KR20120110932A - A heating fabric having improved heating temperature uniformity - Google Patents

Abstract

PURPOSE: Heating fabric is provided to uniformly control heating amount by instantaneously changing a resistance value by getting folded. CONSTITUTION: A power supply unit(100) supplies a power source. A base layer is comprised of a synthetic fiber, a regenerated fiber, or a natural fiber. A conductive layer which is charged with electric current is formed on the top of the base layer. A heating layer is touched with the top, bottom, or same plane of the conductive layer. Heating fabric is comprised of an insulating layer formed on the top of the conductive layer and the heating layer. A voltage control unit control voltage provided from the power supply unit. A voltage sensing unit senses a voltage value of the power supply unit. A controller(300) controls output by sensing a resistance value of the heating fabric and the voltage of the power supply unit. [Reference numerals] (100) Power supply unit; (200) Heating fabric; (301) Voltage control unit; (302) Voltage sensing unit; (304) Output control; (305) Resistance sensing unit; (306) LED module; (400) Switch

Description

A heating fabric having improved heating temperature uniformity

The present invention relates to a heat generating source that can be used for clothing, and to a source of heat having a uniform heat generating temperature that generates heat at a constant temperature regardless of a change in power supply or a change in resistance.

Smart Wear is a new product designed to use digital functions anytime and anywhere by applying new signal transmission fiber technology and embedding various digital devices in textile fashion products. In other words, it is a new type of clothing that is equipped with digital functions necessary for maintaining the properties of textiles or clothing in textile materials and clothing. For this reason, it must transmit digital signals while showing the feel and properties similar to that of ordinary fabrics. Thus, a new concept of clothing that combines the functionality of the materials (Hifunction materials properties) that the fibers or clothing itself senses external stimuli and responds to itself and the digitalized properties that the clothing and the fabric itself do not have.

Smart Wear, which has been developed for military use in the United States and Europe since the mid-1990s, is currently being actively developed in clothing and medical fields.

In particular, smart materials using printing electronic technology may be used in various military textile products of a wearable computer.

When printed electronic technology is used as an interconnection method for connecting conductive fibers, fabrics, and various parts that have clothing and electrical properties in smart materials, the application value is high because fabric-based electronic circuit design is possible. .

For example, if printed electronics are applied to military uniforms, there is a possibility of weight reduction and volume reduction, thereby enabling the development of military uniforms integrating the healing function and communication function. In modern warfare-oriented warfare, soldiers must carry more than 45kg of equipment when fully armed, so the development of this technology is urgently required.

Recently, the heating element researched for manufacturing smart wear has a function of automatically generating heat by measuring external environment and body temperature such as temperature, humidity, and ultraviolet light. However, there is an increasing demand for a more comfortable fit and durability to avoid problems in washing.

As a heating element developed so far, there is a heating element using carbon fiber yarn. Patent No. 2003-0001323 has been proposed as a "heating fabric of carbon fiber yarn and a far-infrared radiation plane heating element using the same", which is a material having excellent thermal conductivity or high far-infrared emissivity. Disclosed is a configuration in which a mixture of these compounds is impregnated to improve thermal and far-infrared characteristics.

However, the configuration as described above is to perform the heating function of the heating fabric cross-woven with carbon fiber yarn by the resistance value of the carbon fiber yarn, it is necessary to control the amount of heat by controlling the amount of carbon fiber yarn, the liquid synthetic resin to be applied only It not only has the function of protecting the heat generating fiber and radiating far infrared rays, but its characteristic components and manufacturing processes are abstractly described but not described in detail, and thus cannot be easily carried out. .

In addition, as described above, the heating fabric using carbon fiber yarn may be used in residential heating devices, medical heaters, vehicle seats, clothing thermal vests, agricultural greenhouses, beds, saunas, cooking equipments, etc. As there is a certain limit to bending or folding strong, there was a problem that the flexibility is difficult to use for clothing.

In addition, when manufactured in a portable, the power is a power supply is deteriorated over time, the heat generation temperature is lowered due to the problem that is difficult to manufacture a portable.

The present invention has been invented to solve the problems of the conventional heat generating fabric as described above, and an object of the present invention is to provide a heat generating fabric having a uniform heating temperature that can be used for clothes without limiting dynamic wearability.

In addition, an object of the present invention is to provide a heat generating material having a uniform heat generation temperature at which a constant heat generation temperature is maintained even with a change in power supply.

In addition, an object of the present invention is to provide a heat generating fabric having a uniform heat generation temperature even when the resistance value is changed due to wrinkles or folding of the fabric.

The present invention provides a power supply unit for supplying power, a base layer formed of synthetic fibers, regenerated fibers or natural fibers, a conductive layer through which current flows on top of the base layer, a part or all of which is placed on the top, bottom or the same plane of the conductive layer. Or a heating source formed of an insulating layer formed on top of the conductive layer and the conductive layer, the insulating layer formed on the conductive layer, and a voltage adjusting unit controlling a voltage supplied from the power supply unit, and detecting a voltage value of the power supply unit. Control unit consisting of a voltage sensing unit, a resistance sensing unit for sensing the resistance value of the heating element, an output control unit for adjusting the output and the microcontroller unit (MCU) for controlling the voltage adjusting unit, voltage sensing unit, resistance sensing unit, output output control unit The control unit is a heat generating temperature characterized in that for controlling the output by sensing the voltage value of the power supply and the resistance of the heating element Provide a uniform heating fabric.

In addition, the output control in the output control unit provides a heat generating raw material having a uniform heat generation temperature, characterized in that it is controlled by pulse-width modulation (PWM) output control.

In addition, between the base layer and the conductive layer, a heat generating temperature is uniform, characterized in that the primer layer is formed further selected from at least one of a polyurethane resin, an acrylic resin and a silicone resin for the surface uniformity of the base layer is formed. Provide fabric.

In addition, the primer layer is provided with a water-repellent layer in a multi-layered structure to provide a heat generating temperature uniform heat generating fabric.

In addition, the heating layer or the conductive layer is formed of a conductive material or a mixture of a conductive material and a binder, the conductive material may be polyaniline, polypyrrole, polythiophene, carbon, silver, gold, platinum, palladium, At least one selected from the group consisting of copper, aluminum, tin, iron and nickel, wherein the binder is at least one selected from the group consisting of polyurethane resins, acrylic resins, silicone resins, melamine resins and epoxy resins. It provides a heating element with a uniform heating temperature.

In addition, the insulating layer is formed by coating, printing or laminating at least one selected from the group consisting of a polyurethane resin, an acrylic resin, a silicone resin, a polyester resin, a PVC resin, and a polytetrafluoroethylene (PTFE) resin. Providing a uniform heat generating temperature, characterized in that the heat generating temperature.

In addition, the heat generating layer provides a heat generating material having a uniform heat generation temperature, characterized in that the plurality is formed with a width of 4 ~ 8 ㎠.

In addition, when the bent portion is formed in the conductive layer provides a heat generating material having a uniform heat generation temperature, characterized in that formed in a relatively wider form than a linear circuit.

In addition, the heating module is provided with an LED having a uniform heating temperature, characterized in that the LED module for indicating the power state is further formed.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. First of all, it should be noted that in the drawings, the same components or parts denote the same reference numerals as much as possible. In describing the present invention, detailed descriptions of related well-known functions or configurations are omitted in order not to obscure the subject matter of the present invention.

The terms "about "," substantially ", etc. used to the extent that they are used herein are intended to be taken to mean an approximation of, or approximation to, the numerical values of manufacturing and material tolerances inherent in the meanings mentioned, Accurate or absolute numbers are used to help prevent unauthorized exploitation by unauthorized intruders of the referenced disclosure.

1 is a view showing a circuit diagram of a heating element control unit having a uniform heating temperature of the present invention, Figures 2 to 4 are cross-sectional views showing various embodiments of the heating element according to the present invention, Figure 5 A plan view showing an embodiment of a heat generating layer and a conductive layer of a heat generating fabric according to the present invention.

The present invention relates to a heating element having a uniform heating temperature consisting of a power supply unit 100, a heating element 200, a control unit 300 for supplying power.

The power supply unit 100 may be configured to use a rechargeable battery or a disposable battery in order to supply power to the heating element to use the heating element in a portable manner.

A switch 100 for turning on / off the power of the power supply unit 100 may be configured separately.

As shown in FIG. 1, the control unit 300 includes a voltage adjusting unit 301 for adjusting a voltage supplied from the power supply unit 100, a voltage detecting unit 302 for detecting a voltage value of the power supply unit, a resistance detecting unit 305 for detecting a resistance value of the heating element 200. It is composed of an output control unit for controlling the output and the voltage control unit 304 and the voltage sensing unit 301, resistance detection unit 305, the micro-controller unit (MCU) 303 for controlling the output output control unit 304 to adjust the heat generation temperature of the heating element.

The voltage adjusting unit 301 adjusts the voltage supplied from the power supply unit 100 to match the circuit of the heating element to prevent overvoltage from being applied to each component of the control unit.

The voltage detecting unit 302 detects the voltage of the power supply unit 100. When the power supply unit is used as a rechargeable battery or a disposable battery, the voltage detection unit 302 detects that the voltage gradually decreases over time of use, and thus provides a current voltage to the microcontroller unit (MCU) 303. Pass negative voltage information.

The resistance detecting unit 305 senses a change in the resistance value of the heating element 200 and transfers the changed resistance value to the microcontroller unit (MCU) 303 of the current heating element resistance information.

The output output controller 304 adjusts the power supplied to the heating element of the microcontroller unit (MCU) 303 to adjust the heating temperature of the heating element.

The output control of the output output controller 304 may be controlled by pulse-width modulation (PWM) output control.

The output control calculates the power P through the voltage V and the resistance and adjusts the duty of the pulse-width modulation (PWM) to generate heat in a desired temperature range.

The pulse-width modulation (PWM) output control is a pulse control for supplying voltage by turning on or off, and controlling output voltage by changing a ratio of on time and off time.

The micro controller unit (MCU) 303 controls the voltage adjusting unit 304, the voltage sensing unit 301, the resistance sensing unit 305, and the output output control unit 304 to change the voltage and sense the resistance sensed by the voltage sensing unit 301. By monitoring the change in the resistance sensed in the branch 305 in real time to adjust the output output from the output output control unit 304 so that the heating fabric is heated to a uniform heating temperature.

LED module 306 for displaying the power state in the heat generating temperature uniform heating temperature of the present invention as described above may be further formed. The LED module 306 may be connected to the microcontroller unit to emit light of different colors depending on whether the power is on and the temperature state.

As shown in FIGS. 2 to 5, the exothermic fabric 200 includes a base layer 201 formed of synthetic fibers, regenerated fibers, or natural fibers, a conductive layer 204 through which current flows over the base layer, and top, bottom, or coplanar surfaces of the conductive layer. The heat generating layer 203 is partially or entirely formed in contact with the conductive layer in a line or plane, and the insulating layer 205 formed on the conductive layer and the heating layer.

The base layer 201 is microscopically very uneven in its surface, and there are extremely many fine pores due to the gap between the fibers. Therefore, in order to ensure the uniformity of the surface and to form a heat generating layer and / or a conductive layer to be described later with a uniform thickness, and to prevent the material forming the heat generating layer or the like from penetrating the back of the base layer 201, Primer layer 202 may be formed. However, the primer layer may be selectively formed on the fabric and may be excluded according to the characteristics of the fabric.

The primer layer 202 may be one or more selected from the group consisting of polyurethane resins, acrylic resins, silicone resins, and the like.

Meanwhile, the primer layer 202 according to the present invention may be formed of a single layer made of the above material, and may be formed in a multilayer structure together with a water repellent layer (not shown). The water repellent layer may be performed by a general water repellent process, and may be made of a fluorine or silicon material as a non-limiting example. When the water repellent layer is formed, the heat generating layer and / or the conductive layer may be formed on the surface and / or the rear surface. In this case, the resin component constituting the heating layer and / or the conductive layer has an advantage of preventing the phenomenon of seeping into the fabric in the manufacturing process.

The heating layer 203 may be formed on the primer layer 202. The heating layer 203 may be formed by applying a conductive material or a mixture of a conductive material and a binder in a predesigned form. The conductive material may be polyaniline, polypyrrole, polythiophene, or the like as a polymer, and the conductive carbon black may be It may be mixed. In addition, carbon, silver, gold, platinum, palladium, copper, aluminum, tin, iron and nickel may be one or more selected from the group consisting of.

2 illustrates an embodiment in which the conductive layer 204 is formed on the heating layer 203. The conductive layer 204 may be formed in a predetermined region on the upper or lower portion of the heating layer 203 formed in a predesigned form.

Meanwhile, FIG. 3 illustrates another embodiment in which the conductive layer 204 is formed on the same plane as the heating layer 203, and the conductive layer 204 may be formed in the same pattern as or different from the heating layer 203.

4 illustrates another embodiment in which the conductive layer 204 is formed under the heating layer 203.

The material constituting the conductive layer 204 may be a conductive polymer, a metal material such as carbon or silver, or a mixture of the material and a binder. Specifically, the conductive film is dispersed in a vehicle, and the cured film after printing is conductive. It refers to a material, which is commonly used for LCD electrode printing, touch screen printing, conduction pattern printing of circuit boards, contact portions and pattern portions printing of thin film switch plates, and electromagnetic shielding. The conductive filler is preferably silver based among conductive metals (silver, gold, platinum, palladium, copper, nickel, and the like).

The binder material of the conductive layer may be one or more selected from the group consisting of polyurethane resin, acrylic resin, silicone resin, melamine resin and epoxy resin.

On the other hand, the metal material and the binder is preferably mixed at a ratio of 90:10 to 80:20 (by weight), but the binder has a problem that the conduction function is lowered when the binder exceeds the above range and the adhesive force is lowered when the binder is below the above range. There is a disadvantage.

FIG. 5 illustrates an example in which a conductive layer and a heating layer are formed in a heat generating fabric. FIG. 5 illustrates an example in which a bent portion of a circuit pattern of the conductive layer 204 is formed in a relatively wider shape than a linear circuit. In FIG. 5, a circular shape is illustrated as the above shape, but the shape is not limited thereto, and if the shape is wider than the width of the linear circuit, other shapes such as a circle and an ellipse may be formed.

The thickness of the heat generating layer 203 and / or the conductive layer 204 is preferably 2 to 500 μm. If the thickness is less than the above range, it is difficult to ensure uniformity of the thickness of the conductive layer. This lowers the current value increases, and eventually there is a problem that the power consumption increases. In addition, the width of the conductive layer 204 is preferably about 10 to 20 mm. As the width of the conductive layer increases, the resistance value decreases, so that the current can be stably energized. There is a problem in coating properties. Meanwhile, the resistance value of the fabric according to the present invention is preferably maintained at 0.5 to 4 Ω before and after washing, and it is difficult to realize the above range, and there is a problem in that the current flows stably when exceeding the range.

In addition, it is preferable that the plurality of heating layers 203 be formed in an area of 4 to 8 cm 2. FIG. 5 illustrates an embodiment in which a plurality of heat generating layers 203 are in contact with a conductive layer 204. The heat generating fabric 200 formed as shown in FIG. 5 has an effect of suppressing overload.

An insulating layer 205 may be formed on the heating layer 203 and / or the conductive layer 204.

The insulating layer 205 is one or more selected from the group consisting of polyurethane resin, acrylic resin, silicone resin, polyester resin, PVC resin and polytetrafluoroethylene (PTFE) resin by coating, printing or laminating the insulating layer 205 Can be formed.

The insulating layer 205 prevents damages such as cracks in the conductive layer, imparts flexibility to the fabric, and performs waterproof or waterproof function.

The heat generating fabric according to the present invention as described above is capable of implementing a heat generating function while ensuring a variety of dynamic wearability is suitable for clothing.

In addition, the heating element of the present invention uses a voltage sensing unit, a resistance sensing unit in the control unit when the power supply is reduced in voltage over time or the resistance value is instantaneously changed due to wrinkles or folding of the heating element, the heating temperature is lowered It has the effect of preventing and having a uniform calorific value.

1 is a view showing a circuit configuration of a heating element control unit with a uniform heating temperature of the present invention.
2 to 4 are cross-sectional views showing various embodiments of the heat generating fabric according to the present invention.
5 is a plan view showing an embodiment of a heat generating layer and a conductive layer of a heat generating fabric according to the present invention.

Hereinafter, embodiments of the present invention will be described in detail. However, the present invention is not limited by the following examples.

Example

The exothermic fabric of the present invention is to form a primer layer of a solvent-type polyurethane resin on a fabric of polyester plain weave, and then first to form a conductive layer with a silver paste component on the primer layer, and a polypyrrole-based resin on the conductive layer The heat generating layer is formed by printing once. In this case, an acrylic crosslinking agent was used.

The heat generating layer was formed in plural with a width of 5 cm 2, the bending point shape of the conductive layer was formed in a circular pre-designed heating pattern. After the coating with a water-dispersible polyurethane composition to form an insulating layer in the cross-section to produce a heat generating fabric.

The control unit is composed of a voltage regulator, a voltage detector, a resistance detector, an output controller, and a microcontroller unit (MCU) with the circuit diagram of FIG. 1, and the output controller uses a PWM output control scheme.

◎ Power consumption measurement

After adjusting the power consumption to 6.3W in the heating element with a uniform heating temperature according to the present invention configured as described above, after changing the resistance value to 2.4 ~ 5Ω by crease or folding of the heating element, 5.8V, 6.1V, The power consumption of the heating fabric was measured by applying voltages of 7V, 7.4V, and 8V, and the results are shown in Table 1.

No resistance Item Contents One 2.4 Ω Voltage 5.8 V 6.1 V 7 V 7.4 V 8V electric current 2.41A 2.54A 2.91A 3.08A 3.33A power 14.02 W 15.5 W 20.42 W 22.82 W 26.67 W Duty 45.08% 42.34% 31.40% 28.27% 24.58% Power consumption 6.32 W 6.56 W 6.41 W 6.45 W 6.55 W 2 3Ω Voltage 5.8 V 6.1 V 7 V 7.4 V 8V electric current 1.93A 2.03A 2.33A 2.46A 2.66A power 11.21 W 12.4 W 16.33 W 18.25W 21.33W Duty 56.09% 53.34% 38.92% 35.86% 30.21% Power consumption 6.28 W 6.61 W 6.35 W 6.54 W 6.44 W 3 4Ω Voltage 5.8 V 6.1 V 7 V 7.4 V 8V electric current 1.45A 1.52A 1.75A 1.85A 2A power 8.41 W 9.3 W 12.25W 13.69 W 16 W Duty 78.08% 67.81% 53.69% 47.81% 39.45% Power consumption 6.56 W 6.30 W 6.57 W 6.54 W 6.31 W 4 5Ω Voltage 5.8 V 6.1 V 7 V 7.4 V 8V electric current 1.16A 1.22A 1.4A 1.48A 1.6A power 6.73 W 7.44 W 9.8 W 10.95 W 12.8W Duty 91.55% 85.42% 66.41% 59.93% 49.64% Power consumption 6.16 W 6.35 W 6.50 W 6.56 W 6.35 W

As shown in Table 1, the heat generating fabric according to the present invention shows that the power consumption is 6.1-6.6 W even though the resistance value is changed to 2.4 to 5 차이. The power consumption is 6.1 ~ 6.6W, so there is little difference in power consumption.

As can be seen from the above results, the heating element having a uniform heat generation temperature of the present invention can be seen that the heat generation is uniform even at a constant power consumption even when the resistance value is changed or the voltage is changed by wrinkles or folding.

<Description of Major Symbols in Drawing>
100: power supply unit 200: heat generating fabric
201: base layer 202: primer layer
203: heating layer 204: conductive layer
205: insulating layer 300: control unit
301: voltage control unit 302: voltage detection unit
303: microcontroller unit (MCU) 304: voltage regulator
305: resistance detection unit 400: switch

Claims (9)

A power supply unit for supplying power,
A base layer formed of synthetic fibers, regenerated fibers or natural fibers, a conductive layer through which current flows on top of the base layer, and a heat generating layer in which part or all of the conductive layer is in contact with the conductive layer in part or in whole on the top, bottom or the same plane of the conductive layer And a heat generating fabric formed of an insulating layer formed on the conductive layer and the heat generating layer,
Voltage regulator for adjusting the voltage supplied from the power supply unit, voltage detector for detecting the voltage value of the power supply unit, resistance detector for detecting the resistance value of the heating element, output control unit for adjusting the output and the voltage regulator, voltage detector The control unit is composed of a microcontroller unit (MCU) for controlling the resistance detection unit, the output output control unit,
The control unit is a heating element with a uniform heating temperature, characterized in that for controlling the output by sensing the voltage and the resistance value of the heating element of the power source. The method of claim 1,
Output control in the output control unit is a heating source with a uniform heating temperature, characterized in that controlled by PWM (Pulse-width modulation) output control. The method of claim 1,
And a primer layer formed between at least one of a polyurethane resin, an acrylic resin, and a silicone resin for the surface uniformity of the base layer between the base layer and the conductive layer. The method of claim 1,
The exothermic temperature is uniform heat generation fabric, characterized in that the primer layer is formed in a multi-layer structure with a water repellent layer. The method of claim 1,
The heating layer or the conductive layer is formed of a conductive material or a mixture of a conductive material and a binder. The conductive material is polyaniline, polypyrrole, polythiophene, carbon, silver, gold, platinum, palladium, copper, At least one selected from the group consisting of aluminum, tin, iron and nickel, the binder is an exothermic temperature, characterized in that at least one selected from the group consisting of polyurethane resins, acrylic resins, silicone resins, melamine resins and epoxy resins Uniform heating material. The method of claim 1,
The insulating layer is formed by coating, printing or laminating at least one selected from the group consisting of a polyurethane resin, an acrylic resin, a silicone resin, a polyester resin, a PVC resin, and a polytetrafluoroethylene (PTFE) resin. Heat-generating fabric with a uniform heating temperature. The method of claim 1,
The heat generating layer is a heat generating material having a uniform heating temperature, characterized in that the plurality is formed with a width of 4 ~ 8 ㎠. The method of claim 1,
When the bent portion is formed in the conductive layer is a heating element having a uniform heating temperature, characterized in that formed in a relatively wider form than a linear circuit. The method of claim 1,
Heat generating fabric with a uniform heating temperature, characterized in that the LED module for displaying the power state is further formed in the heating fabric.

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