KR20040074712A - Carbon fibers lamp heater - Google Patents

Abstract

PURPOSE: A carbon fiber lamp heater is provided to reduce manufacturing procedures by eliminating the need of using a member for coupling carbon fibers into a carbon body, and achieve improved durability of carbon fibers by coating the carbon fiber with a ceramic. CONSTITUTION: A carbon fiber lamp heater comprises a carbon body(10) having a predetermined length, and which is formed by twisting carbon fibers into bundles; a compressed unit(20) formed at both ends of the carbon body by compressing a mixed powder of graphite and copper in such a manner that one end of the carbon body is coupled to an end of a heat resistant terminal(22); and a connecting piece(21) coupled at the other end of the heat resistant terminal in such a manner that the connecting piece is disposed at an end of a planar terminal unit(3-1) which press-seals both ends of a closed container(3), wherein the connecting piece has an end where a lead wire(4) is coupled.

Description

Carbon fibers lamp heater

The present invention relates to a carbon yarn lamp heater, comprising a press-molded part pressed by a mixed powder of graphite and copper by placing separate heat-resistant terminals on both ends of the carbon body (carbon yarn) interwoven with each other, the heat-resistant terminal The and lead wires are related to the carbon heater lamp heater which enables the sealing of both ends of the vacuum hermetic container by mutually connecting the thermal fragments.

In general, a lamp is also called a light bulb, and may be used as a lamp for a heater that uses heat generated by heating a high temperature by flowing a current through a filament installed inside the vacuum tube. This may illustrate a configuration in which a filament is installed inside the vacuum state and a terminal connected to the filament is installed at both ends of the glass tube. In addition, when a tungsten platen is installed along the axis of the glass tube and the iodine gas is enclosed in the tube to send a current to the filament (when power is applied), the tungsten atoms generated in the filament are combined with iodine in the tube wall to become tungsten iodide and return to the filament. Here, it is used as a high efficiency lamp that can be used for a long time by a so-called iodine cycle that decomposes and leaves tungsten in the filament.

However, this type of lamp has a problem that the damage of the filament is weak to external impact, the durability is weak due to deformation of the shape due to heating, etc., there is a burden such as the cost of installing the coil.

On the other hand, carbon yarns used for surface heating elements and the like use carbon fiber bundles of fine thickness as a group. For example, if the carbon fiber consists of 26400 pieces, the resistance is about 60 ohms when the length is 1 meter and the diameter is 0.3 mm. Therefore, based on this design the desired output (watt) to produce a planar heating element. Of course, in this case, the resistance Where R is the resistance, rho is the resistivity, l is the length, and s is the unit area. However, these are used as a heat generating source of the planar heating element is mainly designed to dissipate the temperature of about 50 to 70 degrees, if there is a risk of fire, it is oxidized with air and the durability is significantly reduced.

On the other hand, a heater incorporating a carbon yarn as a heat source was developed in a vacuum tube. The carbon yarn is fixed in a bundle to provide a desired output, and the technology of fixing the carbon yarn to the terminal and the technology of focusing the carbon yarn. Due to this shortcoming, industrialization has been difficult. An example of such a technique is known as a carbon-based heating element disclosed in Japanese Patent Application Laid-Open No. 2000-123960, which has a cap-type electrode part 2 at both ends of the carbon-based heating element 1 as shown in FIG. 1. ) And the cap-shaped electrode part 2 are built in the vacuum-sealing container 3, and the cap-shaped electrode part 2 is made to connect the lead wire 4 to apply power. As shown in FIG. 2, the lead wire 4 is wound around the bundle outer circumference of the carbon-based carbon yarn 6 composed of a plurality of bundles with a carbon chamber 7 to form a fixed shape.

FIG. 3 is an exemplary view configured to provide a bundle of carbon yarns 6 necessary in this case. Each of the three strands wound around a certain bundle of carbon yarns 6 with a carbon yarn 7 and wound with a carbon yarn 7 is shown. It is shown the structure which winds together with carbon chamber 7 'and makes them integral.

That is, the carbon body 1 made of the unit carbon body 5 as shown in FIG. 2 or the plural carbon body 5 wound around the three carbon strands 5 as shown in FIG. 3 with the carbon chamber 7 'is used. Both ends are combined to form a cap-shaped electrode part 2 so as to cover the vacuum hermetic container 3.

However, this method uses the desired number of bundles of desired carbon yarns (6) to create the desired resistance value to use the desired output (W), but the hassle of having to bundle the carbon yarn (6) with the carbon chamber (7) there is a problem.

In addition, since the welding of the lead wire 4 is impossible due to the characteristics of the carbon body 1, a separate electrode part 2 for connection is provided, and the electrode part 2 is connected to both ends of the carbon body 1. There is a problem that requires a complicated process.

The present invention is to solve this problem, an object of the present invention is to use a carbon yarn (carbon company) used as a planar heating element as a heating source, and both ends of the carbon yarns are crimped by the heat-resistant terminal for connecting the lead wires and the injection of carbon and graphite to mutual conduction It is to provide a carbon lamp heater that prevents the durability degradation due to poor connection with the lead wire and improves the productivity.

Another object of the present invention is to provide a carbon yarn lamp having a surface of the carbon yarn coated with a ceramic to smooth the surface, thereby improving durability of the carbon yarn.

Still another object of the present invention is to provide a carbon yarn lamp which has improved durability by installing a heat resistant band having a predetermined thickness every predetermined length on the surface of the carbon yarn to reduce the impact with the inner wall of the vacuum sealed container.

To this end, the present invention is to create a carbon body by the carbon yarn consisting of a certain bundle of carbon yarn inside the glass tube, the heat-resistant terminal is placed on both ends of the carbon body by compression molding with a mixed powder of graphite and copper to solve the contact failure In order to reduce the impact with the inner wall of the vacuum-sealed container at every predetermined length of the carbon body, a heat-resistant band is provided.

1 is a configuration diagram of a typical carbon-based heating element,

FIG. 2 is an enlarged view of main parts of the carbon body used in FIG. 1; FIG.

3 is a view showing a state of binding using three carbon bodies of FIG.

4 is a configuration diagram of a carbon body used in the present invention;

5 is a cross-sectional view of main parts of the present invention;

6 is a cross-sectional view of the present invention;

7 is an enlarged sectional view taken along line A-A of FIG.

8 is an equivalent circuit diagram of FIG. 5.

Fig. 9 is an illustration of resistance values according to the number of strands of carbon yarn (carbon yarn) aggregates used in the present invention.

Explanation of symbols for the main parts of the drawings

3; vacuum hermetic container 3-1; flat terminal portion 6; carbon yarn 10; carbon body 11; first carbon yarn 12; second carbon yarn 13; third carbon yarn 20; press-molded portion 21; connecting piece 22; heat resistant terminal 30 Heat-resistant band

That is, the present invention is a heating lamp for an electric stove made of a built-in carbon body as a heating element in a vacuum glass tube (sealing container) to supply power to an external terminal,

Carbon body of fixed length which twisted and connected the carbon yarn which is carbon yarn with several bundles,

A compression molded part compressed by a mixed powder of graphite and copper so as to be combined with one end of the heat-resistant terminal at both ends of the carbon body;

It is to provide a carbon yarn lamp heater characterized in that it comprises a connecting piece for coupling to the other end of the heat-resistant terminal to come in one end of the flat terminal portion for pressing and sealing both ends of the vacuum and sealed container and the exposed lead wire to the other end.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Fig. 4 is an enlarged configuration of the main body of the carbon body forming the main part of the present invention. The carbon yarn 6, which is a carbon yarn made of a bundle, is divided into first to third carbon bundles 11, 12, and 13, and each is divided. The carbons (11, 12, 13) are mutually different, as if they were winning. Then, the carbon yarns 6 are grouped together in a predetermined length to form a carbon body (10).

FIG. 5 is a sectional view showing main parts of one end of the carbon yarn lamp heater constituting the present invention, and FIG. 6 is a sectional view of the carbon yarn lamp heater of the present invention.

Into the vacuum glass tube (sealing container) 3, the carbon body 10 is built into the heating element so that the power is supplied through the external lead wire 4,

A carbon body 10 having a predetermined length, in which carbon yarns 6, which are carbon yarns, are twisted together by several bundles,

A compression molded part 20 compressed by a mixed powder of graphite and copper so as to be combined with one end of the heat-resistant terminal at both ends of the carbon body 10,

The other end of the heat-resistant terminal 22 is coupled to one end of the flat terminal portion (3-1) for pressing and sealing both ends of the vacuum and sealed container (3) and comprises a connecting piece 21 for coupling the exposed lead wire to the other end.

The press-molded part 20 simply puts a mixed powder (100-200 mesh) of graphite and copper into a molding die of a predetermined space, and the carbon body 10 and heat resistance on both sides of the molding die. The terminal 22 is settled, and the carbon body 10 and the heat-resistant terminal 22 are integrally compressed to mutually conduct by pressing (50-100T) molding. In the present invention, the ratio of graphite to copper is good to achieve a ratio of 65 to 75 to 25 to 35. Graphite is intended to facilitate separation after compression molding after being put into a mold due to the characteristics of metal gloss and lubricating material. In view of the fact that copper is soft and has good adhesiveness and good binding strength, it is not easily separated after molding. Thus, when the ratio of graphite and copper is formed at a ratio of 65 to 75 to 25 to 35, binding and separation manufacturability are stably obtained. In addition, the present invention, the compression molded part 20 is made of a combination of other foreign matter than the carbon body 10 made of pure carbon components, the resistance is high, the amount of heat generated is small. In fact, when the calorific value of the carbon body 10 is about 900 degrees as shown in FIG. 8, the carbon body 10 may represent equivalently to generate heat of 100 to 200 degrees Celsius due to relatively low current flow. . That is, the heat generation of the carbon body 10 does not reach the press-molded portion 20, and at the same time, provides the effect of limiting the heat generation to the lead wire 4 to have the durability of the carbon lamp heater.

The heat resistant terminal 22 and the connecting piece 21 can be exemplified by the use of molybdenum. The molybdenum used in the present invention has a melting point of 2610 ° C., which is used for contacting electrical circuits or high temperature parts of heat resistant materials.

The carbon body 10 may be coated with a ceramic layer 40 to smooth the surface. The ceramic layer used in the present invention may be exemplified in the form of diluting the ceramic powder applied to the surface of the carbon body 10 in the form of glaze and firing to form the ceramic layer 40. The material of the ceramic layer used in the present invention is a ceramic ({Al} _ {2} {O} _ {3} + Zr {O} _ {2} + {Y} _ {2} {O} _ {3} ).

On the outer periphery of the carbon body 10, a heat-resistant band 30 for reducing the impact with the inner wall of the vacuum sealing container 3 is provided at regular intervals at every predetermined length.

The heat resistant band 30 is aluminum hydroxide.

FIG. 7 is a cross-sectional view taken along line AA of FIG. 6, and FIG. 8 is an equivalent circuit diagram of the carbon yarn lamp heater of the present invention, which is twisted with the first to third carbon yarns 11, 12, and 13 made of unit carbon yarns 6. On the outer circumference of the bonded carbon body 10 is coated with a ceramic layer 40 to smooth the surface, and on the outer circumference of the ceramic layer 40 the carbon body 10 at regular intervals in the longitudinal direction of the carbon body 10. The heat-resistant band 30 is formed to wind the outer circumference of the ring shape. The material of the heat resistant band 30 used in the present invention may be aluminum hydroxide (Al {(OH)} _ {3}), the gel-like aluminum hydroxide solution dissolved in water is fixed on the surface of the carbon body 10 Apply to thickness and dry to complete heat-resistant band.

9 is a table showing an example of the number of strands of the carbon yarn aggregate used in the present invention and the resistance thereto.

The carbon yarn assembly used in the present invention is installed in a vacuum glass tube (vacuum airtight container) so as to withstand high heat, and used as a surface heating element, so that the carbon yarn assembly can be used as a carbon heater lamp heater for an electric stove. Likewise, necessary outputs (watts) can be designed using the principle of the difference in the resistance value according to the number of strands and the extension of the length to increase the resistance value, and the increase in the number of carbon yarns to reduce the resistance value. In addition, the present invention is because the built-in carbon body 10 in the vacuum sealing container 3 of the glass tube, the oxidation of the carbon body 10 is basically blocked, so the durability is semi-permanent.

At the time of design, for example, when the power supply is 220 volts, the carbon aggregate is 60 ohms per meter, and the length is 1 meter, the output (watt) is ( ) Therefore, if the length is shortened or the thickness (number of carbon yarns) is adjusted with the basis of such output, various lamps of the same output can be manufactured by adjusting the length of the glass tube of the lamp. In fact, it was confirmed that heat was generated at 700 to 900 degrees, and the conditions sufficient for use as a heater were satisfied. This is because the inside of the glass tube 5 is a vacuum, the oxidation is fundamentally blocked, it is determined that the desired output can be provided by adjusting the resistance value according to the length.

In addition, according to the present invention, according to the first to third carbon yarns 11-13 consisting of a bundle of carbon yarns 6, the carbon yarns 6 having a predetermined bundle form the carbon body 10. In particular, the present invention may have a shape of picking up the carbon body 10 as shown in FIG. 4 or may be implemented by twisting a rope.

Another feature of the present invention is the configuration using the heat-resistant terminal 22, which forms a compression molded part 20 on both ends of the carbon body 10 and the carbon body 10 and the heat-resistant terminal 22 and the carbon body (10) By maintaining the binding force of)), the heat generated by the poor contact between the carbon body 10 and the heat-resistant terminal 22 is reduced, thereby reducing the heat generated at the contact portion with the terminal, and simply pressing and molding to improve productivity.

According to the present invention configured as described above, the heat-resistant terminals 22 are placed on both ends of the carbon body 10 so as to be placed in a mold having a size of a set of compression molded parts 20 (of course, one set of carbon in one compression molded part). The heat-resistant terminal may be pressed on the sieve 10, and then the heat-resistant terminal may be pressed on the other end of the carbon body 10). The press-molding is carried out at a pressure of 50-100T using a normal press machine. At this time, it is preferable to use a mixture of 100-200 mesh graphite and copper in a weight ratio of 65-75 to 25-35 as the material forming the compression molded part. When graphite exceeds 65-75 weight ratio, adhesiveness falls and it breaks easily, and when it is lower than this, compression molding is difficult. If the copper content exceeds 25-35 weight ratio, the characteristics of separation from the mold after compression at the time of molding is low, the production yield is low, and the heat resistance is also lower, if lower than this, the binder properties of copper is lowered and the moldability is poor.

In the above, the heat-resistant terminal 22 and the lead wire 4 are configured to be connected to each other via a connecting piece 21 having a predetermined size. The heat-resistant terminal 22 and the connecting piece 21 are molybdenum, and the lead wire 4 is tungsten. It is good to configure because the melting temperature of molybdenum is 2600 degrees Celsius, tungsten is high 3387 degrees.

Then, as described above, the heat-resistant terminal 22 is formed at both ends of the carbon body 10 in the compression molding part 20, and previously, at the other end of the heat-resistant terminal 22, the lead wires are connected through the connecting pieces 21 of molybdenum. 4) (spot welding) (Of course, the heat-resistant band 10 of aluminum hydroxide is formed at a predetermined length on the outer periphery of the carbon body 10). The molded product is placed in a circular pipe (with a vacuum suction tube as well as a pipe in the middle of the length) in a state in which both ends are opened, and both ends are heated to 1800-2000 degrees and pressed, so that both ends are in close contact with each other as shown in FIG. It forms the terminal part 3-1, and the center part is shape | molded so that space may remain intact. In particular, the present invention adopts a method using the heat-resistant terminal 22, so that the connection piece 21, even if the space area due to the lead wire (4) is wide when making a vacuum by pressing after cooling to form the flat terminal portion (3-1) It is thin and has good adhesiveness, so it functions to keep the outside air from being blocked when it is vacuumed. In addition, the use of the heat-resistant terminal 22 is to prevent the carbon body 10 exposed to oxygen from being oxidized and directly heated when the end of the glass tube is heated to form the planar terminal portion 3-1. That is, by directly applying the heat to be heated to the heat-resistant terminal 22 (since molybdenum has a melting temperature of 2600 degrees, even if the glass tube is heated to 1800-2000 degrees has heat resistance) that the direct heat transfer to the carbon body 10 It prevents the carbon body 10 from being damaged during manufacture to increase the production yield. Of course, when the shaping of the flat terminal portion 3-1 is completed, the inside air is sucked through the auxiliary pipe for forming a vacuum (not shown) to create a vacuum, and then cut and blocked to complete the vacuum sealing container 3.

The present invention manufactured as described above has a configuration as shown in FIG. 6, when power is applied to both ends of the lead wire 4, the lead wire 4 having high resistance, the connection piece 21, the heat resistant terminal 22, and the crimping molded part 20. Intensive heat generation in the carbon body 10 having a relatively low resistance rather than) is used as a heater using this. For example, when the power supply is 220 volts, the carbon aggregate has a resistance of 60 ohms per meter, and the length is 1 meter, the output (watts) is ( ) Therefore, it is possible to manufacture various lamps of the same output by shortening the length or adjusting the thickness (number of carbon yarns) and adjusting the glass tube length of the lamp with the basis of such output. In fact, it was confirmed that the heat generation of 700-900 degrees Celsius, in the present invention, the compression molded part 20 maintains the heat generation 100-200 degrees Celsius, and provides a significant difference in heat generation, which is a heat-resistant terminal (22) ), The heat generation is reduced through the connecting piece 21 and the lead wire 4 to reduce the consideration of the heat-resistant design in use to provide convenience in the use of the product.

In addition, the present invention prevents the inner wall of the vacuum-sealing container 3 and the carbon body 10 directly contact with each other because the flexible heat resistant band 30 is wrapped at a predetermined length even when the carbon body 10 is partially stretched in use. Improve. In addition, since the carbon body 10 used in the present invention is coated with a ceramic having heat resistance, the surface is smooth to improve heat generation and durability.

The present invention described above is not limited to the above-described embodiments and drawings, and various permutations, modifications, and changes can be made without departing from the technical spirit of the present invention. It will be apparent to those who have

As described above, the present invention manufactures a lamp using carbon yarn aggregates (carbon yarns), and separates carbon yarns into several carbon yarns to form carbon bodies in a kind of dendrite form. Since it is used as a heating element of the head lamp, the manufacturing process is simplified because no separate means for combining carbon yarns with carbon is required.

In addition, the present invention by coating the surface of the carbon yarn with a ceramic to smooth the surface to improve the durability of the carbon yarn.

In addition, the present invention by installing a heat-resistant band of a predetermined thickness every predetermined length on the surface of the carbon yarn to reduce the impact with the inner wall of the vacuum sealing container to improve the durability.

In addition, the present invention has a heat-resistant terminal at both ends of the carbon yarn and the compression molded parts made of carbon and graphite are bonded to each other, so that no additional bonding means is required, the productivity is improved, and the resistance of the press-molded part is high, so that the heat generation is low. It prevents the transfer of heat to the lead wires to provide stability of the lamp heater.

Claims (5)

In a heating lamp for an electric stove made of a carbon element as a heating element in a vacuum glass tube (sealing container) to supply power to an external terminal. A carbon body 10 of a predetermined length, in which carbon yarns 6, which are carbon yarns, are twisted together by several bundles, and A compression molded part 20 compressed by a mixed powder of graphite and copper so as to be combined with one end of the heat-resistant terminal at both ends of the carbon body 10, A connection piece 21 coupled to one end of the planar terminal part 3-1 for pressing and sealing both ends of the vacuum and sealed container 3 at the other end of the heat-resistant terminal 22 and coupling the exposed lead wire to the other end. Carbon company lamp heater made with. The carbon heater lamp heater according to claim 1, wherein the heat-resistant terminal (22) and the connecting piece (21) use molybdenum. 2. The carbon yarn lamp heater according to claim 1, wherein the terminal body (10) is coated with a ceramic layer (40) to smooth the surface. The carbon yarn lamp according to claim 1, wherein a heat-resistant band (30) for reducing the impact with the inner wall of the vacuum sealing container (3) is repeatedly installed at a predetermined length on the outer periphery of the carbon body (10) at regular intervals. heater. 2. The carbon yarn lamp heater according to claim 1, wherein the heat resistant band (30) is aluminum hydroxide.