a load below the material, Control was difficult. On the other hand, this cooker heats only the portion where the load is applied, so it is easy to control,
Subtle heat adjustment can be performed.

[0013]

As is clear from the above description, according to the present invention, the portion below the surface of the food in the container is effectively heated, so that the portion above the surface of the food as in the prior art is heated. There is no problem such as burning food due to abnormal heat generation, and uniform cooking can be performed. Further, since the load of the induction heating coil becomes uniform, heating control is easy. In particular, according to the invention of claim 2, since the induction heating coil detects the temperature at the bottom surface sufficiently distant from the opposite side surface of the container, the temperature of the food material inside the container can be accurately detected, and the subtlety. Can adjust heat power. Further, according to the invention of claim 3,
Since the temperature detecting means detects the temperature of the container in a non-contact manner with respect to the rotating container, there is no abrasion, poor contact or failure of the contact part as in the contact type, and the reliability of the detected temperature is high and the life is long .

[Brief description of the drawings]

FIG. 1 is a sectional view of a rotary induction heating cooker according to the present invention.

FIG. 2 is a sectional view taken along line II of FIG. 1;

FIG. 3 is a control block diagram of the cooking device of FIG. 1;

FIG. 4 is a control flowchart of the cooking device of FIG. 1;

[Explanation of symbols]

2 ... container, 4 ... thermistor, 5 ... secondary side induction coil, 6 ... circuit for temperature detection (temperature detection means), 7 ... body, 8 ... container mounting part, 11 ... motor (rotation drive means), 12 ... Driving roller (rotation driving means), 14: induction heating coil, 15: induction heating device, 16: primary side induction coil, 17: control device

Claims (2)

(57) [Scope of request for utility model registration] 1. A main body having an inclined container mounting portion having a semi-cylindrical curved surface, a container mounted on the container mounting portion of the main body in an inclined state, and rotating the container in an inclined state. Rotation driving means, and electromagnetic induction heating means for heating the container by heating the container with an induction heating coil provided along a semi-cylindrical surface of the main body facing the lower side surface of the container in the inclined state, Temperature detecting means for detecting the temperature of the outer surface of the bottom of the container in a non-contact manner with respect to the container; and controlling the electromagnetic induction heating means based on the temperature of the container detected by the temperature detecting means. And a control means for adjusting the temperature to a preset temperature. 2. The temperature detecting means comprises: a primary induction coil provided on the main body; a temperature sensor comprising a thermistor provided on the bottom of the container and a secondary induction coil opposed to the primary induction heating coil. 2. The rotary electromagnetic induction heating cooker according to claim 1, wherein the rotary electromagnetic induction cooker comprises a detection circuit.