JP4741929B2 - Infrared bulb and heating device - Google Patents

Description

  The present invention relates to an infrared light bulb used as a heat source for heating means, and more particularly, to an infrared light bulb using a carbon-based material as a heating element of the infrared light bulb and a heating device using the infrared light bulb.

  A conventional infrared light bulb used as a long heat source is configured by enclosing a coiled tungsten wire or a rod-like or plate-like carbon-based sintered body as a heating element inside a cylindrical glass tube. Examples of the heating device in which such an infrared light bulb is used include various devices that require a heat source such as an electric device such as an electric stove, a cooker, and a dryer, and an electronic device such as a copying machine, a facsimile, and a printer. .

  As described above, since infrared bulbs are used as heat sources in various devices, there are various requirements for infrared bulbs in the specifications of devices using the infrared bulbs. For example, it is a high temperature as a heat source, is reliably maintained at a specified temperature, has a wide temperature adjustment range, can be converted into heating energy with high efficiency with respect to input power, and uniformly heats an object to be heated This is a requirement that it can be done, that only a specified direction can be heated, and that the infrared bulb can be easily attached and detached. Various infrared light bulbs have been proposed for the purpose of satisfying such requirements (see, for example, Patent Document 1 and Patent Document 2).

As a conventional infrared bulb that can be heated to a high temperature, two plate-like heating elements formed of a carbon-based sintered body are provided in parallel at a predetermined distance and enclosed in a glass tube Has been proposed (see, for example, Patent Document 1). In addition, as a conventional infrared bulb, there has been proposed one in which two infrared bulbs are arranged side by side with a predetermined distance, and a glass tube is provided so as to surround the two infrared bulbs ( For example, see Patent Document 2.)
JP 2001-319759 A JP 2001-313005 A

  However, in the conventional infrared light bulb configured as described above, two heating elements or two infrared light bulbs are arranged side by side with a predetermined distance so that they can be heated to a high temperature. Since the structure is arranged inside, the heat source has a problem that its cross-sectional shape (cross-sectional shape orthogonal to the extending direction of the infrared light bulb) must be large, and there is a problem that the arrangement space becomes large. there were.

As described above, infrared light bulbs used as a heat source are used in various devices, and are required to be configured to make heating at high temperatures more efficient, thinner and smaller than input power.
An object of the present invention is to provide an infrared bulb having a thin and small shape, and to provide an infrared bulb capable of radiating heat at a predetermined temperature in a desired direction and a heating device using the infrared bulb. And

  The present invention solves the above-described problems, and provides a highly versatile infrared bulb that can be easily adapted in various applications, and a heating device using the infrared bulb. Objective.

In order to solve the above problems and achieve the object of the present invention, an infrared light bulb according to a first aspect of the present invention includes:
A plate-shaped emitting heat having a plane,
A holding block fixed to both ends of the heating element; an internal lead wire member electrically connected to the holding block; and an external lead wire electrically connected to the internal lead wire member via a molybdenum foil; A heat generating structure, and
A glass tube in which a plurality of the heat generating components are accommodated, the heat generating components are arranged so that the longitudinal directions of the heat generating components are parallel, and the molybdenum foil is sealed in an embedded portion and filled with an inert gas. An infrared bulb comprising:
Inside the glass tube, a heat-resistant tube that houses at least a part of one heat-generating structure of adjacent heat-generating structures and is open at both ends is provided.
A fixing means provided at one end of the heat-resistant tube is engaged with the internal lead wire member so that the internal lead wire member is fixed inside the heat-resistant tube .
In the infrared light bulb of the second aspect of the present invention, a spiral spring portion is formed in a part of the internal lead wire member in the first aspect,
The fixing means is configured by an engagement portion that is an end portion bent to the inside of the heat-resistant tube or a convex portion protruding to the inside of the heat-resistant tube, and the spring portion and the engagement portion are engaged with each other. Has been.
In the infrared light bulb of the third aspect of the present invention, a fixing tool is mounted inside the heat-resistant tube as the fixing means in the first aspect.
The fixture and the internal lead wire member are engaged with each other so that the internal lead wire member is fixed inside the heat-resistant tube.

In the infrared light bulb according to the fourth aspect of the present invention, the heat-resistant tube according to the first to third aspects may be formed of a material having light transmittance in the infrared region.

Infrared ray lamp of the fifth aspect of the present invention, the plane of said plurality of heating elements in a first aspect to the third aspect described above is placed oriented in the same direction, the tube wall of the heating element is said refractory tube It is good also as a structure arrange | positioned so that it may closely_contact | adhere .

In the infrared light bulb according to the sixth aspect of the present invention, a reflective film may be formed on a part of the glass tube according to the first to third aspects .

  In the infrared light bulb of the seventh aspect of the present invention, the reflective film in the sixth aspect may be formed of a material containing any metal of gold, titanium nitride, aluminum, nickel, chromium, or aluminum oxide. good.

  An infrared light bulb according to an eighth aspect of the present invention may be constituted by a carbon-based heating element formed by firing, wherein the heating element according to the first to seventh aspects includes a carbon-based substance.

  An infrared light bulb according to a ninth aspect of the present invention is a solid carbon-based heating element formed by firing, wherein the heating element in the first to seventh aspects includes a carbon-based substance and a resistance adjusting substance. You may comprise.

  In the infrared light bulb of the tenth aspect of the present invention, the heating element in the first to seventh aspects is molybdenum disilicide, lanthanum chromite, silicon carbide, nichrome, Fe (iron) -Cr (chromium). -You may form by the metal chosen from AL (aluminum) alloy and stainless steel.

A heating device according to an eleventh aspect of the present invention includes the infrared light bulb according to the first to fifth aspects described above,
Reflecting means for reflecting heat radiated from the heating element is provided at a position facing the flat portion of the heating element .

A heating device according to a twelfth aspect of the present invention is a reflecting plate in which the reflecting means in the eleventh aspect reflects heat radiated from a flat portion of the heating element substantially in parallel, and the reflecting plate it may be configured to place the center of the heat source section is configured by the plurality of heating elements at the focal point of the parabola a square was linear orthogonal to the extending direction of the reflector.

In a heating device according to a thirteenth aspect of the present invention, the infrared light bulb according to the eleventh aspect includes two heating elements,
The reflecting means is a reflecting plate that reflects heat radiated from the plane of the heating element substantially in parallel, and the reflecting plate has a longitudinal direction of the reflecting plate so that the center of each heating element is a focal point. The cross section orthogonal to may be configured in a shape combining two parabolic shapes.

14 heating apparatus aspect of the present invention, the reflecting plate in the twelfth aspect described above, even in a configuration in which the convex portion protruding Oite the heating side to the central portion of the cross section perpendicular to the longitudinal direction is formed good.

In the heating device according to the fifteenth aspect of the present invention, the uneven portion for irregularly reflecting the heat radiated from the heating element is formed in the central portion of the cross section perpendicular to the longitudinal direction of the reflector in the twelfth aspect. A configuration may be used.

The heating apparatus of the 16th viewpoint of this invention may arrange | position a cylindrical cylinder so that the said glass tube of the said infrared bulb in said 11th viewpoint may be surrounded.

17 heating apparatus aspect of the present invention, the eleventh Te aspect to the sixteenth aspect odor of a heating apparatus having a control circuit including a power source,
A plurality of external terminals connected to respective external leads of the plurality of heat-generating structure,
Anda plurality of power supply terminals connected to said power supply,
Said control circuit, said external terminal and said power supply terminal is selectively connected, connects the heating structure in series, in parallel or alone.

18 heating apparatus aspect of the present invention, the control circuit is on-off control in terms of the seventeenth, duty factor control, phase control, and the respective circuits of the zero-crossing control alone, or in combination of at least two It may be configured.

A heating device according to a nineteenth aspect of the present invention may be constituted by a carbon-based heating element formed by firing, wherein the heating element according to the eleventh to eighteenth aspects includes a carbon-based substance.

A heating apparatus according to a twentieth aspect of the present invention is a solid carbon-based heating element formed by firing, wherein the heating element according to the eleventh to eighteenth aspects includes a carbon-based substance and a resistance adjusting substance. You may comprise.

In a heating device according to a twenty-first aspect of the present invention, the heating element in the eleventh to eighteenth aspects is molybdenum disilicide, lanthanum chromite, silicon carbide, nichrome, Fe-Cr-AL alloy, and stainless steel. You may comprise by the metal chosen from these.

According to the present invention, it is possible to provide a highly versatile infrared light bulb that is small and highly efficient and can be easily adapted to various uses, and a heating device using the infrared light bulb.
ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to provide the infrared light bulb which has a thin small shape, and provides the infrared lamp which can heat a desired direction to predetermined | prescribed temperature, and the heating apparatus using this infrared light bulb. Can do.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of an infrared light bulb and a heating device using the infrared light bulb according to the invention will be described with reference to the accompanying drawings.

Embodiment 1
An infrared bulb according to Embodiment 1 of the present invention will be described with reference to FIG. FIG. 1 is a front view showing the structure of the infrared light bulb of the first embodiment. In the infrared light bulb shown in FIG. 1, since the infrared light bulb has a long shape, an intermediate portion thereof is broken and omitted.

  In the infrared light bulb of the first embodiment, two sets of heat generating components, that is, a first heat generating component 100A and a second heat generating component 100B are provided in the extending direction inside the glass tube 1 formed of a transparent quartz glass tube. Are arranged in parallel. Both end portions of the glass tube 1 are welded in a flat plate shape and filled with an inert gas such as argon gas or a mixed gas of argon gas and nitrogen gas, and the first heat generating structure 100A and the second heat generating structure. The heating elements 2A, 2B, etc. in 100B are sealed. Note that argon gas or a mixed gas of argon gas and nitrogen gas, which is an inert gas sealed inside the glass tube 1, is sealed in order to prevent oxidation of the heating elements 2A and 2B, which are carbon-based materials. ing.

  The first heat generating structure 100A includes an elongated flat plate-like first heat generating body 2A as a heat radiator, a holding block 3A fixed to both ends of the first heat generating body 2A, and an outer end of the holding block 3A. Attached internal lead wire member 11A, external lead wire 9A led out from both ends of glass tube 1, molybdenum foil 8A for electrically connecting external lead wire 9A and internal lead wire member 11A at the sealed portion, and heat resistant tube 12. The heat-resistant tube 12 is arranged so as to cover the first heating element 2A, the holding blocks 3A fixed to both ends thereof, and the internal lead wire members 11A provided on both sides thereof. An engaging portion 12a formed at one end of 12 is engaged with a part of the internal lead wire member 11A. The internal lead wire member 11A includes a coil portion 5A wound around the outer end portion of the holding block 3A, a spring portion 6A formed in a spiral shape, and an internal lead wire 7A connected to the molybdenum foil 8A. The internal lead wire member 11A according to the first embodiment will be described using an example in which the lead wire member 11A is integrally formed of a molybdenum wire, but is formed using an elastic metal wire (round bar / flat plate) made of tungsten, nickel, or the like. You may do it. The spring portion 6A applies tension to the first heating element 2A, and is configured so that the first heating element 2A is always disposed at a desired position. In addition, by providing the spring portion 6A between the internal lead wire 7A and the coil portion 5A in this way, it is possible to absorb changes due to expansion and contraction in the first heating element 2A.

  On the other hand, the second heat generating structure 100B arranged in parallel with the first heat generating structure 100A is fixed to both ends of the elongated flat plate-shaped second heat generating body 2B as a heat radiator. The holding block 3B, the internal lead wire member 11B attached to the outer end of the holding block 3B, the external lead wire 9B led out from both ends of the glass tube 1, and the external lead wire 9B and the internal lead wire member 11B are sealed. It is comprised by the molybdenum foil 8B electrically connected in a part. That is, the second heat generating structure 100B is different from the first heat generating structure 100A in that the heat-resistant tube 12 is not provided, and the configuration other than the heat-resistant tube 12 is the same as that of the first heat generating structure 100A. is there. The second heat generating structure 100B is provided in the vicinity of the heat-resistant tube 12 of the first heat generating structure 100A, and the thickness of the heat-resistant tube 12 is substantially the same as that of the first heat generating body 2A and the second heat generating body. It becomes the distance between 2B.

  The heat-resistant tube 12 used in Embodiment 1 has a thickness of 1.0 mm and an outer diameter of 6.0 mm. The thickness of the heat-resistant tube 12 is preferably 0.2 mm to 1.0 mm. The length of the heat-resistant tube 12 is a length that reliably covers the entire first heating element 2A. In the first embodiment, the first heating element 2A, the holding blocks 3A at both ends thereof, and the internal lead wire The length is set so that most of the member 11A is covered.

FIG. 2 is a front view showing the heat-resistant tube 12 covering the first heating element 2A and the like in the first heating structure 100A. 2A is a configuration of the heat-resistant tube 12 used in Embodiment 1, and FIGS. 2B and 2C are front views showing another configuration example of the heat-resistant tube 12.
As shown in FIG. 2A, one end 12a of the heat-resistant tube 12 of the first embodiment is bent inward, and is engaged with the outer end of the spring portion 6A in the internal lead wire member 11A. It is the structure to do. Thus, since the heat-resistant tube 12 is disposed so as to be engaged with the internal lead wire member 11A in the first heat-generating structure 100A, the entire first heat-generating member 2A is reliably covered with the heat-resistant tube 12. ing. In addition, since the plate-like first heating element 2A is housed inside the cylindrical heat-resistant tube 12 and both ends of the heat-resistant tube 12 are open, the heat-resistant tube 12 has an argon inside. An inert gas such as gas or a mixed gas of argon gas and nitrogen gas is circulated. Accordingly, the first heating element 2A inside the heat-resistant tube 12 is always exposed to an inert gas such as argon gas or a mixed gas of argon gas and nitrogen gas.

  In the infrared light bulb of the first embodiment, the first heat generating structure 100A and the second heat generating structure 100B are arranged so that the longitudinal directions thereof are in the vertical direction. A heat-resistant tube 12 that functions as an insulating wall for the second heat generating structure 100B is positioned and fixed by the internal lead wire member 11. As described above, in the infrared light bulb according to the first embodiment, it is possible to dispose the heat-resistant tube 12 only in a necessary portion. Further, even when an impact is applied to the infrared light bulb, the heat-resistant tube 12 is disposed so as to be in close contact with the inside of the glass tube 1 without a substantial gap and does not move. Damage to the tube 1 is prevented.

As a means for fixing the heat-resistant tube 12 to the internal lead wire member 11A in the first heat generating structure 100A, for example, in addition to the structure shown in FIG. There is a configuration shown in c). The fixing means shown in FIG. 2 (b) forms a convex portion 120a protruding inward in the vicinity of the vertical upper end portion 120b of the heat-resistant tube 120, and the convex portion 120a has a spring portion 6A of the internal lead wire member 11A. This is a fixing method for engaging the upper end portion. Further, the fixing means shown in FIG. 2 (c) bends one end 121a of the heat-resistant tube 121, and engages the end 121a with the intermediate portion of the spring portion 6A of the internal lead wire member 11A. Is. Thus, in order to engage one end 121a of the heat-resistant tube 121 and the intermediate portion of the spring portion 6A, the internal lead wire member 11A connected to the first heating element 2A is rotated. The intermediate portion of the spring portion 6A engages with the protruding portion of the end portion 121a. This engagement method can also be applied in the engagement state between the convex portion 120a and the spring portion 6A shown in FIG. 2B, and the convex portion 120a can be engaged with the intermediate portion of the spring portion 6A. It becomes possible.
As described above, it is necessary to limit the arrangement direction of the infrared light bulb to the vertical direction in which the engagement portion is upward by engaging the convex portion 120a and the end portion 121a with the intermediate portion of the spring portion 6A. It becomes possible to set in any direction.

  Note that the method of fixing the heat-resistant tube 12 in the first heat generating structure 100A is not limited to the method shown in FIG. 2, and a fixing tool such as an insertion pin or a spacer is provided inside the heat-resistant tube 12. There is a method of attaching and preventing the movement of the internal lead wire portion 11, and any fixing method can be used as long as the inert gas in the infrared light bulb can circulate inside the heat resistant tube 12 without blocking the inside of the heat resistant tube 12.

It should be noted that the end face of both ends of the heat-resistant tube 12 can be improved in strength and breakage prevention by subjecting the end surfaces of the both ends to deburring or heating to form a curved curved surface.
Since the heat-resistant tube 12 is configured to circulate an inert gas, the first heat generating structure 100A and the second heat generating structure 100B are disposed in close contact with each other inside the glass tube 1 to seal both end portions. In this way, the first heating element 2A and the second heating element 2B are separated from each other with a predetermined distance, and the inert gas that circulates between the first heating element 2A and the second heating element 2B. It can be used in an atmosphere.

Further, in the infrared light bulb of the first embodiment, since the inert gas is circulated inside the glass tube 1, excellent thermal diffusion occurs during heating, and the temperature of each heating element 2A, 2B. The heater temperature can be changed depending on the gas characteristics.
The material of the heat-resistant tube 12 may be a material that can withstand the temperature of the heating elements 2A and 2B and that has an insulating property. For example, heat resistant glass, crystallized glass, quartz, ceramics and the like are preferable. In particular, a material having transparency in the infrared region is preferable.

  Hereinafter, a specific configuration of the first heat generating structure 100A in the first embodiment will be described. Since the second heat generating structure 100B is the same as the structure of the first heat generating structure 100A except for the heat-resistant tube 12, the description of the first heat generating structure 100A is applied and omitted here.

  The holding block 3A is composed of two cylindrical portions having different steps and different diameters, and the coil portion 5 of the internal lead wire member 11A is fixed to a portion having a small diameter, and a portion having a large diameter is provided. Is formed with a slit (slit) into which the first heating element 2A is inserted and sandwiched. The holding block 3A is electrically connected with both ends of the first heating element 2A inserted and sandwiched. The holding block 3A is made of a conductive material and a material that dissipates heat from the first heating element 2A and does not conduct high heat to the coil portion 5A of the internal lead wire member 11A. That is, the holding block 3A is formed of a heat gradient material having a thermal gradient and a conductive material so as not to directly transfer the heat of the first heating element 2A to the coil portion 5. For example, graphite is preferable. However, the material of the holding block 3A may be a material having excellent conductivity such as a metal material. Further, the shape of the holding block 3A is not limited to a cylindrical shape, and may be a shape that is easy to manufacture, such as a rectangular shape.

A coil portion 5A in which a metal wire having elasticity formed of a material such as molybdenum, tungsten, or nickel is spirally wound is fixed to a thin portion of the holding block 3A. The coil portion 5A is wound in close contact with the outer peripheral surface of the holding block 3A, and both are electrically connected. The coil portion 5A is connected to the internal lead wire 7A via an elastic spring portion 6A.
In the configuration of the infrared light bulb according to the first embodiment, since the spring portion 6A is formed between the internal lead wire 7A and the coil portion 5A, the dimensional change due to the expansion of the first heating element 2 can be absorbed. is there. Further, welding or the like may be used for the coil portion 5A as long as it is a method of being electrically connected to the holding block 3A.

  In the infrared light bulb of the first embodiment, the internal lead wire 7A is connected to the external lead wire 9A via the molybdenum foil 8A. As described above, in the first heat generating structure 100A of the infrared light bulb of the first embodiment, the holding blocks 3A and 3A, the coil parts 5A and 5A, the spring parts 6A and 6A are provided on both sides of the first heat generating body 2A. Internal lead wires 7A and 7A, molybdenum foils 8A and 8A, and external lead wires 9A and 9A are connected to each other. This configuration is the same for the second heating element 2B, and holding blocks 3B and 3B, coil parts 5B and 5B, spring parts 6B and 6B, internal lead wires 7B and 7B, molybdenum on both sides of the second heating element 2B. The foils 8B and 8B and the external lead wires 9B and 9B are connected to each other. The first heat generating structure 100A can cover the first heat generating body 2A and be exposed to an inert gas, and can be disposed close to the second heat generating structure 100B. A heat resistant tube 12 is provided.

In the infrared light bulb of the first embodiment configured as described above, when power is supplied to the external lead wires 9A and / or 9B derived from both sides, the first heating element 2A and / or the second heat generation are performed. A current flows through the body 2B, and heat is generated by the resistance of each of the heating elements 2A and 2B. At this time, infrared rays are radiated from the first heating element 2A.
When the first heating element 2A and the second heating element 2B are heating elements of the same specification, the first heating element 2A disposed inside the heat-resistant tube 12 is in a heat dissipation state as compared with the second heating element 2B. It is possible to change. For example, the radiation intensity distribution can be changed depending on the shape and material of the heat-resistant tube 12, and the temperature of the first heating element 2A can be made higher than that of the second heating element 2B. As a result, the radiant energy of the infrared light bulb of the first embodiment can be increased.

In the infrared light bulb of the first embodiment, the first heating element 2A and the second heating element 2B are made of a carbon-based material formed into a long plate shape, and are formed on a crystallized carbon substrate such as graphite. It is formed from the mixture which added the resistance adjustment substance of the nitrogen compound, and the amorphous carbon. As the dimensions of the first heating element 2A and the second heating element 2B in the first embodiment, for example, those having a plate width of 3.6 mm, a plate thickness of 0.3 mm, and a length of 280 mm were used. The first heating element 2A and the second heating element 2B desirably have a ratio of plate width to plate thickness of 5/1 or more. By making the plate width 5 times or more larger than the plate thickness, the amount of heat emitted from the surface constituting the plate width becomes significantly larger than the amount of heat emitted from the surface constituting the plate thickness, and the first heating element 2A and the second heat generation. It becomes possible to give directivity to the heat radiation of the body 2B.
In the first embodiment, the heat-resistant tube 12 has an inner diameter of 4.0 mm and an outer diameter of 6.0 mm, and the glass tube 1 has an inner diameter of 10.5 mm and an outer diameter of 12.5 mm. 1, the first heating element 2 </ b> A, the second heating element 2 </ b> B, and the heat-resistant tube 12 are arranged in close contact with each other.

  The heating elements 2A and 2B made of the carbon-based material have high heat generation efficiency, and the time from the start of heating until reaching the rated temperature is extremely short, and no inrush current and flicker are generated during lighting. Moreover, the lifetime of such heat generating elements 2A and 2B is about 10,000 hours. This is about twice the life of the heating elements 2A and 2B formed of tungsten wire, although it depends on the operating temperature. Also, as another method, it is possible to increase radiation efficiency and provide directivity by forming a substantially planar portion even in a fiber-like or felt-like shape containing carbon.

FIG. 3 is a cross-sectional view in a direction orthogonal to the extending direction (longitudinal direction) of the infrared light bulb, and the radiation direction is indicated by an arrow. 3A is a cross-sectional view of the infrared light bulb of the first embodiment, and FIG. 3B is a cross-sectional view showing an example of an infrared light bulb having another configuration.
As shown in FIG. 3 (a), in the infrared light bulb of the first embodiment, the two flat heating elements 2A and 2B are precisely close to the center line in the cross section of the substantially cylindrical glass tube 1. They are arranged side by side, and are arranged so that each plane portion faces the same direction. That is, in FIG. 3, the planar portions of the two flat heating elements 2 </ b> A and 2 </ b> B are arranged in the vertical direction. Therefore, in the state shown in FIG. 3, the largest amount of heat is radiated in the vertical direction of the glass tube 1 of the infrared light bulb, and the object to be heated is arranged at any position above and below. Heated efficiently.

  In the configuration shown in FIG. 3B, the cross-sectional shape of the two heating elements 21A and 21B is set to a range of 2/1 or less although the ratio of the plate width to the plate thickness is 1/1 or more. This is an example. By arranging the plurality of heating elements 2A and 2B configured in this manner so as to face the same direction, it is possible to improve the directivity of the infrared light bulb. When a plurality of heating elements 2A and 2B having the same specifications are arranged side by side, the heating element 21A disposed inside the heat-resistant tube 12 can be obtained by changing the heat-resistant tube 12 to a material having a different shape and radiation intensity distribution. The temperature can be increased, the temperature distribution can be changed, and heating with directivity and temperature gradient can be performed. This makes it possible to effectively perform heating with different heat distributions.

In Embodiment 1 described above, the heating elements 2A and 2B have been described using a carbon-based material. However, molybdenum disilicide, lanthanum chromite, silicon carbide capable of forming the heating elements 2A and 2B in a substantially planar shape. The same effect can be obtained even in a heating element made of a material mainly composed of any one selected from nichrome, Fe (iron) -Cr (chromium) -AL (aluminum) alloy, and stainless steel.
Furthermore, in the present invention using the heat generating material, since the heat generating element can be used not only in an inert gas atmosphere but also in the air, the heat-resistant tube 12 covering the heat generating element is made of glass having both ends opened in a cylindrical shape. The structure inserted in the pipe | tube 1 may be sufficient and the same effect can be acquired.

In the first embodiment, the example in which the two heat generating structural members 100A and 100B are used inside the glass tube 1 has been described. However, a configuration in which a plurality of heat generating structural members are disposed inside the glass tube 1 is also possible. is there. In this case, every other heat-resistant tube 12 is provided so that adjacent heat generating components are not in direct contact and a desired distance can be secured.
The heat-resistant tube 12 may be configured to cover a part of the heating element 2A instead of the entire heating element 2A. By configuring in this manner, the covered portion of the heating element 2A has a higher temperature than other parts, and the object to be heated can be heated with a temperature gradient rather than uniform.

<< Embodiment 2 >>
Hereinafter, a heating device according to a second embodiment of the present invention will be described with reference to the accompanying drawings.
FIG. 4 is a cross-sectional view showing the structure of the heat source in the heating apparatus of the second embodiment. The heating apparatus according to the second embodiment uses the infrared light bulb 90 described in the first embodiment and the reflector 50 as a heat source in order to reflect the heat radiated from the infrared light bulb in a desired direction. In addition to the heat source, the heating device of the second embodiment includes components of a commonly used heating device such as a control unit that controls power to the infrared light bulb 90 and a casing that forms the appearance of the device. . Regarding the heating device of the second embodiment, the configuration of the heat source, which is a feature of the present invention, will be described in detail.

  Since the infrared light bulb 90 in the heating device of the second embodiment is the infrared light bulb shown in FIG. 1 in the first embodiment, the flat plate-like first heating element 2A and the second heating element 2B are included in the glass tube 1. Are arranged side by side, and are arranged so that each plane portion faces the same direction. Therefore, the heating device of the second embodiment is configured such that the largest amount of heat is radiated in the direction in which the planar portions of the first heating element 2A and the second heating element 2B face.

  In the heating device of the second embodiment, one of the two directions in which the planar portions of the first heating element 2A and the second heating element 2B of the infrared light bulb 90 face is the front direction of the heating device. Yes, the other direction is the back direction of the heating device. In the cross-sectional view shown in FIG. 4, the upward direction of the infrared light bulb 90 is the front direction, and the downward direction is the back direction.

  As shown in FIG. 4, in the heating device according to the second embodiment, a reflecting plate 50 is disposed in the back direction of the heating elements 2 </ b> A and 2 </ b> B of the infrared light bulb 90. Therefore, it is the structure by which a to-be-heated object is arrange | positioned in the front direction of each heat generating body 2A, 2B of the infrared light bulb 90 in Embodiment 2. FIG.

  As the material of the reflector 50 used in the heating device of the second embodiment, a plate material having a mirror finish on the surface of aluminum having high reflectivity was used. The material of the reflecting plate 50 may be any material having high reflectivity and heat resistance, such as aluminum, aluminum alloy, or a metal plate such as stainless steel, or aluminum on the surface of the heat resistant material, A plate material or the like subjected to a metal thin film forming process such as titanium nitride, nickel, or chromium is used.

  As shown in FIG. 4, the reflecting plate 50 extends in the extending direction of the heating elements 2 </ b> A and 2 </ b> B so as to cover the back surfaces of the heating elements 2 </ b> A and 2 </ b> B of the infrared light bulb 90 (direction orthogonal to the paper surface in FIG. 4). Are formed to have the same cross section. In addition, the reflector 50 in Embodiment 2 is formed longer than each heat generating body 2A, 2B so that the extending direction of each heat generating body 2A, 2B may be covered.

  As shown in FIG. 4, the cross-sectional shape orthogonal to the extending direction (longitudinal direction) of the reflector 50 in the second embodiment is formed with a convex portion 50a protruding in a substantially isosceles triangle shape in the front direction at the center portion. Has been. It arrange | positions so that the vertex of this convex part 50a may become the intermediate point (center of a heating source) of 2A of 1st heat generating bodies and 2nd heat generating body 2B. Since the reflecting plate 50 is formed as described above, among the heat rays radiated from the heating elements 2A and 2B in the back direction, the heat rays radiated directly behind the heating elements 2A and 2B are reflected by the reflecting plate 50. It is reflected by the inclined surface of the convex portion 50a, irradiates the vicinity of both end portions 50b in the width direction of the reflector 50, and is widely reflected in the front direction of the heating device. Therefore, in the reflector 50 in the heating device of the second embodiment, the heat rays radiated directly behind the heating elements 2A and 2B are not reflected by the heating elements 2A and 2B, and the heating elements 2A and 2B are arranged. It is configured to be reflected to a position that is not. As a result, the heating apparatus using the reflecting plate 50 shown in FIG. 4 increases the number of heat rays reflected from both end portions of the cross section orthogonal to the longitudinal direction of the reflecting plate 50, and efficiently heats the object to be heated. If the convex portion 50a is not formed on the reflecting plate 50, the heat rays radiated directly behind the heating elements 2A and 2B are reflected by the reflecting plate in the direction in which the heating elements 2A and 2B are arranged. The heating elements 2A and 2B are irradiated and the object to be heated is not directly irradiated.

  As described above, in the heating device according to the second embodiment, the heat rays radiated from the planar portion in front of each heating element 2A, 2B are radiated from the planar portion in the back direction of each heating element 2A, 2B. A heat ray is reliably radiated | emitted by the reflecting plate 50 in the front direction of an infrared bulb, and the to-be-heated object arrange | positioned in the front direction of a heating apparatus is heated efficiently.

  In the heating device according to the second embodiment, the heat rays radiated from directly behind the heating elements 2A and 2B are reflected by the convex portions 50a of the reflecting plate 50, and in front of the edge 50b in the width direction of the reflecting plate 50. It is configured to be reflected parallel to the direction. For this reason, the heating apparatus of Embodiment 2 can heat the object to be heated arranged in the front direction of the heating elements 2A and 2B over a wide range.

As described above, the heating device according to the second embodiment has the reflector 50 provided at the rear of the infrared light bulb 90, and the protrusion 50a is provided at a position directly behind the heating elements 2A and 2B, so that the heating elements 2A and 2B are provided. The heat ray radiated immediately behind is reflected near the edge 50b of the reflector 50. Therefore, in the heating device of the second embodiment, the heat rays reflected by the convex portion 50a irradiate the vicinity of the edge 50b of the reflecting plate 50, and the edge 50b reflects the radiation so as to radiate the front direction of the heating device. . As described above, the heating device according to the second embodiment is directed toward the object to be heated by the primary radiation having directivity from the infrared light bulb 90 to the front side, and the secondary radiation and the tertiary radiation through the reflector 50. A wide range of higher-efficiency radiation is possible.
In the heating device of the second embodiment, when the same electric power is input to the first heating element 2A and the second heating element 2B, the first heating element 2A is inserted into the heat-resistant tube 12. Therefore, the temperature of the first heating element 2A is higher than the temperature of the second heating element 2B. Thereby, by using the heating apparatus of Embodiment 2, it becomes possible to perform heat distribution that particularly heats a desired region together with directivity.

The heating device of the second embodiment configured as described above provides the reflector 50 on the back side of the infrared light bulb 90 to reliably reflect the heat radiation from the heating elements 2A and 2B in the front direction. The object to be heated can be quickly and efficiently heated to a desired temperature.
In the heating device of the second embodiment, the two heating elements 2A and 2B are arranged so that the plane portions thereof face in the same direction, but the angle at which the two heating elements 2A and 2B face is different. It is also possible to do. For example, in order to concentrate the heat radiation to the object to be heated, the two heating elements 2A and 2B are arranged so that the plane portions of the heating elements 2A and 2B face each other somewhat inside, or vice versa. It is possible to heat a wide range. When arranged in this way, the shape of the reflector 50 is changed in accordance with the arrangement angle of each heating element 2A, 2B so that the heat radiation from the back side of the heating elements 2A, 2B is reflected in a desired direction. The same effect can be obtained. In addition, the number of heating elements can be three or more according to the specifications of the heating device. In this case, the same effect can be obtained by changing the shape of the reflecting plate according to the arrangement of the heating elements. .

  5 to 8 are cross-sectional views showing modifications of the reflecting plate in the heating apparatus of the second embodiment. 5 to 8 are cross-sectional views cut in a direction perpendicular to the extending direction (longitudinal direction) of the heating element. In these modified examples, those having the same functions and configurations as those of the second embodiment shown in FIG. 4 are formed of the same material, and are denoted by the same reference numerals, and description thereof is omitted.

  The reflecting plate 51 in the heating apparatus shown in FIG. 5 has a substantially parabolic shape in cross section cut perpendicular to the extending direction of the reflecting plate 51, and the position of the central point of the glass tube 1 and the reflecting plate 51. These parabolas have the same focal point F. That is, the parabolic focus F of the reflector 51 is located at an intermediate position between the first heating element 2A and the second heating element 2B (a heating center position in the heat source constituted by the two heating elements 2A and 2B). The position is arranged. With this configuration, the heat rays radiated to the back side of the glass tube 1 of the infrared light bulb 90 are radiated in parallel to the front direction of the infrared light bulb 90. As a result, the object to be heated arranged on the front side of the glass tube 1 is efficiently heated. At this time, a part of the heat rays radiated from the rear side of the heating elements 2A and 2B are reflected by the heating element itself, and the heating element itself is heated to use the reflector 50 shown in FIG. The heating elements 2A and 2B have a higher temperature than the case. Therefore, when the reflecting plate 51 shown in FIG. 5 is used, the directivity is higher and the heating device is capable of heating at a high temperature.

  The reflecting plate 52 shown in FIG. 6 has a configuration in which a cross-sectional shape cut perpendicularly to the extending direction of the reflecting plate 52 is a combination of two parabolas, and the positions of the focal points F1 and F2 of each parabola. The center of each heating element 2A and 2B (the position of the central axis parallel to the longitudinal direction of each heating element 2A and 2B) is disposed. Therefore, the central portion of the reflecting plate 52 is a convex portion 52a that is slightly raised. The apex of the convex portion 52a is an intermediate point between the two heating elements 2A and 2B. By comprising in this way, the heat ray radiated | emitted from the back side of each heat generating body 2A, 2B of an infrared bulb is radiated in parallel with the front direction of an infrared bulb. As a result, the object to be heated arranged on the front side of the glass tube 1 enclosing the heating elements 2A and 2B is heated with high efficiency. At this time, the heat rays radiated from the rear side of the heating elements 2A and 2B are reflected by the heating element itself, and the heating element itself is heated, compared with the case where the reflector 50 shown in FIG. 4 is used. The heating element becomes high temperature. Therefore, when the reflecting plate 52 shown in FIG. 6 is used, the directivity is higher, and the heating apparatus is capable of heating at a higher temperature.

  In the configuration shown in FIG. 6, the distance between the centers of the two heating elements 2A and 2B is P1, and in the reflector 51 shown in FIG. 5, the focal point F that separates the front side and the back side of the heating elements 2A and 2B When the length on the extended line of the position is P0, the length on the extended line of the positions of the focal points F1 and F2 that separate the front side and the back side of the heating elements 2A and 2B in the reflector 52 shown in FIG. 6 is (P1 + P0). ) That is, the reflecting plate 52 shown in FIG. 6 has a configuration that can radiate widely toward the front side compared to the reflecting plate 51 shown in FIG.

  The reflecting plate 53 shown in FIG. 7 has a substantially parabolic shape in which a cross-sectional shape cut perpendicularly to the extending direction of the reflecting plate 53 has a convex surface portion 53a whose front side protrudes at the center. The reflecting plate 53 is configured such that the position of the center point of the glass tube 1 and the position of the focal point F of the parabola are the same. That is, the position of the parabolic focus F of the reflecting plate 53 is arranged at an intermediate position between the two heating elements 2A and 2B (a heating center of a heating source constituted by each heating element). With this configuration, most of the heat rays radiated to the back side of the glass tube 1 of the infrared light bulb 90 are radiated parallel to the front direction of the infrared light bulb 90, and the back surfaces of the heating elements 2A and 2B. The heat rays radiated directly from the side are reflected and diffused by the convex portion 53a. As a result, according to the heating device having the reflecting plate 53, a wide range is efficiently heated with respect to the object to be heated arranged on the front side of the glass tube 1.

  The reflecting plate 54 shown in FIG. 8 has a concavo-convex portion 54a in a central portion of the cross-sectional shape cut perpendicularly to the extending direction of the reflecting plate 54 and facing the flat portions of the heating elements 2A and 2B. It is substantially parabolic. The reflecting plate 54 is configured such that the position of the center point of the glass tube 1 and the position of the focal point F of the parabola of the reflecting plate 54 are the same. That is, the position of the parabolic focus F of the reflecting plate 54 is arranged at an intermediate position between the two heating elements 2A and 2B (a heating center of the heating source constituted by each heating element). By comprising in this way, most heat rays radiated | emitted to the back side of the glass tube 1 of the infrared bulb 90 are radiated | emitted in parallel with the front direction of the infrared bulb 90, and from the back side of heat generating body 2A, 2B. The heat rays radiated directly behind are diffused and diffused to the convex and concave portions 54a. As a result, according to the heating device having the reflecting plate 54, the heated object 60 disposed on the front side of the glass tube 1 is efficiently heated in a wide range.

  As described above, in the configuration shown in FIGS. 7 and 8, the convex surface 53a or the convex concave portion 54a is formed in the central portion of the reflectors 53 and 54 (the portion facing the back side of the heating element), thereby forming the convex surface. The heat rays irregularly reflected by the portion 53a or the convex recess 54a heat the object to be heated in a wide range as secondary radiation. As a result, the heating surface of the object to be heated is widened by the directional primary radiation radiated from the plane portion of the heating elements 2A and 2B to the front side and the secondary radiation including irregular reflection by the reflectors 53 and 54. Heating can be performed with high efficiency.

In the configuration shown in FIGS. 5 to 8, the number of heating elements can be three or more according to the specifications of the heating device. In this case, the reflector plate is also used according to the arrangement of the heating elements. The same effect can be obtained by redesigning the shape.
In the heating device shown in FIGS. 5 to 8, the same power is input to the first heating element 2A and the second heating element 2B, and the first heating element 2A is a heat-resistant tube. 12, the temperature of the first heating element 2A is higher than the temperature of the second heating element 2B. Thereby, by using the heating apparatus of Embodiment 2, it becomes possible to perform heat distribution that particularly heats a desired region together with directivity.

  FIG. 9 is a perspective view showing an example of a heating device configured with the infrared light bulb and the reflector configured as described above as a heat source. In the heating apparatus shown in FIG. 9, the reflector 50 and the infrared light bulb 90 are disposed inside the housing 80. The reflector 50 and the infrared bulb 90 shown here have the same configuration as the reflector 50 and the infrared bulb shown in FIG. As the heating device, the infrared light bulb 90 and the reflectors 51, 52, 53, or 54 shown in FIGS. 5 to 8 can be provided as a heat source.

As described above, the heating device using the infrared light bulb and the reflector as a heat source can perform wide-range heating, heating by parallel heat rays, uniform heating due to irregular reflection, and high-efficiency heating. It becomes a highly versatile heating device that can be easily changed in design according to the use environment.
Here, as the heating device, for example, a radiant electric heater such as a heating stove, a cooking device such as cooking and heating, a dryer for food, etc., an electronic device such as toner fixing in a copying machine, facsimile, printer, etc., and a short time Equipment that needs to be heated to high temperatures.

<< Embodiment 3 >>
Hereinafter, the heating apparatus of Embodiment 3 which concerns on this invention is demonstrated using attached FIG. FIG. 10 is a cross-sectional view taken along a direction orthogonal to the extending direction of the infrared light bulb 91 serving as the heat source of the heating device of the third embodiment.
The heating device of the third embodiment uses the infrared light bulb of the first embodiment described above as a heat radiation source. The heating device of the third embodiment has a configuration in which a reflective film 55 is formed on the back side of the glass tube 1 in the infrared light bulb of the first embodiment described above.

  As shown in FIG. 10, a reflective film 55 is formed on the back side (lower side in FIG. 10) of the glass tube 1 of the infrared light bulb in the third embodiment. The reflective film 55 reflects the heat rays emitted from the back side of the heating elements 2A and 2B and radiates from the front side of the glass tube 1. Therefore, the heating device of the third embodiment has a configuration that does not require a reflector, and can be used as a highly efficient heat source having directivity by an infrared light bulb having the reflective film 55.

In the third embodiment, the center positions of the two heating elements 2A and 2B are arranged on the central axis of the substantially cylindrical portion of the glass tube 1. That is, a center line in the extending direction of the glass tube 1 is disposed at an intermediate position between the two heating elements 2A and 2B. The reflection film 55 formed on the back side of the glass tube 1 is formed at a position facing the side surfaces of the heating elements 2A and 2B, that is, at a substantially semicircular portion in the cross-sectional shape of the glass tube 1.
In the third embodiment, the reflective film 55 is shown as being formed up to a position facing the side surfaces of the heat generating elements 2A and 2B (substantially semicircular portion in the cross section of the glass tube 1). What is necessary is just to form in the position which the heat ray from the plane part of the back side of 2B injects, or the position facing the plane part of the back side of heat generating body 2A, 2B.
The reflective film 55 in the third embodiment is formed of a material having a high reflectivity. In the third embodiment, a foil containing gold is transferred to the outer wall of the glass tube 1 and then fired.

In the infrared light bulb 91 in the heating device of the third embodiment configured as described above, the heat rays radiated from the back side of the heating elements 2A and 2B by the reflective film 55 formed on the glass tube 1 are surely generated by the heating elements 2A and 2A. 2B and the object to be heated, which is reflected on the front side of the glass tube 1 and reflected on the front side, can be heated with high radiation intensity.
According to the experiments by the inventors, the temperature of the heating element itself when the same voltage is applied to the heating elements 2A and 2B is 1100 ° C. when the reflection film 55 is not provided, and when the reflection film 55 is provided. Was 1200 ° C. Therefore, by providing the reflective film 55 on the glass tube 1, the infrared light bulb becomes a high energy radiator.

  Furthermore, the heating device of the third embodiment has a configuration in which no reflection plate is provided around the glass tube 1 and a reflection film 55 is formed in the vicinity of the heating element, and thus heat radiation is reflected by the reflection plate. Compared to the configuration, it is possible to reduce heat loss from the heating element.

  In the third embodiment, the reflective film 55 has been described as being manufactured by transferring and baking a foil containing gold on the outer wall of the glass tube 1, but the present invention is not limited to this example. For example, the same effect can be obtained even when a highly reflective material such as titanium nitride, aluminum, nickel, chromium, or aluminum oxide is used.

In the heating apparatus configured with the infrared light bulb 91 having the reflective film 55 configured as described above as a heat source, the infrared light bulb having the reflective film 55 is disposed inside the housing as shown in FIG. 9 described above. Thus, it is possible to perform heating with high efficiency in a wide range and heating with little heat loss, and it is possible to realize a highly versatile heating apparatus that can perform heating according to an object to be heated and a use environment.
Here, the heating device is a radiant electric heater such as a heating stove, a cooking device such as cooking and heating, an electronic device such as a dryer for food, a copying machine, a facsimile machine, a toner fixing in a printer, and a high temperature in a short time. Including equipment that needs to be heated.

<< Embodiment 4 >>
Hereinafter, the heating apparatus of Embodiment 4 which concerns on this invention is demonstrated using attached FIG. FIG. 11 is a cross-sectional view taken along a direction orthogonal to the extending direction of the infrared light bulb 92 serving as a heat source of the heating device according to the fourth embodiment.
The heating device of the fourth embodiment uses the infrared light bulb of the first embodiment described above as a heat radiation source. The heating device of the fourth embodiment has a configuration in which a cylindrical body is disposed around the glass tube 1 in the infrared light bulb of the first embodiment described above.

As shown in FIG. 11, the heat radiation source in the heating apparatus of the fourth embodiment is configured by an infrared light bulb 92 and a cylindrical tube 56 arranged so as to cover the periphery of the infrared light bulb. The material of the cylindrical body 56 is selected according to the purpose of use.
In the case of food heating, the cylindrical body 56 is formed of a glass tube, and the heat radiation from the flat portions of the heating elements 2A and 2B is transmitted. As described above, by providing the cylindrical body 56 around the glass tube 1, even if seasonings, gravy, and the like generated during the heating of food are scattered, the scattered matter does not directly touch the infrared light bulb 92.
If a high-temperature seasoning or gravy directly touches the infrared light bulb 92, there is a problem that the surface of the glass tube 1 is devitrified and the glass tube 1 is broken. However, in the heating device according to the fourth embodiment of the present invention, the above-described problems are completely prevented, and the life can be extended.

  When the heating device of the fourth embodiment is used for toner fixing in an electronic device such as a copying machine, a facsimile machine, or a printer, the cylindrical body 56 is used as a fixing roller, and an infrared light bulb is disposed therein. By configuring the electronic device in this way, the electronic device may be configured to irradiate the fixing portion of the toner fixing device with highly directional heat radiation from the planar portions of the heating elements 2A and 2B in the infrared light bulb. It becomes possible. As a result, the fixing portion is heated with high efficiency. In this way, by using the infrared bulb 92 that has high directivity and quick rise to a desired temperature, the electronic device can heat the fixing surface intensively, and can respond with high efficiency at the time of stand-up and standby of the device. It becomes possible to do.

  As described above, the infrared light bulb 92 capable of performing heat radiation with high directivity and the cylindrical body 56 having a different configuration according to the purpose are provided around the infrared light bulb 92, thereby protecting the infrared light bulb 92. In addition, it is possible to provide a heating device that rises quickly and has high heating efficiency. Here, the heating device is a radiant electric heater such as a heating stove, a cooking device such as cooking and heating, a dryer for food or the like, an electronic device such as toner fixing.

<< Embodiment 5 >>
Hereinafter, the heating apparatus of Embodiment 5 which concerns on this invention is demonstrated using attached FIG. FIG. 12 is a circuit diagram illustrating a heating method of the heating device according to the fifth embodiment.
The heating device of the fifth embodiment is characterized by using the infrared light bulb of the first embodiment described above as a heat source and a method for controlling the heat source. Hereinafter, the two heating elements 2A and 2B provided in the infrared light bulb will be described as a first heating element 2A and a second heating element 2B.

  The circuit diagram shown in FIG. 12 is a diagram showing an energization control method for the infrared light bulb in the heating device of the fifth embodiment, and shows a control circuit for the infrared light bulb in the heating device of the fifth embodiment. As shown in FIG. 12, the first external terminal 110 and the second external terminal 111 are provided on the external lead wire 9A connected to both ends of the first heating element 2A of the infrared light bulb in the fifth embodiment. Yes. In addition, a third external terminal 112 and a fourth external terminal 113 are provided on the external lead wire 9B connected to both ends of the second heating element 2B of the infrared light bulb in the fifth embodiment.

  Further, the control circuit in the heating device of the fifth embodiment is provided with three power supply terminals 115, 116, and 117 connected to the power supply V. The first power supply terminal 115 is configured to be connected to both the first external terminal 110 and the third external terminal 112 at the same time, or to be connected only to the first external terminal 110. The second power supply terminal 116 is configured so that both the second external terminal 111 and the fourth external terminal 113 can be connected simultaneously. The third power supply terminal 117 is configured to be connectable only to the third external terminal 112 when the first power supply terminal 115 is connected only to the first external terminal 110. At this time, The second external terminal 111 of the first heating element 2A and the fourth external terminal 113 of the second heating element 2B are configured to be electrically connected to each other.

  In the control circuit in the heating apparatus of the fifth embodiment configured as described above, the energization control of the first heating element 2A and the second heating element 2B is performed as follows.

[Parallel energization control]
When the first heating element 2A and the second heating element 2B are energized in parallel, the first external terminal 110 of the first heating element 2A and the third external terminal 112 of the second heating element 2B are 1 power supply terminal 115. At the same time, the second external terminal 111 of the first heating element 2A and the fourth external terminal 113 of the second heating element 2B are connected to the second power supply terminal 116. By connecting the control circuit in this way, for example, if the specifications of the first heat generating element 2A and the second heat generating element 2B are both 100V applied and the power consumption is 500W, the infrared light bulb is energized when the power supply V supplies 100V. The power consumption is 1000W. If each of the first heating element 2A and the second heating element 2B has a heating element temperature of 1100 ° C. when 100 V is applied, both the first heating element 2A and the second heating element 2B are heating elements. Each of them radiates heat at a temperature of 1100 ° C.

[Series conduction control]
When the first heating element 2A and the second heating element 2B are energized in series, the first external terminal 110 of the first heating element 2A is connected to the first power supply terminal 115. At the same time, the second external terminal 111 of the first heating element 2A and the fourth external terminal 113 of the second heating element 2B are electrically connected to each other. Then, the third external terminal 112 of the second heating element 2B is connected to the third power supply terminal 117. By connecting the control circuit in this way, when the first heating element 2A and the second heating element 2B have the above-mentioned specifications (100V, 500W), the power consumption of the infrared light bulb when 100V is supplied by the power source V. Will be 250W. When each of the first heating element 2A and the second heating element 2B has a heating element temperature of 1100 ° C. when 100 V is applied, both the first heating element 2A and the second heating element 2B are used. Both of them radiate heat at a heating element temperature of about 700 ° C.

[Single energization control]
For example, when only the first heating element 2 </ b> A is energized alone, the first external terminal 110 of the first heating element 2 </ b> A is connected to the first power supply terminal 115. At the same time, the second external terminal 111 of the first heating element 2 </ b> A is connected to the second power supply terminal 116. At this time, no voltage is applied to the second heating element 2B. By connecting the control circuit in this way, when the first heating element 2A has the above-mentioned specifications (100V, 500W), when 100V is energized by the power supply V, the power consumption of the infrared light bulb is 500W. The heating element 2A radiates heat at a heating element temperature of 1100 ° C.
As described above, by providing the three power supply terminals, the heating element temperature is changed by selecting an energizing circuit for the inside of the infrared light bulb, and adjustment heating at a desired temperature becomes possible. Therefore, in the heating device of the fifth embodiment, the planar portion of the heating element is set in a desired direction and the energization control is performed, so that it has excellent heat radiation directivity and can be easily adapted to the heated device. It is possible to control the heating temperature.

  In addition, although the heating apparatus of Embodiment 5 demonstrated in the example which controlled the heat radiation using the infrared light bulb of Embodiment 1, this invention is not limited to such a control method, and is mentioned above. It is also possible to control the heat radiation by using it as a method for controlling the heating device of the second embodiment.

  In the heating device of the fifth embodiment, when energization control is performed, temperature control can be added as a selection condition. As temperature control, for example, on / off control using a temperature detection means such as a thermostat, phase control of an input power source using a temperature detection sensor that senses an accurate temperature, current ratio control, zero cross control, etc. alone or in combination As a result, a heating device capable of highly accurate temperature management can be realized. Therefore, according to the heating device of the fifth embodiment configured as described above, heating with excellent radiation characteristics and high-accuracy temperature management can be performed by directivity control and energization control of the planar portion of the heating element. .

  As described above, in the infrared light bulb of the present invention, a plurality of heating elements that have a flat surface and are arranged so that their longitudinal directions are parallel to each other, and at least a part of the selected heating element are arranged. The heat resistant tube, and the heat generating tube and the heat resistant tube are sealed in a glass tube. The infrared light bulb configured in this way is configured to perform thermal radiation from the planes of a plurality of heating elements, so that radiation with high directivity can be performed, and at least a part of the heating element is covered with a heat-resistant tube. Therefore, the temperature of the heating element covered with the heat-resistant tube is increased and the radiation energy is increased.

  Further, in the infrared light bulb of the present invention, it is possible to make a heat source with high directivity by configuring the planes of the plurality of heating elements to face the same direction, and at least a part of the heating element is made of a heat-resistant tube. By covering, the heating element temperature becomes high, and the heating distribution can be adjusted.

  In the heating device of the present invention, a reflecting plate is disposed on the back side of the heating element in the infrared light bulb configured as described above, and heat is generated at a position facing at least two or more heating elements in the reflecting plate. Protrusions projecting in the direction of the body are provided. The heat ray incident on the convex portion of the reflecting plate is reflected in the direction other than the heating element, is incident on the reflecting plate again, and is reflected again on the front side. In the heating device configured in this way, the radiant heat emitted from the heating element is efficiently radiated to the front side by the convex reflection surface, and at least a part of the heating element is covered with a heat-resistant tube, so the heating element The temperature increases and the heating distribution can be adjusted.

  In the heating device of the present invention, a reflector is disposed on the back side of the heating element in the infrared bulb configured as described above, and the cross-sectional shape perpendicular to the longitudinal direction of the reflector is a parabolic shape, A heat generation center in a heating source by a plurality of heat generators is arranged at a focal position of the reflector. Since the center of heat generation in the plurality of heating elements is located at the focal point of the reflecting plate, radiant heat from the plurality of heating elements is reflected by the reflecting plate, and a wide range of radiation is possible.

  Further, in the heating device of the present invention, a reflecting plate is disposed on the back side of the heating element in the infrared light bulb configured as described above, and the reflection so that the heat rays reflected by the reflecting plate do not irradiate the heating element. By configuring the plate, it becomes possible to prevent a temperature rise due to secondary heating by the reflecting plate to the heating element, and a heating device with stable specifications can be realized. The resistance change rate of the heating element used in the infrared light bulb changes depending on the temperature of the heating element itself. In addition, the setting of the rating of the infrared bulb is often set considering only the self-heat radiation of the infrared bulb. When an infrared bulb set in this way is incorporated in a heating device, the rating of the heating device changes when the temperature of the heating element increases due to the shape of the reflector. Therefore, since the heating device of the present invention is configured so that the heating element is not irradiated by the reflector, the rating of the infrared light bulb is not affected by the reflector and the design of the heater having the desired specifications is ensured. Becomes easy.

  In the heating device of the present invention, a reflection film is provided on the back surface of the heating element in the infrared bulb configured as described above, and the reflection film reflects the heat radiation from the heating element in the same direction. It becomes possible to heat the object to be heated with high efficiency. As described above, by providing the reflective film on the back side of the infrared light bulb, the radiant heat radiated to the back side by the reflective film is returned to the heating element, and the heating element can be heated to a higher temperature. . The heating element configured as described above can radiate high-energy heat radiation in the same direction from the plane side and efficiently heat the object to be heated.

  Moreover, in the heating apparatus of this invention, it is also possible to set it as the structure which provided the infrared light bulb comprised as mentioned above and arrange | positioned the cylinder which covers the infrared light bulb. By comprising in this way, the foreign material emitted from a to-be-heated object etc., for example, gravy, a seasoning, etc., are obstruct | occluded by a cylinder and do not contact an infrared light bulb directly. Thereby, it becomes possible to prevent breakage and disconnection due to deterioration of the surface of the infrared light bulb, and a long-life heating device can be provided. Further, when the heating device of the present invention is used as a heat source for a copying machine or the like, for example, the cylindrical body is used as a toner fixing roller, and the portion where the toner fixing roller and the paper are in contact can be efficiently heated. Furthermore, in the above heating device, by providing a configuration in which at least a part of the heating element is covered with a heat-resistant tube, it becomes possible to increase the heating element temperature and to realize a heating device that can change the heating distribution. Can do.

  Further, the heating device of the present invention includes a plurality of heating elements arranged in parallel in the longitudinal direction, a heat-resistant tube arranged so as to cover at least a part of the selected heating elements, and these heating elements. And a glass tube enclosing the heat-resistant tube, a plurality of connection terminals capable of individually energizing each heating element, and a control circuit for selecting the connection state of the connection terminals. The heating device configured as described above can be set in various energized states. The heating device of the present invention, for example, energizes a plurality of heating elements in parallel, energizes only a part of the heating elements, energizes only a heating element at least partially covered with a heat-resistant tube, or a plurality of heating elements It becomes possible to selectively control the energization state such as energizing the body in series. In the heating device configured as described above, it becomes possible to individually set the energization state for a plurality of heating elements provided in one infrared light bulb, and the input power amount at the same rating The temperature of the heating element can be easily and reliably changed.

  Further, in the heating device of the present invention, it is possible to take temperature control into consideration when conducting energization control. As temperature control, for example, on / off control using temperature detecting means such as a thermostat, accurate temperature sensing is performed. By performing the phase control of the input power source using the temperature sensing sensor, the current supply rate control, the zero cross control, etc. alone or in combination, it is possible to perform temperature management with high accuracy.

  In addition, the heating device of the present invention can control the energization method of the connection terminals individually provided to a plurality of heating elements in one infrared bulb, and the plurality of heating elements are energized in parallel and in series. It is possible to energize, energize some heating elements, or energize heating elements that are at least partially covered with heat-resistant tubes, and change the input power amount and heating element temperature at the same rating. It becomes possible. In the change of the energization state, it is possible to perform temperature control with higher accuracy by performing phase control and on / off control using a sensor for detecting the energization rate and temperature. Furthermore, in the heating device of the present invention, since one infrared light bulb includes a plurality of heating elements, a configuration in which power is supplied only to the necessary heating elements can reduce accuracy with little variation. High temperature control is possible

  In the infrared light bulb and the heating device of the present invention, the heating element includes a carbon-based material and is a carbon-based heating element formed by firing. The material of the heating element includes a carbon-based material, and the carbon-based heating element formed by firing has a high characteristic of an emissivity of 80% or more. An infrared light bulb and a heating apparatus provided with a plurality of heating elements having such characteristics have a high heating effect and have an excellent heat source with a lot of primary radiation.

  In the infrared light bulb and the heating device of the present invention, the heating element is a solid carbon-based heating element formed by firing containing a carbon-based substance and a resistance adjusting substance. The material of the heating element includes a carbon-based substance and a resistance adjusting substance, and the emissivity of the heating element formed by firing has a high characteristic of 80% or more, and the resistance change rate is adjusted by including the resistance adjusting substance. And a stable heat source with little resistance change can be obtained. Furthermore, in the infrared bulb and the heating device of the present invention, a heat source made of an elastic material such as carbon fiber is used as a heat source that is easy to handle and less likely to break. In addition, the heat source configured in this way can be attached in any direction such as a horizontal direction or a vertical direction.

  Further, in the infrared light bulb and the heating device of the present invention, a part of the heat-resistant tube covering the heating element is bent as a movement preventing means, for example, the end of the heat-resistant tube is protruded inward, or the end of the heat-resistant tube In the present invention, a portion protruding inward is provided. However, in the present invention, any structure may be used as long as the heat-resistant tube can be fixed to the internal lead wire member, etc. , Etc. are included. As described above, by providing the movement preventing means on a part of the heat-resistant tube covering the heating element, it is possible to reliably cover a specific place of the heating part, and to ensure the insulation state with respect to the other heating elements. It becomes possible. As a result, in this invention, it becomes the structure by which the failure | damage of the heat generating body was suppressed. In addition, in order to raise the end surface intensity | strength of a heat-resistant pipe | tube, a strength improvement can be aimed at by deburring with respect to an end surface by deburring, heat processing, etc.

  In the infrared light bulb and the heating device of the present invention, an open structure in which the glass tube is not sealed can be used. The infrared light bulb and the heating device of the present invention configured as described above are composed of a heat generating material in which a plurality of heat generating elements can be used in the air, the heat generating elements have a flat surface, and the longitudinal directions thereof are arranged in parallel. It is arranged to become. And since the heat-resistant tube which covers at least one part of the selected heat generating body in a some heat generating body is provided in the glass tube, highly efficient thermal radiation with high directivity is performed from the plane of each heat generating body.

  Further, in the infrared bulb and the heating device of the present invention, the heating element includes molybdenum disilicide, lanthanum chromite, silicon carbide, nichrome, Fe (iron) -Cr (chromium) -AL (aluminum) alloy, stainless steel, etc. Is the body. The heating element configured as described above can be used in the air, and as a material capable of forming a plane, molybdenum disilicide, lanthanum chromite, silicon carbide, nichrome, Fe (iron) -Cr (chromium) -AL (aluminum) alloy, By using stainless steel or the like, radiation with high directivity can be performed, and the heating element temperature is increased by covering at least a part of the heating element with a heat-resistant tube. It is possible to realize a heating device using the.

  The infrared light bulb according to the present invention can be used as a small and highly efficient heat source, and a heating device using this infrared light bulb is useful as a heating means with high directivity.

The top view which shows the structure of the infrared bulb of Embodiment 1 which concerns on this invention The top view which shows the various structural examples of the 1st heat generating body in Embodiment 1 which concerns on this invention. Sectional drawing of the infrared bulb of Embodiment 1 which concerns on this invention Sectional drawing which shows the heat source of the heating apparatus of Embodiment 2 which concerns on this invention Sectional drawing which shows the other structure of the heat source of the heating apparatus of Embodiment 2 which concerns on this invention. Sectional drawing which shows the other structure of the heat source of the heating apparatus of Embodiment 2 which concerns on this invention. Sectional drawing which shows the other structure of the heat source of the heating apparatus of Embodiment 2 which concerns on this invention. Sectional drawing which shows the other structure of the heat source of the heating apparatus of Embodiment 2 which concerns on this invention. The figure which shows an example of a structure of the heating apparatus of Embodiment 2 which concerns on this invention. Sectional drawing of the heating apparatus of Embodiment 3 which concerns on this invention Sectional drawing of the heating apparatus of Embodiment 4 which concerns on this invention The figure which shows the control circuit of the heating apparatus of Embodiment 5 which concerns on this invention.

Explanation of symbols

1 Glass tube
2A, 2B Heating element 3A, 3B Holding block 5A, 5B Coil part 6A, 6B Spring part 7A, 7B Internal lead wire 8A, 8B Molybdenum foil 9A, 9B External lead wire 11A, 11B Internal lead wire member 12 Heat resistant tube
50, 51, 52, 53, 54 Reflector 55 Reflective film 56 Tube 90, 91, 92 Infrared light bulb

Claims (21)

A plate-shaped emitting heat having a plane,
A holding block fixed to both ends of the heating element; an internal lead wire member electrically connected to the holding block; and an external lead wire electrically connected to the internal lead wire member via a molybdenum foil; A heat generating structure, and
A glass tube in which a plurality of the heat generating components are accommodated, the heat generating components are arranged so that the longitudinal directions of the heat generating components are parallel, and the molybdenum foil is sealed in an embedded portion and filled with an inert gas. An infrared bulb comprising:
Inside the glass tube, a heat-resistant tube that houses at least a part of one heat-generating structure of adjacent heat-generating structures and is open at both ends is provided.
An infrared light bulb configured such that a fixing means provided at one end of the heat-resistant tube engages with the internal lead wire member so that the internal lead wire member is fixed inside the heat-resistant tube . A spiral spring portion is formed on a part of the internal lead wire member,
The fixing means is configured by an engagement portion that is an end portion bent to the inside of the heat-resistant tube or a convex portion protruding to the inside of the heat-resistant tube, and the spring portion and the engagement portion are engaged with each other. The infrared light bulb according to claim 1. A fixing tool is mounted inside the heat-resistant tube as the fixing means,
The infrared light bulb according to claim 1, wherein the fixture and the internal lead wire member are engaged to fix the internal lead wire member inside the heat-resistant tube. The infrared bulb according to any one of claims 1 to 3, wherein the heat-resistant tube is formed of a material having light transmittance in an infrared region. The plane of the plurality of heating elements are arranged facing the same direction, infrared ray lamp according to any one of claims 1 to 3 arranged such that each heating element is in close contact with the wall of said refractory tube . The infrared light bulb according to any one of claims 1 to 3, wherein a reflective film is formed on a part of the glass tube.   The infrared light bulb according to claim 6, wherein the reflective film is formed of a metal containing any one of gold, titanium nitride, aluminum, nickel, chromium, or aluminum oxide.   The infrared light bulb according to any one of claims 1 to 7, wherein the heating element includes a carbon-based substance and is a carbon-based heating element formed by firing.   The infrared light bulb according to any one of claims 1 to 7, wherein the heating element is a solid carbon-based heating element formed by firing, including a carbon-based substance and a resistance adjusting substance.   The infrared light bulb according to any one of claims 1 to 7, wherein the heating element is formed of a metal selected from molybdenum disilicide, lanthanum chromite, silicon carbide, nichrome, Fe-Cr-AL alloy, and stainless steel. . Having the infrared light bulb according to any one of claims 1 to 5,
A heating apparatus comprising a reflecting means that is disposed at a position facing a flat portion of the heating element and reflects heat radiated from the heating element . The reflecting means is a reflecting plate that reflects heat radiated from a flat portion of the heating element substantially in parallel, and the reflecting plate has a rectangular parallelepiped cross section perpendicular to the extending direction of the reflecting plate. heating apparatus according to claim 11 in which the center of the heating source configured by the plurality of heating elements at the focal point of the parabola is disposed Te. The infrared bulb has two heating elements,
The reflecting means is a reflecting plate that reflects heat radiated from the plane of the heating element substantially in parallel, and the reflecting plate has a longitudinal direction of the reflecting plate so that the center of each heating element is a focal point. The heating apparatus according to claim 11, wherein a cross section orthogonal to the cross section is configured in a shape combining two parabolic shapes. The reflection plate, the heating device according to claim 12, the convex portion protruding Oite the heating side to the central portion of the cross section perpendicular to the longitudinal direction is formed. The heating device according to claim 12 , wherein the reflection plate has a concavo-convex portion that irregularly reflects the heat radiated from the heating element at a central portion of a cross section perpendicular to the longitudinal direction. The heating apparatus according to claim 11, wherein a cylindrical tube is disposed so as to surround the glass tube of the infrared light bulb . A heating device having a control circuit including a power source,
A plurality of external terminals connected to respective external leads of the plurality of heat-generating structure,
Anda plurality of power supply terminals connected to said power supply,
The said control circuit is a heating apparatus as described in any one of Claims 11 thru | or 16 which selectively connects the said external terminal and the said power supply terminal, and connects the said heat-generation structure in series, parallel, or independently. The heating device according to claim 17 , wherein the control circuit is configured by on-off control, energization rate control, phase control, and zero-crossing control alone or in combination of at least two. The heating device according to any one of claims 11 to 18 , wherein the heating element is a carbon-based heating element that includes a carbon-based material and is formed by firing. The heating device according to any one of claims 11 to 18 , wherein the heating element is a solid carbon-based heating element formed by firing, including a carbon-based substance and a resistance adjusting substance. The heating device according to any one of claims 11 to 18 , wherein the heating element is made of a metal selected from molybdenum disilicide, lanthanum chromite, silicon carbide, nichrome, Fe-Cr-AL alloy, and stainless steel. .

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