JP2005302645A - Heating element structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heating element structure formed by fixing and holding a heating element made of soft carbon fiber so as to efficiently radiate heat in compliance with the shape of various enveloping glass tubes, capable of preventing the enveloping glass tube from breakage caused by thermal distortion. <P>SOLUTION: The heating element 1, composed of a plurality of bundled or twisted carbon fibers; and a flexible insertion body 4 composed of a plurality of transparent or translucent glass insertions 3 fitted to the outside of the heating element tied in a row, having a hole part 2, into which the heating element is inserted; are inserted into a hollow chamber 5 of the enveloping glass tube 6 which is in a state of vacuum, or in which, inert gas is sealed. The glass insertions 3 are formed into a cylinder shape. A conductive elastic member 7 electrically connected to an external power source is connected to either end part of the heating element 1. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a heat generating structure, and more particularly to a heat generating structure using a carbon fiber suitable for a home heater as a heat generating element.

2. Description of the Related Art Conventionally, for example, a heat generation structure used for a household heater is known using a halogen lamp (see, for example, Patent Document 1).
Patent Document 1 discloses a heat generating structure with a reflector including an inverted water droplet type (inverted type) halogen lamp and a parabolic reflector for reflecting the heat of the halogen lamp.

However, in the heat generating structure using the halogen lamp as disclosed in Patent Document 1, the inrush current at the time of turning on the power is considerably large as about 8 times the rated current. Therefore, there is a problem that countermeasures against overcurrent are required, and the cost of the parts is increased accordingly. In addition, there is a problem in that far-infrared radiation efficiency is smaller than power consumption.
Therefore, the present inventor has already proposed a carbon lamp heater (heating structure) that has a far infrared radiation amount larger than that of a halogen lamp, consumes less power, and can simplify a current protection circuit. -301397.
As shown in FIG. 9, a conventional carbon lamp heater (heat generating structure) condenses a plurality of carbon fibers to form a heating element 31, and the heating element 31 is inserted into the hollow chamber 35 of the jacket glass tube 36. It is installed. Since the heating element 31 is soft and can be easily bent, the outer glass tube 36 having various shapes can be easily inserted and installed in the hollow chamber 35.
JP 2002-22185 A

However, in the conventional carbon lamp heater (heat generating structure) shown in FIG. 9, since the heat generating element 31 is soft, it is difficult to fix and hold the heat generating element 31 in a shape corresponding to the hollow chamber 35 of the outer glass tube 36. Met. Accordingly, there is a problem that it is difficult to fix and hold the heating element 31 in a shape that efficiently generates heat.
Further, in the conventional carbon lamp heater (heat generating structure) shown in FIG. 9, the soft heating element 31 may be bent excessively, and the heating element 31 may come into contact with the wall surface forming the hollow chamber 35 of the jacket glass tube 36. There was an inconvenience that there was. In addition, when the wall surface forming the hollow chamber 35 and the heating element 31 are in contact with each other, there is a problem that the temperature of the outer glass tube 36 in the contacted portion is excessively increased locally. In this case, the outer glass tube 36 has a problem that heat distortion occurs between the high temperature portion and the low temperature portion, and as a result, the outer glass tube 36 is broken.

  Accordingly, the present invention fixes and holds a soft carbon fiber heating element in a shape that efficiently generates heat corresponding to various shapes of the outer glass tube, and also breaks the outer glass tube due to thermal strain. An object is to provide a heat generating structure that can be prevented.

  In order to achieve the above object, a heating structure according to the present invention has a heating element in which a plurality of carbon fibers are focused or twisted, a hole through which the heating element is inserted, and is connected to the heating element in a daisy chain. A hollow glass tube having a hollow chamber in which a flexible insert having a plurality of transparent or translucent glass interposing bodies fitted in a shape is placed in a vacuum state or in an inert gas sealed state Inserted and installed indoors.

Moreover, the glass interposition body is formed in the cylindrical shape.
Moreover, it is preferable that a glass interposition body is formed in polygonal cylinder shape or substantially spherical shape.
In addition, conductive elastic members that are electrically connected to an external power source are connected to both ends of the heating element.

According to the heat generating structure according to the present invention, the soft carbon fiber heat generating element can be held and disposed in a shape corresponding to various shapes of the outer glass tube.
In addition, it is possible to prevent the envelope glass tube from being damaged due to thermal strain, and it is possible to safely use a carbon fiber that is less likely to be deteriorated as a conductor than metal and has a large radiant heat as a heating element.
In addition, even if the glass intercalator fitted on the heating element contacts the wall surface forming the hollow chamber of the envelope glass tube, there is no possibility that the envelope glass tube will be damaged due to thermal strain. .

In addition, after the energization of the heating element is started, heat can be quickly transmitted through the glass interposing body that comes into contact with the heating element.
Further, by sequentially inserting the glass interposer into the hollow chamber of the jacket glass tube, the heating element can be disposed in the hollow chamber, and the heating element is inserted into the hollow chamber of the jacket glass tube. The workability at the time can be improved.
Further, the heating elements can be evenly arranged over the entire hollow chamber.

In addition, by forming the glass interposer into a cylindrical shape, a polygonal cylindrical shape, or a substantially spherical shape, the flexible insert can be more easily accommodated in the hollow chamber of the envelope glass tube corresponding to various shapes of the envelope glass tube. Insertion can be installed.
In addition, since the glass insert of the flexible insert can be prevented from vigorously contacting the wall surface forming the hollow chamber, it is possible to suppress the breakage of the outer glass tube and the glass insert. Can do.

Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments.
FIG. 1 is a front view of a heat generating structure showing an embodiment of the present invention, and FIG. 2 is a partially enlarged sectional front view thereof. FIG. 3 is an enlarged cross-sectional side view of the heat generating structure, and FIG. 4 is a perspective view of the glass interposer.
The heat generating structure according to an embodiment of the present invention is used for a household heater, for example.
The heat generating structure according to the present invention includes a heat generating element 1, a plurality of glass interposing bodies 3, and a substantially annular outer glass tube 6.

The heating element 1 is formed by twisting a plurality of (many) carbon fibers, for example, and is a soft material that can be easily bent by the power of a human hand. The heating element 1 is formed by twisting a plurality of (multiple) carbon fibers so that the carbon fibers are more tightly coupled to each other than a bundle of carbon fibers and are not easily loosened. The heating element 1 can be freely formed by simply bundling a plurality (multiple) of carbon fibers. 2 and 3 exemplify a case where three unit yarns obtained by twisting (or bundling) a large number of carbon fibers are produced and twisted.
The plurality of glass interposing bodies 3 are made of transparent or translucent quartz glass that can withstand high temperatures, and are formed in a cylindrical shape. The glass interposing bodies 3 have holes 2 through which the heating elements 1 are inserted. And the glass interposition bodies 3 ... are externally fitted to the heating element 1 in the form of a daisy chain to form the heating element 1 and the flexible insert 4. The glass interposers 3 can easily correspond to the length of the heating element 1 by addition and extraction, and can easily adjust the distance between the adjacent glass interposers 3 and 3. Is possible.

The envelope glass tube 6 includes a curved cylindrical tubular portion 8 having a hollow chamber 5 inside, and flat plate-shaped sealing ends 9 and 9 located at both ends of the tubular portion 8. doing.
The flat sealing end portions 9, 9 are formed by thermocompression bonding of both end portions of the cylindrical portion 8 having a curved cylindrical shape. By forming the flat sealing end portions 9 and 9, the hollow chamber 5 of the cylindrical portion 8 is hermetically sealed.
The hollow chamber 5 is in a vacuum state or an inert gas sealed state. The flexible insert 4 is inserted and installed in the hollow chamber 5.
The glass inserts 3 of the flexible insert 4 are preferably cylindrical when the cylindrical portion 8 of the jacket glass tube 6 is cylindrical, but may be formed in other shapes. Be free. For example, it is also preferable to form the glass interposers 3 in a polygonal cylindrical shape as shown in FIG. 5 or a substantially spherical shape as shown in FIG. 6 according to the shape of the cylindrical portion 8 of the jacket glass tube 6.

  Further, a rectangular plate-like fixing portion 10 is embedded in each of the flat sealing end portions 9, 9. The conductive elastic member 7 is fixed to the fixing portion 10 through a hole provided in the fixing portion 10. The elastic member 7 is electrically connected to an external power source (not shown) and communicates from the outside of the jacket glass tube 6 into the hollow chamber 5 of the cylindrical portion 8. The elastic member 7 is linear from the outer side of the jacket glass tube 6 to a predetermined position entering the hollow chamber 5 of the cylindrical portion 8, but the tip is coiled.

Inside the coiled portion of the elastic member 7, a conductive and substantially cylindrical sandwiching portion 11 that sandwiches the end of the heating element 1 of the flexible insert 4 is inserted. More specifically, the sandwiching part 11 is formed in a substantially semi-cylindrical shape, and a half-divided body 12 in which a convex part 12a is formed on a plane part continuous with the circumferential edge of the curved surface part, and a substantially semicircular shape The halved body 13 is formed in a columnar shape and has a concave portion 13a formed in a flat portion continuous with the circumferential edge of the curved curved surface portion. And the half body 12 and the half body 13 are the states of the elastic member 7 in a state where the heating element 1 is sandwiched between the flat surface portion where the convex portion 12a is formed and the flat surface portion where the concave portion 13a is formed. It is inserted inside the coiled part. As a result, both end portions of the heating element 1 (flexible insert 4) are connected to the elastic member 7 via the clamping portion 11, respectively. Further, the elastic member 7 is configured to have a function of a lead wire that supplies power from an external power source (not shown).
In addition, the elastic member 7 is not limited to a coil shape, and other shapes may be used freely. For example, it is preferable to use a bamboo spring.

Next, a procedure for assembling the heat generating structure according to the embodiment of the present invention will be described.
First, a plurality of glass interposers 3... Are sequentially fitted in a daisy chain shape to a heating element 1 formed by twisting a plurality of carbon fibers, thereby forming a flexible insert 4. Next, the flexible insert 4 is inserted into the hollow chamber 5 of the outer glass tube 6 before the sealed end portions 9 and 9 are formed. At this time, the glass interposing bodies 3 are bent so as to follow the shape of the hollow chamber 5 of the jacket glass tube 6 and are disposed in the hollow chamber 5. And the clamping part 11 and the elastic member 7 are connected to the both ends of the flexible insertion body 4, respectively, and the rectangular plate-shaped adhering part 10 is attached to the elastic member 7. Then, on one end portion side of the flexible insert 4, the outer glass tube 6 is thermocompression-bonded so as to form the one sealed end portion 9 so that the fixing portion 10 is embedded. . Then, the hollow chamber 5 is placed in a vacuum state or an inert gas sealed state, and the outer glass tube 6 is heated so that the fixed portion 10 is embedded on the other end side of the flexible insert 4. The other sealed end 9 is formed by pressure bonding. Thus, a heat generating structure is formed.

FIG. 7 is a front view of a heat generating structure showing a second embodiment of the present invention.
The heat generating structure according to the second embodiment of the present invention exemplifies a case where the installation form of the flexible insert 4 inserted and installed in the hollow chamber 5 of the outer glass tube 6 is different from that of the first embodiment. doing. That is, in the first embodiment, the heat generating structure is configured such that the heat generating element 1 of the flexible insert 4 is disposed substantially along the central axis of the substantially annular outer glass tube 6. In the second embodiment, the heat generating structure is configured so that the flexible insert 4 is bent in a zigzag manner in a partial region of the hollow chamber 5 of the jacket glass tube 6. If comprised in this way, the heating structure can be easily comprised so that the heat_generation | fever effect may become large only in the one part area | region among the jacket glass tubes 6 using the one flexible insertion body 4. FIG. . Further, as compared with the method for installing the flexible insert 4 of the first embodiment, the operation for inserting and installing the flexible insert 4 in the hollow chamber 5 does not become excessively complicated.

  In addition, as shown in FIG.1 and FIG.7, in 1st embodiment and 2nd embodiment, the case where the jacket glass tube 6 was a substantially annular type was illustrated, It can be freely formed into a shape. For example, the outer glass tube 6 is formed in various shapes such as the inverted water drop type (similar to the inverted type) shown in FIG. 8A, the coil type shown in FIG. 8A, and the meandering type shown in FIG. It is also free to do. Further, the outer glass tube 6 may be linear.

  As described above, the heat generating structure according to the present invention has a heat generating body 1 in which a plurality of carbon fibers are focused or twisted, and a hole portion 2 through which the heat generating body 1 is inserted, and is connected to the heat generating body 1 in a rosary shape. An outer glass tube 6 having a hollow chamber 5 in which a flexible insert 4 having a plurality of transparent or translucent glass interposing bodies 3. Therefore, the glass interposers 3 can be configured to function as spacers between the heating element 1 and the hollow chamber 5 of the outer glass tube 6. As a result, the soft carbon fiber heating element 1 can be held and arranged in a shape corresponding to various shapes of the jacket glass tube 6.

  Further, since the glass interposing bodies 3 function as spacers between the heating element 1 and the hollow chamber 5 of the jacket glass tube 6, the wall surfaces forming the hollow chamber 5 of the heating element 1 and the jacket glass tube 6 Can be configured not to contact directly. Thereby, it is possible to prevent the temperature of the coated glass tube 6 in the contacted portion from excessively rising due to contact between the heating element 1 and the wall surface forming the hollow chamber 5 of the coated glass tube 6. it can. As a result, it is possible to prevent thermal strain from occurring between the high temperature portion and the low temperature portion of the envelope glass tube 6, so that damage to the envelope glass tube 6 due to thermal strain is prevented. A carbon fiber that can be prevented, is less likely to deteriorate as a conductor than metal, and has large radiant heat can be used safely as the heating element 1.

  Further, even if the glass interposers 3 fitted to the heating element 1 come into contact with the wall surface forming the hollow chamber 5 of the envelope glass tube 6, the temperature of the envelope glass tube 6 in the contacted portion is not reduced. Since it does not rise excessively locally, there is no possibility that the envelope glass tube 6 is damaged due to thermal strain. Further, by fitting a transparent or translucent glass interposer 3 to the heating element 1, heat is quickly transmitted through the glass interposer 3 in contact with the heating element 1 after the energization of the heating element 1 is started. It can be constituted as follows.

Further, by sequentially inserting the glass interposing bodies 3... Into the hollow chamber 5 of the jacket glass tube 6, the heating element 1 contacts the wall surface forming the hollow chamber 5 of the jacket glass tube 6. The heating element 1 can be disposed in the hollow chamber 5 without worrying. Thereby, workability | operativity at the time of inserting the heat generating body 1 in the hollow chamber 5 of the jacket glass tube 6 can be improved.
Further, by sequentially inserting the glass interposing bodies 3... Into the hollow chamber 5 of the jacket glass tube 6, the heating element 1 contacts the wall surface forming the hollow chamber 5 of the jacket glass tube 6. Without worrying, the heating element 1 can be evenly arranged over the entire hollow chamber 5.

  Further, the transparent or semi-transparent glass interposer 3 is externally fitted to the heating element 1 so that the light of the heating element 1 is further transmitted to the outside as compared with the case where a colored one is used. can do. Thereby, the operating state of the heat generating structure can be easily confirmed from the outside by the color change due to the temperature change of the heat generating element 1.

  Further, by forming the glass interposers 3 in a cylindrical shape, a polygonal cylindrical shape, or a substantially spherical shape, the flexible insert 4 can be attached to the outer glass tube 6 in accordance with various shapes of the outer glass tube 6. It can be inserted and installed more easily in the hollow chamber 5.

  Further, by connecting conductive elastic members 7 that are electrically connected to an external power source to both ends of the heating element 1, they approach the wall surface forming the hollow chamber 5 of the jacket glass tube 6. When the flexible insert 4 is about to move in the direction, it can be configured such that a resilient urging force is generated in a direction to return the flexible insert 4 to its original position. Thereby, when the heat generating structure is greatly shaken, it is possible to prevent the glass interposers 3 of the flexible insert 4 from vigorously contacting the wall surface forming the hollow chamber 5. As a result, the glass inserts 3 of the flexible insert 4 are vigorously brought into contact with the wall surface forming the hollow chamber 5, thereby preventing the outer glass tube 6 and the glass inserts 3 from being damaged. can do.

It is a front view of a heat generating structure showing an embodiment of the present invention. It is a partially expanded sectional front view of a heat generating structure. It is an expanded sectional side view of a heat generating structure. It is a perspective view of a glass interposition body. It is a perspective view of another glass interposition body. It is a perspective view of another glass interposition body. It is a front view of the heat generating structure which shows other embodiment. It is a front view which shows the shape of various jacket glass tubes. It is a partially expanded sectional front view for demonstrating the problem of the conventional heat generating structure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Heat generating body 2 Hole part 3 Glass interposing body 4 Flexible insertion body 5 Hollow chamber 6 Outer glass tube 7 Elastic member

Claims (5)

  A heating element (1) obtained by converging or twisting a plurality of carbon fibers, and a hole (2) through which the heating element (1) is inserted, and are externally fitted in a daisy chain to the heating element (1). An outer glass tube having a hollow chamber (5) in which a flexible insert (4) provided with a plurality of transparent or translucent glass interposers (3) is in a vacuum state or in an inert gas sealed state A heating structure characterized by being inserted and installed in the hollow chamber (5) of (6).   The heating structure according to claim 1, wherein the glass interposing body (3) is formed in a cylindrical shape.   The heating structure according to claim 1, wherein the glass interposing body (3) is formed in a polygonal cylindrical shape.   The heating structure according to claim 1, wherein the glass interposing body (3) is formed in a substantially spherical shape.   The heat generating structure according to claim 1, 2, 3, or 4, wherein a conductive elastic member (7) electrically connected to an external power source is connected to both ends of the heat generating body (1).

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