JPH07226286A - Electric cooker - Google Patents

Abstract

(57) [Abstract] [Purpose] It is an object of the present invention to provide an electric heating cooker capable of simplifying a structure and simplifying an assembling process, performing uniform heating, and improving thermal efficiency and reducing power consumption. . [Structure] In an electric heating cooker in which a heating element 3 for heating the top plate 1 by electric heat is provided inside a body 2 on which a top plate 1 for cooking is placed, the top inside the body 2. A refractory heat insulating board 4 is arranged on the back surface of the plate 1 so as to face each other, and a heating element 3 composed of a heating wire 5 is provided at a predetermined distance along the heat insulating board 4 and the top plate 1. It is arranged in.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric heating cooker which cooks a cooking top plate mounted on a body by heating it with a heating element disposed inside the body.

[0002]

2. Description of the Related Art This type of electric heat cooker includes a so-called smooth top type in which a pan, a frying pan, etc. are placed on a flat plate having a smooth surface for heating and cooking. Even if the pan overflows during cooking, it can be easily removed by simply wiping or washing the cooking top plate.

In the conventional smooth top type electric cooker, as shown in FIG. 3, a heating element is provided inside a stainless steel body 2 on which a cooking top plate 1 formed of heat-resistant crystallized glass is mounted. Two straight tube type halogen lamps 21 are provided as 3, and the halogen lamp 21 serves as a main heater for heating the top plate 1.

The halogen lamp 21 has the advantages that it is excellent in rapid heating, can be controlled in a wide range from low temperature to high temperature, and has a long life, but on the other hand, it has only two halogen lamps 21 and 21. In heating, the heat is concentrated on the surface immediately above the lamp, and there is a drawback that uniform heating cannot be performed. To solve this difficulty,
It is conceivable to increase the number of halogen lamps 21 to evenly heat the entire surface of the top plate, but the halogen lamps are expensive, and if the number of halogen lamps 21 is increased, the price of the electric heating cooker becomes very high. Will end up.

Therefore, an annular coil heater 22 made of an inexpensive nickel chrome wire is provided under the halogen lamp 21 as an auxiliary heater, and the halogen lamp 21 as the main heater is used at the same time to prevent uneven heating. There is.

[0006]

However, since this electric heating cooker has a large number of parts and a complicated structure, the coil heater 22 is laid inside the body 2 and wiring is performed when assembling. After that, it is necessary to further incorporate two halogen lamps 21 on the upper side thereof, so that the assembly process is complicated and the manufacturing cost is increased. Further, in order to light the halogen lamp 21, a special power supply circuit with high cost is required, which is one of the factors that make this kind of electric heating cooker expensive. Further, since the halogen lamp 21 converts light energy into heat, energy loss is large and thermal efficiency is poor, so that there is a problem that power consumption is large.

Therefore, according to the present invention, the structure can be simplified to simplify the assembling process, and moreover, uniform heating can be performed, and
It is a technical subject to provide an electric cooker capable of improving thermal efficiency and reducing power consumption.

[0008]

In order to solve this problem, in the electric heating cooker according to the present invention, a heating element for heating the top plate by electric heat is provided inside the body on which the cooking top plate is mounted. In the provided electric heating cooker, inside the body, a refractory heat insulating board that overlaps with the back surface of the top plate in a face-to-face state is arranged, and along the space between the heat insulating board and the top plate. The heating elements composed of heating wires are arranged at predetermined intervals.

[0009]

The electric heating cooker according to the present invention is a heating element comprising a refractory heat insulating board which overlaps the back surface of a cooking top plate in a face-to-face relationship, and a heating wire arranged between the heat insulating board and the top plate. Since the main component is, the number of parts can be significantly reduced compared to the conventional case where a halogen lamp and a coil heater are installed side by side in the body, and the assembly process is simplified because the structure is extremely simple. Therefore, the manufacturing cost can be significantly reduced.

Further, heating elements made of heating wires are arranged at a predetermined interval along the space between the heat insulating board and the top plate,
Moreover, since the heat insulation board overlaps with the back surface of the top plate in a face-to-face relationship, the heat generated from the heating element does not easily escape from the bottom and side surfaces of the cooker, and the heat is evenly and efficiently transferred to the top plate. In addition, heating unevenness does not occur and power consumption can be reduced.

Further, in the electric heating cooker according to the present invention, an expensive halogen lamp is not required, and it is not necessary to provide a special power supply circuit for lighting the halogen lamp, so that a smooth top type electric heating cooker is provided. It is possible to reduce the price.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below based on the embodiments shown in the drawings. FIG. 1 is a sectional perspective view showing an embodiment of the electric heating cooker according to the present invention, and FIG. 2 is a schematic sectional view showing another embodiment. In the figure, reference numeral 1 denotes a cooking top plate that is fired with cordierite (MAS), which is a type of low-expansion ceramics, and is fitted onto the upper surface of a stainless steel container 2.

Inside the body 2, a ceramic fire-resistant heat-insulating board 4 having a heating wire 5 embedded in the surface layer portion thereof.
Are attached to the back surface of the top plate 1 so as to overlap with each other in a face-to-face state.

The method of manufacturing the ceramic heat insulating board 4 used in this embodiment will be described below.
Light weight, heat-resistant, and excellent in heat-insulating alumina-silica ceramic fibers are filled in a mold by a vacuum extrusion molding method, and concave grooves for embedding the heating wire 5 are provided at intervals of 10 mm and a thickness of 30 mm. Of ceramic fiber blanket. Then, in the groove 6 of the ceramic fiber blanket, coiled iron, chromium,
After disposing the aluminum wire, the ceramic fiber is packed in the groove 6 so that a part of the heating wire 5 is exposed on the surface, and the outer peripheral surface of the blanket is hardened with a ceramic binder to form a hardened layer 7. Thus, the heat insulating board 4 having both heat resistance and heat insulating property and integrally embedded with the heating wire 5 is completed.

Insulation board 4 manufactured in this way
The embedded heating wire 5 is electrically connected to the temperature adjusting mechanism 8 and incorporated in the body 2. In the conventional electric heating cooker, both the halogen lamp and the coil heater having many parts are complicatedly assembled. In contrast to the fact that the heat insulating board 4 integrated with the heating element 3 is merely attached to face the back surface of the top plate 1 in this embodiment, the assembly process is remarkably simplified. Therefore, the manufacturing cost can be significantly reduced.

On the other hand, in another embodiment shown in FIG. 2, when the groove 6 is formed in the ceramic fiber blanket in the process of manufacturing the heat insulating board 4 described above, the outer peripheral surface of the groove is hardened with the ceramic binder. The hardened surface 7 is formed, and then the desired heating wire 5 is inserted in the concave groove 6. At this time, the upper part of the heating wire 5 may be left open or may be sealed with a heat conductive ceramic or the like.

The temperature adjusting mechanism 8 in the embodiment is
The chromel-alumel thermocouple is used as a temperature sensor, and the heating wire 5 can be adjusted to a desired temperature by adjusting the current of the thyristor based on the detection signal from the temperature sensor. It is possible to generate a high temperature of about 1200 ° C.

The electric heating cooker according to the present invention having the above-described structure wipes or cleans the surface of the cooking top plate 1 in the same manner as in the conventional case, even if the pan or frying pan overflows during cooking. The cordierite that forms the top plate 1 has excellent heat resistance, thermal shock resistance, and mechanical strength, so it can be easily cleaned by simply removing it. Even if it is damaged, it does not crack and is highly durable. As the material for forming the top plate 1, in addition to the cordierite according to this embodiment, heat-resistant crystallized glass, low-expansion ceramics such as lithia or quartz, or metal such as stainless steel can be used.

Further, the heat insulating board 4 is the top plate 1
The heating wires 5 are attached so as to overlap each other on the back surface of the heating element 5 and face each other, and the heating wires 5 are arranged at a predetermined interval along the heat insulating board 4 and the top plate 1. Due to the heat insulating effect of the heat insulating board 1, it is difficult to escape from the bottom and side surfaces of the body 1, and heat can be efficiently and evenly conducted to the top plate 1, and even heating can be performed, and power consumption is reduced. Less economical.

As the heating wire 5, in addition to the iron / chromium / aluminum wire of the embodiment, nickel-chrome wire, nickel /
It is possible to use chrome / iron wire, nickel / chrome / aluminum wire, etc., and it is also possible to use a so-called ceramic heater. Further, the heat insulating board 4 is not limited to the case of using ceramic fibers as in this embodiment, but may be formed of other fire resistant heat insulating material such as mica ceramics.

If the cooking top plate 1 is formed into a plate shape or a pan shape and is detachably fitted into the body 2, a so-called hot plate is directly cooked or baked on the top plate 1. Will be able to.

[0022]

As described above, in the electric heating cooker according to the present invention, the number of parts can be greatly reduced and the structure can be greatly reduced as compared with the conventional one in which a halogen lamp and a coil heater are provided as a heating element. Since it is also simple, the assembly process is simplified, and the manufacturing cost can be significantly reduced, which is an excellent effect.

Further, it is possible to perform uniform heating without providing a halogen lamp and a coil heater as in the conventional case, and it is possible to obtain high thermal efficiency because heat is difficult to escape from the bottom and side surfaces due to the heat insulating property of the heat insulating board. Therefore, there is an effect that power consumption can be reduced.

[Brief description of drawings]

FIG. 1 is a sectional perspective view showing an embodiment of an electric heating cooker according to the present invention.

FIG. 2 is a schematic sectional view showing another embodiment of the electric heating cooker according to the present invention.

FIG. 3 is a plan view showing the internal structure of a conventional smooth top type electric heating cooker.

[Explanation of symbols]

 1 ... Top plate for cooking 2 ... Body 3 ... Heating element 4 ... Insulation board 5 ... Heating wire

Claims (1)

[Claims] 1. An electric heating cooker in which a heating element (3) for heating the top plate (1) with electric heat is provided inside a body (2) on which the cooking top plate (1) is mounted. Inside the body (2), a fire-resistant heat insulating board (4) is provided which overlaps the back surface of the top plate (1) in a face-to-face manner, and the heat insulating board (4) and the top plate (1) are arranged. ) And a heating element (3) composed of a heating wire (5) are arranged at a predetermined interval.