KR102583772B1 - Carbon Nanobase Heating System - Google Patents

Abstract

The present invention relates to a carbon nano-based heating system, and more specifically, a planar heating element for heating air is installed in a spiral-shaped state in the main body of a heater on which a blowing fan is installed, and the temperature of the planar heating element on the side closest to the blowing fan is provided. It is about a carbon nano-based heating system that produces high output in a small area by lowering the temperature on the side far from the blower fan.

Description

Carbon Nanobase Heating System

The present invention relates to a carbon nano-based heating system, and more specifically, a planar heating element for heating air is installed in a spiral-shaped state in the main body of a heater on which a blowing fan is installed, and the temperature of the planar heating element on the side closest to the blowing fan is provided. It is about a carbon nano-based heating system that produces high output in a small area by lowering the temperature on the side far from the blower fan.

In large spaces such as greenhouses for growing crops or camping sites, heaters are installed to quickly heat the surrounding area.

Among the heaters, a heater using a heating wire is composed of a heating wire that generates high-temperature heat by an applied power source, and a blowing fan that blows air into the heating wire and blows the heated air around the heating wire to the heating area.

These heating wire heaters have the advantage of having a very fast temperature increase rate, but have the disadvantage of having very low thermal efficiency and consuming a lot of energy. In addition, the heating wire heater has the problem of generating gas harmful to the human body when the metal heating wire is heated to a high temperature.

Meanwhile, as another example of a heater, a heater using a positive temperature coefficient heater includes a PTC heater that generates high temperature heat by an applied current, and a blowing fan that blows air into the PTC heater and blows the heated air around the PTC heater to the heating area. It consists of

This PTC heater-type hot air blower can be controlled to a constant temperature by controlling the current flow of the PTC heater, so the blowing temperature can be adjusted, but the temperature increase speed is very slow, making it unsuitable for use in places where rapid heating is required.

As another example, a heater using a heat pipe consists of a heat pipe that generates high-temperature heat by vaporizing the heat medium, and a blowing fan that blows air into the heat pipe and blows the heated air around the heat pipe to the heating area. .

Since these heat pipe-type heaters use a heat medium, they have the disadvantage of consuming a lot of energy and being unsuitable for supplying a large amount of warm air.

To solve this problem, a hot air heater using a planar heating element with high thermal efficiency is composed of a planar heating element that heats the air and a blowing fan that blows air into the planar heating element and blows the heated air around the planar heating element to the heating area, so it can be used in large spaces. It has the advantage of being able to heat quickly, not generating harmful substances harmful to the human body during operation, and reducing energy loss as much as possible.

However, a conventional hot air heater using a planar heating element heats the air quickly and has problems such as damaging the planar heating element or causing a fire due to high-temperature heat accumulating inside.

KR 10-1656182 (registration number) 2016.09.02. KR 10-1886231 (registration number) 2018.08.01. KR 10-2023-0027768 (Publication number) 2023.02.28.

The present invention is intended to solve the above problems,

In the main body of a heater with a blower fan installed at the rear, a planar heating element that heats the air is installed in a spiral-shaped state at the front, and the temperature on the side of the planar heating element closer to the blower fan is high and the temperature on the side farthest from the blower fan is low. The purpose is to provide a carbon nano-based heating system that produces high output in a small area.

Another object of the present invention is to arrange the planar heating element by rolling it into a spiral shape, inserting a gap adjuster between the faces of the planar heating element, and inserting a fixture to form an empty space in the center of the planar heating element. The aim is to provide a carbon nano-based heating system that maintains the temperature stably and prevents damage to the planar heating element by preventing internal heat from accumulating.

Another object of the present invention is to provide a carbon nano-based heating system that protects the insulation of the planar heating element by cutting the carbon band at the area where the power supply terminal is attached to prevent heat generation.

Another object of the present invention is to stably maintain the internal temperature so that the air temperature is the same at both ends of the planar heating element, thereby preventing damage to the planar heating element, increasing energy efficiency, and controlling the speed of the blowing fan to prevent damage to the planar heating element. The goal is to provide a carbon nano-based heating system that maintains temperature and adjusts the temperature as needed.

Another object of the present invention is to provide a detachable, openable and closed air heater body to facilitate assembly and maintenance, and to solve problems such as high temperature safety and grounding.

To achieve the above object, the present invention provides the following means.

The present invention includes a hot air blower body (110) with open front and rear sides; A carbon band 121, which is a heating film, is printed on the base film, copper foil 122 is mounted on the front and rear ends of the carbon band 121, and wrapped with an insulating film 123, power is supplied, and the heater main body 110 A planar heating element 120 installed in a spirally rolled state on the main body front part 111 of; A spacing adjuster 130 disposed between the surfaces of the planar heating element 120 to form an empty space; A cylindrical fixture 140 inserted into the center of the planar heating element 120 to form an empty space; A blowing fan 150 that removes air from the rear portion 112 of the heater main body 110 to the planar heating element 120 and supplies heated air to the front of the heater main body 110; It includes a control unit 180 that controls the speed of the blowing fan 150 according to the temperature of the planar heating element 120; The planar heating element 120 provides a carbon nano-based heating system in which the side closer to the blower fan 150 has a higher temperature than the side farther away.

The hot air blower main body 110 includes a main body front part 111 where the planar heating element 120 is disposed, a main body rear part 112 where the blowing fan 150 is disposed, and a front end of the main body front part 111. A safety net 113 and a cross-shaped fixing bar 114 are installed, respectively.

The planar heating element 120 has a diameter smaller than the diameter of the heater main body 110 in a spirally rolled state, and the fixture 140 is inserted into the center of the planar heating element 120 inserted into the heater main body 110. The diameter is smaller than the diameter of the planar heating element 120.

A wind pressure sensor 160 that detects air flow at the front of the blowing fan 150; And a temperature sensor that detects the temperature of the planar heating element 120; It further includes.

The heater main body 110 is cut vertically or horizontally at the center, and is provided with a hinge 115 on one side where the horizontally cut upper body 110a and the lower body 110b are joined, and a clamp 116 on the other side. ) is used to open and close it in a detachable manner.

The heating film is a carbon band 121 formed by printing a plurality of strips of conductive carbon ink on a base film. The conductive carbon ink consists of 20 to 60 parts by weight of resin, 5 to 15 parts by weight of carbon, and graphite per 100 parts by weight of solvent. It contains 10 to 20 parts by weight and 0.01 to 1 part by weight of carbon nanotubes (CNTs), and the solvent is butyl cellosove, butyl cellosolve acetate and ethyldiglycol acrylate. Any one selected from the group consisting of is used, and the resin is a group consisting of epoxy resin, phenol resin, polyethylene terephthalate resin (PET resin), PE resin, polyurethane resin (PU resin), and nitrocellulose resin (NC resin). Use one or more selected from.

When printing the carbon strip 121, the left and right density differences are printed with a difference of 20 to 95%.

When forming a plurality of carbon bands 121 by printing conductive carbon ink on the base film, the width of the carbon bands 121 is 5 to 30 mm, and the distance between the carbon bands 121 and the adjacent carbon bands 121 is 1. It is ~30mm.

A planar heating element is formed by printing silver ink overlapping on the carbon band 121 formed by printing conductive carbon ink on the base film, and the width when printing the silver ink is 1 to 20 mm.

The carbon strip 121 is cut at a ratio of 1:1 for up to 1 m, 1:2 for 1 to 2 m, and 1:3 for 2 to 3 m.

Therefore, the carbon nano-based heating system of the present invention is installed in a spirally rounded state with a planar heating element for heating air at the front of a heater main body with a blowing fan installed at the rear, and the temperature of the planar heating element on the side closest to the blowing fan is It has the effect of producing high output in a small area by lowering the temperature on the side far from the blowing fan.

The present invention is arranged by rolling the planar heating element in a spiral shape, inserting a gap adjuster between the faces of the planar heating element, and inserting a fixture to form an empty space in the center of the planar heating element to adjust the temperature of the planar heating element. It has the effect of maintaining stability and preventing damage to the planar heating element by preventing internal heat from accumulating.

The present invention has the effect of protecting the insulation of the planar heating element by cutting the carbon band at the area where the power supply terminal is attached to the planar heating element to prevent heat generation.

The present invention not only prevents damage to the planar heating element by stably maintaining the internal temperature so that the air temperature is the same at both ends of the planar heating element, but also increases energy efficiency, and maintains the temperature of the emitted air by controlling the speed of the blowing fan. , which has the effect of controlling the temperature as needed.

The present invention has the advantage of preventing fires in the system in advance and providing prompt after-sales service by attaching a sensor that detects fine sparks generated from the planar heating element.

The present invention also has the advantage of easy assembly and maintenance by providing the hot air blower body in a detachable manner that can be opened and closed.

The present invention has the effect of improving output by printing carbon strips by varying the left and right density differences when printing.

The present invention has the effect of controlling resistance by printing silver ink on conductive carbon ink and laminating it with copper foil.

The present invention has the advantage of equalizing the internal temperature with the external temperature by cutting the conductive carbon ink carbon strip printed on the base film.

The present invention has the advantage that a lot of left infrared rays are emitted from the heating film.

1 is a perspective view of a carbon nano-based heating system according to an embodiment of the present invention;
Figure 2 is an exploded perspective view of a carbon nano-based heating system according to an embodiment of the present invention;
Figure 3 is a perspective view of the planar heating element, the gap adjuster, and the fixture in a spiral-shaped state in the carbon nano-based heating system according to an embodiment of the present invention;
Figure 4 is a cross-sectional view of a carbon nano-based heating system according to an embodiment of the present invention;
Figure 5 is a plan view of the planar heating element in the carbon nano-based heating system of the present invention,
Figure 6 is a front view of the hot air blower body separated vertically in a carbon nano-based heating system according to another embodiment of the present invention;
Figure 7 is a side view of a carbon nanobase heating system according to another embodiment of the present invention.
Figure 8 shows the emissivity and radiant energy test report of the carbon nanobased heating system of the present invention.

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

The present invention is a carbon nano-based heating system 100 for quickly heating a large space, as shown in FIGS. 1 to 7,

A hot air blower body (110) with open front and rear sides,

A carbon band 121, which is a heating film, is printed on the base film, copper foil 122 is mounted on the front and rear ends of the carbon band 121, and wrapped with an insulating film 123, power is supplied, and the heater main body 110 A planar heating element 120 installed in a spirally rolled state on the main body front part 111 of;

A spacing adjuster 130 that is disposed between the surfaces of the planar heating elements 120 and forms an empty space by spacing the planar heating elements 120 spirally rolled in a zigzag-shaped uneven shape,

A cylindrical fixture 140 inserted into the center of the planar heating element 120 to form an empty space,

A blower fan 150 that pushes air from the rear portion 112 of the heater main body 110 to the planar heating element 120 and supplies heated air to the front of the heater main body 110,

A wind pressure sensor 160 that detects air flow at the front of the blowing fan 150,

A temperature sensor (not shown) that detects the temperature of the planar heating element 120,

It includes a control unit 180 that controls the speed of the blowing fan 150 according to the temperature of the planar heating element 120.

The output on the side close to the blowing fan 150, where cold wind is generated from the planar heating element 120, is high, so the temperature is high, and the output on the side far from the blowing fan 150 is low, so the temperature is lowered and the front and rear of the planar heating element 120 In this stage, the temperature difference between the front and back of the planar heating element 120 is kept small. The rear of the planar heating element 120 must be raised to a high temperature by being close to the blowing fan 150, and the front of the planar heating element 120 is far from the blowing fan 150. Even if the temperature is maintained at a low temperature, the close distance By mixing with the high temperature air that has been moved from, the temperature difference across the entire surface of the planar heating element 120 is minimized. In this way, by providing a temperature difference of the planar heating element 120 itself in order to maintain a uniform temperature of the air moving throughout the planar heating element 120, a high heating effect can be provided even with low power consumption.

As shown in FIG. 4, the heater main body 110 is divided into two spaces: a main body front part 111 through which warm air is discharged to the outside, and a main body rear part 112 through which cooling air is sent from the blowing fan 150. It can be, the planar heating element 120 is inserted into the main body front part 111 in a spirally rolled state, and a gap adjuster 130 is inserted between the surfaces of the planar heating element 120, A fixture 140 is inserted into the center of the planar heating element 120.

In the present invention, the planar heating element 120 is formed as one long plane, and a carbon band 121 is formed on it, the temperature is raised by supplying electricity, and it has a spiral-shaped shape. In this way, the planar heating element 120, which is formed in a spiral shape, is required to have a gap adjuster 130 that forms an empty space to prevent the inner and outer surfaces from contacting because an electrical hazard may occur when the continuous inner and outer surfaces are in contact. The spacing adjuster 130 is spirally rolled in the same manner as the spirally rolled planar heating element 120 to space the inner and outer surfaces of the continuously arranged planar heating elements.

In addition, a blowing fan 150 and a wind pressure sensor 160 are installed in the rear part of the main body 112, and the front end of the main body 111, the rear end, and the rear end of the rear part 112 of the main body (blowing fan) On the side (closer to 150), a safety net 113 and a fixing bar 114 are installed.

As shown in Figure 2, the hot air blower main body 110 is made of a cylindrical shape with the front and back open, and the main body front part 111 where the planar heating element 120 is disposed, and the blowing fan 150 are disposed. A safety net 113 and a cross-shaped fixing bar 114 are installed on the rear portion of the main body 112 and the front end of the front portion 111, respectively.

The fixing bar 114 is fixed with a bolt inserted into a coupling hole formed in the heater main body 110 and a nut coupled to the bolt, and the safety net 113 is fastened or fixed to the heater main body 110 with bolts and nuts. It can be fixed to the bar 114 with a clip or the like.

In the present invention, the main body front part 111 is a part where the front end of the planar heating element 120 is disposed and the warm air heated by the planar heating element 120 is discharged, and the main body rear part 112 is a part where air is discharged to the planar heating element 120. This is the part where the pushing blower fan (150) is fixedly installed.

The planar heating element 120 has a carbon band 121, which is a heating film, printed on a base film, and copper foil 122 is mounted on the front and rear ends of the carbon band 121, and in order to prevent electric leakage, a non-conducting material such as PET or PI is installed. It is wrapped and insulated with an insulating film 123. The planar heating element 120 prints a plurality of strips of highly conductive carbon ink that improves conductivity on the PET film, which becomes the base film, to form a carbon strip 121, and prints silver horizontally on the carbon strip 121 to form a carbon strip. Insert copper foil (122) vertically into (121).

The planar heating element 120 is manufactured and printed with a difference of 20 to 95% in the left and right density of the carbon band 121 at the front and rear ends, so as to maximize output and thermal efficiency.

The planar heating element 120 continuously prints carbon bands 121 on a base film (PET film), prints the carbon bands 121 and silver ink so that they overlap, and prints the carbon bands 121 and copper foil 122. ) is laminated by adjusting the spacing so that it does not overlap to facilitate the flow of electricity and prevent fires from occurring due to sparks due to poor electricity flow.

Since the planar heating element 120 generates high heat internally in a state in which it is wound spirally from the center to the outside, the internal temperature is lowered to prevent a temperature difference due to poor internal and external air flow when rolled in a spiral shape. In order to increase output, the carbon strip (121) is cut at a ratio of 1:1 for up to 1 m, 1:2 for 1 to 2 m, and 1:3 for 2 to 3 m, thereby lowering the output and making the internal temperature uniform with the external temperature.

The planar heating element 120 connects the power supply terminal 124 to a high output area, insulates it, and then cuts the carbon band 121 to which the power supply terminal 124 is connected to connect the power supply terminal 124 and the area by heat. Make sure that the insulation is not damaged due to damage.

The planar heating element 120 is arranged so that the power supply terminal 124 does not pass through the planar heating element 120 in order to prevent thermal deformation of the power supply terminal 124, and is divided into three parts to maximize the output to determine the printing thickness of the ink. Cut the copper foil (122) in the low area to about 1 to 10 mm to block the flow of electricity, and then insulate the power supply terminal (124) and the cut area to prevent electric leakage. The planar heating element 120 is dangerous when the front and rear ends are exposed to the fixture 140 or the fixing bar 114, so cut the copper foil 122 into 1 to 3 carbon bands 121 at both ends to make 1 to 3 pieces. Electricity does not flow in the carbon band 121 to prevent heat generation, so that the end where electricity flows is not exposed. Accordingly, electricity does not flow to the first fixing bar (114a) and the second fixing bar (114b) disposed at the front and rear ends of the planar heating element 120.

In this way, the planar heating element 120 prevents heat generation by cutting the carbon band 121 from the center at a ratio of 1:1 to 1:2 and 1:3 in order to lower the output generated at the center. At this time, the carbon strip 121 is cut 1:1 up to 1 m, 1:2 up to 1 to 2 m, and 1:3 up to 2 to 3 m, and does not cut longer than 3 m.

The planar heating element 120 has the high output side toward the main body rear portion 112 and the low output side toward the main body front portion 111, and a temperature sensor (not shown) for detecting temperature is installed at the front and rear ends. They are installed approximately 20 to 40 mm from the copper foil 122 (the area where the maximum output is generated) to prevent damage due to temperature when the blower fan 150 breaks down or does not operate. It is equipped with a thermocouple type sensor with a time of less than 5 seconds. Generally, the resistance-type temperature sensor used has a slow time to reach the set temperature, causing thermal damage to the film. Therefore, in the present invention, the temperature sensor is made by tying two wires made of different metals together at both ends and applying heat to one wire. It consists of a thermocouple-type temperature sensor that generates a current that continuously flows in the circuit.

The planar heating element 120 is installed with a thermocouple-type temperature sensor in order to accurately determine the heating state, and sensors that control the temperature of the planar heating element 120 are placed at the front and rear ends, respectively, to ensure safety.

The planar heating element 120 of the present invention is insulated with an insulating film 123 such as PET or PI with high temperature durability to prevent electric leakage to ensure the safety of workers.

On the other hand, the planar heating element 120 may be formed as a single planar heating element, or may be composed of a plurality of separate planar heating elements. That is, as shown in Figure 5, it is composed of a first surface heating element (120a), a second surface heating element (120b), and a third surface heating element (120c) that are provided independently of each other, and can be operated in three stages. The first surface heating element, the second surface heating element, and the third surface heating element, which are provided independently of each other, are sequentially arranged on the spacing regulator 130 and then rolled together with the spacing regulator 130, and then the hot air heater main body 110. Assembly can be completed by inserting and mounting it inside.

The planar heating element 120 includes a copper foil 122 connected to the electric supply terminal 124 coated on the edge of the base film, a carbon band 121 coated in a strip shape between the copper foil 122, and surrounding them. It is composed of an insulating film 123.

The temperatures of the first surface heating element (120a), the second surface heating element (120b), and the third surface heating element (120c) are sensed by temperature sensors, and the control unit 180 controls ON/OFF according to each sensing temperature. can do.

On the other hand, the planar heating element 120 protrudes in a zigzag shape between the surfaces, inserts a spacing adjuster 130 to maintain an empty space by spacing the surfaces apart, and has a cylindrical fixture 140 in the center. ) is inserted to secure a certain internal space, preventing damage to the planar heating element 120 by preventing heat from accumulating inside, and preventing safety accidents due to high temperature by preventing excessive temperature rise in the center.

The spacing adjuster 130 is provided with protruding irregularities in a zigzag shape with a height of about 5 to 30 mm and is spirally rolled like a cochlea together with the planar heating element 120, and the planar heating element 120 has a diameter of 100. It can be provided in a size of ~600mm, and is provided smaller than the diameter of the hot air blower main body 110 in order to be inserted into the hot air blower main body 110.

At this time, the fixture 140 inserted into the center of the planar heating element 120 is preferably made of a cylinder of at least 10 cm in diameter smaller than the spirally rolled planar heating element 120. The fixture 140 is open at both ends and is provided as a space for air to move from the rear end to the front end. If there is no empty space inside the planar heating element 120, the heat continues to increase and heat accumulates inside, which may damage the planar heating element 120. Therefore, in order to secure a certain internal space, the space adjuster 130 and the fixture ( 140) is provided.

The planar heating element 120, the spacing adjuster 130, and the fixture 140 are composed of heating parts inserted into the hollow air heater main body 110.

The planar heating element 120 is rolled up and then inserted into the fixture 140 to allow the flow of air flowing inside to flow only in the film direction, so that the planar heating element (120) arrives first when cold wind blows from the blowing fan 150. The temperature at the rear end of 120) may be different from the temperature at the front end where the heated warm air passes through the planar heating element 120, but the present invention is a blowing fan ( 150), increase the output on the side close to it, and lower the output on the side far from the blowing fan 150, which generates warm wind by the air heated by the planar heating element 120, at the front and rear ends of the planar heating element 120. Ensure that the same or similar temperature is maintained.

Since the output of the planar heating element 120 must be different so that there is no temperature difference at the front and rear ends, the output at the rear end of the planar heating element 120, where cold wind arrives from the blower fan 150 and is cooled, is about 30% higher than the front end, causing a high temperature. In addition, the output at the front end of the planar heating element 120 is lower than the rear end, resulting in low temperature, making it possible to produce high output with a small area.

In addition, the present invention allows the control unit 180 to control the temperature of the planar heating element 120 by controlling the speed of the blowing fan 150 according to the temperature of the planar heating element 120.

The blowing fan 150 has a blade diameter of 150 mm to 450 mm and is equipped with a speed controller 151 that can adjust the rotation speed from 30 to 100%. The blades of the blowing fan 150 are located inside the heater main body 110. The spacing between passages is 10 mm or less.

The diameter of the blower fan 150 is set according to the inner diameter of the hot air main body 110, and the gap between the inner surface of the hot air blower main body 110 and the blades is 10 mm or less to maintain air volume and wind pressure, so that the hot air blower main body 110 ) Even if piping is connected to the front end, heat in the planar heating element 120 is not accumulated.

In this way, the blowing fan 150 can control the temperature of the planar heating element 120 by adjusting the blowing amount by controlling the rotational speed of the motor 152 by supplying electricity through the speed controller 151. In this way, the blowing fan 150 is equipped with a speed controller 151 to change the temperature of the planar heating element 120 below the set temperature and stops operation above the critical value.

In addition, the present invention protects equipment by detecting light generated from sparks before a fire occurs when a problem occurs in a heating element or equipment.

In addition, the heater main body 110 of the present invention is mounted on a base frame 190 to be supported from the floor, and the base frame 190 can be equipped with wheels to facilitate movement while lowering the height depending on the intended use. there is.

Meanwhile, a wind pressure sensor 160 that detects air flow is installed at the front end of the blowing fan 150 at the rear part 112 of the heater main body 110, and the planar heating element ( A control unit 180 is installed to control the speed of the blowing fan 150 according to the temperature of the fan 120. As shown in FIG. 4, the control unit 180 is provided as a motor control panel (MCC) and is attached to the top or side of the hot air blower main body 110.

The control unit 180 operates according to the wind pressure sensor 160 or the temperature sensor, and the control panel includes a speed regulator 151 for controlling the speed of the blowing fan 150, a power source for the blowing fan 150, and a wind pressure sensor 160. and a power supply for the temperature sensor, an internal power connection, and an external power connection. The temperature sensor allows the user to move as needed, and is used for controlling the indoor temperature, controlling the temperature of the planar heating element 120, and controlling the emitted temperature.

The present invention is assembled in a bullet terminal type that can be easily assembled while blocking earth leakage in a one-touch type for power or sensor connection, and the control unit 180 is equipped with a flame detection sensor and control device that can check the status of the planar heating element 120. It is installed.

And the control unit 180 includes a communication port to receive external control.

On the other hand, the heater main body 110 has a planar heating element 120 inserted therein as shown, a blower fan 150 and a wind pressure sensor 160 are installed, and a fixing bar 114 and a safety net 113 are installed. Since it is fixedly installed at the front and rear ends of the main body front part 111 and the main body rear part 112, maintenance is difficult in case of failure of the internal device, so it is provided to be opened and closed by cutting the center vertically and horizontally as shown in Figure 7. . At this time, when the heater main body 110 is cut vertically, it can be separated into a main body front part 111 and a main body rear part 112, and when cut horizontally, it is separated into a main body upper part 110a and a main body lower part 110b on one side. This hinge 115 is coupled, and the opposite side is detachably opened and closed using a clamp 116.

In this way, the hot air blower main body 110 is divided into an upper main body 110a and a lower main body 110b, and one side is coupled with a hinge 115, and the other side is bolted or provided with a clamp 116, making disassembly and assembly easy and repair. is easily provided.

Next, the planar heating element 120 of the present invention will be described in detail.

The heating film is a carbon band 121 formed by printing a plurality of bands of conductive carbon ink on a base film.

There is an advantage that a lot of far-infrared rays are emitted from the heating film.

The conductive carbon ink contains 20 to 60 parts by weight of resin, 5 to 15 parts by weight of carbon, 10 to 20 parts by weight of graphite, and 0.01 to 1 part by weight of carbon nanotubes (CNTs) per 100 parts by weight of solvent.

The solvent may be any one selected from the group consisting of butyl cellosove, butyl cellosolve acetate, and ethyldiglycol acrylate.

If less than 20 parts by weight of the resin is included in 100 parts by weight of the solvent, there is a problem of insufficient adhesion, and if it is included in more than 60 parts by weight, there is a problem in controlling resistance.

The resin is preferably selected from the group consisting of epoxy resin, phenol resin, polyethylene terephthalate resin (PET resin), PE resin, polyurethane resin (PU resin), and nitrocellulose resin (NC resin). .

If less than 5 parts by weight of carbon is included in 100 parts by weight of the solvent, the resistance is high and there are problems with resistance control, and if it is included in more than 15 parts by weight, there are problems with resistance control and branching.

If less than 10 parts by weight of graphite is included in 100 parts by weight of the solvent, there is a problem with resistance control, and if it is included in more than 20 parts by weight, there is a problem of poor adhesion due to poor dispersion ability.

If less than 0.01 parts by weight of carbon nanotubes (CNTs) are included in 100 parts by weight of the solvent, there is a problem in controlling resistance, and if it is included in more than 1 part by weight, there is a problem in controlling viscosity.

The present invention is characterized by printing the carbon strip 121 with the left and right density differences of 20 to 95%.

The reason why the carbon strip 121 is printed so that there is a difference in density between the left and right sides during the above printing is to maximize output and thermal efficiency.

If the carbon strip 121 is printed with the left and right density differences of less than 20%, there is a problem in that the temperature difference in cooling is low and the air volume cannot be increased by increasing the blower speed. If the carbon strip 121 is printed with a difference of more than 95%, the air volume can be increased by increasing the blower speed. Even if it is raised, there is a problem with cooling.

This means that the concentrated salt tea is safe and can produce optimal output.

The planar heating element 120 preferably uses polyethylene terephthalate resin (PET resin) as a base film and has a width of 10 to 500 mm.

When forming a plurality of carbon bands 121 by printing conductive carbon ink on the base film, the width of the carbon bands 121 is preferably 5 to 30 mm, and the gap between the carbon bands 121 and the adjacent carbon bands 121 is It is preferably 1 to 30 mm.

If the width of the single carbon band (121) is less than 5 mm, there is a problem with output control, and if it is more than 30 mm, there is a problem of damage to the film due to damage to the heating band or large portions of the film being heated in the event of an abnormality.

If the gap between the carbon strip 121 and the adjacent carbon strip 121 is less than 1 mm, there is a problem with adhesion during laminating, and if it is more than 30 mm, there is a problem due to a reduction in the heating area.

When forming a plurality of carbon bands (121) by printing conductive carbon ink on the base film, the chamber temperature is maintained at 150°C, 160°C, and 150°C, respectively, and the content of ink per carbon band (121) is changed to 0.1KΩ. Print at ~50KΩ.

In the present invention, it is preferable to form the planar heating element 120 by printing silver ink overlapping on the carbon band 121 formed by printing conductive carbon ink on the base film.

When printing the silver ink, the width is preferably 1 to 20 mm.

When printing with the silver ink, if the width is less than 1 mm, there is a limit to the electrical flow between the copper foil 122 and the carbon strip 121, causing a breakage problem. If it exceeds 20 mm, the electrical flow is smooth, but the silver usage is large, so it is not economical. There is a problem.

The silver powder used in the silver ink may be flake silver or nano silver.

The planar heating element can be manufactured as a conductive planar heating element by printing silver so that it overlaps the carbon strip by 1 to 5 mm after printing with conductive carbon ink, placing copper foil so that it does not overlap the carbon strip, and laminating it with PET film.

During laminating, there are three rollers: a heating roller that melts the adhesive resin at the top, a heating roller made of silicone resin in the middle, and finally a basic heating roller at the bottom. The temperature of the top roller is set at 70~180℃, and the heating roller made of silicone resin. The temperature of the roller is 50 to 100℃, and the basic heating roller at the bottom is 50 to 130℃. After laminating by applying pressure to the silicone resin roller, cut the copper foil to check the degree of adhesion and use a safely bonded film.

Silver can be printed in various patterns. The stronger the copper foil is fixed, the more empty space there should be in the silver pattern between the carbon and the copper foil. However, printing is done so that there are no areas on the end of the carbon where silver is not applied.

Therefore, the carbon nano-based heating system of the present invention is installed in a spirally rounded state with a planar heating element for heating air at the front of a heater main body with a blowing fan installed at the rear, and the temperature of the planar heating element on the side closest to the blowing fan is It has the effect of producing high output in a small area by lowering the temperature on the side far from the blowing fan.

The present invention is arranged by rolling the planar heating element in a spiral shape, inserting a gap adjuster between the faces of the planar heating element, and inserting a fixture to form an empty space in the center of the planar heating element to adjust the temperature of the planar heating element. It has the effect of maintaining stability and preventing damage to the planar heating element by preventing internal heat from accumulating.

The present invention has the effect of protecting the insulation of the planar heating element by cutting the carbon band at the area where the power supply terminal is attached to the planar heating element to prevent heat generation.

The present invention not only prevents damage to the planar heating element by stably maintaining the internal temperature so that the air temperature is the same at both ends of the planar heating element, but also increases energy efficiency, and maintains the temperature of the emitted air by controlling the speed of the blowing fan. , which has the effect of controlling the temperature as needed.

The present invention has the advantage of preventing fires in the system in advance and providing prompt after-sales service by attaching a sensor that detects fine sparks generated from the planar heating element.

The present invention also has the advantage of easy assembly and maintenance by providing the hot air blower body in a detachable manner that can be opened and closed.

The present invention has the effect of improving output by printing carbon strips by varying the left and right density difference when printing.

The present invention has the effect of controlling resistance by printing silver ink on conductive carbon ink and laminating it with copper foil.

The present invention has the advantage of equalizing the internal temperature with the external temperature by cutting the conductive carbon ink carbon strip printed on the base film.

The present invention has the advantage that a lot of left infrared rays are emitted from the heating film.

Hereinafter, the configuration and effects of the present invention will be described in more detail through examples. These examples are only for illustrating the present invention and the scope of the present invention is not limited by these examples.

Conductive carbon ink was prepared by mixing 25 parts by weight of epoxy resin, 5 parts by weight of PET resin, 10 parts by weight of carbon, 15 parts by weight of graphite, and 0.05 parts by weight of carbon nanotubes (CNT) with 100 parts by weight of butyl cellusolve acetate.

[Experimental Example 1]

When printing the carbon strip 121 using the conductive carbon ink prepared in Example 1, the left and right density differences were printed with different density differences, and the maximum output and emission temperature of the heating element were measured and shown in Table 1.

Density deviation (%) Output (300㎜/m)W Release temperature (℃) 0 500 38 20 650 45 40 800 53 60 1050 65

According to Table 1, it can be seen that when printing the carbon strip 121, when printing with different left and right dark dye differences, the output is improved compared to the case where there is no left and right dark dye difference.

[Experimental Example 2]

When printing the carbon strip 121 using the conductive carbon ink prepared in Example 1, the left and right density differences were varied, and the surface temperature of the planar heating element was measured and shown in Table 2.

Density deviation (%) Surface temperature (℃) note 100 43
AC 70V
90 50 80 59 70 67

It is good to have an appropriate left and right deviation in surface temperature so that the blower can cool down sufficiently.

[Experimental Example 3]

In the case of forming a planar heating element by printing the conductive carbon ink prepared in Example 1 on a 300 mm wide PET base film with a carbon strip width of 20 mm and a gap between the carbon strip and adjacent carbon strips of 2 mm, When silver ink was printed to a width of 7 mm on conductive carbon ink printed on a PET base film and laminated with copper foil with a thickness of 0.05 mm and a width of 15 mm, the resistance was measured and is shown in Table 3.

division resistance Conductive carbon ink 1.0~10.0kΩ Conductive carbon ink+
Silver ink+
Copper foil laminating 30~500Ω

According to Table 3, it can be seen that the resistance value is higher when silver ink is printed on conductive carbon ink and laminated with copper foil compared to when only conductive carbon ink is printed.

[Experimental Example 4]

The output was measured when the conductive carbon ink carbon strip printed on the base film was cut and when it was not cut, and is shown in Table 4.

strip cutting Print Safe outlet temperature (℃) 0 13.0 42 1:1 12.2 48 1:2 11.8 55 1:3 11.0 50

It has the advantage of equalizing the internal temperature with the external temperature by cutting the carbon strip printed on the base film using conductive carbon ink.

[Experimental Example 5]

The resistance was measured by varying the width of the carbon strip printed on the base film using conductive carbon ink, and is shown in Table 5.

Heating film width (㎜) 300 300 300 Carbon belt width (mm) 10 15 20 1m length resistance (Ω) 40 45 37

It can be seen that the resistance value is appropriate when the width of the carbon band 121 is 10 to 20 mm.

[Experimental Example 6]

A carbon band, which is a heating film, was printed on the base film using the conductive carbon ink prepared in Example 1, and copper foil was installed on the front and rear ends of the carbon band, wrapped with an insulating film, and spirally rounded on the front of the heater main body. A carbon nano-based heating system including a planar heating element installed in a dried state was manufactured.

The carbon nano-based heating system was commissioned by the Korea Far-Infrared Association to test its emissivity and radiant energy, and the results are shown in Table 6 and Figure 8.

emissivity
(5~20㎛) radiant energy
(W/m ² ·㎛, 80℃) Test Methods carbon nano base
heating system 0.893 6.08×10 ² KFIA-FI-1005

According to Table 6 and Figure 8, it can be confirmed that the carbon nanobase heating system of the present invention emits a large amount of far-infrared rays.

100: Carbon nano-based heating system
110: Heater main body 110a: Main body upper part
110b: lower body 111: front part of main body
112: rear part of main body 113: safety net
113a: first safety net 113b: second safety net
113c: Third safety net 114: Fixing bar
114a: first fixed bar 114b: second fixed bar
114c: Third fixing bar 115: Hinge
116: clamp
120: Planar heating element 121: Carbon belt
122: copper foil 123: insulating film
124: Power supply terminal
130: Spacing adjuster
140: fixture
150: blowing fan 151: speed regulator
152: motor
160: Wind pressure sensor
180: control unit
190: Base frame

Claims (10)

A hot air blower body (110) with open front and rear sides;
A carbon band 121, which is a heating film, is printed on the base film, copper foil 122 is mounted on the front and rear ends of the carbon band 121, and wrapped with an insulating film 123, power is supplied, and the heater main body 110 A planar heating element 120 installed in a spirally rolled state on the main body front part 111 of;
A spacing adjuster 130 disposed between the surfaces of the planar heating element 120 to form an empty space;
A cylindrical fixture 140 inserted into the center of the planar heating element 120 to form an empty space;
A blowing fan 150 that removes air from the rear portion 112 of the heater main body 110 to the planar heating element 120 and supplies heated air to the front of the heater main body 110;
It includes a control unit 180 that controls the speed of the blowing fan 150 according to the temperature of the planar heating element 120;
The planar heating element 120 has a temperature higher on the side closer to the blower fan 150 than on the side further away,
The heating film is a carbon band (121) formed by printing conductive carbon ink in a plurality of bands on a base film,
The conductive carbon ink contains 20 to 60 parts by weight of resin, 5 to 15 parts by weight of carbon, 10 to 20 parts by weight of graphite, and 0.01 to 1 part by weight of carbon nanotubes (CNTs) per 100 parts by weight of solvent,
The solvent is any one selected from the group consisting of butyl cellosove, butyl cellosolve acetate, and ethyldiglycol acrylate,
The resin uses one or more selected from the group consisting of epoxy resin, phenol resin, polyethylene terephthalate resin (PET resin), PE resin, polyurethane resin (PU resin), and nitrocellulose resin (NC resin),
When forming a plurality of carbon bands 121 by printing conductive carbon ink on the base film, the width of the carbon bands 121 is 5 to 30 mm, and the distance between the carbon bands 121 and the adjacent carbon bands 121 is 1. It is ~30㎜,
Cutting the carbon strip 121 at a ratio of 1:1 up to 1 m, 1:2 up to 1 to 2 m, and 1:3 from 2 to 3 m,
Carbon nano-based heating system.
According to paragraph 1,
The hot air blower main body 110 includes a main body front part 111 where the planar heating element 120 is disposed, a main body rear part 112 where the blowing fan 150 is disposed, and a front end of the main body front part 111. A safety net 113 and a cross-shaped fixing bar 114 are installed respectively.
Carbon nano-based heating system.
According to paragraph 1,
The planar heating element 120 has a diameter smaller than the diameter of the heater main body 110 when rolled up in a spiral shape,
The fixture 140 has a diameter smaller than the diameter of the planar heating element 120 so that it is inserted into the center of the planar heating element 120 inserted into the heater main body 110,
Carbon nano-based heating system.
According to paragraph 1,
A wind pressure sensor 160 that detects air flow at the front of the blowing fan 150; and
A temperature sensor that detects the temperature of the planar heating element 120; Containing more,
Carbon nano-based heating system.
According to paragraph 1,
The central portion of the heater body 110 is cut vertically or horizontally,
One side where the horizontally cut upper body (110a) and the lower body (110b) are joined are provided with a hinge (115), and the other side is detachably opened and closed using a clamp (116).
Carbon nano-based heating system.
delete According to paragraph 1,
When printing the carbon strip (121), the left and right dark color difference is printed with a difference of 20 to 95%,
Carbon nano-based heating system.
delete According to paragraph 1,
A planar heating element is formed by printing silver ink overlapping on the carbon band 121 formed by printing conductive carbon ink on the base film,
When printing the silver ink, the width is 1 to 20 mm,
Carbon nano-based heating system.
delete