JPH0618044A - Heat cooking apparatus - Google Patents

Abstract

PURPOSE:To provide high-speed heat cooking and extend cooking category by heating an oven plate by means of magnetic flux generated from a heating coil. CONSTITUTION:Provided are an oven 5 adapted for receiving therein food, a retrievable oven plate 52 provided in the oven 5, heating coils 53-56 adapted for inducing current at least on the outer peripheral portion thereof to subject the oven plate 52 to induction heating, and a high frequency electric power generator 8, 60 for supplying electric power of high frequency to the heating coils 53-56. High-speed heat cooking of food is realized by directly heating the oven plate 52 by means of flux of high frequency generated from the heating coils 53-56, and cooking category is extended to greatly improve convenience of use.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to oven heating of food,
The present invention relates to a heating / cooking device such as an oven for grill heating or dielectric heating.

[0002]

2. Description of the Related Art Heretofore, as a cooking apparatus such as an oven, the one having a structure shown in FIG. 9 has been put into practical use.
FIG. 9 is a sectional view showing the structure of the oven range. In the figure, inside the housing 1, there is an oven (an oven wall) 5 in which foods 4 placed on a table 3 for placing foods on a turntable 2 are stored. -The waveguide 7 that guides the dielectric heating radio waves generated from the magnetron 6 into the oven 5, the power converter 8 that supplies high-frequency power to the magnetron 6, the magnetron 6, the power converter 8, the housing 1, etc. are cooled. A cooling fan 9 and the like are provided. The cooling wind of the cooling fan 9 flows through the housing 1 as shown by the arrow in the figure to cool the cooled object. In addition, 10 is a turntable
It is In the oven 5, flat heater units 11 and 12 are provided on the upper surface and the lower surface, respectively, for performing the oven heating or the grill heating.
And the heat insulating materials 13, 14, 15, 16 are the ovens 5.
On the other hand, the heating energy supplied from the flat heater units 11 and 12 is prevented from being dissipated to the outside, and the heating efficiency is enhanced.

FIG. 10 is an electric circuit diagram of this open range, and those having the same reference numerals as those in FIG. 5 are corresponding components. The oven range receives power from the commercial power source 20,
Control unit 21 including a microcomputer and the like
Controlled by. That is, the control unit 21 controls the relay contacts 22 to 26, the control circuit 27 of the power converter 8 and the like to realize the oven cooking function. The power converter 8 is the diode bridge 2
8. An inverter circuit including a rectifier circuit including a choke coil 29, capacitors 30 and 31, a step-up transformer 32, a transistor 33, and a diode 34, and a capacitor 3
5. A high-voltage rectifier circuit including diodes 36 and 37, current transformers 38 and 39, a capacitor 40, etc., and supplies high-voltage DC power and cathode heating power to the magnetron 6. is there.

With this structure, the food 4 is heated by the heating energy of the flat heater units 11 and 12.
Bun heating and grill heating were possible, and combined heating with dielectric heating by the radio wave generated by the magnetron 6 was also possible if necessary.

[0005]

However, such a conventional high-frequency heating apparatus, in particular, when supplying radiant energy or convective energy by convective air heating into the oven by a flat heater unit, Due to the structure, there are drawbacks such that the rising speed of the temperature in the oven becomes slow, or the heating efficiency becomes inevitably low. This was based on the structure of the flat heater unit as shown in FIG.

FIG. 11 is a diagram showing an example of a detailed structure of the oven wall 5, the heater unit 11, and the heat insulating material 13.
In the figure, between the oven wall 5 and the heat insulating material 13, a flat heater unit 11 including a heating element 40 made of nichrome wire or the like, and electrical insulators 41 and 42 sandwiching the heating element 40.
Is provided. Therefore, the heat energy generated by the heating element 40 is turned on via the electric insulator 41 having the thickness t.
It was transmitted to the bun wall 5. This electrical insulator 4
For example, when the commercial power source 20 in FIG. 10 has a voltage of 100 V, 1 must have sufficient withstand voltage performance against that voltage, and if it is 200 V, a higher voltage of 200 V is required.
The pressure resistance performance of was required. Therefore, the heat energy generated by the heating element 40 is transmitted to the oven wall 5 and also to the electrical insulator 42, until the electrical insulator 42 and the heat insulating material 13 reach thermal equilibrium. , The thermal energy had to be transferred to the oven wall 5 and, at the same time, to the heat insulating material 13 on the opposite side. That is, since the electrical insulators 41 and 42 have the same electrical performance, they must have the same thermal performance. Therefore, the electrical insulators 41 and 42 are opposite to the oven wall 5 (i.e., the oven wall 5). The heat energy of the heating element 40 is dissipated toward the outside), and the rising speed of the temperature of the air in the oven and the temperature of the inner surface of the oven wall decreases, and the temperatures reached by them are reduced. There was an inconvenience that it could not be increased. For this reason, not only the heating efficiency is lowered, but also the outer wall temperature of the casing 1 of the oven range becomes high, so that it cannot be installed as if it was in contact with the wall of the room, etc., or the installation conditions are restricted, or There is a problem that there is a risk of being burned by touching the outer wall of the housing 1.

An object of the present invention is to solve the above problems and to provide a heating and cooking apparatus which is safe and can realize high-speed cooking.

[0008]

The present invention has the following constitution in order to achieve the above object. That is,
An oven for storing foods, a removable oven plate provided in the oven, and a heating coil for inducing an induction current in at least an outer peripheral portion of the oven plate for induction heating the oven plate. A high frequency power generator for supplying high frequency power to the heating coil.

An oven for storing food, an freely removable oven plate provided in the oven, a heating coil for inductively heating the oven dish with a magnetic core material, and A high frequency power generator for supplying high frequency power to the heating coil is provided.

Further, the structure is provided with a plurality of heating coils. Further, a plurality of heating coils are provided in the vertical direction of the side wall of the oven corresponding to the plurality of oven plate installation positions.

Further, an oven for storing food,
The oven is provided with a freely removable oven plate, a heating coil for induction heating the oven plate, and a high-frequency power generator for supplying high-frequency power to the heating coil. -A high thermal conductive material is provided on the upper surface side of the pan and a magnetic material is provided on the bottom surface side.

Further, an oven for storing food,
A removable oven plate provided in the oven, a heating coil for induction heating the oven plate, and a high-frequency power generator for supplying high-frequency power to the heating coil are provided, and A heat insulating unit is provided between the oven plate and the oven, and the oven plate is installed at a predetermined position in the oven via the heat insulating unit.

[0013]

The high frequency power generator supplies a high frequency current to the heating coil to induce an induction current in at least the outer peripheral portion of the oven dish to perform induction heating, thereby heating the oven dish. Since the oven dish is heated by the non-contact structure by the induction heating, the taking out from the oven and the installation in the oven are extremely easy, and the oven dish can be easily moved and cleaned. Furthermore, since the oven plate itself is heated, the heating speed of the food to be placed on it is greatly accelerated, and frying pan cooking, which is difficult with the conventional configuration, is possible.

Further, by using the heating coil provided with the magnetic core material, the magnetic flux generated by the heating coil is effectively guided to the portion of the oven plate to be heated, and the heating is performed on the parts other than the oven plate. Structures that should not be used (eg oven walls)
The magnetic flux is prevented from reaching the inner side, and the overall heating efficiency is improved.

Further, by providing a plurality of heating coils, even if the oven plate having a planar shape is heated from the outer circumference, the heating uniformity is improved and the food can be uniformly heated. It is a thing.

Further, by providing a plurality of heating coils vertically on the side wall of the oven, the installation position of the oven dish can be changed according to the type of cooking and the height of the food. It is possible to heat and cook by an oven plate arbitrarily installed at a plurality of heights in the oven.

Further, by providing a high heat conductive material on the upper surface side of the oven dish and a magnetic material on the bottom surface, efficient induction heating of the bottom side of the oven dish is possible, and The heating distribution generated from the distribution of the induced current is relaxed by the high heat conductive material on the upper surface side, which enables uniform heating of the food placed in the oven dish and highly efficient induction heating. In particular, for induction heating of the outer peripheral part of the oven dish, the heat generated in the outer peripheral part is quickly transferred to the central part to enable uniform heating of the food even with the central heating of the outer peripheral part. Is.

Furthermore, the oven plate is installed at a predetermined position in the oven via the heat insulating means to suppress the heat radiation from the oven plate to the oven wall. -The heating speed of the oven plate is improved, and since it is thermally separated from the oven wall, the temperature control of only the oven dish is facilitated and the cooking performance is improved.

[0019]

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

FIG. 1 is a sectional view showing the construction of an embodiment of the present invention, in which the same reference numerals as those in FIG. 9 represent corresponding constituent elements. In the figure, on the upper surface of the oven wall 5, a high frequency magnetic field generating means 50 composed of a flat-plate induction heating coil or the like is arranged in parallel with the oven wall 5 via a heat insulating member 13. The high frequency magnetic field generating means 50 receives electric power from a high frequency power source (not shown), generates a high frequency alternating magnetic field, and induces a high frequency current on the upper surface of the oven wall 5. Therefore, the upper surface of the oven wall 5 is directly heated by the high frequency current, so that the food or the like in the oven can be radiantly heated.
Above the high frequency magnetic field generating means 50, there is further provided a shielding means 5 made of ferrite, an aluminum plate or a combination material thereof.
1, the high frequency leakage magnetic field heats the housing 1,
The influence of unwanted radiation noise on other electronic equipment outside the oven range is prevented. In this embodiment, the high frequency magnetic field generating means 50 is used to form the oven wall 5
However, the present invention is not limited to this. For example, a sheathed heater or a planar heater,
Alternatively, a radiation type heater such as a tube-shaped heater can be used. Further, instead of heating the upper surface of the oven wall 5, a so-called convection oven configuration may be used in which hot air is supplied to the inside of the oven wall 5. Reference numeral 52 is an oven plate which is configured to be freely taken out from the oven 5, on which the food 4 which is an object to be heated is placed. It is desirable that at least the heated portion of the oven plate 52 contains a magnetic material such as an enamel coated iron plate. This is for efficiently performing induction heating described later. 53, 54, 55, 56 are oven plates 52
Is a heating coil for inductively heating the, and when the oven plate 52 is installed at the lower installation position as shown in the figure,
The heating coils 54 and 56 heat the outer peripheral portion of the oven dish 52 from two locations on the left and right. Further, as shown in FIG. 2, when the oven dish 52 is installed at the upper installation position, the heating dish 53 and 55 heat the oven dish 52. Thus, the four heating coils 53 to 56 reduce the heating distribution of the oven dish 52 by heating it from the left and right, and at the same time, reduce
The installation position of the oven plate 52 can be arbitrarily selected according to the type of cooking by providing it in several places. Therefore, in the case of cooking (grill cooking) in which strong radiant heat from the upper wall of the oven 5 heated by the high-frequency magnetic field generating means 50 is required, the oven plate 52 is installed in the upper stage as shown in FIG. In the case of oven cooking performed at a relatively low temperature (about 150 to 200 ° C.) such as cake cooking, the oven dish 52 should be installed in the lower stage as shown in FIG. 1 for cooking. You can In any of the embodiments shown in FIGS. 1 and 2, the oven range of the present invention has a configuration in which an oven plate on which food is placed is directly heated. For this reason,
The food is not only heated by the temperature rise of the air in the oven 5 and radiation from the upper surface of the oven (at a position far from the food), but is also heated by the oven dish 52 close to the food. Therefore, the heating speed of food is significantly faster than that of the conventional oven. According to the experiments conducted by the inventors, the heating speed of the oven of FIG. 1 or 2 in comparison with the conventional oven of FIG. 9 is reduced by 30% to 70% depending on the food. It was That is, according to foods, it is possible to realize an oven range in which speed cooking can be performed in the following short time.

Further, it becomes possible to easily perform frying pan cooking, which has been difficult in the past, or high-temperature heating cooking (eg hamburging) such as teppanyaki. In addition, since cooking in which the oil is scattered is possible in the oven, a new heating cooker that does not pollute the kitchen can be realized.

Further, since the oven plate 52 does not require a connecting means such as wiring for heating, it is very easy to change the installation position and clean it. In addition, after cooking, it is easy to carry it to a table or the like as it is, and a new cooking device directly connected to the table can be realized.

As described above, the oven plate 52 and the oven 5 are provided.
The cooking speed is extremely fast and the cooking speed is extremely fast by controlling the heating by heating or radiation of the heating means (high-frequency magnetic field generating means) 50 on the upper surface of the above and the dielectric heating by the magnetron 6 in combination. It is possible to realize a heating cooking device capable of performing a new type of cooking, which was difficult in the past.

FIG. 3 is a circuit diagram of the heating and cooking apparatus of FIG. 1, and those having the same reference numerals as those in FIGS. 1 and 10 are corresponding components.

In FIG. 3, the second power converter 60 is
Electric power is received by a relay contact 61 controlled by the control unit 21, and a diode bridge, an inductor 63, capacitors 64 and 65, a transistor 66, a diode 67,
The inverter circuit including the control circuit 68 and the current transformer 69 performs a high frequency switching operation. The heating coil 50, which is a high frequency magnetic field generating means on the upper surface of the oven 5, is supplied with a high frequency current when the relay contact 70 is closed. Further, in the oven plate 52, the heating coils 53 to 54 (one coil in the figure) is connected to the relay contact 7
A high-frequency current is supplied when 1 is closed.
With such a configuration, one inverter circuit
The heating coil 50 on the upper surface of the oven and the heating coils 53 to 56 of the oven plate 52 can be operated at the same time or by switching to perform heating and cooking. At the same time, dielectric heating cooking by the magnetron 6 can be switched or simultaneously performed with the heating operation by the heating coil.

FIG. 4 is a circuit diagram of another embodiment of the heating and cooking apparatus of the present invention, in which the same reference numerals as those in FIGS. 3 and 9 are corresponding components, and detailed description thereof will be omitted.

In the figure, the oven plate 52 is the core 7
2, 73 (one figure in the figure) and heating coils 53, 55 having cores 74, 75 (one figure in the figure), respectively.
And the heating coils 54 and 56 are used for heating. As is apparent from FIGS. 1 and 2, since the heating coils 53 and 55, and 54 and 56 are paired heating coils, the heating coils 54 and 56 are connected by the contact 70.
However, the contact 71 supplies the heating coils 53 and 55 with electric power for the inverter circuit. With such a configuration, the control unit 21 controls the relay contacts 22, 24-2.
6, 61, 70, 71 and control circuits 27, 68 to control the magnetron 6, the heater 11, the heating coil 53 to.
56 heating controls are switched or combined at the same time to realize heating cooking with a heating speed 1.5 to 3 times faster than in the past, and further cooking in a cooking category which was difficult in the past can be realized. To do.

Further, since the heating coils 53 to 56 are constructed by using the magnetic core, it is possible to relatively freely select the generation direction and the generation place of the high frequency magnetic flux generated by the heating coil. In particular, in the case of the heating and cooking device of the present invention for heating the open / close oven plate 52, since the configuration of heating around the outer peripheral portion of the oven plate can be realized relatively easily, heating using the magnetic core is performed. Constructing a coil is extremely effective for improving heating efficiency and suppressing noise due to leakage magnetic flux. That is, by using the magnetic core,
It is possible to prevent generation of unnecessary magnetic flux that may heat the oven wall 5 or the like, or heat the housing 1 to generate radiation noise.

FIG. 5 is a sectional view showing the structure of the heating coil 53, and those having the same reference numerals as those in FIG. 1 are the corresponding structural elements.

The heating coil 53 is composed of a coil 81 wound around a bobbin 80 and a core 72 for efficiently supplying the high frequency magnetic flux generated by the coil 81 to the oven plate 52 as shown by the arrow in the figure. The core 72 has a U-shaped structure. Therefore, the magnetic flux does not form a closed magnetic circuit with the core 72 and the oven plate 52, and the high frequency magnetic flux does not leak to the other portions to inductively heat the oven wall 5 or the like. The oven plate 52 has a lower surface side made of a magnetic material 82 such as magnetic stainless steel, an upper surface side made of a high heat conductive material 83 such as aluminum or copper, and a surface provided with a nonstick material 84 such as fluorine. . The magnetic material 82 is induction-heated by the magnetic flux generated by the core 72, and the generated heat is transmitted to the entire oven plate 52 by the high thermal conductive material 83. Therefore, even with such a heating configuration centering around the outer peripheral portion of the oven dish 52, it is possible to realize highly uniform cooking.

A heat insulating material 85 is provided on the outer peripheral end of the oven dish 52. This heat insulating material 85 prevents the heat generated in the outer peripheral portion of the magnetic material 82 from being conducted to the oven wall 5, so that the heating efficiency of the oven plate 52 is improved and the oven plate 52 is also improved. The temperature control of 52 is also easy because it is separated from the thermal oven 5.

FIG. 6 is a sectional view showing another embodiment of the heating coil 53, and those having the same reference numerals as those in FIG. 5 are the corresponding constituent elements.

The heating coil 53 includes a bypass core 86 in addition to the U-shaped core 72, and is compactly incorporated in the oven wall 5. Since the leakage flux of the coil 81 is effectively transmitted to the magnetic material 82 of the oven dish 52 by the bypass core 86, high efficiency heating is realized without heating the oven wall or the like even with a compact structure. it can.

FIG. 7 is a sectional view showing still another embodiment of the heating coil 53, and those having the same reference numerals as those in FIG. 5 are corresponding components.

The oven plate 52 is made of the high heat conductive material 8 on the upper surface side.
3, a magnetic material 82 provided only on the outer peripheral portion on the lower surface side, and a heat pipe portion 87 that conducts the heat generated by the magnetic material 82 to the high thermal conductive material 83, and the magnetic material 82 on the lower surface side is generated. It is a structure that conducts heat effectively. In this structure, the heat pipe portion 87 can be entirely replaced with the high thermal conductive material 83. Also, the heat insulating material 85 is opened as shown in the figure.
It can also be installed on the bun wall 5 side.

The heating coil 53 preferably has a structure using a magnetic core as shown in FIGS. 5 to 7 in order to effectively use the high frequency magnetic flux, but the heating coil 53 is not limited to this. It can be configured using a flat or flat air core coil. For example, in FIG.
Even if the flat-plate-shaped heating coil 53 is provided below the same, the same effect can be obtained.

With the above-mentioned structure, it is possible to take out freely.
It is possible to heat the pan plate, but it is also possible to share the inverter circuit for supplying the high frequency current to the heating coil and the inverter circuit for driving the magnetron 6. FIG. 8 is a circuit diagram showing this embodiment, and those having the same reference numerals as those in FIG. 3 are corresponding components. Relay contact 70,
The high-frequency current generated by the inverter circuit is supplied to the high-frequency magnetic flux generating means 50 and the heating coil 53 by 71 and 86.
It is possible to drive these heating means with a single inverter circuit by switching and supplying to ~ 56 and the magnetron 6.

[0038]

As described above, the heating and cooking device of the present invention has the following effects.

Since the oven plate is heated by the induction coil heating at least the outer peripheral portion of the oven plate, the oven plate itself is heated. The speed is greatly promoted and frying pan cooking, which is difficult with the conventional configuration, can be performed in the oven. Therefore, it is possible to realize a very easy-to-use heating cooking device with a fast cooking speed and a large number of cooking categories. Furthermore, since the oven plate is heated by a non-contact structure, it is extremely easy to take it out of the oven and install it in the oven.
Therefore, it is possible to provide a convenient heating and cooking apparatus that can be used by moving the oven plate to the dining table as it is, or can be cleaned very easily after use.

Further, by adopting the heating coil structure provided with the magnetic core material, the magnetic flux is effectively guided to the portion of the oven dish to be heated and the components other than the oven dish which should not be heated. It is possible to prevent the magnetic flux from reaching (for example, an oven wall). Therefore, it is possible to realize a heating and cooking device with high heating efficiency and less radiation noise.

By providing a plurality of heating coils, the planar oven can be heated from a plurality of positions on the outer periphery to improve heating uniformity and to uniformly heat food. It is possible to realize a cooking device.

Furthermore, by providing a plurality of heating coils in the vertical direction of the side wall of the oven, the installation position of the oven dish can be changed according to the type of cooking and the height of the food. It can also be used for oven cooking and therefore can be used for both oven cooking and grill cooking. In addition, the cooking speed is fast and the cooking category is greatly expanded, making it extremely easy to use. It is possible to realize a good cooking device.

Further, by providing a high heat conductive material on the upper surface side of the oven plate and a magnetic material on the bottom surface (lower surface) side, efficient induction heating of the bottom surface side and placement on the oven plate are performed. It is possible to realize a heating and cooking device capable of uniformly heating cooked food. In particular, for the configuration in which the outer peripheral portion of the oven dish is induction-heated, the heat generated in the outer peripheral portion is quickly transferred to the central portion, so that the food can be uniformly heated even though the peripheral portion is centrally heated. The device can be realized.

Furthermore, by constructing the oven dish at a predetermined position in the oven via the heat insulating means, the heat radiation from the oven dish can be suppressed and a high heating speed can be obtained.
It is possible to realize a heating and cooking device with excellent cooking performance because it is easy to control the temperature of only the oven plate because it is thermally separated from the oven wall and it is highly accurate. it can.

[Brief description of drawings]

FIG. 1 is a sectional view showing the configuration of a heating and cooking apparatus according to an embodiment of the present invention.

FIG. 2 is a sectional view showing the configuration of a cooking apparatus according to another embodiment of the present invention.

FIG. 3 is a circuit diagram of an embodiment of the heating and cooking apparatus of FIG.

FIG. 4 is a circuit diagram of another embodiment of the heating and cooking apparatus of FIG.

5 is a sectional view of an embodiment of a heating coil of the heating and cooking apparatus of FIG.

6 is a sectional view of another embodiment of the heating coil of the heating and cooking apparatus of FIG.

FIG. 7 is a cross-sectional view of yet another embodiment of the heating coil of the heating and cooking apparatus of FIG.

FIG. 8 is a circuit diagram of yet another embodiment of the heating and cooking apparatus of FIG.

FIG. 9 is a sectional view showing the configuration of a conventional heating and cooking device.

FIG. 10 is a circuit diagram of the conventional cooking device of FIG.

FIG. 11 is a sectional view of a heater portion of the heating and cooking device of FIG.

[Explanation of symbols]

 5 Oven (Oven Wall) 8, 60 Power Converter (High Frequency Power Generator) 52 Oven Plate 53-56 Heating Coil 72-75 Magnetic Core Material (Core) 82 Magnetic Material 83 High Thermal Conductive Material 85 Thermal Insulation Material

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yuji Nakabayashi 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Makoto Shibuya, 1006 Kadoma, Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd. (72) Inventor Kenji Yasui 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (6)

[Claims] 1. An oven for accommodating foods, an freely removable oven plate provided in the oven, and an induction current induced in at least the outer peripheral portion of the oven to guide the oven plate. A heating and cooking device comprising: a heating coil for heating; and a high-frequency power generator that supplies high-frequency power to the heating coil. 2. An oven for storing food, an freely removable oven plate provided in the oven, a heating coil for inductively heating the oven plate with a magnetic core material, A heating and cooking device comprising: a high-frequency power generator that supplies high-frequency power to a heating coil. 3. The cooking apparatus according to claim 1, further comprising a plurality of heating coils. 4. A plurality of oven tray installation positions are provided, and
The heating and cooking device according to claim 3, wherein a plurality of heating coils are provided in the vertical direction of the side wall of the oven. 5. An oven for storing food, an freely removable oven plate provided in the oven, and the oven.
A heating coil for induction heating the oven plate, and a high-frequency power generator for supplying high-frequency power to the heating coil are provided, and a high heat conductive material is provided on the upper surface side of the oven dish, and at least the bottom surface side or the side surface side. A cooking device with a magnetic material provided in one part. 6. An oven for storing food, an freely removable oven plate provided in the oven, and the oven.
A heating coil for induction heating the oven plate and a high-frequency power generator for supplying high-frequency power to the heating coil are provided, and heat insulating means is provided between the oven dish and the oven, and the heat insulating means is provided. A heating and cooking device configured to install the oven plate at a predetermined position in the oven via the above.