JPS633440B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a composite cooking device that integrates an induction cooking device and an electric heater stove.

In recent years, induction heating cookers have become popular in homes, but these induction heating cookers can only be used with cooking containers made of materials such as enamel or iron. When using other cooking vessels, electric heater stoves and gas stoves were indispensable. However, it is common for kitchens to be equipped with not only induction heating cookers, but also electric heater stoves, gas stoves, etc., which is extremely inconvenient in terms of space occupied in small kitchens.

Therefore, a composite cooking device was developed in which an induction heating cooker and an electric heater stove are vertically stacked and integrated, and the induction heating cooker and electric heater stove can be used freely as needed. It is being put into practical use. By the way, in such a combination cooker, the induction heating cooker is turned on,
Cooking is performed by high-frequency oscillation drive of an induction coil based on an off-switching operation, and the output is controlled by changing the on/off period of the on-off switching operation. On the other hand, the output of the electric heater stove is controlled by switching the heater connections. Therefore, each cooker requires a dedicated output control knob and circuit, which has the disadvantage of increasing costs. Furthermore, since there are multiple operation knobs, there is a risk of erroneous operation. Furthermore, since the output of the electric heater stove is controlled by switching the connections, there is a natural limit to the output control depending on the number of switching stages of the connections, making it difficult to obtain the optimal output for cooking.

This invention was made in view of the above circumstances, and its purpose is to make it possible to share the output control knobs and circuits for each cooker, thereby significantly reducing costs. It is an object of the present invention to provide a composite cooking device which can perform a variety of cooking operations, eliminate the risk of erroneous operation, and furthermore enable optimal output control depending on the situation.

An embodiment of the present invention will be described below with reference to the drawings.

In FIGS. 1 and 2, 1 is a main body, and this main body 1 includes a first casing 2 and a second casing which is pivotally connected to the upper surface of the first casing 2 in the direction of the arrow A-A'. It consists of 2 housings 3. The top surface of the first housing 2 has a first
An electric heater stove 4 having a heating section, for example, a spiral heater 4a, is provided, and an air outlet 5 and an air inlet 6 are respectively formed at positions sandwiching the electric heater stove 4 in the front and rear. Dampers 7 and 8 are provided inside the wind outlet 5 and the wind inlet 6, respectively. When the second casing 3 is opened, the dampers 7 and 8 come into close contact with the wind outlet 5 and the wind inlet 6 by the biasing force of a spring (not shown) to block the ventilation and also to prevent the second casing 3 from opening. When closed, damper opening claws 17b and 18, which will be described later, come into contact with each other to open as shown in the figure against the biasing force of the spring, thereby forming a ventilation path. Further, an air suction port 9 is formed at the bottom of the front side of the first casing 2, and an air exhaust port 10 is formed at the bottom of the back side. Furthermore, inside the first housing 2, there is a control section (power unit) 11 that controls power supply to the electric heater stove 4 and the induction coil 14, which will be described later.
A cooling fan 12 is also provided.

On the other hand, a top plate 13 of a second heating unit, such as an induction heating cooker, is provided on the upper surface of the second casing 3, and an induction coil 14 is disposed within the second casing 3 corresponding to the top plate 13. ing. Further, a wind inlet 15 corresponding to the wind outlet 5 of the first housing 2 is formed on the front side bottom surface of the second housing 3, and an air flow inlet 15 corresponding to the wind inlet 6 of the first housing 2 is formed on the rear side bottom surface. An outlet 16 is formed. Further, a dogleg-shaped lever 17 is rotatably supported approximately at the center of the second housing 3 on the inner front side.
One end of 7 passes through the front surface of the second casing 3 as shown by arrow B-
The handle 17a is movable in the B' direction, and the other end passes through the bottom surface of the second casing 3, and the damper opening claw 17b
It is becoming. This damper opening claw 17b
When the casing 3 is closed, the damper 7 remains inside the first casing 2.
This will open up the world. Furthermore, a protruding damper opening pawl 18 is formed on the bottom of the rear side of the second housing 3 near the air outlet 16. This damper opening claw 18 exists within the first housing 2 and opens the damper 8 when the second housing 3 is closed.

In addition, micro switches 19 and 20 are provided in the first housing 2 to detect the opening of the dampers 7 and 8, respectively.
are provided respectively, and these switches 19,
By the operation of 20, for example, the power supply control mode for induction cooking by the control unit 11 and the power supply control mode for heater heating cooking by the electric heater stove 4 are switched. Also, the first
An operating section 23 having a power switch 21 and an output control knob 22 is provided on the front surface of the housing 2 .

FIG. 3 is a block diagram specifically showing the control section 11. As shown in FIG. That is, the control unit 11 can be roughly divided into a main control circuit 30, an induction coil drive circuit 40 that drives the induction coil 14 in high-frequency oscillation, and a heater drive circuit 5 that drives the heater 4a with direct current on and off.
Consists of 0. The main control circuit 30 includes an output control circuit 31 and a trigger pulse generation circuit 3.
2, a selection circuit 33 and a load detection circuit 34.
The output control circuit 31 outputs an output control signal in response to the operation of the output control knob 22 on the operation section 23.
The trigger pulse generation circuit 32 generates trigger pulses with a period corresponding to the output control signal. The selection circuit 23
Alternatively, the usage status of the induction cooking device and the electric heater stove is detected by the operation of step 20, and either one of the induction coil drive circuit 40 and the heater drive circuit 50 is selectively operated according to the detection result. , and supplies the trigger pulse from the trigger pulse generation circuit 32 to its operating circuit. The load detection circuit 34 detects the operating state of the induction coil drive circuit 40 or the heater drive circuit 50, and uses this detection result to determine the output of the output control circuit 31, the pulse generation timing of the trigger pulse generation circuit 32, etc. It controls the

Here, FIG. 4 specifically shows the drive circuits 40, 50 and their peripheral circuits. That is, 60 is a diode bridge rectifier circuit, and the input terminal is connected to the AC power source 6 via the power switch 21.
1, and a smoothing capacitor 62 is connected to the output end. The drive circuits 40 and 50 and the main control circuit 30 are connected in parallel to the smoothing capacitor 62, respectively. The drive circuits 40, 50 include NPN transistors 71, 72, 73 controlled by the main control unit 30, a triax 74, the induction coil 14, a capacitor 75 which forms an LC series resonant circuit with the induction coil 14, It consists of a load detector 76 and the heater 4a.

Next, the operation in the above configuration will be explained.

First, when performing induction heating cooking, the second housing 3
is closed, and a pot made of iron or enamel containing food to be cooked is placed on the top plate 13. At this time, due to the closing of the second housing 3, the dampers 7 and 8
is opened, a ventilation path is formed between the first housing 2 and the second housing 3, and the micro switch 1 is opened.
9 and 20 are turned on. By setting the desired output using the output control knob 22, preparation for cooking is completed. In this way, when the preparation for cooking is completed and the power switch 21 is turned on, since the switch 19 is on,
The control unit 11 becomes a power supply control mode for induction heating cooking. That is, in the drive circuits 40 and 50, the transistor 73 is turned off and the triax 7 is turned off.
4 is turned on, and in this state, transistors 71 and 72
By turning on and off alternately and at high speed, the capacitor 75 is repeatedly charged and discharged, and high frequency oscillation is performed between the capacitor 75 and the induction coil 14. In this case, transistors 71, 7
The on and off cycles of 2 are determined according to the setting value of the output control knob 21. Further, the charging state of the capacitor 75 is detected by the load detector 76, and this is fed back via the main control circuit 30 to the settings of the on/off periods of the transistors 71 and 72. In this way, induction heating cooking is performed with an output corresponding to the operation of the output control knob 21. Note that when the power switch 21 is turned on, the cooling fan 12 is activated, and the air sucked in from the air suction port 9 is sent to the control unit 11 as cooling air.
At the same time, part of the cooling air is supplied to the induction coil 14 through the wind inlets 5 and 15. The cooling air that has passed through the induction coil 14 passes through the air outlet 16 and the air inlet 6, and is discharged from the air outlet 10 together with the cooling air that has passed through the control unit 11.

Next, when performing heating cooking with a heater, handle 1
7a is lifted to open the second housing 3, and the pot containing the food to be cooked is placed on the electric heater stove 4. At this time, when the second housing 3 is opened, the dampers 7 and 8 are closed, preventing dirt and food particles from entering the first housing 2, and the micro switches 19 and 20 are turned off. By setting the desired output using the output control knob 22, preparation for cooking is completed. In this way, when the power switch 21 is turned on when preparation for cooking is completed, since the switch 19 is turned off, the control section 11 enters the power control mode for heater heating cooking. That is, in the drive circuits 40 and 50, the transistor 62 and the triax 74
are both turned off and the transistor 73 is turned on. In this state, the transistor 71 is turned on and off, thereby applying a rectangular wave DC signal voltage to the heater 12. In this case, the load detector 76 detects the energization state of the heater 12, which causes a delay time in the on/off control of the transistor 71 based on the main control circuit 30 at the start of energization, so that the optimum This is the output control. In this way, heater heating cooking is performed with an output corresponding to the operation of the output control knob 21.

Therefore, the on/off period of the switching means in the control section 11 is set in accordance with the operation of the output control knob 22, and the high frequency oscillation drive of the induction coil 14 and the on/off drive of the heater 4a are performed by this switching means. At the same time, the high-frequency oscillation drive of the induction coil 14 and the on/off drive of the heater 4a are switched according to the usage status of the induction heating cooker and the electric heater stove, so that the output control knob and circuit for each cooker are changed. can be made common, thereby significantly reducing costs. Moreover, since there is only one output control knob, the risk of erroneous operation is eliminated. Furthermore, since the output of the electric heater stove can be controlled steplessly in the same manner as the induction heating cooker, it is possible to carry out optimal cooking according to the situation.

In the above embodiment, the switch 19 or 2
0 to detect the usage status of the induction heating cooker and the electric heater stove, but the usage status can now be detected by phase detection (R, L, C components) based on the load detector 76. You may also do so. In addition, it goes without saying that the present invention is not limited to the above-mentioned embodiments, and that various modifications can be made without changing the gist.

As described above, according to the present invention, the on/off cycle of the switching means in the control section is set in accordance with the operation of the output control knob, and the high frequency oscillation drive of the induction coil in the induction heating cooker is performed by this switching means. In addition, the high-frequency oscillation drive of the induction coil and the on/off drive of the heater are switched according to the usage status of the induction cooking stove and the electric heater stove. , the output control knobs and circuits for each cooker can be shared, which can significantly reduce costs and eliminate the risk of incorrect operation. A composite cooker that enables output control can be provided.

[Brief explanation of the drawing]

The drawings show one embodiment of the invention.
The figure is an overall perspective configuration diagram, Figure 2 is a schematic diagram of the internal mechanism, Figure 3 is a block diagram schematically showing the control section, and Figure 4 is a configuration specifically showing the main parts of Figure 3. It is a diagram. 2...First housing, 3...Second housing, 4...Electric heater stove, 11...Control unit, 13, 14...
Induction heating cooker (top plate and induction coil, 19, 20...micro switch, 22...
Output control knob, 30...main control circuit,
40...Induction coil drive circuit, 50...Heater drive circuit.

Claims (1)

[Claims] 1. In a composite cooking device that integrates an induction heating cooker and an electric heater stove, a detection means for detecting the usage status of the induction heating cooker and the electric heater stove, an output control knob, and an operation control knob for the output control knob are provided. It has a switching means that turns on and off at a corresponding period, and when the detection means detects the use of the induction heating cooker, the induction coil of the induction heating cooker is driven to high frequency oscillation by the switching means. and a control section that turns on and off the heater of the electric heater stove by the switching means when the detection means detects the use of the electric heater stove.