KR101545699B1 - Pad against the cold using Heating thread - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a heat generating yarn and a warm pad using the heat generating yarn, and more particularly to a heat generating yarn used for a slim warming pad which is slim and freely bendable, This is about a cold pad applied with a brush.
According to the present invention, since the copper wire is spirally wound around the fiber and the generated fine heat generating yarn is produced and applied, the heat generating yarn can be closely bundled, so that the heat generating yarn can be widened as a whole, And a heating pad connected thereto.

Description

[0001] The present invention relates to a heat-

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a heating pad, a heating pad using the same, and a heating pad connected thereto, and more particularly to a pad for warming which is slim and can be bent and folded freely It is not only satisfying the criteria of temperature heating and temperature distribution, which is the quality standard of the heating pad, but also satisfying the criterion of fire which is a problem of the carbon-based surface heating element, The present invention relates to a heat-resistant pad which can feel warmth even at a temperature of 20 degrees, develops a heat-generating pad maintaining a sustained heating time of 8 hours or more, and can be used for a functional cold- .

In addition, the present invention relates to a heating wire connecting board for connecting a heating wire and a power terminal for preventing defective connection portions even when bending or twisting occurs at a connecting portion by simplifying a terminal connecting structure when applied to a warming pad will be.

There are two types of heating lines used in conventional electric furnaces, electric mats, electric heating pads, and the like, and they can be divided into a single heating line and a double heating line.

The single core heating wire is a primary winding in one direction while keeping copper wire, nickel chrome wire or copper alloy wire as a conductor to the polyester yarn at a certain interval, and then winding the insulating layer on the outer surface of the conductor wound on the outer circumferential surface of the above- Is coated with an outer coat.

The double heating line is coated with a nylon, silicone or Teflon coating on the outer circumferential surface of the conductor which is primarily wound with the single-core heating wire as the basic structure, the copper or alloy wire is further secondary-wound on the outer circumferential surface of the inner covering, The outer surface of the secondary winding is covered with an outer covering to form an insulating layer of PVC or silicone.

In addition, when one end of the primary winding is connected to the other end of the secondary winding, the current direction is reversed so that it can be used as a non-magnetic heating wire (heat wire not generating a magnetic field). Such a conventional heating wire is disadvantageous in that the thickness of the heating wire is thickened by winding the conductor on the core wire and the outer surface thereof and forming the insulating layer on the outer surface of the conductor again.

As the thickness of the heating wire is increased, when the electric wire is stored when the electric wire is stored, there is a problem that the heating wire that is wired inside is short-circuited and short-circuited. When the heating wire used in the industrial field is used, There is a problem that the thickness of the pad is increased due to the thickness of the heating wire when it is applied to the gloves for winter, winter gloves, etc. In particular, when a pad having a heating line is applied to a person who is engaged in active activities such as a soldier, There is a problem that disconnection occurs in the heating line as well as dullness.

Looking at the prior art in this field,

The electromagnetic wave removing device of the heat insulating electric furnace of the Korean Patent Registration No. 10-0341280 (hereinafter referred to as "Prior Art 1") has a structure in which an electromagnetic wave absorbing conductor is connected to the upper and lower sides of the heating body 40 by a connection circuit, And the inner layer conductor 43 is wound on the electrically insulating glass base core support 46. The outer layer conductor 44 is then wound on the intermediate electrical insulating layer 47 The inner layer conductor 43 and the outer layer conductor 44 are connected to each other at the wire connection part 45 at the outer end so that the helical direction of the helical wires 43 and 44 are opposite in phase with respect to the current direction, And the electric insulation layer 48 is covered on the outer surface of the outer layer conductor 44. The grounding electromagnetic wave absorbing conductor 31 and the leakage magnetic field attenuation for bypassing the electric field in the electric room The spiral inner layer conductor 43 and Layer conductive wire 43 and the outer layer conductive wire 44 are provided with a copper wire of about 0.23 mm in diameter and enamel-coated and simultaneously provided with a layer conductor 44. The inner layer conductor 43 and the outer layer conductor 43 44) is arranged densely in the vicinity of 1 mm (see Fig. 1).

In the prior art 1, the inner layer conductor 43 is wound on the support 46, the outer electrical conductor 47 is coated on the outer surface of the core 4m, the outer layer conductor is wound on the outer surface thereof, So that the heat generating element 40 is formed. As described above, the prior art 1 has a configuration in which an insulator is coated on its outer surface after each of the wires is wound, and the thickness of the heating element becomes large even if a thin conductor is used. There is a problem that the heating element of the folded portion is broken when the electric furnace is folded and stored.

The coded heater of Japanese Unexamined Patent Publication No. 2008-311111 (hereinafter referred to as "Prior Art 2") has an outer periphery of a core wire 2 made of an aramid fiber (aramid fiber) having an outer diameter of about 0.2 mm A heating wire 3 is wound in a screw shape at a pitch of 1 mm to constitute a heating core 4 and polyethylene is coated on the outer periphery of the heating wire 3 to form a casing. Here, the heating wire 3 is formed by mixing seven pieces of a conductor wire 3a made of a tin-copper alloy wire having a wire diameter of 0.08 mm and an insulating coating 3b made of polyurethane at a thickness of about 0.04 mm A heating element was started.

That is, in the prior art 2, a plurality of conductor wires are wound around the core wire so that even when a break occurs in a part of the heating wire, damage due to abnormal heat generation can be prevented. Accordingly, the prior art 2 has a problem in that it is not flexible because the 6-7 conductor wires are wound around the core wire, which may interfere with agile activities when applied to the weatherproof coating.

Prior art 2 has a problem that it is impossible to manufacture an electric pad by a method such as sewing or embroidery when a heating element is wired because a plurality of conductor wires are wound even if the conductor wire wound around the core wire is made thin.

Although not shown in the drawings of the present invention, the heat transfer chamber of Japanese Patent Application Laid-Open Publication No. 2002-313543 and the heater using the heat transfer chamber are also formed by winding thin wires and composite fine wires, covering the reinforcing core material on the outer surfaces thereof, An insulating layer is formed on the outer surface of the core material to form a heat transfer chamber. The structure of the heat transfer chamber is composed of a fine wire, a complex fine wire, an interpolation core, a first insulating layer and a second insulating layer. And the insulating layer composed of the first insulating layer and the second insulating layer is formed on the outer surface thereof, even if the heat transfer chamber is made of fine wires, there is a problem that the flexibility is deteriorated due to the basic thickness of the superposed layer of the reinforcing core and the insulating layer.

Therefore, when the heating wire is applied to a thin pad, a functional cold-rolled or the like, the prior arts 1 and 2 have a problem that bending or bending is generated, and short-circuiting, short-circuiting, and contact failure occur.

Also, in the case of a conventional planar heating element, conductive carbon fiber yarns are woven to form a heat generating surface, and the upper and lower surfaces are covered with a synthetic resin.

The surface heating elements are manufactured in a woven type or a film type, and can be mass-produced, and the heat generating area is wide, which is advantageous in that the heat efficiency is excellent.

However, since the surface heating element has a constant resistance distribution and is difficult to contact with the power line, it needs to be used by squeezing between the heating element and the wiring. Therefore, the applicable product can be used for the fixed body such as the spindle or the ondol panel. In many of these products, there is a disadvantage in that there is a high risk of fire due to sparks due to contact resistance on the connection part.

Korean Patent Publication No. 10-0341280 Japanese Patent Application Laid-Open No. 2008-311111

SUMMARY OF THE INVENTION The present invention has been proposed in order to solve the problems of the conventional art described above. In constituting a heating yarn, an electric insulator is coated on the outer surface of a heating wire made of a conductor and wound around the center fiber to form a heating yarn. Is intended to provide a heat generating yarn which is formed to have a thickness of 0.5 mm or less and which is not covered with a separate insulator for forming an insulating layer on its outer surface,

In addition, it is an object of the present invention to provide a heating pad and an electric pad which can be applied to an electric pad or a weatherproof coating by making heating wires in a form of sewing or embroidery using a heating yarn of 0.5 mm or less when the electric pad is manufactured have.

In addition, the present invention has an object to provide a heat-generating yarn having flexibility without damaging its function even if bending or bending occurs when it is applied to the coating of a functional warm-weather cloth or the like.

Another object of the present invention is to provide a heat sink connecting board capable of preventing defects such as damages on connecting portions when applied to electric pads, electric wires, and electric mats and stably fixing connecting portions of heating wires. .

In order to achieve the above-mentioned object, the present invention provides a heat generating yarn having a thickness of 0.5 mm or less in the total diameter of a heat generating yarn without forming a separate insulating layer on the outer surface of the heat generating yarn, A heat-generating yarn is formed so as to be able to be wired in a shape.

The heat sink includes a plurality of center fibers (310) for a tubular shape; And the outer surface of the center fiber 310 is wound around a first heating line 320 coated with an insulator 420 on the inner side of the metallic core 410 to form a heating yarn.

The metallic core 410 is formed of a metallic core 410 formed by rolling or a metallic core 510 formed by rolling so as to determine the rolling according to a resistance value and then the metallic core 410 is cured with an insulator 420 on the external surface, ).

In addition, the heating wire is wound with a fixed wire 620 made of a metallic material or a fiber material so that the heating wire is fixed in a direction opposite to the winding direction of the heating wire 320 wound around the center fiber.

As another embodiment of the present invention, the nonwoven fabric 731 in which the above-described heat-generating yarns are arranged at predetermined intervals by the embroidery method; A heating plate 730 to which the nonwoven fabric 731 is attached and to which a power connection cord 750 connected to the ends of the heating yarns 300 and 600 is connected; An insulating plate 720 for preventing the heat of the heating plate 730 from being discharged; A second cover plate 740 covering the upper end of the heating plate 730; And a first cover plate (710) covering the lower end of the heat insulating plate (720) and fused to the second cover plate (740) by high frequency welding or heat welding. to provide.

At least one or more of jade, charcoal, and elvan powder may be applied to the upper surface of the heating plate 730.

In another embodiment of the present invention, a heat sink fixing plate 940 is formed by cutting a part of the heat sink connecting board 900 so as to be symmetrical to each other and fixing the heat sink yarns 300 and 600 to a lower portion thereof, and; A fixing hole 920 formed at both ends of the heating jig fixing plate 940 and having a bent portion of the heating yarns 300 and 600 inserted and fixed; A finger insertion hole 910 formed by cutting a part of the connection board 900 and a part of the fixing plate 940 so that the heating wire fixing plate 940 can be easily lifted using a finger; And a fastening hole 930 for connecting the cold pad and the heat sink connecting board 900 in a bolt manner and the heat sink connecting board 900 is formed of a flexible printed circuit board .

According to the present invention, since the copper foil is spirally wound around the fiber to generate and apply the generated fine heating yarn, the heating yarn can be closely bundled, so that it can be applied to functional clothes without increasing the volume as a whole.

Another advantage of the present invention is that the copper wire is spirally wound around the fiber to form a fine heat sink like a yarn, so that it can be applied to a functional garment or the like because it maintains a normal function even at a sudden bending or bending.

Another effect of the present invention is that the connection is easy since the connection structure between the heating wire and the power line is interposed therebetween.

FIGS. 1A and 1B are views showing the structure of a heating wire according to the related art.
2 is a view showing the structure of a planar heating element according to the prior art.
FIG. 3 is a view showing a structure of a heat-generating yarn 300 according to an embodiment of the present invention.
FIG. 4 is a view showing the structure of the heating line 320 of the heating yarn 300 shown in FIG.
5 is a view showing another structure of the heating line 320 among the heating yarns 300 shown in FIG.
FIG. 6 is a view showing a structure of a heat generating yarn 600 according to another embodiment of the present invention.
FIG. 7 is a perspective view illustrating a structure of a warm pad 700 to which a heating yarn 300 according to an embodiment of the present invention is applied.
FIG. 8 is a graph 810 showing the environment 800 of the bending and folding test for the warming pad 700 shown in FIG. 7 and the test results therefrom.
9 is a perspective view of a heating wire connecting substrate 900 connecting a heating wire (300 in FIG. 3) and a power line according to an embodiment of the present invention.
10 is a view showing an example of fastening a power supply line 1010 and a heat generating yarn 300 using a heat sink connecting board 900 according to another embodiment of the present invention.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

Like reference numerals are used for similar elements in describing each drawing.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component. The term "and / or" includes any combination of a plurality of related listed items or any of a plurality of related listed items.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the meaning in the context of the relevant art and are to be construed as ideal or overly formal in meaning unless explicitly defined in the present application Should not.

Hereinafter, a heating yarn according to an embodiment of the present invention and a cooling pad using the heating yarn will be described in detail with reference to the accompanying drawings.

FIG. 3 is a view showing a structure of a heat-generating yarn 300 according to an embodiment of the present invention. Referring to FIG. 3, the heat generating yarn 300 includes a center fiber 310 having a tube shape and a heating line 320 spirally winding the center fiber 310.

The heat generating yarn 300 has a structure in which a metal such as copper or copper alloy is spirally twisted on a fiber (yarn) and has no insulating layer (coating) on the outside. Of course, since the heating wire 320 itself has an insulating part 420 to be insulated, it is not separately isolated outside the heating yarn 300 (see FIG. 3). The overall diameter thickness of the heat-generating yarn 300 is less than the thickness including 0.5 mm.

FIG. 4 is a view showing a partially enlarged structure of the heating line 320 in the structure of the heating yarn 300 shown in FIG. 4, the heating wire 320 is composed of an inner metallic core 410 and an insulator 420 covering the inner metallic core 410. [

The inner circumferential surface of the metallic core 410 is coated with an insulating resin (nylon, enamel, or the like) in this state, and the flame resistance (Such as an aramid yarn) having a yarn endless yarn.

The heating wire 320 wound around the center fiber 310 (FIG. 3) is coated with a coating, and it can withstand a temperature of about 150 to 200 ° C even when short-circuited.

In particular, the metallic core 410 shown in FIG. 4 is not rolled, and copper is mainly used. If a heating yarn made of copper is used, the resistance value of the copper varies depending on the temperature. The copper resistance temperature coefficient is about 0.004 Ω / ° C, which is a large change in products using direct current (DC) power. For example, copper at 10 Ω at room temperature (20 ° C) becomes about 12 Ω at 70 ° C. When the temperature rises, the temperature is stabilized after a certain period of time because the heating yarn using the copper rising in resistance is used, and the consumption current is also gradually reduced.

In other words, the temperature is rising sharply in the early days, and the rise is gradually reduced, and it is finally stabilized. This feature not only reduces battery consumption, but also allows the heating plate to actively increase and reduce the amount of current in response to ambient temperature.

Specifically, the heating wire of the present invention uses copper rather than an alloy. The copper has a characteristic that the resistance value changes with temperature. The temperature coefficient of motion is about 0.004 Ω / ° C, which is a large change in products using DC 7.4V.

For example, copper at 10 Ω at room temperature of 20 ° C becomes about 12 Ω at 70 ° C. When the temperature rises, the temperature is stabilized after a certain period of time by using the heating wire using the copper having the increased resistance. When the temperature is stabilized against the initial consumption current, the consumption current is reduced by about 100 mA or more. At this time, the power consumption is reduced by about 1W or more. In other words, the temperature is rising sharply in the early days, and the rise is gradually reduced, and it is finally stabilized.

This feature not only reduces battery consumption, but also allows the heating plate to actively increase and reduce the amount of current in response to ambient temperature.

5 is a view showing another structure of the heating wire 320 among the heating yarns 300 shown in FIG. 3, that is, the metallic core 410 uses a rolled copper wire. Of course, similar to Fig. 4, the metallic core 410 is covered and covered by the insulating portion 520. Fig.

The temperature table of the current change amount according to the temperature of the heating yarn of the present invention is shown in Table 1 below.

As can be seen from the above table, the amount of current change with time is constantly maintained at 0.62 mA from 15 minutes, and the resistance change with time is 11.94? From 15 minutes, and gradually changes from then on .

That is, as can be seen from Table 1, it can be seen that the temperature of the resistance core is different according to the degree of rolling of the metallic core 510 of the heating wire constituting the heating yarn of the present invention.

For example, if the temperature is 0 ° and the electrical resistance is R ₀ , the electrical resistance R at the temperature t is as follows.

Can be calculated by the formula R = R ₀ (1 + at).

a is the resistance temperature coefficient.

Therefore, the resistance value varies depending on the degree of rolling of the metallic core 510 of the present invention.

Water temperature The resistance value can be arbitrarily set according to the kind of the warm pad to be made.

6 is a view showing a structure of a heat generating yarn 600 according to another embodiment of the present invention. 6, the heat generating yarn 600 includes a core fiber 310 having a tube shape, a heating wire 320 spirally winding the center fiber 310, and a heating wire 320 wound in a direction opposite to the winding direction of the heating wire 320 The winding is constituted by a fixing yarn 620 made of a metallic material or a fiber material.

Generally, when an alternating current flows in the heating line, an electric flux line intersecting the magnetic flux generated around the heating line is generated. That is, when electric current flows through the conductor, electromagnetic waves are generated by electric and magnetic waves flowing in the electric current.

This electromagnetic wave is a phenomenon in which the vibration of energy is transmitted at a constant speed at a point within an electromagnetic field of an electric property and a magnetic property, and is measured in mG (milligauss), which is a measurement unit of an electric field (EMF: ELECTRO MAGNETIC FIELD) , And such electromagnetic waves may be referred to as EMW or EMF (Electro Magnetics Field). Such electromagnetic waves are harmful to human health.

Therefore, the fixing wire 620 is wound around the heating wire 320 in a staggered manner to achieve a zero magnetic flux. As the material of the fixing yarn 620, rolled copper and / or un-rolled copper may be used.

It is a common technology to achieve a zero winding according to the winding of the heating wire. In the present invention, the fixing yarn can be achieved by using the fixing yarn as the base material, but the fixing yarn 620 is not made of metal, .

In this case, the stationary yarn 620 serves to stably fix the interval of the heating wire 320.

That is, according to the present invention, the heat generating yarn is not insulated on the outer circumferential surface at the time of manufacturing, but the insulator is formed on the heating wire itself wound on the outer surface of the center fiber, and then the heating wire is wound and fixed with the fixing yarn 620. In other words, the center fiber and the insulator are prevented from flowing during contact.

Therefore, when such heat-releasing yarns 300 and 600 are used, the insulator coated on the metal flows during soldering or there is no deformation of the insulating resin.

In addition, sewing or embroidery can be performed by using a machine, and mass production can be performed using the machine, thereby reducing the cost of the product.

In addition, due to the characteristics of aramid yarn, it has no shrinkage-like length at high temperature, has excellent heat resistance (about 427 ° C), excellent cutting resistance, and has tensile strength as strong as 5 times of iron, And the progressive failure rate can be lowered.

In addition, when the product is reduced in outer diameter, it is possible to arrange the intervals densely without feeling a foreign object, thereby increasing the thermal efficiency.

In addition, since the thickness of the heat-generating yarn 300 is 0.5 mm or less, the arrangement of heat-generating yarns according to the present invention can be arranged at intervals of about 1.0 mm. Therefore, the present invention can be applied not only to a wide heat generating area but also to a functional dress requiring some flexibility such as folding and bending, and some pads.

FIG. 7 is a perspective view illustrating a structure of a warm pad 700 to which a heating yarn 300 according to an embodiment of the present invention is applied. Referring to FIG. 7, a heat-resistant pad 700 is shown as an embodiment to which the heat-generating yarn 300 shown in FIGS. 3 to 6 is applied.

The heat-resistant pad 700 includes a nonwoven fabric 731 in which heat-generating yarns 300 and 600 are arranged at predetermined intervals by an embroidery method; A heating plate 730 to which the nonwoven fabric 731 is attached and to which a power connection cord 750 connected to the ends of the heating yarns 300 and 600 is connected; An insulating plate 720 for preventing the heat of the heating plate 730 from being discharged; A second cover plate 740 covering the upper end of the heating plate 730; And a first cover plate 710 covering the lower end of the heat insulating plate 720 and fused with the second cover plate 740 by high frequency welding or heat welding.

7, the warming pad 700 includes a first cover 710, a heat insulating plate 720, a heat generating plate 730, a nonwoven fabric 731, and a second cover plate 740, which are five layers.

The double heat generating plate 730 is formed by arranging heat generating yarns 300 and 600 in a nonwoven fabric 731 of about 0.5 T in an embroidery manner. The top plate of the heat generating plate 730 may be coated with jade, charcoal, elvan powder or the like for far-infrared radiation.

Since the heating yarns 300 and 600 have a thickness of less than 0.5 mm, they can be arranged at a distance of at least 1 mm from the nonwoven fabric 731, so that the heat generating area can be widened and the thermal efficiency can be increased. The heating yarns 300 and 600 may be arranged inside the nonwoven fabric 731 but the present invention is not limited thereto and the heating yarns 300 and 600 may be arranged on the surface of the nonwoven fabric 731 as shown in a right- It is also possible.

Further, the copper wires of the heat sink yarns (300, 600) can be soldered directly, so that they are not required to be compressed and have sufficient durability even for products requiring flexibility using the above connection structure. Further, since the thickness of the heat-generating yarns 300 and 600 is thin, the foreign sensation of the heat-generating yarns 300 and 600 is hardly sensed.

The insulation layer 720 is formed by sealing low-density poly-ethylene (LDPE) with polyvinyl chloride (PVC) or polyurethane to prevent outflow of heat generated from the outside and / or cooling / Thereby preventing the inflow of foreign matter.

The first cover plate 710 and the second cover plate 740 are coupled to the heat insulating layer 720 and the heat generating plate 730, respectively.

For safety, an environmentally friendly non-toxic flame-retardant adhesive is applied between each layer to fix each layer firmly. In addition, since the high-frequency fusion bonding or the heat fusion bonding technique is finally applied to each layer and rejoined, the warm-up pad 700 has a waterproof characteristic.

Further, the heat generating plate 730 is also sealed to separate the heat generating layer from the heat insulating layer. Therefore, since the air layer (serving as the best heat insulating material) in a stopped state is formed between the heat insulating plate 720 and the heat generating plate 730, the heat insulating effect is further improved.

Power lines supplying power to the heating yarns 300,600 can be either terminals (i.e., connectors) or cords, which are soldered directly to a connection structure (typically a printed circuit board (PCB)). The heating yarns 300, 600 used in the heating plate 730 are soldered to the above connection structure, which is again connected to the power line. 9 and 10, which will be described later.

A battery is used as a supply means for supplying power to the power line. In addition, the total thickness of the cold pad 700 according to the present invention is 4 to 4.5 mm, and therefore, it has flexibility and durability sufficient for folding and the like. This flexibility improves the adhesion to the human body, thereby achieving excellent thermal conductivity.

In addition, it has a self-insulating layer, which reduces heat loss and can be used in extreme environments.

FIG. 8 is a graph 810 showing the environment 800 of the bending and folding test for the warming pad 700 shown in FIG. 7 and the test results therefrom. Further, it is a graph showing test results for demonstrating safety through current change.

Of course, the following test environment (800) should be prepared for this test.

1. The temperature of the temperature chamber (not shown) is maintained at 15 ° C to 20 ° C by the safety standards for electrical appliances.

2. Insulating sheet 820 of the standard specified in the electrical appliance safety standard is placed on the lower surface of the warming pad 700.

3. Fold the heat-resistant pad (700) as a sample on the heat-insulating sheet (820) by folding it in half, and place the heat-conducting pad between the folded surfaces. Here, a temperature sensing sensor (not shown) is attached to the heat conduction band (65mm x 65mm).

4. Cover the bedding (fiber) of about 5T on the top and raise the weight (65mm x 65mm x 10mm). The weight of the weights is 300g each, with two on each side and a total of four.

5. Using a DC power supply, measure the temperature by applying 7.4V.

The temperature conditions are as follows.

1. Surface temperature reaches 50 ± 5 ℃ within 5 minutes

2. Maintain for 8 hours at high (battery capacity 40W)

Here, the available capacity of the battery chamber is about 90%, which is 36W / h when calculated, and about 4.5W per hour when it is maintained for 8 hours.

The test results are calculated as a graph 810 by the test environment 800. The results of this graph (810) are shown in Table 1 below.

Elapsed time
Heat plate structure 0 minutes
5 minutes
30 minutes
1 hours
2 hours
2 hours and 20 minutes
Cold weather pads 17.9 ° C
55.3 DEG C
112.1 DEG C
121.5 ℃
123.8 ℃
124.3 DEG C

Here, the ambient temperature is 17 占 폚.

In addition, when the pad is normally used, the pad is stabilized at about 100 ° C, whereas when it is folded in half, it is stabilized at about 125 ° C. At this time, consumption current is about 0.56mA and power consumption is about 4.1W. Therefore, the cold pad according to the present invention can be used regardless of the result of short circuit, leakage, poor contact or the like even when it is folded or bent.

Of course, various tests are performed in an extreme environment (i.e., room temperature, cold temperature, etc.), but further explanation will be omitted for a clear understanding of the present invention.

9 is a perspective view of a heating wire connecting substrate 900 connecting a heating wire (300 in FIG. 3 or 600 in FIG. 6) and a power line according to an embodiment of the present invention. 9, the heating wire connecting board 900 is a connecting means for connecting the heating wire and the power source, and the heating wire connecting board 900 is formed as a pair in which a part of the heating wire connecting board 900 is cut out to be symmetrical to each other, Thereby forming a heating jig fixing plate 940 to which the heating yarns 300 and 600 are fixed. At this time, the shape of the notch of the heat sink connecting board 900 is formed in a semicircular or "C" shape.

A fixing hole 920 is formed at both ends of the fixing jig 940 to fix the bent portions of the heating yarns 300 and 600.

A finger insertion hole 910 is formed in a part of the connection board 900 and a part of the fixing plate 940 at a cut-out portion so that the heating wire fixing plate 940 can be easily lifted with a finger.

Also, a fastening hole 930 for connecting the heat-resistant pad and the heat sink connection board 900 in a bolt manner is formed.

The heating wire connecting substrate 900 is formed of a flexible printed circuit board.

In general, the surface heating element is manufactured in a woven form or a film form, has a constant resistance distribution, and is difficult to contact with a power source line, so that the heating element and the wiring are pressed and used. Therefore, the contact resistance is generated on the connection portion, which increases the risk of fire due to spark. Also, in the case of a linear hot wire, defects (short circuit, broken wire, fire due to poor contact, etc.) frequently occur due to bending or twisting at the area where the soldered terminals are connected.

However, as shown in FIG. 7, the connection structure of the heat sink connecting board 900 of the present invention is such that the heat sink is fixed by lifting the PCB along the cut surface and sandwiching the heating line, . In addition, since the heat sink connecting board 900 is embedded not in the exterior, it is more firmly fixed by the upper and lower plates of the cover or the like.

The heat sink connecting board 900 has a cross-sectional structure in which a pattern exists on the lower side and a cord or terminal for connection is attached on the upper side.

In addition, the finger insertion slot 910 is a portion that can be lifted by a finger, and may or may not be perforated depending on the size of the connection structure or the size of the flexible PCB (FPCB).

If it is not punched, grasp the edges of the left and right sides and pivot slightly to insert the heating yarn (300 in Fig. 3 and 600 in Fig. 6).

The fixing hole 920 is a hole to which a heating yarn fitted along the cut surface is fixed. It is possible to reduce the degree of bending of the heating element by adjusting the size, and the size of the heating element should be 1.5 to 2 times the thickness.

The method of fixing the heat sink connecting substrate 900 to the heating plate (730 in Fig. 7) can be fastened by sewing or bolt-fitting using the fastening holes 930.

10 is a view showing an example in which a power supply line 1010 and a heat generating yarn 300 are fastened to each other using a heat sink connecting board 900 as another embodiment.

In the present invention, the heating pad is formed as a thin line so that the heating pad is wired as an embroidery wire or the pad is enumerated by a normal wiring method when the heating pad is manufactured. The used pads are used for army gloves, winter clothes, socks and the like which are used by soldiers. In addition, they can be applied as a winter pad for various products such as winter coat, gloves, heat sheet and sole.

300,600: Heating yarn 310: Center fiber
320: heating line 410, 510: metallic core
420, 520: Insulator 620:
700: cold weather pad 710: first cover plate
740: second cover plate 720:
730: Heating plate 731: Nonwoven fabric
750: Power connection code 900: Heating wire connection board
910: Finger insertion hole 920: Fixing hole
930: fastening hole 940: fastening plate

Claims (5)

delete delete delete delete A nonwoven fabric 731 in which heating lines are arranged at predetermined intervals; A heating plate 730 to which the nonwoven fabric 731 is attached and to which a power connection cord 750 connected to the end of the heating line is connected by a connection means; An insulating plate 720 for preventing the heat of the heating plate 730 from being discharged; A second cover plate 740 covering the upper end of the heating plate 730; And a cold pad 700 covering the lower end of the heat insulating plate 720 and fused to the second cover plate 740 by high frequency welding or heat welding.
The heating yarns arranged in the nonwoven fabric 731 are formed by rolling the metallic core 510 and then coating the metallic core 510 with the insulator 520 to form the heating wires 320 and 620. The heating fibers 320 and 620 form the center fiber 310 And the heating yarns 300 and 600 are formed to have a total thickness of 0.5 mm or less without forming a separate insulating layer on the outer circumferential surface of the heating yarns 300 and 600 In addition,
The heat-resistant yarn (300, 600) is a heat-resistant pad using a heating yarn wired to a nonwoven fabric (731) at a distance of at least 1 mm between a heating yarn and a heating yarn in a state that no separate insulating layer is formed on the outside,
The heating yarns 300 and 600 wired to the nonwoven fabric at a distance of at least 1 mm between the heating yarn and the heating yarn are fixed to the heating yarn connecting board 900 provided at one side and connected to the power connecting cord 750, However,
The heat sink connecting board 900 is formed by cutting a part of the heat sink connecting board 900 such that the heat sink connecting board 900 is symmetrical with respect to the heat sink connecting board 900 and includes a heat sink fixing plate 940 to which the heat sink 300 is fixed.
A fixing hole 920 formed at both ends of the heating jig fixing plate 940 and inserted and fixed to the bent portions of the heating yarns 300 and 600;
A finger insertion hole 910 formed by cutting a part of the connection board 900 and a part of the fixing plate 940 so that the heating wire fixing plate 940 can be easily lifted using a finger,
A coupling hole 930 for connecting the cold pad and the heat sink connection board 900 in a bolt manner;
The heating wire connecting board 900 is formed as a flexible printed circuit board and connected to a power connecting cord 750 at one side to be connected to a heating wire wired to the nonwoven fabric and then connected to a heating board 730 Wherein the pads are made of a heat-resistant yarn.

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