KR20180028573A - Plane heater for heating cabinet and the control method thereof - Google Patents

Abstract

A plane heater for a heating cabinet is disclosed. According to the present invention, the plane heater for a heating cabinet is installed inside a heating cabinet to heat by a power supply unit applied from the outside. The plane heater comprises: a first substrate printing a first pattern heated by power supplied from the power supply unit with conductive ink; a second substrate printing a second pattern heated by the power supplied from the power supply unit and having the same shape as the first pattern of the first substrate on one surface with the conductive ink; and an adhesive layer attaching the patterns of the first and second substrates to be vertically overlapped. Therefore, the plane heater has better heating performance than that of the existing heater, and an electromagnetic wave can be effectively shielded since a current flows in a reverse direction on both surfaces of the substrate by applying a reverse current patterning technology.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a planar heating element for a warm-

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a surface heating element, and more particularly, to a surface heating element used as a heating source for a silicon heater used in a heating cabinet to maintain the temperature of food including beverages at a predetermined temperature, And a method of controlling the heat generation thereof.

Generally, in this beauty shop, nail shop, skin beauty shop, massage shop, restaurant, and physical therapy room, always use hot water heater with built-in heating device to use steam towel or beverage heated to set temperature.

Such a warming cloth is used to heat a heating object (for example, a wet towel or a beverage) placed in the room to a predetermined temperature through a silicone heating device to store the heating object for a long period of time. A heating space for heating is formed, and the heating space may be provided with multi-layer shelves so as to store heating objects.

Such a heating device conventionally uses a silicon heater to generate heat, and thus has a risk of fire due to overheating, and also requires a separate heating space, which results in a bulky and high power consumption.

KR Patent Publication No. 10-1567480 (Feb.

Another object of the present invention is to provide a planar heating element for a warm-up heating which can be used as a heat source by being installed on a shelf of a warming-up heater and a method for manufacturing the same.

It is still another object of the present invention to provide an area heating element for a warm spot which can generate heat on the surface instead of local heat.

It is still another object of the present invention to provide a planar heating element for a warm-up heater that can suppress magnetic waves by applying a reverse current patterning technique and a method for manufacturing the same.

It is still another object of the present invention to provide an area heating element for a warm lamp capable of producing a film type surface heating element by using the R2R gravure printing method and a method of manufacturing the same.

It is another object of the present invention to provide a planar heating element for a warm-up heater that can perform a fuse function when heated above a predetermined temperature, and a method of manufacturing the same.

In order to solve such a problem, a planar heating element for a warming-up heater, which is formed inside a heating appliance of the present invention and is heated by a power source applied from the outside, includes a first pattern printed with a conductive ink, A second substrate which is heated by a power source supplied from the power source unit on one surface of the substrate and printed with a conductive ink in a second pattern having the same shape as the first pattern of the first substrate, And a planar heating element including a pressure-sensitive adhesive layer which is adhered so that the pattern of the substrate is superimposed on top and bottom.

In addition, the first pattern and the second pattern may be printed by a roll lureol gravure printing apparatus, and the roll-to-roll gravure printing apparatus may include a feeding roller for feeding a substrate in a roll state, And an ink injector for applying a conductive ink to the engraved pattern drawn out from the plate making roller.

Meanwhile, the planar heating element for heating according to another embodiment of the present invention may include a first pattern formed on one surface of the first substrate by a power source supplied from the power source, And a planar heating element printed on the other surface of the first substrate with the conductive ink and the second pattern having the same shape as the first pattern printed on the other surface with the conductive ink.

Wherein the first and second patterns are printed by a roll lureol gravure printing apparatus, and the roll lureol gravure printing apparatus includes: a feeding roller for feeding a substrate in a roll state; A first inking unit for applying a conductive ink to the engraved pattern drawn out from the first plate making roller; and a second inking unit for supplying the substrate drawn out from the first ink injecting unit to the other surface of the substrate, And a second ink injector for applying a conductive ink to the engraved pattern drawn out from the second plate making roller.

Further, a first electrode composed of a "+" electrode electrically connected to one end of the first pattern and an "-" electrode electrically connected to the other end, a "+" electrode electrically connected to one end of the second pattern, And a second electrode composed of an electrically connected "- " electrode, wherein the first electrode and the second electrode are formed at the same position around the substrate.

One end of the first pattern is connected to the " + "terminal of the first electrode and the other end is connected to the" - "terminal of the first electrode connected to the outer periphery of the shelf of the warming- Terminal of the second electrode is connected to the " + "terminal of the second electrode and the other end is connected to the" - "terminal of the second electrode by being connected along the outer peripheral surface of the bottom shape of the warm- When a certain portion of the shape has a space capable of accommodating two or more patterns, the pattern can be repeated alternately without a short circuit.

Further, it is preferable that the planar heating element is positioned between the bottom material of the warming ware and the shelf.

And the pattern is formed so as to be disconnected when the substrate is thermally deformed.

Therefore, according to the planar heating element for a warming-up of the present invention and the method for manufacturing the same, it is possible to drive with a low power relative to a conventional hot wire, and the power consumption is reduced over time.

According to the planar heating element for a warming-up plate and the method for manufacturing the same according to the present invention, since it is a film type planar heating element using electricity as a power source, it can be installed in a narrow space of a warming- It is effective.

Further, according to the present invention, it is possible to shorten the heat generation time and drive with a low power per unit area because the space is heated in a plane.

According to the planar heating element for a warm lamp and the method for manufacturing the same according to the present invention, current is flown in opposite directions on both sides of a substrate by applying a reverse current patterning technology, so that electromagnetic waves can be effectively shielded.

Further, according to the present invention, there is provided an area heating element and a method of manufacturing the same according to the present invention, which is printed using the R2R gravure printing method.

According to the present invention, it is possible to safely use the surface heat generating element for a warm lamp and the method for manufacturing the same, since the fuse function can be performed by disconnection of the pattern due to thermal expansion of the substrate when heated above a predetermined temperature.

1 is a perspective view of a warming garage to which an area heating element according to an embodiment of the present invention is applied,
FIG. 2 is a main configuration diagram for controlling an area heating element for a warming-up area according to an embodiment of the present invention;
3 is a cross-sectional view of a planar heating element according to an embodiment of the present invention,
4 is a plan view of the planar heating element,
5 is another plan view of the planar heating element,
6 is a view for explaining a pattern for forming a reverse current in the surface heating element,
7 is a sectional view of a planar heating element according to another embodiment of the present invention,
FIG. 8 is a flow chart for explaining a manufacturing method of a planar heating element for a warming-
9 is a view showing a roll-to-roll gravure printing apparatus for producing the planar heating element of the present invention,
And,
10 is a view showing another embodiment of a roll-to-roll gravure printing apparatus for producing the planar heating element of the present invention.

It is to be understood that the words or words used in the present specification and claims are not to be construed in a conventional or dictionary sense and that the inventor can properly define the concept of a term in order to describe its invention in the best possible way And should be construed in light of the meanings and concepts consistent with the technical idea of the present invention.

Throughout the specification, when an element is referred to as "comprising ", it means that it can include other elements as well, without excluding other elements unless specifically stated otherwise. It should be noted that the terms such as " part, "" module, " .

It is to be understood that the term "and / or" throughout the specification includes all possible combinations from one or more related items. For example, the meaning of "first item, second item and / or third item" may be presented from two or more of the first, second or third items as well as the first, second or third item It means a combination of all the items that can be.

Identification codes (e.g., a, b, c, ...) in each step throughout the specification are used for convenience of description, and the identification codes do not limit the order of each step, Unless the context clearly states a particular order, it may take place differently from the stated order. That is, each step may occur in the same order as described, may be performed substantially concurrently, or may be performed in reverse order.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view of a heating appliance to which an area heating element according to an embodiment of the present invention is applied. As shown in FIG. 1, the heating appliance 200 includes a door 240 and one or more shelves 220 and 230 in a cabinet. And an operation panel 210 for controlling the temperature of the front panel.

The surface heat generating element of the present invention may be installed in various places such as doors and cabinets of a heating cabinet in order to store food in place of a conventional silicone heater. In the present invention, however, As shown in FIG.

It is needless to say that at least one such surface heat emission element 100 may be provided for each shelf or an enemy.

Referring to the enlarged view of FIG. 1, heat is generated between the bottom surface 250 and the shelf 230 through the surface heating element 100.

However, since the planar heating element of the present invention is formed in the form of a film, it is needless to say that the planar heating element may be interposed within a conventional shelf.

2, in order to drive the planar heating element of the present invention, a key input unit 215 having a temperature control key and a power key for controlling the temperature of the heating plate, And a controller 211 for controlling the surface heat emission element 100 according to the temperature control of the key input unit 215.

The control unit 211 senses the temperature from the sensor 213 provided at one side of the warming room and drives the driving unit 212 to maintain the temperature controlled by the key input unit 215 to stop the heat generation and interruption of the surface heating unit 100 .

When the predetermined temperature is set in the key input unit 215, the controller 211 heats the planar heating element 100 through the driving unit 212, senses the temperature through the sensor 213, When the temperature is reached, the bimetal 214 is driven to shut off the power applied to the driving unit 212, that is, the surface heating element 100.

It is needless to say that it is possible to drive each of the one or more surface heat emission elements individually or simultaneously according to the set amount of the temperature.

Hereinafter, the planar heating element of the present invention will be described with reference to the drawings.

3, the planar heating element 100 of the present invention may be formed by printing a first pattern 140, which is a silver heating line, with a conductive ink on the first substrate 110, A second pattern 141 which is a silver heating line printed with a conductive ink is printed on the adhesive layer 111 and then adhered to the adhesive layer 112 and power terminals 120 and 121 for supplying power to the respective patterns are formed .

 The carbon layers 130 and 131 may be laminated on the upper surfaces of the patterns 140 and 141, respectively, or an electromagnetic wave shielding layer may be laminated to be used as a protective layer.

It is an object of the present invention to provide an effect of shielding a magnetic wave in the form of a pattern without forming another structure so that a silver heating line is equally formed on different substrates and a flowing current flows in a reverse current to cancel a magnetic wave It has one feature.

That is, since the present invention aims at effectively shielding magnetic waves by applying a printing electronic technique and a reverse current printing patterning technique, if the same pattern is formed on another substrate and then the same pattern is formed thereon, So that the magnetic wave is canceled.

Therefore, when the substrates are laminated, the patterns must be formed to be coincident with each other. Therefore, the electrodes are formed at the same position and the patterns are formed in the same manner, but only the patterns connected to the electrodes are used.

For convenience of explanation, it is described that the patterns are printed on different substrates and joined together, but the present invention is not limited to this, and it is noted that the patterns can be printed on both sides of the substrate.

7, a first pattern 140, which is a silver heating line, is printed on one surface of a first substrate 110 with a conductive ink, and a second pattern 140 is printed on a second surface of the first substrate 110, A second pattern 141 which is a silver heating line printed on the other side of the upper and lower patterns 140 and 141 and then a carbon layer 130 and 131 laminated on the upper surface of the upper and lower patterns 140 and 141, The first and second electrodes 120 and 121 may be formed.

First, referring to a plan view of the planar heating element according to an embodiment of the present invention shown in FIG. 4, the first substrate 110 is provided on a shelf of a heating cabinet and is heated in a plane so that the temperature in the heating cabinet can be maintained at 30 ° C. to 70 ° C. It is used and cut into a surface shape similar to the outer shape of a shelf of a warm-temperate greenhouse.

Although it is cut in a square in the drawing, it is obvious that it can be changed according to the appearance of the warming cloth.

+ Electrode 120a "and" -electrode 120b "are sequentially arranged on one surface of the first substrate 110. In the first pattern 140 of the present invention, The pattern is connected to the opposite side of the electrode 120b, and the pattern is separated by a predetermined distance and then connected to the electrode in the direction of the electrode.

In the drawing, the patterns connecting the "+ electrode 120a" and the "-electrode 120b" are illustrated as being formed in a single pattern without a short circuit, but the present invention is not limited to this. Quot; + "electrode and the" - " electrode, rather than forming the pattern associated with the " + " electrode in a single pattern repeated alternately within the shape of the substrate, So that the heat generation temperature can be raised quickly.

More specifically, the first pattern 140a connected to the " + "electrode 120a extends to one end of the substrate 110 in the right direction centering on the figure, The electrode 120b is connected to the electrode 120b by repeating the method of extending the electrode to the upper end and then connecting the electrode to the upper end of the first substrate 110 in the right direction.

In addition, since the present invention is characterized in that magnetic wave is effectively blocked by applying a printing electronic technique and a reverse current printing patterning technique, if the same pattern is formed on another substrate and then the same pattern is laminated, And reverses the direction of the current so that the magnetic wave is canceled.

Therefore, when the substrates are laminated, the patterns must be formed to be coincident with each other, so that the patterns should be formed in the same manner, and it is convenient to form the electrodes at the same position as possible.

Since the planar heating element forms a pattern using a printing technique on a substrate composed of a film, it is necessary to reduce the number of possible electrodes because forming an electrode is an important factor for determining the thickness of the heating element on the whole surface.

Referring to the plan view of another planar heating element of Fig. 5,

The positive electrode 121a and the negative electrode 121b are sequentially arranged on one surface of the second substrate 111 and the second pattern 141 of the present invention is formed on the surface on which the " + "electrode 121a is formed The pattern is connected to the opposite surface of the electrode 121b, and the pattern is separated by a predetermined distance and is then connected to the electrode in the direction of the electrode.

More specifically, one end of the second pattern 141a is connected to the " + "terminal 121a of the first electrode 121, and the other end is connected along the outer circumferential surface of the bottom of the warm- Terminal "-" 121b.

That is, the second pattern 141 connected to the "+" electrode 121a extends up to the upper end of the second substrate 111 in the upward direction with respect to the drawing, The electrode 121b is extended to the right side, and then a predetermined distance is alternately connected to the right direction.

As a result, in the second pattern in the present invention, the electrode terminals are sequentially arranged in the "+ electrode 121a" and the "-electrode 121b", and the pattern is formed as a closed circuit so as to generate heat on the surface.

That is, the "+ electrode 121a" and the "-electrode 121b" are sequentially arranged and a second pattern is formed along the shape of the substrate to constitute a closed circuit to generate heat when the current flows.

(+) Electrode 121b and the (-) electrode 121b are sequentially arranged on one surface of the second substrate 111, and the (+) electrode 120b of the first substrate 110 and Are formed at corresponding positions of the "-electrode 120a ", the electrodes are formed at the same position, and the patterns connected to the respective electrode terminals are connected in opposite directions so as to match the patterns.

6, a pattern connected to the positive electrode 121a and a pattern connected to the negative electrode 121b are formed in opposite directions to each other in the pattern for forming the reverse current in the planar heating element of FIG. 6 .

The positions of the electrodes are the same but only the pattern portion connected to the electrode is changed so that only the direction of the current flows in the same pattern in the opposite direction.

The matching of these electrodes is intended to enable easy connection of the terminals by using a simple reinforcing bell when lapped, so there is no reason to limit the position of the electrodes.

That is, since electrodes formed on both sides of a substrate or on different substrates of the substrate have the same polarity at the same position on the upper and lower sides, electrodes can be easily connected using two-hole bets or other direct electrode connection methods for connecting the upper and lower electrodes It is a feature of what can be done.

Therefore, if the electrodes are positioned in the same manner as the pattern, the positions of the electrodes may be formed at different positions as required.

In the present invention, since it is desirable to place the surface heating element on the shelf of the warming shelter, the electrode should be formed in a substantially rectangular shape along the shelf of the warming shelter in structure so that the electrode is positioned at approximately one corner of the substrate.

Referring to FIG. 1, when a first substrate 110 and a second substrate 111 are laminated together, a pattern is superimposed like a mirror with respect to the adhesive layer 112.

Therefore, in order to apply the reverse current printing patterning technique to the overlapping pattern, if the direction of the current flowing through each pattern is reversed, the electromagnetic waves are canceled.

As described above, the present invention applies the printing electronic technology and the reverse current printing patterning technique to effectively block the magnetic waves by effectively printing the same pattern on different substrates and laminating them.

Since the electrodes are formed on each substrate using the reverse current patterning technique as described above, the electrodes of the respective substrates are connected by using the rechargeable electrodes to secure the characteristics of the film, and when the power is applied through the electrode portions So that stability can be ensured.

Hereinafter, a manufacturing process of the warming-and-tempered-surface heating element will be described.

First, each substrate 110, 111 of the first surface heating element uses PET (polyethylene terephthalate) or PI (polyimide) film and is used in a printing process.

Here, PET is thermoplastic and PI is thermosetting, but in the present invention, PET or PI can be used so that it can be selected and used if necessary.

That is, since PET is thermoplastic, it can be applied at low temperature, and PI can be applied at high temperature. Thus, if desired, either PET or PI may be used as the substrate and coated on the substrate.

It goes without saying that PVB, EVA or TPU (thermoplastic polyurethane) may be used as the substrate in the present invention.

In the present invention, when a voltage is applied to the heating lines 140 and 141 printed on the substrates 110 and 111 with the conductive ink, the current is generated to uniformly generate heat on the surface through the heating elements.

Preferably, the amount and the manufacturing method of the ink should be different from each other so as to generate heat at the respective desired high temperatures, and development should be made for each situation.

As the conductive ink, a silver paste, a carbon paste, a carbon nanotube, a silver nano ink, or the like can be used.

When a silver heating line is used, a silver nano gel is generated and then a heating wire is printed on the first substrate 110 with a conductive silver ink containing a nano-gel.

If necessary, a conductive material may be laminated on the carbon layers 130 and 131 to form an insulating layer for preventing the heating lines 140 and 141 from being damaged, an electromagnetic wave shielding effect, and a flexible material.

The heat-generating protective film of the present invention has a heat-shielding function as a main object, but the conductive fabric of the present invention is intended to supplement electromagnetic wave shielding function.

That is, the conductive fabric is intended to shield the electromagnetic wave in detail but complementarily by the reverse current printing patterning technique of the present invention.

In addition, a permalloy layer (not shown) may be further layered on the conductive fabric to shield the magnetic field more effectively.

Permalloy is an alloy of about 80% nickel and 20% iron. It has excellent magnetic permeability and low loss of magnetic hysteresis. It is easy to work with excellent magnetic material. Be easy

In addition, when a wall is made with permalloy, the outside magnet can not be absorbed into the wall and enter the inside. Conversely, if the magnetic field is blocked by a permalloy wall, the magnetic field can not go out.

The electromagnetic-shielding heat-generating film of the present invention constituted as described above is completed through thermal drying, and a thermal drying temperature of 100 to 200 ° C and a drying time of 1 to 60 minutes are suitable.

Further, the present invention is characterized in that the substrate or the heating line performs a fuse function at a certain temperature by allowing a pattern, that is, a heating line to be opened by thermal expansion of the substrate.

That is, when the substrate heated at a predetermined temperature expands, the heating line is disconnected to prevent a fire or the like.

For this, the strain temperature of the film differs according to the type of the film, that is, the type of the substrate, so it is necessary to control the breaking point at various temperatures.

Therefore, the degree of arbitrary deformation at a constant load should be confirmed by referring to the plastic resin heat distortion temperature (HDT) of the film used as the substrate of the present invention.

The heat distortion temperature refers to the temperature at which the specimen is deformed in the process of fixing the specimen to be tested to the measuring holder and immersing it in the silicone oil by applying a specified load and then heating the specimen at a constant speed. do.

Table 1 illustrates the thermal deformation temperature of the plastic resin (source: thermal deformation of UV curing / author UV SMT)

Number Name Heat deformation temperature (캜) PE 40 ~ 85 PP 100-110 PS 60 ~ 95 ACRYLIC RESIN 70 to 90 A.B.S RESIN 70 ~ 105 PA 130 ~ 180 PVC 70 ~ 80 ABS 75 ~ 87 PET 140 to 240 PC 100-130 PI 270 to 280 PMMA (acrylic) 90-110

If reference is made to this, the temperature at which thermal deformation occurs depending on the material of the substrate can be known. Therefore, when the material is appropriately selected according to the purpose of use, heat distortion occurs in the substrate during overheating, You can do it.

In this case, the direction of thermal deformation of the substrate must be aligned with the direction of the pattern so that it can be easily broken.

17 is a flowchart for explaining a method of manufacturing the planar heating element of the present invention. As shown in the figure, the planar heating element of the present invention includes a step (S100) of forming a heating plate on one surface of a first substrate, And forming a heating plate (S200).

The step of forming a heating plate on one side of the first substrate S100 includes a step S110 of preparing a first substrate 110, a first pattern 140, which is a silver heating line, as a conductive ink on one side of the prepared first substrate, A conductive ink printing step S120 of printing a conductive ink, a step S130 of forming an electrode, a conductive ink printing step S130, and a step S140 of laminating a conductive cloth, ), And a drying step (S150).

Further, before performing the conductive ink printing step (S120), it may be subjected to a step of producing a conductive ink used for printing.

For example, in order to produce a conductive silver ink, a silver nano gel is first produced and then a conductive silver ink containing a silver nano gel is prepared.

First, silver nano-gel is prepared by dissolving 0.3 g of AgNO _{3 in} 10 ml of distilled water.

That is, when silver (Ag) having a nanoparticle size is mixed with nitrate (No ₃ ), 0.3 g of silver oxide (AgNO ₃ ) is dissolved in 10 ml of distilled water to prepare a silver ion aqueous solution.

In the present invention, silver oxide is dissolved in distilled water to prepare an aqueous silver ion solution. However, an aqueous solution of silver oxide (CH ₃ COOAg) of silver (Ag) and acetic acid (CH ₃ COO) having a nanoparticle size is dissolved in distilled water, Ion aqueous solution.

Next, a polymer binder having at least one selected from a polymeric pyrrolidone, a polymer urethane, and a polymeric amide group is added to the prepared silver ion aqueous solution, a dispersant is added thereto to be uniformly dispersed and stirred, and 10% hydrazine ( N ₂ H ₄ ) aqueous solution was added slowly and stirred for additional 3 hours to prepare a dark green solution.

Thereafter, 20 ml of acetone was added, and the mixture was stirred for 1 minute and then centrifuged at 6000 rpm for 30 minutes using a centrifuge. 0.1 g of diethanol 2,2-azobis was added to the obtained silver precipitate, 0.2 g of nano-gel is prepared.

After preparing the silver nanogel as described above, a conductive silver ink containing silver nanogels is prepared. The conductive paste is dispersed in a solvent at room temperature, and epoxy, silver particles and a curing agent are added and stirred, A conductive ink containing a gel is produced.

First, a roll-to-roll gravure printing method, a rotary screen, a gravure offset, or the like can be used as the surface heating element of the present invention, but the present invention uses a roll-to-roll gravure printing method.

First, a first substrate 110 made of PET or PI is prepared (S110).

A first pattern 140, which is a silver heating line, is first formed on the first substrate 110 using the conductive ink on the first substrate prepared in step S110 (S120).

16 is a view showing a roll-to-roll gravure printing apparatus for producing a planar heating element according to the present invention. The planar heating element manufacturing apparatus of the present invention comprises a plate-making roller 11 provided with a positive mold, a first substrate (film, WEB) One or more guide rollers 17a and 17b for guiding the sheet 110, a feeding roller 15 for feeding the substrate, and a take-up roller 16 for winding the first substrate 110 on which the pattern is printed on one side .

First, the embossed printing mold is produced and then bonded to the plate-making roller 11. [

The printing mold is completed by coating a photoresist on the surface of the substrate, forming an embossed pattern through ultraviolet (UV) exposure, development and metallization, electroplating, and a cleaning step to remove ink remaining on the surface.

More specifically, in order to form a printing mold, a photoresist is coated on a surface of a substrate for forming a pattern through a photo-lithography process, thereby forming a photosensitive coating layer.

At this time, the photoresist coating can be coated using any one of spin coating, slit-to-spin coating, slit coating, and capillary coating.

In addition, the photoresist coating step is an important process step in determining the depth of the pattern through the coating thickness.

When a photoresist is coated on a substrate, the substrate is subjected to a UV (ultraviolet) exposure step, a development, metallization, electroplating, and a cleaning step to form a relief pattern.

The pattern formation is to form a pattern by exposing the UV light to the coating part through the mask, and to melt the uncured part in the development process to form the pattern.

Here, since the irradiation (exposure) of the photoresist can be suitably performed in accordance with the sensitivity of the photoresist, appropriate intensity and wavelength band are selected and irradiated. For example, a wavelength in the range of 200 to 300 nm can be used and exposed for 2 to 15 seconds under an intensity of 1 to 100 mW / cm ² .

When the photoresist selectively irradiated with the photomask is developed with a developing solution, the photoresist is melted due to the difference in solubility to form a pattern. The developing solution used herein may be KOH, NaOH, TMAH (Tetra Methyl Ammonium Hydroxide) or the like as a salt machine.

The pattern formed by this process is dry-coated with a conductive material using a conductive material. The coating can use all wet and dry processes. A dry coating is advantageous to form a more precise pattern. Plating is performed on the coated surface using electroplating. When the plating is completed, the plating material and the object to be plated are separated to produce a plate-making roller or sheet, and electroplating can be repeatedly used if necessary.

The printing mold completed in the above-described process is then attached to the plate-making rollers in the roll-to-roll process, or is used to manufacture an engraved film by an engraving film and a transparent conductive film manufacturing process, and is made of a transparent conductive film.

After the printing mold is prepared by the above-described process, the process of manufacturing an engraved film by UV molding is performed.

The step of manufacturing the intaglio film by the UV molding uses an imprinting device that transfers the patterned surface shape to the printing mold without changing the dimension.

Before the first substrate 110 wound on the feeding roller 15 is fed to the plate-making roller 11 through the at least one guide roller 17a and 17b, the first plate 110 and the plate- Curing type resin is injected through a resin injector 12 between the substrate 11 and the substrate 11. The pattern is imprinted through the plate making roller 11 and exposed to the UV irradiator 41a to form an engraved pattern on the transparent substrate To form an engraved film.

The conductive ink is applied to the formed embossed film through the ink injector 13, and then the conductive ink is applied to the engraved film to remove the residual ink through the bladder if necessary.

In the step S130, the electrode 120 is formed on the first pattern 140 printed by the electrode forming step, and the + electrode 120b and the - electrode 120a are provided as described above. Alternatively, the ink may be added after the ink printing step (S120), but the electrodes may be formed after the heating plate is formed on both the substrates.

After the electrode forming step S130, a conductive heating material is laminated on the upper side of the first pattern 140 to laminate the conductive material to form a heating plate on one side of the substrate through a step S140 and a drying step S150. do.

In the step of drying in step S150, the thermal drying temperature is preferably 100 to 200 DEG C, and the drying time is preferably about 1 to 60 minutes.

It goes without saying that, in step S150, the heating plate may be formed on both substrates, and then the drying step may be performed.

After the heating plate is formed on one side of the substrate in steps S110 to S150, a step of forming a heating plate of the same pattern on the other side of the second substrate 111 is performed (S200).

That is, when the heating plate is completed on the first substrate 110 of the step S100, the other second substrate 111 is charged again and the steps S110 to S150 are repeated to complete the heating plate on one surface of the other substrate through the steps S210 to S250 .

Meanwhile, in the above description, it has been described that a planar heating element is manufactured by forming patterns on different substrates and joining them to each other. However, it is also possible to form a pattern on both sides of a substrate by using one substrate .

In this case, in the roll-to-roll gravure printing apparatus shown in Fig. 10, a web turn bar for feeding the substrate upside down in the process of connecting to the take-up roller 16 is provided, The process can also complete a two-sided pattern.

That is, in the case of forming a pattern on both sides of the substrate, the pattern is completed in the process of Fig. 8, and the substrate wound on the take-up roller 16 is again supplied to the same roll-to-roll gravure printing apparatus as in Fig. In addition, it is also possible to complete a two-sided pattern in succession using a web turn bar.

10, a heating line is printed on one surface of a substrate and fed to the web turn bar 20 to form a heating wire on the other surface of the substrate And the heating line is printed by the continuous process.

The web turn bar 20 inverts the pattern printed on the first surface of the first substrate 110 to turn over the substrate so that a pattern can be printed on the other surface of the substrate.

In order to print a pattern on the other side of the first substrate 110 supplied from the web turn bar 20, the inverted first substrate 110 is guided by one or more guide rollers 17d through a plate- And a take-up roller 16 which is supplied to the pattern 11a and on which a pattern printed on both sides is taken up.

16, in the same manner as in the method of FIG. 16 for forming a pattern on one side of the above-described substrate, a UV light is formed by coating a photosensitive agent on the surface of the substrate to be charged in the reverse direction in the web turn bar 150, Conductive ink printing step to complete the pattern on both sides of the substrate.

Specifically, an embossed printing mold is manufactured and then bonded to a plate-making roller 11a. A UV curable resin is injected through a resin injector 12a between a provided first substrate 110 and a plate-making roller 11a, And irradiates UV light through the irradiator 41b to produce a transparent surface heating element having a pattern of intaglio on its surface.

As described above, the surface heating element for a warming-up plate of the present invention can change the electric conductivity depending on the type of ink and the printing process control. Therefore, in the present invention, the conductive ink may be an Ag nano ink, a carbon ink, a copper ink, (Aluminum paste) or a conductive silver ink can be used. The larger the size of the aluminum particles, the smaller the specific resistance. Therefore, the aluminum particles having a large radius can be used in terms of the resistivity. However, if the size of the aluminum particles is large, the surface formed using the large aluminum particles may be porous, so that the aluminum paste preferably includes aluminum particles having an average radius of 5 탆 or less.

On the other hand, aluminum particles having a large radius can be used. However, if the size of the aluminum particles is large, the surface formed using the large aluminum particles may be porous, so that the aluminum paste preferably includes aluminum particles having an average radius of 5 탆 or less.

In particular, the aluminum paste is advantageous for use as a heating element because it has a strong resistance to water vapor because it forms a solid barrier against moisture permeability because AL particles form several layers horizontally, and the pattern is various A pattern of patterns can be formed.

In other words, it is possible to maintain fine line width through intaglio printing and to print a fine pattern (1 mu m to 5 mu m) having a large area uniformity, so transparency can be maintained without being visually recognized.

In this step, the electrode forming steps (S130 and S230) and the drying steps (S150 and S250) may be selectively applied to each step, but the heating plate may be formed on each substrate and then subjected to an electrode or a drying step .

If a heating plate is formed on each substrate in steps S100 and S200, the two substrates are joined together to complete the surface heating element according to an embodiment of the present invention (S300).

In step S300, the two substrates 110 and 111 are adhered to each other with the adhesive 112, and the patterns of the respective substrates are lapped so as to coincide with each other as described above.

Thereafter, the electrode terminals of the upper and lower substrates are connected to each other by using a simple re-belling method on the electrode of the laminated substrate to complete the planar heating element of the present invention (S400).

In addition, since the planar heating element of the present invention uses a reverse current printing patterning technique, it is preferable to use an AC power source for the electrode.

By using the reverse current, it is possible to shield the electric wave by effectively shielding the magnetic wave and applying the conductive ink to which the ground wire such as carbon, silver, and aluminum can be connected.

Test results obtained by comparing the magnetic field measurement by the current direction of the heat-generating film produced by the above-described method will be described below.

Table 2 shows the results of measurement of the exothermic film produced in Production Example 1.

standard 400 x 600 How to print Screen / Section Sample information Width / 4.5mm, interval / 3mm, 1line Applied voltage 220V Manufacturing method Using two samples,
Position of electrode is same
Current direction same Measuring position Active partial measurement Measure the central part Measures Not measurable 10.67mG

In the case of Production Example 1, the measurement was impossible due to the high value of the magnetic field measured at the electrode portion, and the value of 10.67 mG at the measurement of the magnetic field at the center portion was confirmed.

Table 3 shows the results of measurement of the exothermic film produced in Production Example 2.

standard 400 x 600 How to print Screen / Section Sample information Width / 4.5mm, interval / 3mm, 1line Applied voltage 220V Manufacturing method Use 2 samples
Reverse electrode direction
Reverse current direction Measuring position Edge measurement Measure the central part Measures 0.59 mG 0.48 mG

In the case of Production Example 2, a remarkably reduced value of 0.59 mG and 0.478 mG was observed at the electrode portion and the center at the center of the magnetic field, respectively. Production Example 3 was prepared and measured for further reduction.

Table 4 shows the results of measurement of the heat-generating film produced in Production Example 3.

standard 400 x 600 How to print Screen / Section Sample information Width / 4.5mm, interval / 3mm, 1line Applied voltage 110V Manufacturing method Use 2 samples
Same as electrode direction
Current direction intersection Measuring position Measure electrode part Measure the central part Measures 5.37mG 0.049mG

In the measurement results of Production Example 3, it can be seen that the magnetic field value at the central portion excluding the electrode portion is almost 0.049 mG.

That is, like the magnetic wave shielding heating film of the present invention, a pattern is formed on one surface of each substrate, and patterns of one substrate and another substrate are printed so as to overlap each other, will be.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art.

12: Resin injector 13: Ink injector
15: feeding roller 16: winding roller
17a, 17b: guide roller 41a: UV irradiator
100: plane heating element
110, 111: Substrate 120, 121: Electrode terminal
120a, 121a: positive electrode 120b, 121b: negative electrode
130, 131: carbon layer 140: first pattern
141: Second pattern 200:
210: operation panel 211:
212: driver 213: sensor
214: Bimetal
215: key input unit 220, 230:
240: Door 250: Flooring

Claims (10)

A planar heating element for a warm spot, which is formed inside a heating compartment and is heated by an external power source,
And a second pattern of the same shape as that of the first pattern of the first substrate, wherein the first pattern is formed of a first pattern printed with a conductive ink and a first pattern printed by a power source supplied from the power source unit, A planar heating element including a second substrate printed with a conductive ink, and an adhesive layer adhering the first substrate and the second substrate in such a manner that the patterns of the first substrate and the second substrate overlap with each other;
And a heat radiating member for heating the warming plate.
The method according to claim 1,
A first electrode composed of a " + "electrode electrically connected to one end of the first pattern and a" - "electrode electrically connected to the other end;
A second electrode composed of a " + "electrode electrically connected to one end of the second pattern and an" - "electrode electrically connected to the other end;
Wherein the first electrode and the second electrode are formed at the same position with respect to the substrate.
The method of claim 2,
The surface heating element
One end of the first pattern is connected to the " + "terminal of the first electrode, and the other end is connected to the "-" terminal of the first electrode connected to the outer periphery of the shelf-
One end of the second pattern is connected to the " + "terminal of the second electrode and the other end is connected to the" - "terminal of the second electrode connected to the outer periphery of the bottom shape of the warm- 2 A planar heating element for a warming-up hot plate, wherein any part of the shape of the substrate forms a space capable of accommodating two or more patterns, the pattern being alternately repeated without a short circuit.
The method of claim 3,
The first pattern and the second pattern
To be printed by a roll lureol gravure printing apparatus,
The roll-to-roll gravure printing apparatus
A feeding roller for feeding a substrate in a roll state;
A plate-making roller for printing a pattern of engraved on one surface of the substrate supplied from the feeding roller;
An ink injector for applying a conductive ink to the engraved pattern drawn out from the plate making roller;
And a heat radiating member for heating the warming plate.
The method according to claim 1,
The surface heating element
An area heating element for the warm spot located between the flooring of the warming room and the shelf.
A planar heating element for a warm spot, which is formed inside a heating compartment and is heated by an external power source,
A first pattern formed on one surface of a first substrate is printed with a conductive ink and a second pattern formed on the other surface of the first substrate is printed with a conductive ink Plane heating elements;
And a heat radiating member for heating the warming plate.
The method of claim 6,
A first electrode composed of a " + "electrode electrically connected to one end of the first pattern and a" - "electrode electrically connected to the other end;
A second electrode composed of a " + "electrode electrically connected to one end of the second pattern and an" - "electrode electrically connected to the other end;
Wherein the first electrode and the second electrode are formed at the same position with respect to the substrate.
The method of claim 7,
The surface heating element
One end of the first pattern is connected to the " + "terminal of the first electrode, and the other end is connected to the "-" terminal of the first electrode connected to the outer periphery of the shelf-
One end of the second pattern is connected to the " + "terminal of the second electrode and the other end is connected to the" - "terminal of the second electrode connected to the outer periphery of the bottom shape of the warm- 2 A planar heating element for a warming-up hot plate, wherein any part of the shape of the substrate forms a space capable of accommodating two or more patterns, the pattern being alternately repeated without a short circuit.
The method of claim 8,
The first and second patterns
Roll lureol gravure printing apparatus,
The roll lureol gravure printing apparatus comprises:
A feeding roller for feeding a substrate in a roll state;
A first plate-making roller for printing a pattern of engraved on one surface of the substrate supplied from the feeding roller;
A first ink injector for applying conductive ink to the engraved pattern drawn from the first plate making roller;
A second plate-making roller for supplying a substrate drawn out from the first ink injector in a reverse direction and printing an engraved pattern on the other surface of the substrate;
A second ink injector for applying a conductive ink to the engraved pattern drawn out from the second plate making roller;
And a heat radiating member for heating the warming plate.
The method according to claim 1 or 6,
The pattern
Wherein the heat sink is formed to be disconnected when the substrate is thermally deformed.

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