JPH06147487A - Heating cooker - Google Patents

Abstract

(57) [Summary] [Object] The present invention relates to a heating cooking device such as a microwave oven, which heats an oven dish by a magnetic flux generated by a heating coil to realize high-speed cooking and expansion of cooking categories. The purpose is to obtain the device. An oven cabinet 7 for storing food, a freely removable oven dish 2 provided in the oven cabinet, a heating coil 8 for inducing an induction current in the oven dish to heat the oven dish by induction, Equipped with a high-frequency generator 60 that supplies high-frequency power to the heating coil, the oven coil is heated directly by the high-frequency magnetic flux of the heating coil to speed up cooking of food, and the category of oven cooking is expanded to improve usability. Greatly improve.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating and cooking device such as a microwave oven for heating an object to be heated such as food by using oven heating, grill heating or dielectric heating.

[0002]

2. Description of the Related Art An example of a conventional cooking device such as a microwave oven will be described with reference to FIGS. FIG. 5 is a block diagram of the microwave oven, and FIG. 6 is a block diagram of the mica heater. In FIG. 5, the inside of the casing 31 is an oven cabinet 3 including an oven top plate 32 in which the food 3 placed on the oven dish 2 is stored, an oven side plate 33, and an oven bottom plate 34.
5, upper and lower mica heaters 36 attached to the oven top plate 32 and the oven bottom plate 34 so as to have a heat transfer relationship, the mica heater 36 and the oven side plate 33.
A heat insulating material 40 is provided in order to prevent the heat from being dissipated.

As shown in FIG. 6, the mica heater 36 has a structure in which a heating wire 37 is wound around a mica plate 41 and further sandwiched and fixed by two mica plates 38 and 39. The mica plate is heated to about 500 ° C.

In the above structure, the electric energy input to the upper and lower mica heaters heats the mica heater 36, the upper mica heater contacts the oven top plate 32, and the lower mica heater contacts the oven bottom plate 34 by contact heat transfer. Heat to about ℃. The flow of heat during cooking in the oven is shown in FIG. The heat 42 in the oven top plate is transferred by convection or radiation to heat the food 3. Further, the heat 43 in the lower heater is transferred to the oven dish 2 by convection or radiation, and the food 3 is heated by heat conduction and contact heat transfer of the oven dish.

[0005]

However, in the above-mentioned conventional structure, the heat generated particularly by the lower mica heater 36 is transmitted to the oven bottom plate 34 as shown in FIG. 7, and is generated from the oven plate 2 which is not directly related to cooking. Heating the air below,
After that, the heat was transmitted to the oven dish 2 and the food 3 was heated, so it took time to transfer the heat, and the rising speed of the temperature of the oven dish 2 was slow. Further, since the air below the oven plate 2 and the oven side plate 33 which are not directly related to cooking are heated, useless heat is consumed. Furthermore, the temperature of the oven plate 2 is set to the mica plate 38, the oven bottom plate 34, or the oven plate 2
Since the temperature of the heating wire 37 becomes lower than the temperature of the heating wire 37 due to the thermal resistance of the lower air layer, the bottom of the food 3 is less likely to be scorched, and high-temperature cooking such as frying (for example, hamburger) is difficult.

Further, in the mica heater as shown in FIG. 6, for example, when the commercial power source is 100 V, the mica plates 38 and 39 which are insulating materials need to have sufficient withstand voltage performance against the voltage, If it is 200 V, even higher pressure resistance is required. Therefore, the mica heater 3 below
The heat energy generated in the heating wire 37 of 6 is transmitted to the oven bottom plate and at the same time to the heat insulating material 39 on the opposite side, and is radiated to the side opposite to the oven cabinet 35 (that is, outside the oven). Not only does the efficiency of heating the air in the interior decrease, but also the casing 31 of the microwave oven.
There is a problem in that the temperature of the outer wall of the housing becomes high, installation cannot be performed in contact with the wall of the room, installation conditions are limited, or there is a risk of burns by touching the outer wall of the housing 31. .

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to realize a safe oven that shortens cooking time and saves energy.

[0008]

The present invention has the following constitution in order to achieve the above object. That is, an oven cabinet for storing food, a freely removable oven dish provided in the oven cabinet, a heating coil for inducing an induction current to induction-heat the oven dish, and a high-frequency power supply to the heating coil. And a high-frequency power generator that operates.

[0009]

According to the present invention, since the high frequency power generator supplies high frequency power to the heating coil to induce an induction current in the oven plate to induce induction heating, the oven plate itself is heated. The heating speed of the food to be cooked is greatly accelerated and frying pan cooking, which is difficult with the conventional configuration, becomes possible. Furthermore, since the oven dish is heated by the non-contact structure, it is extremely easy to remove it from the oven and install it in the oven, and it is easy to move and clean the oven dish.

[0010]

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, and the same reference numerals as those in FIG. 4 are the corresponding constituent elements.

In FIG. 1, reference numeral 2 denotes an oven plate made of a magnetic material which is removably taken out from an oven chamber 7 on which a food 3 which is an object to be heated is placed.
Reference numeral 8 denotes a heating coil for inductively heating the oven plate 2, which is provided on the oven side plate portion 5 in a single or plural number and is configured to heat the oven plate 2 from the side. In the present embodiment, since the heating coil 8 is located on the side of the oven plate, the heating coil 8 does not get in the way when the oven plate is taken in and out, and the oven plate can be easily moved and cleaned.

FIG. 2 is a sectional view showing the construction of another embodiment of the present invention, in which the same reference numerals as those in FIGS. 1 and 4 represent the corresponding constituent elements.

In FIG. 1, reference numeral 2 denotes an oven dish which is constructed so as to be taken out from an oven chamber 7 on which a food product 3 which is an object to be heated is placed. Reference numeral 8 denotes a heating coil for inductively heating the oven plate 2, which is provided in the oven bottom plate 6 in a single or plural number and is configured to heat the oven plate 2 from below. In the present embodiment, since the heating coil 8 can heat the bottom surface of the oven plate, the heating area becomes large,
Uneven heating is less likely to occur.

FIG. 3 is a sectional view showing the construction of another embodiment of the present invention, in which the same reference numerals as those in FIGS. 1 and 4 represent the corresponding constituent elements.

In the figure, reference numeral 2 is an oven dish which is constructed so as to be taken out from an oven chamber 7 on which a food 3 which is an object to be heated is placed. Reference numeral 8 denotes a heating coil for inductively heating the oven plate 2, which is provided on the oven top plate portion 8 in a single or plural number as shown in the figure, and is configured to heat the oven plate 2 from above. In the present embodiment, since the heating coil 8 heats the bottom surface of the oven dish 2, the heating area is large and uneven heating is less likely to occur.

FIG. 4 is a circuit diagram of the heating device shown in FIGS. 1 to 3, and those having the same reference numerals represent corresponding components. In FIG. 4, the high frequency power generator 60 receives power from the relay contact 61 controlled by the controller 72, and receives the diode bridge 62, the inductor 63, the capacitors 64 and 65,
An inverter circuit including a transistor 66, a diode 67, a control circuit 68, and a current transformer 69 performs a high frequency switching operation. A high frequency current is supplied to the heating coil 8 when the relay contacts 71 and 72 are closed, and the oven dish 2 is heated by the induced current.

1 to 4, since the microwave oven of the present invention directly heats the oven dish on which the food is placed, the oven cabinet below the oven dish which is not necessary for heating the food is provided. No need to heat, the oven dish can be quickly brought up to the high temperatures needed for cooking. Therefore, the heating speed of food is significantly faster than that of a conventional microwave oven. According to the experiments by the inventors, the heating speed of the microwave oven of FIG. 1, FIG. 2 or FIG. 3 with respect to the conventional microwave oven of FIG. 5 was reduced by 30% to 70% although it varied depending on the food. That is, according to the food, it is possible to realize an oven range capable of speed cooking in a short time, which is 1/3 or less of the conventional range. Further, high-temperature cooking (for example, hamburger etc.) such as frying pan cooking, which was difficult in the past, can be easily performed.

Further, since cooking in which the oil is scattered is possible in the oven, it is possible to realize a new heating cooker which does not stain the kitchen.

Furthermore, since the oven plate does not require a connecting means such as wiring for heating, it is easy to clean, has no contact defects, etc. and has high durability. In addition, after cooking, it is easy to carry it to a table or the like as it is, and it is possible to realize a new cooker directly connected to the table.

[0021]

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

(1) Since the oven plate itself is heated by the configuration in which the induction current is induced in the oven dish by the heating coil, the oven dish itself is heated, so that the heating speed of the cooking object on it is greatly accelerated. At the same time, frying pan cooking, which is difficult with the conventional configuration, becomes possible. Therefore, it is possible to realize a very easy-to-use cooking device with a high cooking speed and a large number of cooking categories. Furthermore, since the oven dish is heated by the non-contact structure, there is no contact failure and a highly durable cooking device can be realized.

(2) In the structure in which the heating coil is provided on the oven side plate portion, the heating coil does not come into contact with food or the like when the oven plate is taken in or out, and the protruding amount of the heating coil can be small. In addition to the above effects,
It is possible to realize a heating and cooking device that is easy to put in and take out the oven plate and clean it.

(3) In the configuration in which the heating coil is provided on the oven top plate or the oven bottom plate, in addition to the above effects, the heating coil heats the bottom surface of the oven plate.
It is possible to realize a heating cooking device in which the heating area is increased and uneven heating is less likely to occur.

[Brief description of drawings]

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

FIG. 4 is a circuit diagram of an embodiment of a heating coil of the heating and cooking apparatus of the present invention.

FIG. 5 is a cross-sectional view of the configuration of a conventional heating and cooking device.

FIG. 6 is a perspective view of a conventional mica heater.

FIG. 7 is a heat flow diagram in an oven of a conventional heating and cooking device.

[Explanation of symbols]

 2 Oven dish 3 Object to be heated 4 Top plate 5 Side plate part 6 Bottom plate part 7 Oven chamber 8 Heating coil 60 High frequency power generator

 ─────────────────────────────────────────────────── ─── 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 (3)

[Claims] 1. An oven cabinet comprising a top plate, side plates, and a bottom plate for containing an object to be heated, a freely removable oven plate on which the object to be heated is placed, and heating for inducing an induction current to induction-heat the oven plate. A heating and cooking device comprising a coil and a high-frequency power generator that supplies high-frequency power to the heating coil, the heating coil being provided on the oven side plate, and induction heating an oven dish. 2. An oven cabinet composed of a top plate, side plates, and a bottom plate for containing an object to be heated, a freely removable oven plate on which the object to be heated is placed, and heating for inducing an induction current to induction-heat the oven plate. A heating and cooking device comprising a coil and a high-frequency power generator that supplies high-frequency power to the heating coil, the heating coil being provided in the oven top plate portion, and induction heating an oven dish. 3. An oven cabinet comprising a top plate, side plates, and a bottom plate for containing an object to be heated, a removable oven plate on which the object to be heated is placed, and heating for inducing an induction current to induction-heat the oven plate. The heating cooker according to claim 1, further comprising a coil and a high-frequency power generator that supplies high-frequency power to the heating coil, wherein the heating coil is provided on the oven bottom plate portion to induction-heat an oven dish.