JPH07263132A - Electromagnetic induction heating device - Google Patents

Abstract

PURPOSE:To heat a cooking part from a plurality of directions so as to shorten cooking time, by cooking a material by a heating means provided in an auxiliary heating member. CONSTITUTION:A container 3 containing a material 16 to be cooked is laid on an insulation plate 4 and covered with an auxiliary heating member 8. Cooking function, heating time, and heating force are set by an operation part 7 and a coil 2a for heating is energized by high frequency current generated from a high frequency drive circuit part 5. Induction current thus flows in the bottom of the container 3 so as to heat the material 16 to be cooked. At the same time, a coil 2b for power transmission is energized so that a receiving coil 9 is inductively connected to high frequency current of the coil 2b and induces high frequency voltage for driving. This high frequency voltage is supplied to a heater part 11 via a thermostat 17 so as to heat the heater part 11 till reaching prescribed temperature of the thermostat 17. Voltage induced in the coil 2b is thus received by connecting a heating element to the coil 9 so that the material 16 to be cooked is heated from the bottom, at the same time heated from the top by the heater part, and the thermostat 17 can prevent overheating of the inside of the member 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic induction heating device having heating means for generating heat by an induction voltage of an induction coil.

[0002]

62 to 64 are diagrams showing a conventional technique. First, the conventional technique shown in FIG. 62 will be described. FIG. 62 shows a cross-sectional view of a conventional electromagnetic induction heating device,
In the figure, 1 is a device main body, 2 is a heating coil, 3 is a conductive container, 4 is an insulating plate, 5 is a high-frequency drive circuit unit, 6 is a control unit, 7 is an operation unit, and 15 is a temperature detection unit. .

Next, the operation will be described. The control unit 6 determines the drive output in response to the input command from the operation unit 7, and the high frequency drive circuit unit 5 thereby generates a high frequency current. The generated high-frequency current is applied to the heating coil 2, and the bottom surface of the conductive container 3 placed via the insulating plate 4 directly above the coil causes resistance loss to generate Joule heat, and the container 3 itself generates heat. . The food 16 is heated by the heat generated by the container.

Next, another conventional example of the induction cooking device will be described. FIG. 63 is a sectional view of an induction cooker described in, for example, Japanese Patent Publication No. 56-30677, showing a device for obtaining a driving voltage for a mixer from an induction coil. In addition, FIG.
4 is a circuit block diagram. In the figure, 2 is a heating coil, 4 is an insulating plate, 5 is a high frequency drive circuit section, 6 is a control section, 9 is a power receiving coil that electromagnetically couples with the heating coil 2, 85 is a rectifier, and 86 is direct current. The motor, 87 is a rotating body, and is provided with a mixer blade. When the high-frequency current generated in the high-frequency drive circuit unit 5 is applied to the heating coil 2, the high-frequency current is electromagnetically coupled with the high-frequency current of the power receiving coil 9 and once replaced with direct current, it is full-wave rectified by the rectifier 85. , Drive the motor 10. And the rotating body 8
7 is driven and the blade rotates.

[0005]

In the conventional electromagnetic induction heating device, only the bottom surface of the container is heated by the heating coil, which is limited to heating from the container and is sufficient for various cooking methods. I could not respond. In addition, in the conventional technology in which the energy from the heating coil is used for another purpose, all of the induced voltage is used for another purpose, and the energy from the heating coil is used not only for induction heating but also for other heating. It is not a configuration that can be used for any purpose. Further, in the conventional configuration, since the induced voltage is once changed to the direct current, a high frequency rectifier for a special purpose is required due to the large amount of current used, which causes a problem that it is expensive.

The present invention has been made in order to solve the above-mentioned problems, and high-frequency waves induced in the power receiving coil not only in the container side but in the heating direction without impairing the original heating characteristics. An object of the present invention is to obtain a device capable of heating a cooking product by heating a heating heater which is another heating means by a voltage and heating the cooking product from a plurality of directions at the same time.

[0007]

In an electromagnetic induction heating apparatus according to the present invention, a first induction coil for induction heating a container for storing food and a second induction coil provided outside the first induction coil. A third induction coil that is provided so as to face the second induction coil and is electromagnetically coupled to the second induction coil, and heat is generated based on the induced voltage of the third induction coil. And an auxiliary heating member having a heating means for heating the cooked food.

Also, a main body having a first induction coil for inductively heating a container for storing food and a second induction coil provided outside the first induction coil, and detachably mounted on the main body. When a lid that is placed and forms a cooking chamber with the main body is placed on the main body, a third induction coil electromagnetically coupled to the second induction coil and an induced voltage of the third induction coil are applied. And an auxiliary heating member having a heating means for generating heat based on the above and heating the cooked food.

The heating means is connected in series with the third induction coil via a temperature switching element.

Further, the auxiliary heating member is provided with a temperature adjusting circuit which rectifies the induced voltage of the third induction coil into a direct current and operates by the direct current.

Further, a main body having a first induction coil for inductively heating a container for containing food to be cooked and a second induction coil provided outside the first induction coil, and rotatably attached to the main body. When the lid provided is placed on the main body, the second
And an auxiliary heating member having a third induction coil electromagnetically coupled to the induction coil and heating means for heating the cooked product by generating heat based on the induced voltage of the third induction coil. is there.

Further, a main body having a first induction coil for inductively heating a container for containing food and a second induction coil provided outside the first induction coil, and a main body mounted on the main body. A third electromagnetically coupled to the second induction coil when a lid that forms a cooking chamber between the
And an auxiliary heating member having heating means for heating the food to generate heat based on the induced voltage of the third induction coil, and the lid body is divided into two parts and is divided into two parts. One of the lids is rotatably provided on the main body.

Also, a main body having a first induction coil for inductively heating a container for containing food to be cooked and a second induction coil provided outside the first induction coil, and a main body mounted on the main body. A third electromagnetically coupled to the second induction coil when a lid that forms a cooking chamber between the
And an auxiliary heating member having a heating means for heating the food to generate heat on the basis of the induced voltage of the third induction coil, and the lid body is formed in at least two divisions. One of the closed lids is attached to the other lid by a rotating means.

Further, it has an apparatus main body and a container which is detachably accommodated in the main body, and an induction coil is provided on each of a bottom portion and a side wall portion of an accommodation portion of the container in the main body, and the induction coil is detachably attached to an upper portion of the body. Based on the induced voltage of the auxiliary body, the auxiliary induction coil electromagnetically coupled to the induction coil of the side wall when the lid body is mounted on the main body, And an auxiliary heating member having a heating means for heating the food to generate heat.

Further, the apparatus has a main body and a container detachably accommodated in the main body, and induction coils are provided on the bottom and side walls of the container accommodating portion in the main body so that the main body can be detachably attached to the upper part of the main body. Based on the induced voltage of the auxiliary body, the auxiliary induction coil electromagnetically coupled to the induction coil of the side wall when the lid body is mounted on the main body, An auxiliary heating member having a heating means for generating heat to heat the food to be cooked is provided, and the heating means is detachably provided on the lid.

Further, an auxiliary heating member having a main body provided with an induction coil and a heating means for heating the cooked product by generating heat based on the induced voltage of the auxiliary induction coil electromagnetically coupled to a part of the induction coil. , Are provided.

Further, a main body provided with a main induction coil for inductively heating the cooking container, a main body frame detachably provided on the upper surface of the main body and surrounding the cooking container, and a lid body detachably mounted on the upper part of the main body frame. Is generated in the auxiliary induction coil electromagnetically coupled with a part of the main induction coil to generate heat,
An auxiliary heating member having a heating means for heating the food,
It is equipped with.

[0018]

In the electromagnetic induction heating device according to the present invention,
A first induction coil for induction heating the container, and a heating means for heating based on an induction voltage of a third induction coil electromagnetically coupled to a second induction coil provided outside the first induction coil. Cook the food.

Further, the main body having the first induction coil and the second induction coil for inductively heating the container is heated by the induced electric power of the third induction coil electromagnetically coupled to the second induction coil. The lid provided with the means is detachably mounted.

The temperature of the heating means is controlled by a temperature switching element connected in series with the third induction coil.

The temperature of the auxiliary heating member is controlled by a temperature adjusting circuit which operates by making the induced voltage of the third induction coil a direct current.

Further, the main body having the first induction coil and the second induction coil for inductively heating the container is heated by the induced electric power of the third induction coil electromagnetically coupled to the second induction coil. A lid provided with means is rotatably provided.

Further, the main body having the first induction coil and the second induction coil for inductively heating the container is heated by the induced electric power of the third induction coil electromagnetically coupled to the second induction coil. The lid provided with the means is formed in a two-divided configuration, and one of the divided lids is rotatably provided on the main body.

Further, the main body having the first induction coil and the second induction coil for inductively heating the container is heated to generate heat by the induced power of the third induction coil electromagnetically coupled to the second induction coil. The lid body provided with the means is formed in at least two divided structures, and one of the divided lid bodies is provided on the other lid body as the rotation means.

In addition, an induction coil is provided on each of the bottom and side walls of the container housing in the main body, and the container is induction-heated by the bottom induction coil, and an auxiliary induction coil electromagnetically coupled to the induction coil on the side wall is provided. The food to be cooked is heated by a heating means that generates heat with an induced voltage.

Further, an induction coil is provided on each of the bottom portion and the side wall portion of the container housing in the main body, and the main body is provided with heating means for generating heat based on the induced voltage of the auxiliary induction coil electromagnetically coupled to the side wall induction coil. It is detachably attached to the lid placed on the upper part of the.

Further, heat is generated based on the induced voltage of the auxiliary induction coil electromagnetically coupled to a part of the induction coil provided in the main body to heat the food.

Further, the main induction coil for inductively heating the container provided in the main body and the main induction coil mounted on the upper surface of the main body to cover the container detachably mounted thereon are electromagnetically coupled with a part of the main induction coil. Cooking is cooked by a heating means that generates heat based on the electromotive voltage of the auxiliary induction coil.

[0029]

【Example】

Example 1. 1 to 9 are views showing an embodiment of the present invention, FIG. 1 is a sectional view showing the embodiment 1, FIG. 2 is an exploded perspective view, FIG. 3 is a circuit diagram, and FIG. 4 is a configuration diagram of a coil. 5, FIG. 5 is a configuration diagram of an operation unit, FIG. 6 is an exploded configuration diagram of a heater unit and a heater support unit, FIG. 7 is a partial cross-sectional view of an auxiliary heating member ceiling portion, FIG. 8 is a block diagram, and FIG. 9 is FIG. It is a corresponding circuit diagram. In the figure, 1 is a main body of an electromagnetic induction heating device, 2 is an induction coil on the main body side, which includes a heating coil 2a that is a first induction coil and a power transmission coil 2b that is a second induction coil,
For example, as shown in FIG. 4, they are provided in the inner and outer regions, respectively. Reference numeral 3 denotes a conductive container in which the food 16 is placed, and is composed of, for example, an iron pot. An insulating plate 4 is made of, for example, a ceramic plate. Insulation plate 4
In order to facilitate the positioning when mounting the auxiliary heating member 8 on the main body 1, the mounting position is shown by a dotted line 4a, for example. Reference numeral 5 is a high-frequency drive unit, 6 is a control unit including a high-frequency oscillation circuit, a synchronizing circuit, and the like, 7 is an operation unit, and the operation unit 7
The control unit 6 receives an input command from the control unit 6 and outputs it to the high frequency drive unit 5. The operation unit 7 has the configuration shown in FIG. 5, for example, and details will be described later. 8
Is an auxiliary heating member of the electromagnetic induction heating device, and 13 is an outer frame of the auxiliary heating member. 9 is a third provided on the auxiliary heating member 8
Of the induction coil, which is provided so as to face the power transmission coil 2b and has the auxiliary heating member 8 mounted on the main body 1 so that the energy from the power transmission coil 2b can be sufficiently received. For example, it is provided immediately above the power transmission coil 2b, and in the first embodiment, it is formed by a coil of about 10 turns. Reference numeral 10 denotes a case of the power receiving coil 9, which is made of, for example, a heat resistant resin. Reference numeral 11 is a heater portion having a resistance wire 12 which is a heating element, and a heater support 14 made of, for example, an iron plate or the like on the ceiling portion of the outer frame 13.
It is fixed to. Reference numeral 15 is a temperature detecting portion provided in the main body, 16 is a cooked food, 17 is a thermostat which is a temperature switching element provided in the auxiliary heating member, and 18 is a handle attached to the auxiliary heating member 8. The auxiliary heating member 8 is the main body 1
It is removably placed on.

The structure of the heater portion 11 and the heater support portion 14 will be described with reference to FIGS. 6 and 7. As shown in FIG. 6, the heater portion 11 is provided with a hole portion 11 a, and as shown in FIG. 7, the tip end portion 14 a of the heater support portion 14 is inserted into the hole portion 11 a of the heater portion 11, and the outer frame 13 is inserted. Then, the tip portion 14a is bent with a predetermined gap, and the heater portion 11 is fixed to the ceiling portion of the outer frame 13. The heater support 14 is fixed to the outer frame 13 by spot welding, for example.

Next, the operation unit 7 will be described below with reference to FIG. In the figure, 19 is a function selection key group, 20 is an LED
A display group, 21 is a heating stop key, and 22 is a timer section. 19d, 19e, and 19f of the function selection key group 19 are "pot" key 19a and "fried" key 19b, respectively.
This is a display portion provided corresponding to the "oven" key 19c. The LED display group 20 also serves as the thermal power function display 20a and the temperature function display 20b. The timer unit 22 is composed of a timer setting key 22a and a timer display unit 22b.

First, description will be given of the case where cooking is performed without using the auxiliary heating member 8 such as pan dishes. For example, when cooking a pot, heating is started by operating the "pot" key 19a, and at the same time, the display unit 19d and the LED display group 2 are displayed.
The "strong" LED of 0 lights up, and heating operation is performed with the heating power "strong". To adjust the heating power, "pot" key 1
By operating 9a multiple times, L between "strong" and "warm"
Since the EDs are sequentially turned on, a desired heating power can be set. Similarly, in the case of fried food, heating is started by operating the "fried food" key 19b, the display unit 19e is turned on and the LED display group 20 is turned on, "200" is turned on, and the oil temperature is executed at "200" degrees. It The temperature control can be performed by operating the "fried food" key 19b a plurality of times, as in the hot pot dish, from "warm" to "200" degrees. Next, a case where a dish using the auxiliary heating member 8, which is a feature of the present invention, for example, a dish requiring an oven function is performed will be described. In this case as well, it is similar to the pan dish and fried dish, and the operation is started by operating the "oven" key 19c, and the "strong" (or "200" degree) LED of the display unit 19f and the LED display group 20 is turned on. To do. Similarly, the temperature can be adjusted from "strong" to "warm" (or "200" degrees to "warm") by operating the "oven" key 19c a plurality of times.

In any of the dishes, the heating stop key 21 is operated to stop the heating operation. Further, when setting the heating time, when the timer setting key 22a is operated, for example, a plurality of times, the timer display portion 22b cyclically changes and a predetermined time can be set. Figure 5
In the above, the top display of the timer display part 22b is "pot"
It is a time display when the key is operated or when the "fried food" key is operated, and here, 15 to 90 minutes can be set.
On the other hand, the lower display of the timer display 22b is a time display when the "Oven" key is operated, and is set to be automatically switched to the lower 2 to 12 minutes display by operating the "Oven" key 19c.

The operating portion may be designed according to the cooking function, heating power, heating time, etc., and is not limited to that shown in FIG. Further, the heating time may be configured to indicate the remaining time as time passes, and the heating power may be configured to notify the present temperature by blinking due to a temperature change.

Next, the operation when cooking using the auxiliary heating member 8 which is a feature of the present invention will be described.
First, the container 3 containing the food 16 is placed inside the dotted line 4 a of the insulating plate 4, and the auxiliary heating member 8 is placed on the dotted line 4 a of the insulating plate 4. Then, a desired cooking function, heating time, heating power, etc. are set by the operation unit 7. The control unit 6 responds to a command from the operation unit 7 to the high frequency drive circuit unit 5
Drive control is performed. The high frequency current generated in the high frequency drive circuit section 5 is applied to the coil 2. Heating coil 2
When a is energized, an induction current flows on the bottom surface of the conductive container 3 due to the principle of electromagnetic induction heating, and the current causes resistance loss on the bottom surface of the container to generate Joule heat, causing the container itself to generate heat and heat the food 16 to be cooked. Will start. On the other hand, when the power transmission coil 2b is energized, the power reception coil 9 is induced by being coupled with the high frequency current of the power transmission coil 2b, and is driven by the high frequency voltage. Then, as shown in FIG. 3, the voltage induced in the power receiving coil 9 is supplied to the heater unit 11 connected in series via the thermostat 17, and if the temperature is equal to or lower than the predetermined temperature of the thermostat 17, the heating is continued. To do. When the heating time is set in advance by the operation unit 7, the control unit 6 controls the high frequency drive circuit unit so that the heating is continued with a predetermined heating force until the heating time elapses and the heating is stopped after the heating time elapses. Control 5 Further, the control unit 6 may, if necessary,
The heating process may be automatically controlled after the heating time. In this way, the coil 2 provided on the main body side
Is divided into a heating coil 2a region and a power transmission coil 2b region, and a power receiving coil 9 induced by the power transmission coil 2b.
Since the heating element is connected to the container, the container itself can be heated to heat the lower surface of the food 16 and at the same time, the upper surface can be heated by the heater unit.

Further, since the thermostat is connected between the power receiving coil and the resistance wire (load), the heating can be stopped when the temperature inside the auxiliary heating member reaches a predetermined temperature, and a flame accident due to overheating of the cooked food can be prevented.

In the first embodiment, the number of turns of the coil 2 is, for example, about 18, and the input power 120 is applied to this winding.
Supply 0W. The number of turns of the power transmission coil 2b is
The size of the power receiving coil 9 and the diameter of the container to be placed were appropriately selected and set to 1/3 of the total number of turns. In this state, by appropriately selecting the resistance wire of the heater portion, the voltage induced in the power receiving coil 9 was set to a relatively low potential of 30 V or less, and an electric shock was taken into consideration. Moreover, the diameter of the container 3 is about 160 mm.
The resistance value of the heater portion 11 is set to 15Ω, and two resistance wire units are connected in parallel to form a low impedance as shown in FIG.

With the above configuration, for example, when about 800 W is supplied to the heating coil 2a and about 400 W is supplied to the heater 11 of the auxiliary heating member 8, it takes 2 to 3 minutes to heat the toast or the like. The heating is completed with. When it is necessary to equalize the burnt condition on the front and the back of the toast in the finished state after the predetermined cooking time, the energy for heating the container on the insulating plate and the energy for radiant heating by the heater part must be balanced. Therefore, in the present Example 1, the winding ratio and the resistance value of the heater resistance wire were selected in consideration of these points.

However, the number of turns of the coil, the shape, the material of the container, and the shape of the resistance wire are not limited to those shown in FIGS.
It may be designed appropriately according to the input power and the required heating power.

When the container side is overheated, the temperature detecting unit 15 detects abnormal heating, and the control unit controls the high frequency driving unit so as to stop the output to stop the energization (heating) of the coil 2. Abnormal heating on the auxiliary heating member 8 side is detected by the thermostat 17, and the circuit is cut off to stop the energization (heating). In the first embodiment, as long as normal heating drive is performed, the power supply to the coil 2 on the main body side is stopped, and the energy supply to the auxiliary heating member 8 side is also stopped.

The mounting position of the thermostat according to the first embodiment is provided near the center of the wall inside the auxiliary heating member so that the thermostat is hardly affected by heat transfer from the heater and can be detected by the temperature of the cooking chamber. Further, when the operating temperature (contact opening temperature) of the thermostat is lowered to use a thermostat made of a material having a low insulation temperature, the thermostat may be provided outside the outer frame of the auxiliary heating member.

Next, the coil 2 will be described with reference to FIGS.
The control method of will be described. In the figure, 23 is a microcomputer (hereinafter referred to as a microcomputer), 24 is an output setting unit, for example, a DA converter (shown in FIG. 9). Two
5 is a drive circuit section, 26 is a drive section, 27 is a switching section, 28 is a commercial power source, 29 is a rectifying section, 30 is a current detecting section, and 31 is a voltage detecting section. Here, the microcomputer 23
The output setting unit 24, the current detection unit 30, and the voltage detection unit 32 are provided in the control unit 6, and the drive circuit unit 25,
The drive unit 26 and the switching unit 27 are provided in the high frequency drive unit 5. The operation unit 7 and the microcomputer 23 exchange signals, input a command from the operation unit 7 to the microcomputer 23, and perform control according to the signal from the operation unit 7. For example, when the "oven" key 19c is operated on the operation unit 7, the microcomputer 23 reads and the display unit 19f and the LED
A "strong" (or "200" degree) lighting signal of the display group 20 is output, and at the same time, a signal is output to the output setting unit 24 (DA converter) so as to output a potential corresponding to the maximum output. The output setting unit 24 converts this signal into a voltage signal, applies the voltage to the drive circuit unit 25, and controls the conduction width of the switching unit 27. Normally, the conduction width is about 25 at maximum heat
The driving unit 26 amplifies this conduction signal and adds it to the control gate of the element of the switching unit 27. On the other hand, in the main power circuit, the commercial power supply 28 is connected to the rectification unit 29.
Full-wave rectification is applied to the coil 30, which is a load, and is chopped by the switching unit 27 to be converted into a high frequency current of, for example, about 25 KHz. According to the Radio Law, there is a limit of 20.5KHz or more and 100KHz or less. Here, 25KH is used to reduce loss.
z.

Further, the current detector 3 which is a part of the controller 6
Reference numeral 0 denotes a current transformer, which converts the switching current of the switching unit 27 into a voltage and inputs the voltage into the AD conversion port of the microcomputer 23. The microcomputer 23 determines whether or not the current is a predetermined current, and outputs a signal to the output setting unit 24 so that an appropriate current flows. When the current is smaller than a predetermined value, the output setting voltage is increased so as to widen the conduction width, and when the current is larger than the predetermined value, the output setting voltage is reduced so as to narrow the conduction width. Further, the voltage detection unit 31, which is a part of the control unit 6, detects the collector voltage of the switching unit 27 and outputs it to the A / D conversion of the microcomputer 23, and if it exceeds a predetermined voltage value, the drive circuit unit. Control to stop the output. When the relay contact of the switching unit 27 is disconnected, the voltage detection unit 31 detects the voltage increase of the switching unit 27 and performs control. When the circuit on the auxiliary heating member side is opened while the coil 2 is energized, the load of the drive circuit unit 25 is reduced, so that the collector potential of the switching unit 27 rises. Utilizing this property, the high frequency drive unit is controlled by detecting the voltage rise.

In FIG. 9, the microcomputer 23 processes voltage information at the A / D conversion port, and divides the potential Vcc of the switching section 27 by the resistors R8 and R7 to read it. The microcomputer 23 uses the A-D conversion port for 8
Bit digital signal output setting unit 24 (DA converter)
To the drive circuit section 25. Switching unit 2
The potential Vcc of 7 is synchronized with the voltage signal obtained by the microcomputer 23 by the synchronizing circuit / high frequency oscillating circuit, the frequency is arbitrarily changed, and the high frequency driving unit is controlled.

In the first embodiment described above, when the auxiliary heating member 8 is placed on the main body 1, the auxiliary heating member 8 is placed so as to hide the dotted line 4a on the insulating plate 4 so that the power transmission coil and the power receiving coil are received. Although it corresponds to the coil accurately,
For example, as shown in FIG. 10, a protrusion 4b is provided on the insulating plate 4 to such an extent that the case 10 of the power receiving coil can be housed therein, and the case 10 is placed inside the protrusion 4b. May be. Further, a space enough to accommodate the case 10 may be formed by a protrusion (box shape) or a recess, and the case 10 may be placed in the protrusion or the recess, and the auxiliary heating member 8 may be placed on the main body 1. 2 and 10
It is not limited to.

Example 2. FIG. 11 is a circuit diagram showing the second embodiment, which is a system for precisely controlling the temperature in the cooking chamber by detecting the temperature by the electronic circuit on the auxiliary heating member side. In the figure, 2a is a heating coil, 2b is a power transmission coil, 4 is an insulating plate, 5 is a high frequency drive circuit section, 9 is a power receiving coil, 11 is a heater section, 12 is a resistance wire, 17 is a thermostat, and 32 is a circuit. It is a contact that is opened and closed by the internal relay 40. The electronic circuit of the auxiliary heating member is arranged on, for example, a substrate provided between the power receiving coil and the heating means, and the contact 32 is interrupted by the relay 40 in the electronic circuit to control the temperature. The high frequency voltage induced in the power receiving coil 9 is converted into a direct current by the rectifier 33 and smoothed by the capacitor 34. Then, a constant voltage of 15 V or the like is obtained by the integrated circuit 35 for the constant voltage power source, smoothing is secured by the capacitor 36, and the electronic circuit drive power source is obtained. Reference numeral 37 denotes an integrated circuit (voltage comparator) for voltage comparison, and in the relation of the input voltage, V- (inverting input)> V +
If (non-inverting input), the output is low (L). The thermistor 38, which is a temperature detecting element, has a very high resistance while the temperature is low, and the potential (V−) of the resistor R3 starts in a state close to zero. The potential (V +), which is the voltage division between the resistors R1 and R2, is set to a predetermined potential, and at the time of start, there is a relation of V +> V-, and the output in that case is high (H). Therefore, since the bias current is supplied to the base of the transistor 39 via the resistor R4, the transistor 39 becomes conductive. Then, since the relay 40 operates, the contact 32 is closed, and as a result, the heater unit 1
1 is energized to start heating. Further, as the temperature of the cooking chamber rises, the resistance value of the thermistor 38 decreases, so that the potential (V−) of the resistor R3 rises and V−> V + is established. ). Therefore,
The base of transistor 39 is blocked and transistor 3
9 becomes non-conducting and the relay 40 is disconnected. As a result, the contact 32 is opened and the power supply to the heater unit 11 is stopped. Since the resistor R5 is connected to the row (L) of the integrated circuit 37, it is connected in parallel to the resistor R2, and the potential (V +) is lowered due to the inverted output, so that the output row (L) is stably held. Chattering of relay contacts is prevented. The voltage of the resistor R2 drops when the heater is cut off,
When the temperature drops to some extent, the relationship of V +> V- is restored again, the output becomes high (H), the relay 40 operates again, and the heater 11 is energized. Reference numerals 41 and 42 are reverse current blocking diodes provided to ensure these operations. Four
Reference numeral 3 is a diode that acts to absorb a surge voltage generated when the relay 40 is blocked. In this way, the temperature inside the auxiliary heating member is controlled to be maintained at a predetermined temperature.

Example 3. FIG. 12 is a circuit diagram showing the third embodiment, which is a system for precisely controlling the temperature of the cooking chamber by setting the heater potential of the auxiliary heating member to a certain voltage or less. In the figure, parts that are the same as or correspond to those in FIG. 11 are assigned the same reference numerals, and descriptions thereof will be omitted. Similar to the second embodiment, the contact 32 is interrupted by the relay 40 in the electronic circuit to control the temperature. When the operation unit starts the operation, the coils 2a and 2b are energized. Therefore, for example, when the contact 32 of the circuit on the auxiliary heating member side is broken by the relay 40, the high frequency drive circuit provided on the main body side. The voltage of the switching unit of the unit 5 is detected to control the oscillation frequency, and the operation is continued at the frequency to be driven. The high frequency voltage induced in the power receiving coil 9 is converted into a direct current by the rectifier 33 and smoothed by the capacitor 34. Then, a constant voltage of 15 V or the like is obtained by the IC 35 for the low voltage power source, smoothing is secured by the capacitor 36, and the electronic circuit driving power source is obtained. Similar to the third embodiment, the voltage comparator 37 outputs low (L) if the input voltage is V− (inverted input)> V + (non-inverted input). The potential (V−) of the resistor R3 is obtained by dividing the rectified voltage with the resistor R6 and is proportional to the power source voltage obtained by rectifying the induced voltage of the auxiliary heating member. The high frequency drive control unit of the main body first starts with a small amount of power and gradually increases the power. Therefore, V− gradually increases from zero V. V + is set to a predetermined potential (a voltage value such that the induced voltage is 30 V AC or less) by the voltage division of resistors R1 and R2, and at the time of start V +> V-, and its output is high (H). Is. Therefore, the transistor 39
A bias current is supplied to the base of the transistor through the resistor R4, and the transistor 39 becomes conductive. The relay 40 operates by the conduction of the base, and the contact 32 is closed. As a result, the heater is energized to start heating.

As the voltage of the power receiving coil 9 rises, the resistance R
The potential (V−) of 3 rises, and the relation of V−> V + is established, and the output is inverted and becomes low (L). And the transistor 39
The base of the relay is blocked so that it becomes non-conductive and the relay 40 is disconnected. As a result, the contact 32 is opened and the heater portion 11 is opened.
Energization stops. At this time, it is detected that the heater portion 11 of the auxiliary heating member is opened, the high frequency impedance seen from the coil 2 becomes high, and the collector voltage of the switching element of the drive circuit rises. Then, since it is possible to know the limit of the electric power that has been gradually increased, the microcomputer in the control unit re-elevates to the electric power immediately before the relay 40 is cut off, so that the operation is continued. In this way, the potential induced in the auxiliary heating member can be controlled to a predetermined value.

Example 4. FIG. 13 is a circuit diagram of the auxiliary heating member side of Example 4, and FIG. 14 is a circuit diagram of the main body side. The same or corresponding parts as those in FIGS. 9 and 11 are designated by the same reference numerals, and the description thereof will be omitted. An example in which the coil 2 is short-circuited at the relay contact is shown. When a certain temperature is reached and the contact 32 of the relay 40 is opened as in the second and third embodiments, the collector potential of the transistor rises as described above. In this case, the potential divided by the resistors R8 and R7 at the port in FIG. 14 is read by the analog-digital conversion port of the microcomputer, and a high (H) signal is issued from the output port to operate the relay, and the transistor is connected via the resistor. To turn on the relay 40b to activate the contact 32b.
Close. At the same time, a code for lowering the D-A conversion voltage is emitted from the port to raise the oscillation frequency to 800 W, which is necessary to heat the container, and to lower the coil 2b at the contact 32b.
Is short-circuited and only the heating coil 2a is energized.

Example 5. FIG. 15 is a sectional view of the fifth embodiment,
FIG. 16 is an exploded perspective view of the auxiliary heating member, in which the power receiving coil is arranged on the outer peripheral portion of the outer frame of the auxiliary heating member.
In the figure, those parts which are the same as or correspond to those in FIG. 1 are designated by the same reference numerals, and a description thereof will be omitted. 50 is a cover of the coil lead wire, 51
Is a hole provided in the outer frame 13, and 17a is a substrate having, for example, an electronic circuit for temperature control on the auxiliary heating member side shown in Examples 2 to 4 above. The outer frame 13 is made of, for example, heat-resistant resin, and the power receiving coil 9 is wound around the outer peripheral portion. The lead wire from the power receiving coil 9 has a hole 51.
And is connected to the heater section 11 through. As shown in FIG. 16, the coil cover 50 is fitted and coupled to the outer frame 13 and the case 10 of the power receiving coil 9.

According to the fifth embodiment, since the outer peripheral portion of the outer frame becomes a part of the winding structure of the power receiving coil, the structure of the device can be simplified and an inexpensive device can be obtained. .

Example 6. Example 6 is an example relating to the structure of the auxiliary heating member. FIG. 17 is a partially exploded block diagram, FIG.
8 is a perspective view in which a part of the case of the power receiving coil of the auxiliary heating member is cut away. In the figure, those parts which are the same as or correspond to those in FIG. 2 are designated by the same reference numerals, and a description thereof will be omitted. Thirteen
Is an outer frame of the auxiliary heating member and is made of a thin metal (iron plate) or the like. Reference numeral 52 is a cut portion provided in the outer frame 13, 53 is an insulating structure made of, for example, a heat-resistant resin or the like configured to completely close the cut portion 52, and FIG.
The state which attached the insulating structure 53 to the notch 52 is shown.
When the outer frame 13 is made of metal, the outer frame 13 corresponds to one coil like the power receiving coil 9, and therefore the induced voltage of the power receiving coil is reduced and the outer frame 13 itself is heated strongly. . Y shown in FIG. 16 indicates the direction of the high-frequency current generated when the notch 52 is closed by the insulating structure 53 and a heating operation is performed.

When the outer frame of the auxiliary heating member is composed of a continuous metal wall, the outer frame 13 corresponds to a coil of one turn like the power receiving coil 9. Therefore, when a part of the metal wall is cut out, It becomes a short-circuit coil of one winding, and the induced voltage of the power receiving coil (10 turns) cannot be obtained. Therefore, if the continuous metal wall is arranged at a position sufficiently separated from the power transmission coil, the influence of the short circuit will be eliminated. This is because the degree of coupling between the power transmission coil and the power reception coil decreases in inverse proportion to the square of the distance between them, but it is more accurate to bring the power reception coil closer to the power transmission coil. In the embodiment, the distance is about 5 mm above the coil. Since the outer frame of the auxiliary heating member is made of metal, the device is robust and inexpensive.

Example 7. 19a is a sectional view showing the seventh embodiment, and FIG. 19b is a partially enlarged view of FIG. 19a, in which the outer frame of the auxiliary heating member is made of heat resistant plastic or heat resistant glass which is a nonmetal. In the figure, those parts which are the same as or correspond to those in FIG. 1 are designated by the same reference numerals, and a description thereof will be omitted. Reference numeral 10a denotes a bottom surface portion and a side surface portion of the case, and 10b denotes an upper surface portion. The case 10 of the power receiving coil is fixed to the outer peripheral portion of the outer frame 13 by an adhesive 54 or the like as shown in FIG. 19b.

Since the non-metal part of the outer frame does not induce an induced current, it is not heated at all and has excellent heat insulating properties, so that an efficient device can be provided. In particular, when the outer frame is made of glass, the heating condition of the cooked food can be observed well.

Example 8. FIG. 20 is a cross-sectional view showing the auxiliary heating member of Example 8. The lower part of the outer frame of the auxiliary heating member is made of heat resistant plastic or heat resistant glass which is a non-metal member, and the upper part is made of metal. In the figure, those parts which are the same as or correspond to those in FIG. 1 are designated by the same reference numerals, and a description thereof will be omitted. 1
Reference numeral 3a denotes a lower portion of the outer frame, which is made of heat-resistant plastic or heat-resistant glass which is a non-metal member, and 13b denotes an upper portion of the outer frame, which is made of metal. Reference numeral 55 denotes an opening provided in the ceiling of the outer frame, which functions as a steam vent when the toast is heated, for example.

Since the non-metal in the lower part of the outer frame does not induce an induced current and the metal material in the upper part can obtain sufficient heat resistance and workability, the metal material and the non-metal material can be used especially when the ceiling part becomes hot. It is possible to obtain a highly reliable device by optimally designing the materials used.

Further, as shown in the figure, when an opening is provided in the outer frame, steam, smoke, and odor generated from the cooked food are discharged, so that steam is contained inside and dew condensation occurs inside the outer frame of the auxiliary heating member. There is no. Especially when baking toast
Prevents steam from sticking toast.

Example 9. FIG. 21 is a partially exploded cross-sectional view of Embodiment 9, and FIG. 22 is a perspective view of the auxiliary heating member, in which a switch for turning on / off the electricity to the heater portion is provided in the auxiliary heating member outer frame. In the figure, those parts which are the same as or correspond to those in FIG. 1 are designated by the same reference numerals, and a description thereof will be omitted. 56 is a switch for turning on and off the power supply to the heater unit 12,
For example, when the knob portion is down, energization is on, and when it is up, energization is off.

FIG. 23 is an electric circuit diagram on the auxiliary heating member side. The switch 56 is used according to the purpose,
When the switch 56 is opened, the heater is de-energized and heating is stopped.

Example 10. FIG. 24 is a sectional view of the tenth embodiment. In the figure, the same or corresponding parts as in FIG. In this embodiment, the steam plate 57 having the holes 57a is arranged in the container 3,
The container is filled with water 58 for heating. In this case, the switch 56 may be opened and used, and since the electromagnetic induction device of the tenth embodiment can heat water to generate steam, it is convenient to use, for example, when cooking sardines or the like. Therefore, the usage of the device is expanded.

Further, since the heater portion is provided on the ceiling of the auxiliary heating member and the temperature inside the auxiliary heating member is appropriately raised,
The vapor of the heated water prevents the vapor from being condensed on the inner wall of the auxiliary heating member.

Example 11. FIG. 25 is a sectional view of the eleventh embodiment, and FIG. 26 is an exploded view. In the figure, the same or corresponding parts as in FIG. Reference numeral 57 denotes a steam plate, which is provided with an extending portion 57b extended to the outside of the steam plate 57. As shown in the figure, the case 10 portion of the power receiving coil 9 is placed on the extending portion 57b of the steam plate 57 placed in the container 3,
The power receiving coil can be separated from the power transmitting coil. By such placement, the coupling rate of the coils decreases, so the induced voltage of the power receiving coil decreases, and the heater 11 is not heated too strongly. For this reason, the heater portion 11 becomes warm.

Example 12 27 is a sectional view of the twelfth embodiment, and FIG. 28 is a perspective view showing the auxiliary heating member of FIG. In the figure, those parts which are the same as or correspond to those in FIG. 1 are designated by the same reference numerals, and a description thereof will be omitted. The outer frame 13 of the auxiliary heating member is divided into an outer cylindrical outer wall 13a and an inner cylindrical outer wall 13b,
They are arranged overlapping each other. Reference numeral 59 denotes an inclined slit provided on the outer cylindrical outer wall 13a.
As shown in FIG. 8, they are connected by a caulking member 60 provided on the inner cylindrical outer wall 13b. Therefore, the outer cylindrical outer wall 13a and the inner cylindrical outer wall 1 are rotated by rotating each other.
3b can move up and down while rotating. For example, when baking a cake having a height, the heater unit 11 is moved upward, and when baking a cake having a low height such as toast, the heater unit 11 is moved downward. In other words, the desired degree of baking can be freely obtained according to the size of the food.

Example 13 29 is a sectional view showing the thirteenth embodiment, FIG. 30 is a partial configuration diagram of the outer frame ceiling portion, FIG. 31 is a configuration diagram of bolts and nuts provided on the outer frame ceiling portion, and FIG. 32 is a state in which the heater portion is lowered. FIG. In the figure, those parts which are the same as or correspond to those in FIG. 1 are designated by the same reference numerals, and a description thereof will be omitted.
Reference numeral 61 is a support, and the heater 11 part is fixed to the support 61. Reference numeral 62 denotes a gimbal spring having one end fixed to the ceiling portion 13c of the outer frame 13 and the other end fixed to the support body 61. In the present embodiment, the heater portion 1 is composed of four gimbal springs.
1 has a structure in which the auxiliary heating member is suspended from the outer frame ceiling. Reference numeral 63 is a bolt having a male screw, 64 is a nut having a female screw, and the bolt 63 is fixed to the support 61 so as to penetrate the penetrating portion 13d provided in the ceiling portion 13c. A nut having a female screw is rotatably fixed to the penetrating portion 13d. With such a configuration, as shown in FIG. 32, the heater portion is vertically moved by rotating the nut (female screw).

Example 14 33 is a cross-sectional view showing a fourteenth embodiment. In the figure, the same or corresponding parts as those in FIG. 1 are designated by the same reference numerals and the description thereof will be omitted. Reference numeral 65 denotes a cylindrical wall, which is provided between the container 3 and the outer frame 13 and is detachably arranged in the auxiliary heating member or on the insulating plate 4. Further, the container 3 side of the cylindrical wall 65 is coated with Teflon coating or heat resistant deodorant coating. Reference numeral 66 denotes a filter portion provided on the ceiling portion of the outer frame, and smoke generated from the cooked food passes through the catalyst filter 67 and is discharged through an opening 68 provided on the ceiling. Even if the cylindrical wall 65 is not provided, the same effect can be obtained by applying the above-mentioned coating or the like to the cooking chamber side of the outer frame 13.

The cylindrical wall prevents the inside of the auxiliary heating member from being soiled due to cooking, and the cylindrical wall is detachable.
It can be easily cleaned. In addition, since the catalytic filter oxidizes and decomposes steam, smoke, and odor generated from cooked food, even when cooking with a lot of smoke and odor, for example, when saury is baked, it can be realized without a ventilation fan. Further, since the Teflon coating prevents dirt from sticking out from the cooked food, the cleaning property for cleaning up after cleaning is improved. In addition, the heat-resistant deodorant coating oxidizes and decomposes the steam, smoke, and odor generated from the cooked product, so the generation of steam, smoke, and odor can be reduced.

Example 15 Example 15 relates to the structure of the heater part, and FIG. 34 is a partial structural view of the heater part. Reference numeral 11 denotes a heater portion provided on the top of the outer frame of the auxiliary heating member. The resistance wire 12 is wound around the mica plate 69, and the resistance wire 12 on the side not facing the food is the mica plate 6.
The heat is radiated through the opening 70 provided in 9. Therefore, efficient heating can be realized with limited power supply energy. Further, as the resistance wire 12, for example, a ribbon wire is used so as to prevent an unpleasant parasitic vibration sound due to high-frequency energization. In detail, when energized at a high frequency of about 25 KHz, the resistance wire also vibrates at this frequency. But 2
5 KHz is not an audible frequency, and its ½ to ¼ frequency component is audible and annoying. Therefore, when the ribbon wire is used, the cross-sectional area is larger than that of the round wire, which makes it difficult to vibrate.

Example 16. FIG. 35 is a sectional view of the sixteenth embodiment, and FIG. 36 is a partially exploded configuration diagram. In the figure, the same or corresponding parts as in FIG.
18b is a handle, for example, in FIG.
It is formed integrally with the lead wire cover 50.
In the above, it is integrally formed with the insulating structure 53 of the sixth embodiment. Each is a handle when carrying the auxiliary heating member. Since the number of components is reduced by the integral formation, an inexpensive device can be provided.

Example 17 37 is a perspective view showing Example 17, FIG. 38 is a cross-sectional view, FIG. 39 is an exploded view of the outer heating member outer frame ceiling portion, and FIG. 40 is a main-part configuration diagram of FIG. 39. In the figure, those parts which are the same as or correspond to those in FIG. 1 are designated by the same reference numerals, and a description thereof will be omitted. Reference numeral 70 denotes a support member that doubles as a heater unit attachment and a heater unit protection grid.
-It has a cut-and-raised part 70b and a cut-and-raised part 70c. The wiring from the power receiving coil to the heater portion is shown by the dotted line in FIG.
The temperature of the outer frame 13 of the auxiliary heating member becomes higher toward the upper part and the material of the handle is limited. However, if it is arranged at the lower part, the material may be a general material such as an inexpensive polypropylene resin. In addition, a part of the outer frame 13 may be formed of glass or the like,
An opening may be provided in a part of the outer frame.

Next, the structure for attaching the heater portion to the outer frame will be described with reference to FIGS. 39 and 40. Bending part 7
0a is fixed to the outer frame by hooking or screwing,
The cut-and-raised portion 70b penetrates the hole portion 11a of the beater portion, and the tip portion is twisted and bent to fix the heater portion 11 to the support body 70. The cut-and-raised portion 70c serves as a protective grid for the heater portion. Since the support body 70 serves both as a heater mounting structure and a heater protection grid, the support body 70 is light in weight and the auxiliary heating member can be easily carried.

Example 18. 41 is a configuration diagram showing the eighteenth embodiment, and FIG. 42 is an enlarged view of a main part. In the figure, the same or corresponding parts as in FIG. 7
Reference numeral 1 denotes a hinge portion, and the auxiliary heating member 8 is rotatably provided on the main body 1 by a hinge portion 71. Then, the food can be taken in and out of the cooking chamber by opening and closing the auxiliary heating member 8.

Since the hinged auxiliary heating member can be rotated about the hinge of the main body, the cooking chamber can be completely opened when the food is taken in and out, and the container can be easily taken in and out.

Example 19 43 is a sectional view showing the nineteenth embodiment, and FIG. 44 is a perspective view of the main body 1. In the figure, those parts which are the same as or correspond to those in FIG. 1 are designated by the same reference numerals, and a description thereof will be omitted. Reference numeral 72 denotes a concave holder provided in the main body 1, which is attached to the main body by pointing one side of the handle 18c of the auxiliary heating member 8.

The shape holder supports the convex portion of the auxiliary heating member, so that the auxiliary heating member can be temporarily mounted without taking a complicated structure such as a hinge portion.

Example 20. 45 is a configuration diagram showing a twentieth embodiment, FIG. 46 is an enlarged view of a main part, and FIG. 47 is a circuit diagram of a main part of a power receiving coil and a heater part. In FIG. The reference numerals are given and the description is omitted. Reference numeral 73 is a hinge portion provided between the case 10 of the power receiving coil and the outer frame 13 of the auxiliary heating member, and 8a and 8b are the auxiliary heating members divided into approximately half at the upper part of the case.
a rotates and opens / closes around the hinge portion 73a. 12a ・ 1
Reference numeral 2b denotes a resistance wire of the heater portion, and the wiring from the power receiving coil to the heater portion is connected to the heater portion through the inside of the hinge portions 73a and 73b.

The auxiliary heating member is connected to the hinge portion from the main body,
It may be configured to be removed together with the case. In this case,
Improves usability when used by itself.

Since one side of the auxiliary heating member is opened by rotating the hinge part of the coil case, it is compact and stable.

Example 21. 48 is a configuration diagram showing a twenty-first embodiment. In the figure, the same or corresponding parts as those in FIG. 1 are designated by the same reference numerals and the description thereof will be omitted. 8a and 8b are auxiliary heating members divided into approximately half at the upper part of the case. The auxiliary heating members 8a and 8b are hinge portions 73a and 73b, respectively.
It is one that completely opens both sides around.

Since each part of the auxiliary heating member can be rotated around the hinge of the coil case, it is compact and stable even when fully opened when opened.

Example 22. FIG. 49 is a configuration diagram showing a twenty-second embodiment, and FIG. 50 is an enlarged view of a main part of a heater part. In the figure, those parts which are the same as or correspond to those in FIG. 1 are designated by the same reference numerals, and a description thereof will be omitted. Reference numeral 1 is a main body, 2a is a heating coil, 2b is a power transmission coil, and auxiliary heating members 8a and 8b are rotatably provided by hinge portions 74 which are rotation means provided on the outer frame ceiling of the auxiliary heating members. Has been. As shown in FIG. 49, the auxiliary heating member 8b is rotatably provided with respect to the auxiliary heating member 8a. 11a and 11b are auxiliary heating members 8
The heater portion is provided at a and 8b, and FIG. 50 shows the structure of the main portion thereof. One side of the auxiliary heating member has a structure that can be rotated and moved upward around the hinge portion.

Example 23. 51 is a sectional view showing Embodiment 23, FIG. 52 is a perspective view, FIG. 53 is an exploded view, FIG. 54 is an exploded view of a main part, and FIG. 55 is an exploded view of FIG. In the figure,
Reference numeral 1 is a main body of the electromagnetic induction heating device, 2a is a heating coil which is an inductive coil provided on the bottom of the main body, and 2b is a power transmitting coil which is an inductive coil provided on a side wall of the main body. Has been. Reference numeral 3 is a container for containing the cooked food 16 and the like, 4 is an insulating plate, 5 is a high frequency drive circuit section, 6 is a control section, 7 is an operation section, and the control section 6 receives an input command from the operation section 7 and drives it at a high frequency. It is configured to output to the circuit unit 5. The operation unit 7 has the configuration shown in FIG. 5, for example, as in the first embodiment. Reference numeral 8 is an auxiliary heating member of the electromagnetic induction heating device, 9 is a power receiving coil which is an auxiliary induction coil, 10 is a case of the power receiving coil, and 11 is a heater portion having a resistance wire 12. The power receiving coil 9 is the power transmitting coil 2
b is provided so as to face the auxiliary heating member 8 on the main body 1.
In order to receive the energy from the power transmission coil 2b sufficiently, for example, it is provided right next to the power transmission coil 2b as shown in FIG. 75 is a lid body made of, for example, glass placed on the upper portion of the main body 1, 76 is a handle, 7
7 is an outer frame of the auxiliary heating member, and 78 is a support. Fig. 53
As shown in FIG. 3, a spring body 79 bent inward is fixed to a substantially central portion of the outer frame 77 supporting the heater portion 11. A coupling 80 is provided on the handle 76 of the lid 75, and the lid 75 is fastened together with the handle 76 with a screw 81. The coupling 80 is fitted into the inside of the spring body 79 to be united. Further, the lid body 75 can be placed so as to fit completely into the upper edge portion of the outer frame 1a of the main body 1. Further, the outer frame 77 of the auxiliary heating member is provided with an opening 77b, and the cooked food can be observed through this opening 77b. Further, steam or the like generated from the cooked food passes through the opening 77b. Since the cooked food can be observed through the opening 77b, the outer frame 77 of the auxiliary heating member does not need to be heat-resistant glass which is expensive in terms of material, and a peep window can be formed while ensuring the transparency of the lid.

Further, when water vapor or the like from the cooked food is discharged to the outside of the apparatus, for example, as shown in FIG. 53 and FIG. Water vapor or the like is discharged from the stepped portion 82 when the lid is placed. Since the lid 75 is warmed by the heater portion of the auxiliary heating member, vapor does not condense and the permeability can be secured.

Next, the mounting structure of the heater portion and the lid will be described. First, the engaging portion 78a of the support portion 78 is inserted into the opening 11a of the heater portion, the engaging portion 78b is inserted into the opening 77a of the outer frame 77, and the tip of each engaging portion is bent, so that the heater portion 11 is It is attached to the outer frame 77. Further, the outer frame 77 engages with the lid body when the spring body 79 fits the coupling 80. Since the coupling 80 is fastened to the lid 75 together with the handle 76 with the screw 81, the auxiliary heating member 8 can be removed together with the lid by lifting the lid.

In the figure, the coil is the heating coil 2a.
They are separately arranged like the power transmission coils 2b, and are connected in series as shown in FIG. 3, for example, as in the first embodiment. The container 3 placed directly above the heating coil 2a via the insulating plate 4 is heated by the principle of electromagnetic induction heating when the high frequency current generated by the high frequency drive unit 5 is applied. The control unit 6 is a unit that determines the drive output in response to an input command from the operation unit 7 and executes heating, and includes a high-frequency transmission collection frequency, a synchronizing circuit, and the like. The power transmission coil 2b is arranged at a position facing the power reception coil 9 provided on the auxiliary heating member 8 in several turns. The power receiving coil 9 is the coil 2a, 2b
It is driven by a high-frequency voltage that is induced by combining with a high-frequency current leading to the. The voltage induced in the power receiving coil 9 is energized to the heater portion 11 which is a load to continue heating. The cooked food 16 is heated for a preset cooking time by, for example, operating a cooking start switch provided in the operation unit. Since the container 3 is heated in the region of the heating coil 2a, the lower surface of the food to be cooked is heated, and the upper surface is heated by the heater portion of the auxiliary heating member, so that the food to be cooked is heated on both sides.

According to this embodiment, the power receiving coil which is the auxiliary heating member and the portion constituting the heater portion can be freely attached to and detached from the lid portion. Therefore, the lid body can be used together with a conventionally used lid made of glass or the like. It can be used for both purposes and leads to improved storage. Also,
Since the power receiving coil facing the power feeding coil is provided above the main body frame arranged so as to surround the outer circumference of the container of the auxiliary heating member to be heated, the auxiliary heating member can be formed to have a small dimension in the height direction. The storability of members is improved.

Example 24. FIG. 57 is a cross-sectional view of the twenty-fourth embodiment, which is an embodiment of the case where the heater portion provided on the lid body is removed and used. 51, those parts which are the same as or correspond to those in FIG. 51 are designated by the same reference numerals, and a description thereof will be omitted. Reference numeral 83 denotes a container, which has a structure in which the lid 75 is placed on the outer edge portion 83 a of the container 83. The container 83 is heated to heat the cooked product 18. Since the auxiliary heating member is removed from the portion of the coupling 80 from the lid, it may be controlled so that the power transmission coil 2b is not energized.

Example 25. FIG. 58 is a sectional view of the twenty-fifth embodiment, and FIG. 59 is a sectional view of essential parts. In this embodiment, the induction coil provided in the main body is provided below the insulating plate 4. 51, those parts which are the same as or correspond to those in FIG. 51 are designated by the same reference numerals, and a description thereof will be omitted. Reference numeral 9 is a power receiving coil that is an auxiliary induction coil, and is placed above the induction coil 2 so as to be induced by the induction coil.

Example 26. FIG. 60 is a sectional view of the twenty-sixth embodiment, in which the main body frame above the insulating plate 4 can be removed from the main body. 51, those parts which are the same as or correspond to those in FIG. 51 are designated by the same reference numerals, and a description thereof will be omitted. Reference numeral 84 denotes a main body frame, which is detachably mounted on the main body so as to surround the container. The power receiving coil 9 is arranged on the insulating plate 4 and is fed by the power transmitting coil 2b. The power receiving coil 9 is housed in the coil case 10 and is located in the auxiliary heating member outer frame case. Similar to the above embodiment, it may be used together with the lid, or as shown in FIG.
The main body frame 84 may be arranged on the main body so that only the main body side coil 2 is used. The container 83 in FIG. 61 is lower than the main body frame 84. If the main body frame is removed from the main body, the mounting area of the container is expanded, so that various other containers can be used.

[0090]

As described above, according to the present invention, the cooked food is not only cooked through the container that is induction-heated by the first induction coil provided in the main body, but is also heated by the auxiliary heating member. Since the food is cooked by the means, the food can be heated from a plurality of directions, and the cooking time can be shortened. Further, heating in a plurality of directions is possible, and various cooking methods can be realized.

Further, since the auxiliary heating member is detachably provided on the main body, it can be easily removed when the auxiliary heating member is unnecessary, and a plurality of cooking methods can be supported.

Further, since the heating means is connected in series with the third induction coil via the switching temperature element, the temperature switching element can cut off the power supply from the third induction coil, and the heating means causes abnormal heating. To prevent

Further, since the auxiliary heating member rectifies the induced voltage of the third induction coil into a direct current and operates the temperature adjusting circuit by this direct current, it is possible to perform precise temperature control corresponding to the induced voltage and to ensure safety. The reliability and reliability are improved.

Further, since the lid is rotatably provided on the main body, it is not necessary to remove the entire lid from the main body when taking out a food or the like from the cooking chamber. Therefore, a large space for placing the lid is provided. Improves usability without need.

Since the lid is divided into two parts and one of the divided lids is rotatably provided on the main body, it is possible to take out the cooked food or the like from the cooking chamber without removing the entire lid.
Not only is the space for placing the entire lid unnecessary, but the opening of the cooking chamber prevents the cooking chamber or food from cooling.

Further, since the lid is divided into two parts, and one of the divided lids is provided on the other lid by the rotating means, only the cooking chamber of the necessary part can be opened, and the lid can be opened. Not only is the space for placing the body unnecessary, but the opening / closing operation of the lid is facilitated.

Furthermore, since the container housing portion is formed by the bottom portion and the side wall portion provided on the main body, the structure of the lid body placed on the upper surface of the main body can be facilitated and the weight of the lid body can be reduced.
Operability when removing the lid is improved.

Further, since the heating means is detachably provided on the lid body, it can be easily removed from the lid body when the heating means is unnecessary, and various cooking methods can be realized.

Further, a part of the induction coil provided in the main body can be used as a heat source of the heating means, and the induced voltage of the induction coil can be used also as another heating means, whereby the energy generated by the induction coil can be effectively used. .

Further, since the main body frame surrounding the cooking container can be removed, it is possible to cook only by induction heating by the main induction coil provided in the main body, and for example, the number of types of containers that can be placed on the upper surface of the main body increases The utilization of the device is improved.

[Brief description of drawings]

FIG. 1 is a sectional view showing a first embodiment of the present invention.

FIG. 2 is an exploded perspective view showing the first embodiment.

FIG. 3 is a circuit diagram showing a first embodiment.

FIG. 4 is a configuration diagram of a coil showing the first embodiment.

FIG. 5 is a configuration diagram of an operation unit according to the first embodiment.

FIG. 6 is an exploded configuration diagram of a heater unit and a heater support unit according to the first embodiment.

FIG. 7 is a partial cross-sectional view of the ceiling portion of the auxiliary heating member according to the first embodiment.

FIG. 8 is a control block diagram showing the first embodiment.

FIG. 9 is a control circuit diagram showing the first embodiment.

FIG. 10 is a perspective view showing another configuration of the insulating plate.

FIG. 11 is a circuit diagram on the auxiliary heating member side showing Example 2;

FIG. 12 is a circuit diagram on the auxiliary heating member side showing Example 3;

FIG. 13 is a circuit diagram on the auxiliary heating member side showing Example 4;

FIG. 14 is a circuit diagram of the main body side showing Embodiment 4;

FIG. 15 is a cross-sectional view showing a fifth embodiment.

FIG. 16 is a partial exploded view of the auxiliary heating member according to the fifth embodiment.

FIG. 17 is a partially exploded view of the auxiliary heating member according to the sixth embodiment.

FIG. 18 is a perspective view of an auxiliary heating member showing a sixth embodiment.

FIG. 19 is a sectional view showing Example 7.

FIG. 20 is a sectional view of an auxiliary heating member showing an eighth embodiment.

FIG. 21 is an exploded view showing Example 9.

FIG. 22 is a perspective view of an auxiliary heating member according to a ninth embodiment.

FIG. 23 is an electric circuit diagram on the auxiliary heating member side showing Example 9.

FIG. 24 is a sectional view showing Example 10.

FIG. 25 is a cross-sectional view showing Example 11.

FIG. 26 is an exploded view showing Example 11.

FIG. 27 is a cross-sectional view showing Example 12.

FIG. 28 is a perspective view of an auxiliary heating member according to a twelfth embodiment.

FIG. 29 is a cross-sectional view showing Example 13.

FIG. 30 is a partial configuration diagram of a ceiling portion of an auxiliary heating member according to a thirteenth embodiment.

FIG. 31 is a configuration diagram of a bolt and a nut according to a thirteenth embodiment.

FIG. 32 is a diagram showing a state where the heater unit according to the thirteenth embodiment is lowered.

FIG. 33 is a cross-sectional view showing Example 14.

FIG. 34 is a configuration diagram of a heater unit according to a fifteenth embodiment.

FIG. 35 is a cross-sectional view showing Example 16.

FIG. 36 is a partially exploded configuration diagram of the auxiliary heating member according to the sixteenth embodiment.

37 is a perspective view showing Example 17. FIG.

38 is a cross-sectional view showing Example 17. FIG.

FIG. 39 is an exploded view of the ceiling portion of the auxiliary heating member according to the seventeenth embodiment.

FIG. 40 is an enlarged view of a main part of FIG. 39, showing the seventeenth embodiment.

FIG. 41 is a configuration diagram showing an eighteenth embodiment.

FIG. 42 is an enlarged view of a main part showing the eighteenth embodiment.

FIG. 43 is a cross-sectional view showing Example 19.

FIG. 44 is a perspective view of the main body showing Example 19;

FIG. 45 is a configuration diagram showing an twentieth embodiment.

FIG. 46 is an enlarged view of a main part showing the twentieth embodiment.

FIG. 47 is a circuit diagram of main parts of a power receiving coil and a heater part according to a twentieth embodiment.

FIG. 48 is a configuration diagram showing an example 21.

FIG. 49 is a configuration diagram showing an example 22.

FIG. 50 is an enlarged view of a main part of a heater section showing Embodiment 22.

51 is a sectional view showing Example 23. FIG.

52 is a perspective view showing Example 23. FIG.

53 is an exploded view showing Example 23. FIG.

FIG. 54 is an exploded view of the auxiliary heating member according to the twenty-third embodiment.

FIG. 55 is an exploded sectional view showing Example 23.

FIG. 56 is a diagram showing a main part of a main body provided with a step portion.

FIG. 57 is a sectional view showing Example 24.

FIG. 58 is a sectional view showing Example 25.

FIG. 59 is a main-portion cross-sectional view showing Embodiment 25;

FIG. 60 is a sectional view showing Example 26.

FIG. 61 is a sectional view showing Example 26.

FIG. 62 is a diagram showing a conventional electromagnetic induction heating device.

FIG. 63 is a diagram showing a conventional electromagnetic induction heating device.

FIG. 64 shows a circuit block diagram of FIG. 63.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body 2 Induction coil on main body side 2a Heating coil 2b Power transmission coil 3 Container 8 Auxiliary heating member 9 Power receiving coil 11 Heater section 16 Cooked food 17 Thermostat 17a Temperature control circuit 71 Hinge section 73 Hinge section 74 Hinge section 75 Lid body 84 body frame

Front page continued (72) Inventor Kazuhiro Fukuda 1728 Omaeda 1 Omaeda, Hanazono-cho, Saitama-ken 1 Mitsubishi Electric Home Equipment Co., Ltd. Equipment Co., Ltd.

Claims (11)

[Claims] 1. A main body having a first induction coil for inductively heating a container accommodating food to be cooked, and a second induction coil provided outside the first induction coil, and the second induction coil. Auxiliary heating having a third induction coil that is provided opposite to and that is electromagnetically coupled to this coil, and a heating unit that generates heat based on the induced voltage of the third induction coil and heats the cooked food. An electromagnetic induction heating device comprising: a member. 2. A main body having a first induction coil for inductively heating a container for containing food to be cooked, and a second induction coil provided outside the first induction coil, and detachably attached to the main body. A lid that is placed and forms a cooking chamber with the main body, and a third lid that is provided on the lid and that is electromagnetically coupled to the second induction coil when the lid is placed on the main body.
And an auxiliary heating member having heating means for heating the food by heating the induction coil according to the induced voltage of the third induction coil. 3. The electromagnetic induction heating device according to claim 1, wherein the heating means is connected in series with the third induction coil via a temperature switching element. 4. The electromagnetic heating device according to claim 1, wherein the auxiliary heating member includes a temperature adjusting circuit that rectifies the induced voltage of the third induction coil into a direct current and operates by the direct current. Induction heating device. 5. A main body having a first induction coil for inductively heating a container accommodating food to be cooked, and a second induction coil provided outside the first induction coil, and rotatable to the main body. And a third induction coil electromagnetically coupled with the second induction coil when the lid provided on the main body is placed on the main body, and an induced voltage of the third induction coil. An electromagnetic induction heating device, comprising: an auxiliary heating member that has a heating unit that generates heat based on the above, and that heats the food. 6. A main body having a first induction coil for inductively heating a container containing a food to be cooked, and a second induction coil provided outside the first induction coil, and mounted on the main body. A lid forming a cooking chamber with the main body, a third induction coil electromagnetically coupled to the second induction coil when the lid is provided on the main body and placed on the main body, the third An auxiliary heating member having heating means for generating heat based on the induced voltage of the induction coil to heat the food, and the lid is formed in a two-divided configuration, and one of the divided lids is provided. The electromagnetic induction heating device is rotatably provided on the main body. 7. A main body having a first induction coil for inductively heating a container accommodating food to be cooked, and a second induction coil provided outside the first induction coil, and mounted on the main body. A lid forming a cooking chamber with the main body, a third induction coil provided on the lid and electromagnetically coupled to the second coil when the lid is placed on the main body, the third coil An auxiliary heating member having a heating unit that generates heat based on the induced voltage of the induction coil and heats the food, and the lid is formed of at least two parts.
An electromagnetic induction heating apparatus, wherein one of the divided lids is attached to another lid by a rotating means. 8. An apparatus main body and a container detachably accommodated in the main body, wherein induction coils are respectively provided on a bottom portion and a side wall portion of a storage portion of the container in the main body, and an induction coil is provided on an upper portion of the main body. A lid body that is detachably mounted, an auxiliary induction coil that is provided on the lid body and that is electromagnetically coupled to the induction coil of the side wall when the lid body is placed on the main body, and an induced voltage of the auxiliary induction coil. An electromagnetic induction heating device, comprising: an auxiliary heating member having a heating means for generating heat based on the above and heating a cooking product. 9. An apparatus main body and a container detachably accommodated in the main body, wherein induction coils are provided on a bottom portion and a side wall portion of a storage portion of the container in the main body, and an induction coil is provided on an upper portion of the main body. A lid body that is detachably mounted, an auxiliary induction coil that is provided on the lid body and that is electromagnetically coupled to the induction coil of the side wall when the lid body is placed on the main body, and an induced voltage of the auxiliary induction coil. An electromagnetic induction heating device comprising: an auxiliary heating member having heating means for generating heat based on the above, and a heating means for heating a cooking product, the heating means being detachably provided on the lid. 10. A main body provided with an induction coil, an auxiliary induction coil electromagnetically coupled to a part of the induction coil, and heat generated based on an induced voltage of the auxiliary induction coil,
An electromagnetic induction heating device comprising: an auxiliary heating member having heating means for heating the cooked food on the upper surface of the main body. 11. A main body provided with a main induction coil for inductively heating a cooking container, a main body frame detachably provided on the upper surface of the main body and surrounding the cooking container, and a main body frame detachably mounted on the top of the main body frame. Auxiliary having a lid body, an auxiliary induction coil provided on the lid body and electromagnetically coupled to a part of the main induction coil, and a heating means for generating heat based on an induced voltage of the auxiliary induction coil to heat a food item. An electromagnetic induction heating device comprising: a heating member.