JP3060797B2 - Heating equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating device for heating food for cooking.

[0002]

2. Description of the Related Art As an example of a heating apparatus, a microwave oven will be described as a conventional technique.

FIG. 13 shows the structure of a conventional microwave oven. Ten
1 is a magnetron for generating microwaves, 102 is a magnetron driving circuit comprising a power supply circuit and a control circuit for driving the magnetron 101, and 103 is for guiding the microwaves generated by the magnetron 101 into a heating chamber containing food. Waveguide, 104 is a table for placing food, 105 is a table constant speed drive for rotating the table 104 at a constant speed, 106 is a stirrer fan for stirring microwaves coming out of the waveguide 103, Reference numeral 107 denotes a stirrer fan constant speed driving device for rotating the stirrer fan 106 at a constant speed.

In the microwave oven configured as described above,
The food is heated by guiding the microwave generated by the magnetron 101 through the waveguide 103 into the heating chamber.

Further, in order to prevent uneven heating of the food, the table 104 is rotated and the stirrer fan 106 is rotated to make the electric field intensity in the refrigerator uniform.

In the conventional example of FIG. 13, both a mechanism for rotating the table 104 and a mechanism for rotating the stirrer fan are used.

[0007]

However, in the conventional microwave oven described above, the table 104 and the stirrer fan 106 are not used.
Is driven only at a constant rotational speed, and even if both the table 104 and the stirrer fan 106 are driven as in the conventional example, there is a problem that the strength of the electric field in the refrigerator cannot be made sufficiently uniform. .

[0008] The same applies to other heating devices such as rice cookers and electromagnetic cookers, and there is a problem that means for uniformly heating food are insufficient.

The present invention has been made to solve such a problem of non-uniform heating.
It is an object of the present invention to provide a heating device capable of heating evenly.

[0010]

According to the present invention, there is provided a chaos signal generating circuit for generating a chaotic signal, and an operation state of a stellar fan, a table, a magnetron or the like is changed according to an output of the chaotic signal generating circuit. A heating device comprising a drive circuit.

[0011]

The chaotic signal has, as basic characteristics, instability of the trajectory such that it does not assume the same state twice, and denseness such that the trajectory completely fills the range that the signal can take.

[0012] Therefore, the stellar fan of the microwave oven,
By changing the operation of the table, the magnetron, and the like according to the chaos signal, the microwave can be sufficiently stirred, and a microwave oven capable of uniform heating can be realized.

The same applies to other heating devices such as a rice cooker and an electromagnetic cooker. By changing the output of a heater or the like in a chaotic manner, uniform heating becomes possible.

[0014]

【Example】

(Embodiment 1) FIG. 1 is a diagram showing a configuration of a heating apparatus according to a first embodiment of the present invention, and specifically shows a configuration of a microwave oven.

In FIG. 1, 101 is a magnetron, 102 is a magnetron drive circuit, 103 is a waveguide, 104 is a table,
Reference numeral 106 denotes a star fan, the configuration of which is the same as that of the conventional example. The difference from the conventional example is that a chaotic signal generating circuit 1 for generating a chaotic signal and a stirrer fan driving device 2 for controlling the rotation of the stirrer fan 106 according to the output of the chaotic signal generating circuit 1 are provided.

A chaotic signal is an irregular signal governed by relatively simple rules. (See Nagashima and Baba, Introduction to Chaos, Analysis and Mathematics of Phenomena, Baifukan) Pai-Kone transformation is known as the basis of a system that generates chaotic signals. The piconet transformation is a transformation in which stretching and folding are repeated as shown in FIG. FIG. 2 shows the operation of stretching one dough and folding it into two. By repeating this stretching and folding conversion several times, the components of the puff pastry mix and become a uniform puff pastry.

The Paikone transform is particularly excellent in its ability to homogenize objects. For example, applying a Paikon transform 10 times to a 1 cm thick dough will result in 1024 layers of dough of about 10 microns, and when the transform is repeated up to 20 times, the dough layer will have a molecular level thickness. To over 1 million layers. This indicates that the piconet transform has the ability to make the target sufficiently uniform.

A typical example of a function that creates a chaotic signal is a transformation called Bernoulli shift represented by the following equation.

[0019]

(Equation 1)

From equation (1), Bernoulli shift x (n) and x (n−
The relationship of 1) can be illustrated as shown in FIG. FIG. 4 shows time-series data by Bernoulli shift calculated from (Equation 1). Although the time-series data is calculated according to a very simple mathematical formula shown in (Equation 1), it seems to show irregular behavior.

The data x (n) belonging to the region of 0 <x (n) ≦ 0.5 on the horizontal axis of FIG. 3 is enlarged (doubled) by Bernoulli shift, and x (n +) of 0 <x (n) ≦ 1.0. Converted to 1). 0.5 <x (n) ≦ 1.0
The same applies to the part. This conversion corresponds to the extension of the piconet conversion.

Further, as is apparent from the figure, 0 <x (n) ≦
After the data of 0.5 and 0 <x (n) ≦ 1.0 are enlarged, they are respectively mapped to the same area of 0 <x (n) ≦ 1.0. This operation means the folding of the Paikone transform.

Accordingly, it can be seen that the Bernoulli shift performs the extension of the Paikoné conversion and the conversion of the folding.

From this, it is known that a chaotic signal derived from a transform such as Bernoulli shift has a feature of making a target uniform since it has a piconet transform as its basic characteristic. It should be noted that there are various functions such as a logistic function and a tent mapping in addition to the Bernoulli shift as a conversion having the piconet conversion as a basis.

The characteristics of this uniformization are related to the initial value dependence of chaos, orbital instability, and denseness. (See Nagashima and Baba, Introduction to Chaos, Analysis and Mathematics of Phenomena, Baifukan)
These properties are related to each other, but denseness is particularly important. This means that a chaotic system behaves so as to densely fill the output space and state space of the system. Chaos also has the property that the state of the system constantly changes and does not assume the same state twice, which is closely related to orbital instability.

By rotating the stirrer fan 106 of the microwave oven in proportion to the chaos signal, the stirrer fan 106 can take various operating states and sufficiently stir the microwave in the refrigerator. Therefore, a more uniform electric field distribution in the refrigerator can be obtained as compared with a conventional microwave oven having a stirrer fan rotating at a constant speed.

The chaos signal generation circuit 1 shown in FIG. 1 is composed of an electric circuit for generating a chaos signal. As a specific configuration, for example, a microcomputer may calculate (Equation 1) and output a signal, or a document `` Chaos-Basics and Applications of Chaos Theory-'' (Aihara Kazuyuki, Science Inc.)
An electric circuit as shown in FIG. 5 described in Chapter 2 may be used.

A signal generated from the chaos signal generation circuit 1 is an on / off signal as shown in FIG. 6 and a signal whose pulse interval t1, t2,... Is a chaotic time series signal. But it is good.

The stirrer fan driving device 2 shown in FIG. 1 is a device that changes the rotation speed of the stirrer fan in proportion to the output of the chaos signal generation circuit 1. This stirrer fan drive
By setting the movement of the stellar fan into a chaotic state, the stellar fan can be put into various operation states. As a result, the microwave in the refrigerator is sufficiently stirred, and the electric field distribution in the refrigerator can be made uniform as in the case of the piconet conversion.

As described above, according to the present embodiment, the electric field in the microwave oven can be kept uniform by rotating the stirrer fan according to the chaos signal, and cooking without uneven grilling can be realized.

In this embodiment, the rotation speed of the stirrer fan 106 is changed by the chaos signal. However, as shown in FIG. 7, the chaos signal generation circuit 1 is connected to the table driving device 3 and the table 104 for placing food is placed. The same effect can be obtained by changing the rotation speed and the rotation angle of the device by a chaos signal. Further, as shown in FIG. 8, the chaotic signal generation circuit 1 may be connected to the magnetron drive circuit 102, and the intensity of the output microwave may be changed according to the chaotic signal.

In the first embodiment, a specific example has been described for a microwave oven, but a similar effect is produced in an oven toaster as shown in FIG. FIG. 9 is a diagram showing a configuration of an oven toaster, 21 is an upper heater for heating the pan in the heating chamber from above, 22 is a lower heater for heating the pan from below, 23 is an upper heater 21 and a lower heater 22. , An output control circuit 24 for controlling the output of the power supply circuit 23, and 1 a chaos signal generation circuit similar to the above-described embodiment. In this example, the output control circuit 24 controls the output of the power supply circuit 23 according to the chaos signal generated from the chaos signal generation circuit 1, and changes the outputs of the two heaters chaotically. For this reason, uniform heating is realized as in the above-described embodiment.

(Embodiment 2) FIG. 10 shows a configuration diagram of a heating device according to a second embodiment of the present invention, and specifically shows a configuration of a rice cooker.

In FIG. 10, reference numeral 31 denotes an inner pot for putting rice and water, 32 a lid for sealing the inner pot, 33 a heater for heating the inner pot 32, and 34 a heater for heating the heater 33. A power supply circuit for supplying necessary power; 35, an output control circuit for controlling the output of the power supply circuit 34 to change the heating amount of the heater 33;
Reference numeral 1 denotes a chaos signal generation circuit for generating a chaos signal, which is the same as that in the first embodiment.

The rice cooker performs rice cooking on the rice in the inner kettle 31 by sequentially performing four processes of water absorption, cooking, maintaining boiling, and steaming. For this reason, the heater 33 arranged around the inside of the inside (lower or side or upper surface)
The rice in the inner pot is heated with the output according to each process.

Recently, several temperature sensors are provided on the outside of the inside of the inside of the kettle, and the total number of rice is determined based on temperature information obtained from the sensors. Rice cookers have also been developed that determine this.

However, once the heating amount is determined,
The heating amount of each process was constant at the determined value, and the output of the heater did not change in the process.

In the inner shell 31, water (hot water) circulates between the rice grains due to heating by the heater 33. The direction of circulation is mainly in the vertical direction, and the circulation of water becomes intense, especially in the process of cooking and maintaining boiling. By the circulation of the water, the temperature of the rice in the inner shell 31 is equalized.

However, conventionally, since the output of the heater 33 is kept constant in each process, once the water circulation path is completed according to the physical arrangement of the rice grains, the position of the heater, and the like, the path is changed. However, rice near the route was overheated, and rice far from the route was insufficiently heated, causing uneven cooking.

This phenomenon is particularly remarkable in a process in which the amount of heating is large and the circulation of water is intense, such as for cooking and maintaining boiling, and in a rice cooker in which the design of the position and shape of the heater is inappropriate, large unevenness in cooking is caused. Had occurred.

In order to solve the problem of uneven cooking, in the present invention, the output of the heater 33 is changed by a chaos signal to realize uniform rice cooking without uneven cooking.

As described in the first embodiment, a chaotic signal has a mapping such as a piconet transformation as a basic characteristic, and has a trajectory instability that it does not take the same state as twice. Therefore, by changing the output of the heater 33 according to the chaos signal, the circulation path of the water in the inner shell 31 can be constantly changed. In addition, the change of the water circulation path is not regular, but changes according to a chaotic signal having orbital instability. Therefore, the circulation path of water varies in a seemingly random manner.

By the chaotic change of the water circulation path, sufficiently uniform rice cooking is realized. As a specific configuration, the output control circuit 35 controls the power supply circuit 34 based on the signal generated by the chaotic signal generation circuit 1 to change the output of the heater chaotically. Chaos signal generation circuit 1
Has the same configuration as that of the first embodiment, and may be an electric circuit as shown in FIG. 5, or may generate a signal by a method of calculating a function such as Bernoulli shift using a microcomputer or the like.

As described above, according to the present embodiment, the chaos signal generating circuit 1 is provided, and the heater 33 of the rice cooker is controlled in accordance with the signal, thereby variously circulating the water in the inner pot. It can be varied and the temperature distribution of rice can be kept constant. Therefore, it is possible to cook rice without uneven cooking.

A rice cooker has been developed in which a magnetic force generating coil is used as the heater 33 and rice is cooked using induction heating of the inner shell. Also in such a rice cooker, by changing the amount of chaotic heating using the chaotic signal generation circuit 1, it is possible to realize a rice cooker in which the rice is not cooked as in the present embodiment.

(Embodiment 3) FIG. 11 is a view showing a configuration of a heating apparatus according to a third embodiment of the present invention, and specifically shows a configuration of a hot plate.

In FIG. 11, reference numeral 41 denotes a metal plate on which food is placed; 42, a heater for heating the metal plate 41; 43, a power supply circuit for supplying electric power necessary for causing the heater 42 to generate heat; An output control circuit 1 for controlling the output of the power supply circuit 43 to change the amount of heat generated by the heater 42 is a chaos signal generation circuit for generating a chaos signal, which is the same as that of the first embodiment.

On the lower surface of the metal plate 41, a plurality of heaters 42 are arranged as shown in the figure. The metal plate 41 is heated by supplying electric power to each of the heaters 42 using the power supply circuit 43.

In a normal hot plate, the heater 42 is often arranged at several places on the metal plate as shown in the figure, and does not cover the entire surface of the metal plate. Therefore, heat distribution occurs in the metal plate.

In this embodiment, as in the first and second embodiments, uniform heating is realized by changing the amount of heating of the heater chaotically using the chaotic signal generation circuit 1.

As described in the first embodiment, as a basic characteristic, a chaotic signal has a mapping such as a piconet transform and has orbital instability such that it does not take the same state as twice. Therefore, by changing the output of the heater 42 in accordance with the chaos signal, the temperature of each portion of the metal plate 41, the speed at which heat is transmitted, and the like constantly change, and as a result, uniform heating becomes possible.

As described above, according to the present embodiment, the chaotic signal generation circuit 1 is provided, and the heater 42 of the hot plate is controlled in accordance with the signal to change the heat distribution of the metal plate in various ways. The temperature distribution of the metal plate can be made constant. Thereby, cooking without uneven grilling can be realized.

It is also possible to use an on / off signal as shown in FIG. 6 as a signal of the chaotic signal generation circuit 1 and change the pulse width chaotically. In this case, the heater is also turned on and off, but the temperature of each part of the metal plate smoothly changes due to the heat capacity of the metal plate. For this reason, sufficiently uniform heating can be performed even using a signal as shown in FIG.

(Embodiment 4) FIG. 12 shows a configuration diagram of a heating device in a fourth embodiment of the present invention, and specifically shows a configuration of an electromagnetic cooker.

In FIG. 12, 50 is a magnetic force generating coil, 51 is a high frequency current generating circuit composed of a power supply for generating a high frequency current to be supplied to the magnetic force generating coil 50, and 52 is output from the high frequency current generating circuit 51. This is an output control circuit that controls the output of the high-frequency current. Note that reference numeral 1 in FIG. 12 denotes a chaos signal generation circuit for generating a chaos signal, which is the same as that in the first embodiment.

The electromagnetic cooker is a heating device that causes an eddy current to flow through the pan by the alternating magnetic force generated by the magnetic force generating coil 50, and performs cooking using heat generated by the metal resistance of the pan (induction heating).

Similar to the hot plate in the third embodiment, the electromagnetic cooker has a problem that the heating is not sufficiently uniform. Since the electromagnetic cooker causes the pot itself to generate heat, the size and distribution of the eddy current induced in the pot vary depending on the shape, material, and thickness of the pot, and particularly on the state of contact between the bottom of the pot and the main body. For this reason, uneven cooking may occur even in the electromagnetic cooker.

In this embodiment, similarly to the first to third embodiments, the high-frequency current generation circuit 5 using the chaos signal generation circuit 1 is used.
By changing the output of 1 chaotically, uniform heating cooking is realized.

As described in the first embodiment, a chaotic signal has a mapping such as a piconet transformation as a basic characteristic.
It has orbital instability that it does not take the same state twice. Therefore, by changing the output of the high-frequency current generation circuit 51 in accordance with the chaos signal, the magnitude of the eddy current and the heat conduction state of each part of the pan constantly change, and as a result, uniform heating becomes possible.

As described above, according to the present embodiment, the magnitude of the eddy current generated in the pan and the heat generated by controlling the high-frequency current generation circuit 51 according to the chaotic signal generation circuit 1 are provided. The conduction state and the like can be varied in various ways, and the temperature distribution of the pan can be kept constant. Thereby, cooking without uneven heating can be realized.

The same effect can be obtained by using an on / off signal as shown in FIG. 6 as the signal of the chaotic signal generation circuit 1 and changing the pulse width chaotically.

[0062]

As described above, according to the present invention,
By driving a heater, a table, a stirrer fan, and the like of each heating device using the chaos signal generation circuit, uniform heating and cooking can be performed.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a microwave oven according to a first embodiment.

FIG. 2 is an explanatory diagram of a piconet conversion.

FIG. 3 is an explanatory diagram of Bernoulli shift.

FIG. 4 is a diagram showing time-series data generated by Bernoulli shift;

FIG. 5 is a diagram showing an electric circuit for generating a chaotic signal.

FIG. 6 is a diagram showing a chaotic ON / OFF signal;

FIG. 7 is a diagram showing a configuration of a microwave oven for rotating a table chaotically.

FIG. 8 is a diagram showing a configuration of a microwave oven that drives a magnetron chaotically.

FIG. 9 is a diagram showing a configuration of an oven toaster in which the output of a heater is chaotically changed.

FIG. 10 is a diagram showing a configuration of a rice cooker according to a second embodiment.

FIG. 11 is a diagram showing a configuration of a hot plate according to a third embodiment.

FIG. 12 is a diagram showing a configuration of an electromagnetic cooker according to a fourth embodiment.

FIG. 13 is a diagram showing a configuration of a conventional microwave oven.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Chaos signal generation circuit (microwave oven) 2 Stirrer fan drive (microwave oven) 3 Table drive (microwave oven) 21 Upper surface heater (oven toaster) 22 Lower surface heater (oven toaster) 23 Power supply circuit (oven toaster) 24 Output control circuit (Oven toaster) 31 Inside kettle (rice cooker) 32 Lid (rice cooker) 33 Heater (rice cooker) 34 Power supply circuit (rice cooker) 35 Output control circuit (rice cooker) 41 Metal plate (hot plate) 42 Heater (hot) Plate) 43 power supply circuit (hot plate) 44 output control circuit (hot plate) 50 magnetic force generating coil (electromagnetic cooker) 51 high frequency current generating circuit (electromagnetic cooker) 52 output control circuit (electromagnetic cooker) 101 magnetron (microwave oven) ) 102 Magnetron drive circuit (electronic ) 103 waveguide (microwave) 104 Table (microwave) 105 Table constant speed drive device (microwave oven) 106 Sutarafan (microwave) 107 Sutarafan constant speed drive device (microwave oven)

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification code FI F24C 7/02 551 F24C 7/02 551Q 7/04 301 7/04 301Z G05D 23/19 G05D 23/19 J H05B 6/68 320 H05B 6/68 320B 6/78 6/78 A 11/00 11/00 C // G05B 13/02 G05B 13/02 Z (58) Fields investigated (Int. Cl. ⁷ , DB name) H05B 6/74 A47J 27/00 109 A47J 37/06 321 A47J 37/08 F24C 7/02 340 F24C 7/02 551 F24C 7/04 301 G05D 23/19 H05B 6/68 320 H05B 6/78 H05B 11/00 G05B 13/02

Claims (7)

(57) [Claims] A magnetron for generating a microwave; a magnetron driving circuit comprising a power supply circuit for driving the magnetron; and a magnetron driving circuit for generating a microwave. A waveguide for guiding the microwaves to the heating chamber, and a chaos signal generation circuit for generating a chaos signal in a microwave oven comprising a stirrer fan for stirring the microwave in the heating chamber; and a chaos signal generation circuit. A microwave oven comprising a stirrer fan drive circuit for rotating the stirrer fan according to an output. 2. A heating chamber for storing an object to be heated for heating, and a table on which the food in the heating chamber is placed and rotated,
In a microwave oven including a magnetron that generates a microwave, a magnetron driving circuit including a power supply circuit for driving the magnetron, and a waveguide for guiding the microwave generated from the magnetron to the heating chamber. A microwave oven comprising: a chaos signal generation circuit for generating a chaos signal; and a table driving circuit for rotating the table in accordance with an output of the chaos signal generation circuit. 3. A magnetron driving circuit including a heating chamber for storing an object to be heated for heating, a magnetron for generating microwaves, a power supply circuit for driving the magnetron, and a magnetron generated by the magnetron. Signal generator for generating a chaotic signal, and a magnetron drive circuit for changing the output of the magnetron in accordance with the output of the chaotic signal generator, in a microwave oven comprising a waveguide for guiding the microwaves to the heating chamber. A microwave oven comprising: 4. A heating chamber for storing an object to be heated for heating, a heater for heating the object to be heated, and a power supply circuit for supplying electric power necessary for heat generation of the heater to the heater. The toaster includes a chaos signal generation circuit that generates a chaos signal, and an output control circuit that changes an output power of the power supply circuit according to an output of the chaos signal generation circuit to change a calorific value of the heater. Toaster. 5. A rice cooker comprising a kettle for adding cereals and water, a heater disposed on an outer periphery of the kettle, and a power supply circuit for supplying power required for heat generation of the heater to the heater. A rice cooker comprising: a chaos signal generation circuit that generates a chaos signal; and an output control circuit that changes an output power of the power supply circuit according to an output of the chaos signal generation circuit to change a calorific value of the heater. . 6. A metal plate on which an object to be heated is placed, a heater disposed on a lower surface of the metal plate, and a power supply circuit for supplying electric power required for heat generation of the heater to the heater. The hot plate further includes a chaos signal generation circuit that generates a chaos signal, and an output control circuit that changes an output power of the power supply circuit according to an output of the chaos signal generation circuit to change a calorific value of the heater. And hot plate. 7. An electromagnetic cooker comprising a magnetic force generating coil for generating induction heating in a cooking utensil such as a pan or a frying pan, and a high frequency current generating circuit for generating a high frequency current to be supplied to the magnetic force generating coil. An electromagnetic circuit, comprising: a chaotic signal generating circuit for generating a signal; and an output control circuit for changing an output current of the high-frequency current generating circuit according to an output of the chaotic signal generating circuit to change an output of the magnetic force generating coil. Cooking device.