JP2001349557A - Electric stove - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric stove enabling increase of the quantity of radiant energy of a heating body and compact constitution thereof. SOLUTION: A carbon-series resistive heating body 1a formed in the shape of comb teeth substantially, disposed in a tubular body 4 and so constituted that it can be energized is provided in front of a reflecting plate 3 provided in a stove main body of which the front is open. The emissivity of the surface of the heating body is high and the quantity of radiant energy can be increased, while a heating wire does not need to be coiled. By forming the heating body in the shape of comb teeth substantially, the heating body 1a being long can be disposed in the short tubular body. Accordingly, the electric stove enabling compact constitution of the heating body can be realized.

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 for an electric heater.

[0002]

2. Description of the Related Art Conventionally, an electric stove of this type is provided with a reflector 3 in a stove body 2 having an open front surface as shown in FIG. As shown in FIG. 11, the heating element 15 is provided in a tube 4 made of crystallized glass or quartz.
The heating wire 17 is formed by winding a heating wire 16 made of an alloy such as 1 or Ni-Cr or a metal body such as tungsten in a coil shape. Since the heating wire 16 is formed of a metal body, the emissivity of the surface of the heating wire 16 is low and the amount of radiant energy is small. Makes up for the amount of radiant energy. The heating wire 17 is inserted into the tube 4 made of crystallized glass or quartz, and electricity is supplied to the heating wire 17 from the lead wire 8a of the heating wire 17 protruding from both ends of the tube 4, thereby causing the heating wire 17 to generate heat. 4 to radiate heat into the air.

[0003]

However, in the conventional electric stove of the prior art, the outer diameter of the heating element 15 is large because the tube diameter of the tube 4 corresponding to the winding diameter of the heating wire 17 is required. In order to further increase the amount of radiant energy,
The surface area of the heating wire 16 must be increased by increasing the winding diameter of the heating wire 17 or increasing the length of the heating wire 17. Therefore, when the winding diameter of the heating wire 17 is increased, the tube diameter of the tube 4 is increased, and when the length of the heating wire 17 is increased, the length of the tube 4 must be increased. There is a problem that an electric stove that can make the heating element 15 compact cannot be realized.

Further, since the heating wire 17 of the heating element 15 is formed of a metal body, there is a problem that an electric stove having a low emissivity on the surface of the heating wire 17 and a large amount of radiant energy cannot be realized.

[0005]

In order to solve the above-mentioned problems, the present invention provides a stove body having an open front surface, a reflector provided in the stove body, and a heating element in front of the reflector. The heating element has a carbon-based resistance heating element and a tube covering the outer periphery thereof, and the carbon-based resistance heating element is formed in a substantially comb-like shape and disposed in the tube. An electric stove characterized by being capable of being energized.

According to the above invention, the heating element uses a carbon-based resistance heating element as a heating wire, and has a high surface emissivity and a large amount of radiant energy. By forming the system-based resistance heating element in a substantially comb-tooth shape, a long carbon-based resistance heating element can be disposed in a short tube. Therefore, the heating element of the electric stove can be made compact.

[0007]

DETAILED DESCRIPTION OF THE INVENTION 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 is made of a carbon-based material. It has a resistance heating element and a tube covering the outer periphery thereof, wherein the carbon-based resistance heating element is formed in a substantially comb-like shape and arranged in the tube so as to be able to conduct electricity.

Since the heating element uses a carbon-based resistance heating element, it has a high emissivity on the surface and a large amount of radiant energy. By forming the heating element in a tooth shape, a long carbon-based resistance heating element can be disposed in a short tube, and an electric stove in which the heating element can be made compact can be realized.

The heating element has a carbon-based resistance heating element and a tube that covers the outer periphery of the heating element. The carbon-based resistance heating element is formed in a meandering shape, is disposed in the tube, and is energized. It is configured as possible.

By forming the carbon-based resistance heating element in a meandering shape, it is possible to arrange a long carbon-based resistance heating element in a short tube, thereby making the heating element compact. Electric stove that can be realized.

Further, the heating element includes a plurality of carbon-based resistance heating elements, and a connector for electrically and mechanically connecting the carbon-based resistance heating elements.

The heating element electrically and mechanically connects one end of the carbon-based resistance heating element with a connecting body to form a substantially comb-shaped or meandering heating element unit. Therefore, it is possible to realize an electric stove that can easily select various linear carbon-based resistance heating elements and easily form various substantially comb-shaped or meandering heating element units.

Furthermore, at least a part of the carbon-based resistance heating element is a carbon-based resistance heating element having a different heating temperature.

Further, since the carbon-based resistance heating element having at least a part of the inside of the tube and having a different heating temperature is used, an electric stove capable of obtaining radiant energy of different infrared wavelengths with one tube without changing the amount of radiant energy is provided. realizable.

Further, at least a part of the carbon-based resistance heating element has a different output.

[0016] An electric stove that can increase heat radiation at a necessary place and reduce heat radiation at an unnecessary place can be realized.

Further, a heating element in which at least a part of the carbon-based resistance heating element has a different sectional area is provided.

Further, it is possible to realize an electric stove that can obtain different heating temperatures and outputs with one tube.

Further, at least a part of the carbon-based resistance heating element has a different length.

Further, an electric stove that can obtain different heat generation temperatures and outputs with one tube can be realized.

Further, at least a part of the carbon-based resistance heating element has a different sectional shape.

Further, when different heat generation temperatures and outputs can be obtained with one tube, an electric stove that can have directivity in a heat radiation direction can be realized.

[0023]

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, 3, 4, and 5 of the present invention. FIG. 2 is a cross-sectional view of the heating element according to the first embodiment. FIG. 3 is a sectional perspective view of the heating element of the first embodiment.

1, 2 and 3, the electric stove has a reflector plate 3 provided in a stove body 2 having an open front surface, and a carbon-based resistance heating element 1a is disposed in a tube 4 at a position in front of the reflector plate. This is a configuration in which a heating element 1 that can be energized is provided. The tube 4 of the heating element 1 is formed of a high heat-resistant transparent, opaque, translucent material such as quartz or crystallized glass. The carbon-based resistance heating element 1a of the heating element 1 is made of a carbon-based material including carbonaceous and graphitic materials by a method for manufacturing a carbon heating element (Japanese Patent Publication No.
No.-67316) and a method of manufacturing a carbon-based coil-shaped resistance heating element (Japanese Patent Publication No. 64-1914) in a U-shape (substantially comb-teeth shape). At both ends of the carbon-based resistance heating element 1a, a connection line 5 and a connection pipe 6 each having a coil shape so as to partially have a spring property are connected, and the connection line 5 is connected to the foil 7 and further connected to the foil 7. One side is connected to an extraction line 8. The U-turn portion of the carbon-based resistance heating element 1 a is fixed by a fixing plate 10 so as not to move in the tube 4. The tube 4 in which the carbon-based resistance heating element 1a is disposed replaces the inside air with an inert gas, and melts both ends of the tube 4 to form a sealing portion 9, thereby forming an inert gas. Is sealed in the tube 4. When the sealing portion 9 is formed, the foil 7 is simultaneously fixed in the sealing portion 9 so as to hold both ends of the carbon-based resistance heating element 1a.

Next, the operation and function will be described. Since the carbon-based material exhibits excellent heat resistance and corrosion resistance without melting and deforming in a non-oxidizing atmosphere, and exhibits electrical conductivity close to that of metal, the pipe 4 The carbon-based resistance heating element 1a generates heat by supplying electricity to the extraction wire 8 exposed to the outside, and radiates radiant energy. Since the long portion of the carbon-based resistance heating element 1a is not a coil but a straight line, the outer diameter of the tube 4 does not increase even if a plurality of the carbon-based resistance heating elements 1a are located in the tube 4, and the carbon-based resistance heating element 1a Since the U-shaped U-turn is formed, the length of the tube 4 is also reduced, and an electric stove with a compact heating element 1 can be realized.

Further, since the take-out wire 8 comes out only from the sealing portion 9 on one side, it is possible to realize an electric stove in which the wire processing space is halved.

Further, since the connection wire 5 has a part of spring property, the shock to the carbon-based resistance heating element 1a is weakened even when an external force is applied, so that an electric stove which is strong against vibration and shock can be realized.

(Embodiment 2) FIG. 4 is a sectional view of a heating element according to Embodiment 2 of the present invention.

The difference from the first embodiment is that the elongated portion 11 of the carbon-based resistance heating element 1b of the heating element 1 projects in a comb shape with the U-turn section 12 as a root. Further, each long portion 1 of the carbon-based resistance heating element 1b for preventing mutual contact of the connection wires 5 is provided.
The connecting wire 5 and the connecting pipe 6 are located at positions where the end portions of the
Is composed.

The components having the same reference numerals as in the first embodiment have the same structure, and the description is omitted. Next, the operation and operation will be described. In the heating element 1, one of the three lead wires 3 exposed to the outside of the tube 4 is used as a common conducting wire, and the power supply to the remaining two lead wires 8 is increased or decreased. As a result, the energization state of the carbon-based resistance heating element 1b in one tube 4 changes, and an electric stove that can change the output with a compact tube 4 can be realized as in the first embodiment.

Further, since the carbon-based resistance heating element 1b has a high emissivity, the radiant energy from the surface increases, and an electric stove that can increase the radiation efficiency can be realized.

In the second embodiment, the shape of the carbon-based resistance heating element 1b of the heating element 1 is shown as a plane, but as shown in FIG. Even if the unit 11 is arranged, an electric stove that can obtain the same operation and action can be realized.

Further, the carbon-based resistance heating element 1b of the heating element 1
Since the number of the long portions 11 can be any number as long as it can be arranged in the tube 4, an electric stove whose output can be easily changed can be realized.

(Embodiment 3) FIG. 6 is a sectional view of a heating element according to Embodiment 3 of the present invention. The difference from the first embodiment is that the first embodiment
In the third embodiment, the carbon-based resistance heating element 1a of the heating element 1 is formed in a comb shape, whereas the carbon-based resistance heating element 1c of the heating element 1 in the third embodiment is formed in a meandering shape. .

The components having the same reference numerals as in the first embodiment have the same structure, and the description is omitted. Next, the operation and the operation will be described. The number of the elongated portions 11 of the carbon-based resistance heating element 1c of the heating element 1 which is contained in the tube 4 is larger than that of the elongated portion of the carbon-based resistance heating element 1a of the first embodiment. There are many. That is, since the carbon-based resistance heating element 1c is disposed longer, it is possible to realize an electric stove capable of obtaining a larger radiant energy while keeping the tube 4 of the heating element 1 in a compact shape.

(Embodiment 4) FIG. 7 is a sectional view of a heating element according to Embodiment 4 of the present invention. The difference from the first embodiment is that the heating element 1
The carbon-based resistance heating element 1d is formed in a linear shape, and a connection line 5 and a connection pipe 6 are connected to one end of the plurality of carbon-based resistance heating elements 1d, respectively. The other end is connected to the connecting body 13 so that each is integrally connected.
To form a heating element unit 14. Further, the connection body 13 has a function of preventing movement of the carbon-based resistance heating element 1d in the pipe body 4.

The components having the same reference numerals as in the first embodiment have the same structure, and the description is omitted. Next, the operation and action will be described. The carbon-based resistance heating element 1a in the first embodiment must be formed into the shape by a dedicated mold, but the carbon-based resistance heating element 1d may have the same linear shape. In the second and third embodiments, the same operation and action can be obtained by forming the heating unit by connecting the carbon-based resistance heating element 1d by the connection body 13. That is, since various heating element units can be formed by connecting the carbon-based resistance heating element 1d and the connection body 13, the production efficiency as the heating element is improved. Electric stove can be realized.

(Embodiment 5) FIG. 8 is a sectional view of a carbon-based resistance heating element according to Embodiment 5 of the present invention. 9 (a), (b),
(C), (d) is a perspective view showing a cross-sectional shape of the carbon-based resistance heating element.

The difference from the first to fourth embodiments is that at least one of the long portions 11 of the carbon-based resistance heating element 1a of the heating element 1
The above configuration is provided with the elongated portion 11a of the carbon-based resistance heating element 1e having a different cross-sectional shape and set to a different heating temperature and output.

The components having the same reference numerals as in the first embodiment have the same structure, and the description is omitted. Next, an operation and an operation will be described. Since the long portion 11a of the carbon-based resistance heating element 1e is simultaneously formed so as to have a different cross-sectional shape from that of the carbon-based resistance heating element 1a, the heating temperature and the heating temperature and The output can be changed, and when electricity is supplied from the lead wire 8, the carbon-based resistance heating element 1a emits infrared and radiant energy having a different wavelength from that of the carbon-based resistance heating element 1a. Thus, an electric stove that can emit infrared light and radiant energy of different wavelengths in a compact shape can be realized.

The long portion 11 of the carbon-based resistance heating element 1e
a, the sectional shape of which is changed, for example, as shown in FIGS.
As shown in (d), the cross section has a quadrangular, semicircular, or triangular shape having a plane portion. This makes it possible to realize an electric stove in which the radiation direction of infrared rays can be changed by changing the direction of the flat portion, and the directivity can be made available or not in one tube 4.

It is to be noted that an electric stove that can obtain the same effect can be realized even if a plurality of long portions of the carbon-based resistance heating elements have different cross-sectional shapes.

Further, among the long portions of the carbon-based resistance heating element, a plurality of long portions may have different lengths and cross-sectional areas, and an electric stove that can adopt various combinations can be realized.

In Examples 1 to 5, the heating element 1 was used.
Is formed in the stove body 2 in the horizontal direction, but it can be similarly implemented even if it is formed in the vertical direction and the oblique direction.

[0046]

As is apparent from the above embodiments, according to the present invention, the heating element is made of a carbon-based resistance heating element formed in a substantially comb-tooth shape and disposed in a single tubular body, thereby providing a long carbon heating element. Since the system resistance heating element can be disposed in a short tube, an electric stove can be realized in which the heating element can be made compact.

Further, in the long portion of the carbon-based resistance heating element formed in a substantially comb-tooth shape, one or more long sections are simultaneously molded with the material of the carbon-based resistance heating element set at different temperatures to obtain one piece. Can emit infrared rays with different wavelengths in the tube,
Further, by simultaneously molding with a material of the carbon-based resistance heating element set to a different output, it is possible to realize an electric stove that can be changed to a finer output with a single tube.

Further, since the heating element is made of carbon, it is possible to realize an electric stove that has a high emissivity and can increase the radiation efficiency.

Further, when the heating element is a carbon-based resistance heating element having a substantially comb-tooth shape, an extraction stove is gathered at one sealing portion of the tubular body, so that an electric stove that requires only half the wire processing space can be realized. It has a great effect.

[Brief description of the drawings]

FIG. 1 is a side sectional view of an electric stove according to a first embodiment of the present invention.

FIG. 2 is a sectional view of a heating element according to the first embodiment of the present invention.

FIG. 3 is a sectional perspective view of a heating element according to the first embodiment of the present invention.

FIG. 4 is a cross-sectional view of a heating element according to a second embodiment of the present invention.

FIG. 5 is a perspective view of a carbon-based resistance heating element having a different shape from the heating element according to the second embodiment of the present invention.

FIG. 6 is a sectional view of a heating element according to a third embodiment of the present invention.

FIG. 7 is a sectional view of a heating element according to a fourth embodiment of the present invention.

FIG. 8 is a sectional view of a heating element according to a fifth embodiment of the present invention.

9A is a perspective view of a carbon-based resistance heating element of a heating element according to Embodiment 5 of the present invention. FIG. 9B is a perspective view of a carbon-based resistance heating element having a different cross-sectional shape according to Embodiment 5 of the invention. (D) A perspective view of a carbon-based resistance heating element having a different cross-sectional shape according to the fifth embodiment of the present invention.

FIG. 10 is a side sectional view of a conventional electric stove.

FIG. 11 is a partially cutaway sectional view of a conventional heating element.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Heating element 1a-1e Carbon-based resistance heating element 2 Stove main body 3 Reflector 4 Tube 5 Connection line 6 Connection tube 7 Foil 8 Outgoing line 9 Sealing part 10 Fixed plate 11 Long part 12 U-turn part 13 Connection body 14 Heating unit

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Kazuyuki Ohara 1006 Kazuma Kadoma, Kazuma, Osaka Prefecture F-term in Matsushita Electric Industrial Co., Ltd. 3L087 AA11 AC11 AC13 BC13 CA01 CA13 CA15 CA16 CB02 CB05 CC04 CC06 CC08 DA15 DA18 DA23 DA24

Claims (8)

[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 includes a carbon-based resistance heating element, An electric stove, comprising: a tubular body covering an outer periphery; wherein the carbon-based resistance heating element is formed in a substantially comb-like shape and disposed in the tubular body so as to be able to conduct electricity. 2. 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 is a carbon-based resistance heating element. An electric stove, comprising: a tubular body covering an outer periphery; wherein the carbon-based resistance heating element is formed in a meandering shape, disposed in the tubular body, and can be energized. 3. The electric stove according to claim 1, wherein the heating element includes a plurality of carbon-based resistance heating elements, and a connection body that electrically and mechanically connects the carbon-based resistance heating elements. 4. A heating device according to claim 1, wherein at least a part of the carbon-based resistance heating element has a different heating temperature.
4. The electric stove according to claim 3. 5. The electric stove according to claim 1, wherein at least a part of the carbon-based resistance heating element has a different output. 6. The carbon-based resistance heating element according to claim 1, wherein at least a part of the resistance heating element has a different sectional area.
An electric stove according to any one of the preceding claims. 7. The electric stove according to claim 1, wherein at least a part of the carbon-based resistance heating element has a different length. 8. The heating device according to claim 1, wherein at least a part of the carbon-based resistance heating element has a different cross-sectional shape.
4. The electric stove according to claim 3.