KR102654849B1 - Carbon fiber heating element - Google Patents

Abstract

The present invention relates to carbon fiber heating elements. The present invention, in an embodiment, includes a core made of carbon fiber, electrodes are connected to both ends of the core, a heating portion configured to generate heat in the core as electricity is applied to the electrode, a space is formed therein, and the heating portion is inserted. A housing part having an open inlet so that the heating part is disposed therein, and the heat generating part being disposed in the housing part, fills the space inside the housing part, has insulation and conductivity, and heat generated from the heating part. A carbon fiber heating element including a heat transfer unit that transfers heat to the housing unit is presented.

Description

Carbon fiber heating element

The present invention relates to a heating element using carbon fiber, and more specifically, to a carbon fiber heating element that can be used as a heating and heat source in greenhouses, livestock sheds, electric boilers, electric water heaters, electric fryers, etc.

In general, stoves or boilers emit or radiate high-temperature heat to increase the temperature, allowing heating or hot water to be used. These devices are mainly used to obtain high temperatures by using combustion heat through the combustion of coal, oil, or natural gas, or by using the resistance heat of a heating element using electricity.

Recently, due to environmental pollution problems such as air pollution, depletion of raw materials, and rising raw material costs, the use of boilers using coal and oil as raw materials is gradually decreasing, but the use of devices using electricity is increasing.

Electric stoves and boilers are mainly used to utilize resistance heat generated by applying current to a heating element made of metal with high electrical resistance, such as nichrome wire, in the form of a coil. However, these conventional heating elements require a strong current to flow to generate heat above a certain temperature, and it takes a long time to generate heat, resulting in high power consumption.

In addition, due to the nature of the metal coil, when a strong current flows, not only does electromagnetic interference (EMI) harmful to the human body occur, but when used for a long time, electrical accidents such as disconnection of the heating element, short circuit, electric shock, and fire due to overheating may occur.

Republic of Korea Patent No. 10-2185844 (2020.11.26)

The present invention uses carbon fiber as a heating material to construct a heating unit, and provides an insulating and conductive heat transfer part between the heating unit and a housing unit surrounding the outside of the heating unit, so that the heat generated from the heating unit is safely and efficiently transferred to the housing unit. We present a carbon fiber heating element that enables heat transfer.

Other detailed purposes of the present invention will be clearly understood and understood by experts or researchers in this technical field through the detailed contents described below.

In order to solve the above problem, the present invention, as an embodiment, includes a core made of carbon fiber, electrodes are connected to both ends of the core, a heating unit configured to generate heat in the core as electricity is applied to the electrode, and a space therein. A housing part is formed and has an open inlet so that the heating part can be inserted, and the heating part is placed inside the housing part, and the heating part is placed in the housing part, and the space inside the housing part is filled and insulated and conductive. and includes a heat transfer unit that transfers heat generated from the heating unit to the housing unit.

Here, the heating unit includes a passage member formed in the shape of a tube with an empty center, a core wound around the outside of the passage member and generating heat by electricity, and a first electrode connected to one end of the core to supply electricity. and a second electrode disposed to pass through the interior of the passage member and connected to the other end of the core to supply electricity.

In addition, the heating unit further includes a cover member that has an outer shape and a space therein, and the passage member with the core wound is disposed inside the cover member, and the first electrode and the second electrode are connected to the cover member. It may be connected to the outside of the cover member.

Additionally, the space inside the cover member may be filled with a filler material that has insulating and conductive properties and moves heat generated in the core.

Meanwhile, the heating part includes a core that is wound and generates heat by applying electricity, a first electrode connected to one end of the core to supply electricity, a second electrode connected to the other end of the core to supply electricity, and an external shape. It may include a cover member in which a space is formed inside, the core is disposed therein, and the first electrode and the second electrode are connected to both sides, respectively.

Additionally, heat dissipating paint may be coated on the outer surface of the above-described cover member.

Meanwhile, the housing portion may include a body in the shape of a tube with an empty center inside which the heating unit is disposed, and a heat dissipation member arranged in contact with the outer periphery of the body and formed in the shape of a plurality of plates protruding at regular intervals. there is.

Here, both ends of the body are open, and with the heating unit disposed, the ends may be sequentially closed with an insulating material and a sealing material.

Meanwhile, the heat transfer unit may be made of metal powder or inorganic powder with high thermal conductivity.

The carbon fiber heating element according to an embodiment of the present invention uses carbon fiber as a heating material and has high thermal efficiency because heat generated from the carbon fiber can be quickly transferred to the housing through a conductive heat transfer part. In addition, since the heat transfer part has insulation properties, it can respond to disconnection, short circuit, electric shock, and overheating of the heating element, thus providing excellent safety.

Meanwhile, when connecting electrodes to the core, two electrodes can be placed in one direction by connecting the electrodes as is to one side of the core and placing another long electrode through the empty space in the center of the passage member on the other side of the core. . Accordingly, it is possible to apply electricity to both ends of the core from one direction and at the same time prevent interference between the two electrodes.

At this time, the heating unit can be formed in a simple form in which electrodes are arranged in both directions by connecting electrodes to both ends of the core without a passage member.

Meanwhile, by further providing a cover member surrounding the outside of the core in the heating part, damage to the core can be prevented by preventing the core from coming into direct contact with the heat transfer part. In addition, by filling the inside of the cover member with a filler having insulating and conductive properties, the insulating state of the core can be secured and at the same time, heat generated in the core can be quickly transferred to the cover member. At this time, by coating the outer surface of the cover member with a heat dissipating paint, heat can quickly spread from the heating part to the heat transfer part, thereby raising the temperature in a short time.

Meanwhile, the housing part is composed of a body made of a metal pipe and heat dissipation members that protrude at regular intervals along the outer circumference of the body, making it easy to manufacture and expanding the surface area, making it possible to emit a lot of heat at the same time. In addition, it is possible to completely seal the housing in a simple manner by sequentially closing the open ends on both sides of the body with insulation and sealing materials.

Meanwhile, by constructing the heat transfer unit with inorganic powder with high thermal conductivity, the heat transfer unit with high conductivity and insulation can be easily constructed.

Other effects of the present invention will be readily apparent and understood by experts or researchers in the technical field through the specific details described below or during the process of implementing the present invention.

1 is a perspective view of a carbon fiber heating element according to an embodiment of the present invention.
Figure 2 is an exploded perspective view of the carbon fiber heating element according to the embodiment shown in Figure 1.
Figure 3 is a detailed view of the internal structure of the heating unit employed in the embodiment shown in Figure 1.
Figure 4 is a perspective view showing a first form of a heating unit employed in the embodiment shown in Figure 1.
Figure 5 is a perspective view showing a second form of a heating unit employed in the embodiment shown in Figure 1.
Figure 6 is a perspective view showing a third form of the heating unit employed in the embodiment shown in Figure 1.
Figure 7 is an exploded perspective view of a carbon fiber heating element according to another embodiment of the present invention.

The features and effects of the present invention described above will become more apparent through the following detailed description in conjunction with the accompanying drawings, and accordingly, those skilled in the art will be able to easily implement the technical idea of the present invention. You will be able to. Since the present invention can be subject to various changes and can have various forms, specific embodiments will be illustrated in the drawings and described in detail in the text. However, this is not intended to limit the present invention to a specific disclosed form, and should be understood to include all changes, equivalents, and substitutes included in the spirit and technical scope of the present invention. The terms used in this application are only used to describe specific embodiments and are not intended to limit the invention.

Hereinafter, the carbon fiber heating element 100 according to an embodiment of the present invention will be described in detail with reference to the drawings. In this specification, similar reference numbers are assigned to identical and similar configurations even in different embodiments, and the description is replaced with the first description.

The carbon fiber heating element 100 according to an embodiment of the present invention includes a heating part 1, a housing part 2, and a heat transfer part 3.

The heating unit 1 includes a core 13 made of carbon fiber. Electrodes are connected to both ends of the core 13, and when electricity is applied to these electrodes, heat is generated in the core 13.

The housing portion 2 has a space formed therein and has an open inlet through which the heating portion 1 can be inserted. The heating unit 1 is placed inside the housing unit 2 through this open inlet. The open entrance of the housing portion (2) is sealed after the heating portion (1) is disposed.

The heat transfer unit 3 is filled in the space inside the housing unit 2 when the heating unit 1 is disposed in the housing unit 2 and has insulating and conductive properties. Accordingly, the heat generated in the heating unit (1) can be transferred to the housing unit (2).

As such, the carbon fiber heating element according to an embodiment of the present invention uses carbon fiber as a heating material and has high thermal efficiency because heat generated from the carbon fiber can be quickly transferred to the housing through a conductive heat transfer part. In addition, since the heat transfer part has insulation properties, it can respond to disconnection, short circuit, electric shock, and overheating of the heating element, thus providing excellent safety.

Accordingly, it is suitable for use in heating purposes such as livestock farms, poultry farms, and greenhouses, or as a heating element in boilers.

Hereinafter, the configuration of each part will be described in detail with reference to the drawings.

FIG. 1 is a perspective view of a carbon fiber heating element according to an embodiment of the present invention, FIG. 2 is an exploded perspective view of this carbon fiber heating element, and FIG. 3 is a detailed diagram of the internal structure of a heating portion employed in this carbon fiber heating element.

The heating unit 1 functions to generate heat by passing electricity and includes a passage member 11, a core 13, a first electrode 14, and a second electrode 15.

The passage member 11 is shaped like a tube with an empty center. Referring to the drawing, the passage member 11 is a transparent cylindrical glass tube with a long passage from one end to the other, and the second electrode 15, which will be described later, is installed to pass through this passage.

This passage member 11 prevents contact between the second electrode 15 and the core 13 and prevents the second electrode 15 from being overheated by the core 13. It can act as a support that can be wound.

The core 13 is wound around the outside of the passage member 11 and generates heat by applying electricity. Referring to the drawing, the core 13 is formed in a coil shape and the passage member 11 is inserted and disposed in the internal space.

Meanwhile, the core 13 is made of a plurality of carbon fiber bundles twisted together. The twist of the core 13 may have various yarn twist forms, such as 2-row twist, 3-row twist, 4-row twist, 8-row twist, etc. As the number of carbon fibers forming a bundle and the number of twisted carbon fiber bundles increase, the amount of heat generated increases. Additionally, the more the carbon fiber bundles are twisted, the more solid the core 13 can be maintained. Using this method, the core 13 can be formed by twisting 2000 to 3000 strands of carbon fiber.

Meanwhile, the core 13 may be impregnated with a dispersion of a heat-resistant material while wound around the passage member 11. For example, polytetrafluoroethylene (PTFE) may be used as the heat-resistant material. Afterwards, the passage member 11 around which the core 13 is wound is heat treated to carbonize the core 13 and can be used.

Additionally, the resistance of the core 13 can be adjusted depending on the length and thickness of the core 13, and the amount of electrical energy generated from the core 13 can be adjusted. Accordingly, the temperature of the heat generated in the core 13 can be adjusted.

The first electrode 14 is connected to one end of the core 13, and the second electrode 15 is connected to the other end of the core 13 to supply electricity to the core 13. At this time, the second electrode 15 has a longer length than the first electrode 14 and is arranged to pass through the inside of the passage member 11.

Meanwhile, with the second electrode 15 disposed, the interior of the passage member 11 may be filled with an inorganic filler having excellent thermal conductivity and insulation, and both ends of the passage member 11 may be sealed with a ceramic adhesive or a silicone adhesive. .

Accordingly, the first electrode 14 and the second electrode 15 are arranged in the same direction with the side leading to the outside. Accordingly, it is possible to apply electricity to both ends of the core 13 from the same direction, and wiring and maintenance are convenient.

The first electrode 14 and the second electrode 15 may be made of a metal wire, and may be connected to the core 13 and other wires using a crimp terminal or shrink tube. With this configuration, the core 13 can conduct electricity along the first electrode 14 and the second electrode 15.

In this way, the first type of heating unit 1 may be configured in such a way that the second electrode 15 passes through the inside of the passage member 11, as shown in FIG. 4A, so that the two electrodes may be arranged on one side. As shown in FIG. 4B, the second electrode 15 may not pass through the inside of the passage member 11 and the two electrodes may be arranged on both sides. Since this heating unit (1) has a simple shape, it can be manufactured at an economical cost.

Meanwhile, the heating unit 1 may further include a cover member 12 that has an external shape and a space therein. A vacuum may be formed inside the cover member 12.

5 is a second form of the heating unit. Referring to the drawing, the cover member 12 is transparent as an elongated glass tube, and the passage member 11, the core 13, and the first electrode 14 are inside the cover member 12. ) and the second electrode 15 are disposed. Additionally, both open ends are closed by two types of finishing members (4).

At this time, the first finishing member 41 in the form of an insulating material such as Styrofoam is inserted into the cover member 12 so that it is located on the inside, and the second finishing member 42 in the form of a sealing material such as silicone is placed on the outside of the first finishing member 41. ) is applied.

When finishing is completed in this way, the passage member 11 with the core 13 wound is placed inside the cover member 12, and the first electrode 14 and the second electrode 15 are placed on the cover member 12. It is possible to form a heating part (1) connected to the outside of.

Meanwhile, the space inside the cover member 12 may be filled with a filler having insulating and conductive properties. The filler may be made of metal powder or inorganic powder with high thermal conductivity.

Meanwhile, the cover member 12 may be a glass tube with one side closed and one side open. In this case, one closed side may be in the shape of a round dome like a light bulb. Additionally, the cover member 12 can be closed by heating the open entrance of the cover member 12 and forming it flat (see FIG. 6). Also, in the case of the second form, two electrodes may be arranged on both sides as in the first form.

In the above description, the heating unit 1 is provided with a passage member 11 and the core 3 is wound around the outer circumference of the passage member 11. However, it can also be configured without the passage member 11. Figure 6 shows a third form of this heating unit 1.

In this case, the heating unit 1 includes a core 13 that is wound like a spring and generates heat by applying electricity, a first electrode 14 connected to one end of the core 13 to supply electricity, and a core. It may be composed of a second electrode 15 that is connected to the other end of (13) and supplies electricity.

In addition, a cover member 12 with a space formed therein is provided so that the core 13 is disposed inside the cover member 12, and the first electrode 14 and the second electrode 15 are formed on the cover member 12. ) can be configured to be connected to both sides.

At this time, the description of the first or second form described above may be applied to the configuration of the core 13, the first electrode 14, the second electrode 15, and the cover member 12 to the extent that they are not arranged. .

Meanwhile, as shown in FIG. 6B, the outer surface of the cover member 12 may be coated with heat dissipating paint 16. Through this, heat can quickly spread from the heating unit (1) to the heat transfer unit (3), thereby raising the temperature in a short time.

The housing portion 2 is configured to surround the heating portion 1 and functions to protect the heating portion 1 while discharging heat generated in the heating portion 1 to the outside.

Referring to the drawing, the housing portion 2 includes a body 21 on which the heating portion 1 is disposed and a heat dissipation member 22 that protrudes from the body 21 to promote heat dissipation.

The body 21 is made in the shape of a tube with an empty center, and the heating unit 1 is disposed therein. The body 21 can be constructed using a metal pipe, and both open ends can be closed with a finishing member 4.

The finishing member 4 may be composed of two types of insulation and sealing materials, and the insulation and sealing materials may be sequentially introduced to finish the body 21. Here, the insulation material and sealing material may correspond to the first finishing member 41 and the second finishing member 42 described above.

One open end of the body 21 may be finished in advance before the heating unit 1 is disposed, and then the other end may be placed with the heating unit 1 inserted into the housing 2. The ends can be finished. Accordingly, complete sealing without heat leakage is possible using a simple method.

The heat dissipation member 22 is arranged to be in contact with the outer periphery of the body 21 and is made of a plurality of plate shapes that protrude at regular intervals. The heat dissipation member 22 may be made of a thin metal such as aluminum or copper.

The heat dissipation member 22 may be attached by pressing a donut-shaped unit member with a hole formed in the center of the circle to the body 21, or a thin strip-shaped aluminum plate or copper plate may be placed on the outer periphery of the body 21. It can also be formed continuously by compressing the contact surface with the body 21 while wrapping it around.

The body 21 and the heat dissipation member 22 forming the exterior of the housing portion 2 may be coated with a heat dissipation paint.

The heat transfer unit (3) is a component interposed between the heating unit (1) and the housing unit (2) and functions to transfer the heat generated in the heating unit (1) to the housing unit (2). It functions to prevent damage due to overheating.

The heat moving part 3 may be made of metal powder or inorganic powder with high thermal conductivity. Here, the inorganic powder with high thermal conductivity may be at least one of glass powder, mica powder, and magnesium oxide powder.

The heat moving part 3 in a powder state can be introduced into the housing part 2 while applying vibration. Accordingly, it is possible to prevent an air layer from forming inside the housing portion 2, prevent moisture from being generated, and improve the degree of sealing compared to using a heat conductive sheet, etc. as a heat transfer part. Such a heat transfer unit (3) increases the lifespan of the heating unit (1) and improves heat dissipation performance.

Next, a carbon fiber heating element according to another embodiment of the present invention will be described in detail with reference to the drawings. Figure 7 is an exploded perspective view of a carbon fiber heating element according to another embodiment of the present invention.

In the following description, the description of the above-described embodiment may be applied to the configuration corresponding to the above-described embodiment to the extent that it is not arranged.

In this embodiment, the housing portion 2 includes a body 21, a nipple 23, and a cap 24. The body 21 is a metal pipe that can be a SUS pipe or a copper pipe, and one end can be closed by welding a circular finish.

The nipple 23 is coupled to one open side of the body 21. The nipple 23 has threads formed on both sides based on the center, and the body 21 is inserted and coupled to the inner peripheral surface of one side of the nipple 23. The body 21 and the nipple 23 can be firmly joined by welding.

According to this combination, the screw of the part connected to the body 21 is exposed to the outside, and this screw is used when installing the carbon fiber heating element 100. Meanwhile, a cap 24 is coupled to the screw on the other side of the nipple 23 to finish it.

A heating unit 1 is installed inside the housing unit 2. In this embodiment, the heating unit 1 has a similar configuration to the heating unit of the second type described above.

Referring to the drawing, the heating unit 1 includes a passage member 11, a cover member 12, a core 13, a first electrode 14, and a second electrode 15, and the first electrode 14 ) and the second electrode 15 extend in the same direction.

One end of the cover member 12 is closed in the shape of a round dome, and the other end is molded flat to have a closed shape. A core 13 wound around a passage member 11 is disposed inside this cover member 12, and a first electrode 14 and a second electrode 15 are connected to each end of the core 13 to form a cover member ( 12) extends to the outside.

A heating part (1) is disposed inside the above-described housing part (2), and a filler with excellent conductivity is filled inside as a heat transfer part (3). After the filler is filled, the open end of the body 21 can be closed using the finishing member 4. The first electrode 14 and the second electrode 15 may extend outward through a hole formed in the cap 24 and be connected to a power source.

This type of carbon fiber heating element has the advantage of being able to be installed simply by fastening the nipple to the hole provided for installation and maintaining a constant installation position.

The carbon fiber heating element 100 as described above can be manufactured as follows. Hereinafter, the description will be based on the manufacturing method of the first type of carbon fiber heating element. The second and third types of carbon fiber heating elements can be manufactured by omitting or adding some of the following processes.

First, a core 13 made of carbon fiber is manufactured. At this time, the core 13 is made up of a plurality of carbon fibers twisted together to meet an appropriate resistance to have an appropriate thickness.

Next, prepare the passage member (11). The passage member may be made of a quartz tube or a ceramic tube, and a metal wire with good current conductivity forming the second electrode 15 is placed inside the passage member. At this time, in the case where the first electrode 14 and the second electrode 15 are arranged on both sides (see FIG. 4B), the metal wire may be omitted. The inside of the passage member 11 may be filled with a filler material so that there is no air, and both open ends may be sealed with an adhesive such as ceramic or silicon.

Next, the core 13 is wound around the passage member 11 in a coil shape and fixed by heat treatment. At this time, the core 13 may be fixed to the passage member 11 with a heat-resistant adhesive and then heat treated.

When heat is applied, the carbon fibers that make up the core 13 are carbonized and each strand is integrated. Additionally, the heat-resistant adhesive is integrated with the carbon fiber, so the carbon fiber has uniform resistance and heat resistance increases. At this time, the heat treatment temperature is preferably set to 1200-1500°C and can be performed in a vacuum or inert gas atmosphere.

Next, the passage member 11 around which the carbonized core 13 is wound is coated by impregnating it with a heat-resistant and insulating ceramic coating agent. Accordingly, the carbon fiber and the passage member are integrated as a whole and have insulation properties.

Next, the heating unit can be completed by combining the first electrode 14 and the second electrode 15 with the combination of carbon fiber and passage member manufactured by the method described above.

Meanwhile, a second type of heating unit can be manufactured by inserting such a heating unit into a cover member. In this case, it can be placed inside the cover member 12 and sealed by vacuuming the inside of the cover member 12, or the inside of the cover member 12 can be filled with a filler having fire resistance and insulation and then sealed.

Next, a housing part (2) into which the heating part (1) is inserted and placed is prepared. Specifically, the body 21 of the housing part 2 is manufactured by cutting a metal pipe with a diameter into which the heating part 1 can be inserted. Subsequently, the housing portion 2 can be manufactured by forming a heat dissipation member 22 on the outside of the body 21. One of the open sides of the body 21 formed of a metal pipe may be pre-finished by a finishing member 4.

In the above description, the process of manufacturing the heating unit and the process of manufacturing the housing unit may be performed in reverse order or simultaneously.

Next, the heating part 1 is inserted into the housing part 2 and then the internal space of the housing part 2 is filled with metal powder or inorganic powder. Metal powder or inorganic powder forms the heat transfer portion (3).

Next, the carbon fiber heating element 100 can be manufactured by closing the open portion of the body 21 with the finishing member 4.

As described above, the carbon fiber heating element is not limited to the configuration and method of the embodiments described above, and the embodiments may be configured by selectively combining all or part of each embodiment so that various modifications can be made. there is.

Although the detailed description of the present invention described above has been described with reference to preferred embodiments of the present invention, those skilled in the art or those skilled in the art will understand the spirit of the present invention as described in the patent claims to be described later. It will be understood that the present invention can be modified and changed in various ways without departing from the technical scope.

1: Heating part
11: Passage member 12: Cover member 13: Core 14: First electrode
15: second electrode 16: heat dissipation paint
2: Housing portion 21: Body 22: Heat dissipation member 23: Nipple 24: Cap
3: Heat transfer part
4: Finishing member 41: First finishing member 42: Second finishing member
100: carbon fiber heating element

Claims (9)

A heating unit comprising a core made of carbon fiber, electrodes connected to both ends of the core, and generating heat in the core as electricity is applied to the electrode;
A housing portion having a space formed inside and an open entrance so that the heating portion can be inserted, and the heating portion being disposed therein;
A finishing member that closes the open entrance of the housing portion, and
In a state where the heating unit is disposed in the housing unit, a heat transfer unit is filled in the space inside the housing unit, has insulation and conductivity, and transfers heat generated from the heating unit to the housing unit,
The core is made by coating a plurality of carbon fiber bundles with a heat-resistant material and carbonizing them in a twisted state,
The housing part is made of a body in the form of a metal pipe open at both ends, and the finishing member is made of an insulating material and a sealing material, and the insulating material and the sealing material are sequentially brought into contact to fill the inside of the body to close the housing portion,
The heating unit includes a passage member in the shape of a tube with an empty center, a core that wraps around the outside of the passage member and generates heat by applying electricity, and a first electrode connected to one end of the core to supply electricity. and a second electrode disposed to pass through the interior of the passage member and connected to the other end of the core to supply electricity, wherein the interior of the passage member is filled with an inorganic filler.
Carbon fiber heating element. According to paragraph 1,
The heating unit,
It further includes a cover member that forms an external shape and forms a space inside,
The passage member in which the core is wound is disposed inside the cover member, and the first electrode and the second electrode are connected to the outside of the cover member,
A carbon fiber heating element in which the space inside the cover member is filled with an inorganic filler that has insulating and conductive properties and moves heat generated in the core. According to paragraph 2,
A carbon fiber heating element coated with a heat dissipating paint on the outer surface of the cover member. According to paragraph 1,
The housing part,
A body made of a tubular shape with an empty center inside which the heating unit is disposed, and
A heat dissipation member made of a plurality of plate shapes disposed in contact with the outer periphery of the body and protruding at regular intervals.
A carbon fiber heating element comprising a. According to paragraph 1,
The heat transfer unit is a carbon fiber heating element made of inorganic powder. delete delete delete delete

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