JPH11237054A - Electric stove - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric stove that is used as electric heating equipment and has a large amount of radiation energy. SOLUTION: In an electric stove, an electric heating element 8 where a linear carbon resistance electric heating element 7 is provided in a pipe body 6 can be energized. A carbon material has an infrared-ray emissivity of 78%-84% on the surface as compared with 30%-39% in a former tungsten wire, thus increasing the amount of radiation energy by providing the linear carbon resistance electric heating element 7 in the electric stove.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric stove used as an electric heater.

[0002]

2. Description of the Related Art Conventionally, as shown in FIGS. 6 and 7, an electric stove of this type is provided with a reflector 2 in a stove body 1 having an open front surface, and a crystallized glass or a glass plate is provided in front of the reflector. Heat is radiated by energizing a heating element 5 in which a heating wire 4 in which a tungsten metal wire is circularly wound in a coil shape is inserted into a tube 3 formed of quartz.

[0003]

However, in the above-mentioned conventional electric stove, since the heating wire 4 of the heating element 5 is formed of a tungsten metal wire, the surface has an infrared emissivity of 30% to 39%. Since the amount of energy is small, it has a problem that it cannot be used for an electric stove having a large amount of radiant energy from the heating element 5.

[0004]

According to the present invention, a straight carbon-based resistance heating element is provided in a tube in front of a reflector provided in a stove body having an open front surface. The heating element disposed can be energized.

According to the above invention, an electric stove having a large amount of radiant energy from the heating element can be realized.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention comprises a stove body having an open front surface, a reflector provided in the stove body, and a heating element in front of the reflector, wherein the heating element has a linear shape. It is an embodiment to provide a carbon-based resistance heating element.

[0007] Since the carbon-based material has a surface with an infrared emissivity of 78% to 84% and a large amount of radiant energy, an electric stove having a large amount of radiant energy from the heating element can be realized.

[0008]

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

(Embodiment 1) FIG. 1 is a side sectional view of an electric stove according to Embodiments 1, 2, and 3 of the present invention. FIG. 2 is a cross-sectional view of a heating element of an electric stove according to the first, second, and third embodiments. FIG. 3 is a perspective view of the carbon-based resistance heating element of the electric stove according to the first embodiment.

In FIGS. 1, 2 and 3, FIG.
Components having the same functions as the components shown in FIG. 7 are denoted by the same reference numerals.

1, 2 and 3, an electric stove is provided with a reflector 2 in a stove body 1 having an open front, and a circular cross section in a tubular body 6 at a position in front of the reflector. It comprises a heating element 8 provided with a linear carbon-based resistance heating element 7. Reference numeral 7 denotes a carbon-based resistance heating element, and reference numeral 6 denotes a tube that covers the outer periphery of the carbon-based resistance heating element 7. The tube 6 is made of a transparent, opaque or translucent material having high heat resistance, such as a quartz tube or a crystallized glass tube, and has a carbon-based resistance heating element 7 disposed inside. The carbon-based resistance heating element 7 is made of a carbon-based material including carbonaceous and graphitic materials and is manufactured by a method of manufacturing a carbon heating element (disclosed in Japanese Patent Publication No. 3-67316) and a method of manufacturing a carbon-based coiled resistance heating element. (Disclosed in Japanese Patent Publication No. 64-1914), the cross section of which is made circular or polygonal, and which is entirely formed into a straight line. The end portion 9 of the linear carbon-based resistance heating element 7 is connected to a coil-shaped connection wire 10 so as to partially have a spring property by a connection pipe 11, and the connection wire 10 is connected to a foil 12. , One side of the foil 12 is an extraction line 13
Is connected to The tube 6 in which the linear carbon-based resistance heating element 7 is located is replaced with air, and an inert gas is melted at the foil 12 at both ends of the tube 6 to form a sealing portion 14. In addition, a linear carbon-based resistance heating element 7 is held to form a heating element 8.

In the first embodiment, a carbon-based resistance heating element 7a having a circular cross section is used as the linear carbon-based resistance heating element 7 as shown in FIG.

Next, the operation and action will be described. The carbon-based material has an infrared emissivity of 78% to 84% on the surface, has a larger radiant energy than tungsten, and is excellent in a non-oxidizing atmosphere without melting and deformation. In order to exhibit heat resistance and corrosion resistance and to exhibit electrical conductivity close to that of a metal, when the lead wire 13 exposed to the outside of the tube 6 is energized, the linear carbon-based resistance heating element 7 generates heat and emits radiant energy. Since the heating element 8 has the carbon-based resistance heating element 7a having a circular cross section in the tube 6 in the first embodiment, it is possible to realize an electric stove in which the radiant energy of the heating element 8 is large. it can.

Embodiment 2 FIG. 4 is a perspective view of a carbon-based resistance heating element of an electric stove according to Embodiment 2 of the present invention.

The difference from the first embodiment is that the tube 6 is constituted by a heating element 8 in which a carbon-based resistance heating element 7b having a semicircular cross-section and being entirely linear is disposed.

The parts having the same reference numerals as in the first embodiment are the parts having the same structure and the same functions, and the description thereof will be omitted.

Next, the operation and operation will be described. The heating element 8 is a tube-shaped body provided with a carbon-based resistance heating element 7b having a semicircular cross section, and the heating element 8 has a large amount of radiant energy. An electric stove can be realized.

Embodiment 3 FIG. 5 is a perspective view of a carbon-based resistance heating element of an electric stove according to Embodiment 3 of the present invention.

The difference from the first embodiment is that a carbon-based resistance heating element 7 having a square cross section in the
The point is that the heating element 8 is provided with the heating element c.

The parts having the same reference numerals as in the first embodiment are the parts having the same structure and the same functions, and the description thereof will be omitted.

The operation and function of the heating element 8 will now be described. The heating element 8 is a tube 6 having a square cross section and a generally linear carbon-based resistance heating element 7c. An electric stove with a large amount of radiant energy can be realized.

In the first, second, and third embodiments of the present invention, the cross section of the linear carbon-based resistance heating element 7 is circular, semicircular, or square. The shape can be similarly implemented without limiting the shape. Further, the number of the heating elements 8 is one, but a plurality of heating elements can be similarly implemented. Further, the heating element 8 is configured in the stove body 1 in the horizontal direction, but the heating element 8 may be configured in the vertical direction and the oblique direction in the same manner.

[0023]

As is apparent from the above description, according to the present invention, since a heating element in which a linear carbon-based resistance heating element is disposed in a tube can be energized, the carbon-based resistance heating element can be energized. An electric stove having a high radiation efficiency and a large amount of radiation energy can be realized.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a common electric stove according to Embodiments 1, 2, and 3 of the present invention.

FIG. 2 is a sectional view of a heating element of the electric stove.

FIG. 3 is a perspective view of a carbon-based resistance heating element having a circular cross section according to the first embodiment of the present invention.

FIG. 4 is a perspective view of a carbon-based resistance heating element having a semicircular cross-sectional shape according to a second embodiment of the present invention.

FIG. 5 is a perspective view of a carbon-based resistance heating element having a square cross section according to a third embodiment of the present invention.

FIG. 6 is a side sectional view of a conventional electric stove.

FIG. 7 is a sectional view of a conventional heating element.

[Explanation of symbols]

 5, 8 Heating element 7 Linear carbon-based resistance heating element 7a Carbon-based resistance heating element having a circular cross-sectional shape 7b Carbon-based resistance heating element having a semi-circular cross-section 7c Carbon-based resistance heating element having a square cross-section 9 End Part 10 Connection line 11 Connection tube 12 Foil 13 Extraction line 14 Sealing part

Claims (1)

[Claims] 1. A stove body having an open front surface, a reflector provided in the stove body, and a heating element in front of the reflector, wherein the heating element has a straight carbon-based material in a tube. An electric stove comprising a resistance heating element.