WO2018155838A1

WO2018155838A1 - Hot wire pattern structure and planar heating element comprising same

Info

Publication number: WO2018155838A1
Application number: PCT/KR2018/001494
Authority: WO
Inventors: 송미선; 김동한; 권유석
Original assignee: 엘지전자 주식회사
Priority date: 2017-02-21
Filing date: 2018-02-05
Publication date: 2018-08-30
Also published as: KR20180096413A; KR102001294B1

Abstract

A hot wire pattern structure for a planar heating element, according to one embodiment of the present invention, comprises: a first end part and a second end part respectively positioned on a starting end part and a terminating end part with respect to a flow of a current; extension parts connected with the first end part and the second end part, and extending in one direction or the other direction; and turn parts connected with the extension parts so as to change the progressing directions of the extension parts, wherein a plurality of the turn parts and the extension parts are alternately connected, and the gap between a turn part and an extension part that are adjacent to each other is formed so as to be larger than the gap between an extension part and another extension part that are adjacent to each other.

Description

Hot wire pattern structure and planar heating element including the same

The present invention relates to a hot wire pattern structure and a planar heating element, and more particularly, the hot wire increases the thickness of the turn portion in which the traveling direction is changed, and increases the interval between the hot wire having a large potential difference and the adjacent hot wire to insulate by local heating. The present invention relates to a hot wire pattern structure and a planar heating element capable of preventing breakage and hot wire breakage.

In general, the surface heating element is easy to control the temperature by using the radiant heat generated by the electric current, it does not pollute the air has advantages in terms of hygiene and noise has been used in various beddings such as heating mats and pads.

In addition, the planar heating element is a heating device of various industrial sites, such as floor heating of houses, industrial heating of offices and workplaces, painting and drying, vinyl house or barn, agricultural equipment, automotive back-miller, freeze protection of parking lot, equipment for winterization for leisure, It is widely used in home appliances.

On the other hand, in the case of a planar heating element that generates heat at a high temperature, there is a problem in that the local portion is generated as the pattern is formed and thus the hot wire is destroyed.

That is, a path difference in which current flows according to an angle rotated by the pattern shape is generated, and a large difference in current density occurs when the path difference is large. In addition, local heating occurs in the high current density line, which causes the heating wire to be destroyed.

In addition, the planar heating element according to the prior art has a capacitance reactance resistance between the heating wire and the heating wire when using the AC power, and the capacity reactance decreases as the dielectric constant of the base material increases at a high temperature to support the problem that the dielectric breakdown phenomenon occurs have.

In addition, the high-temperature planar heating element according to the prior art has a problem that a short circuit of the hot wire is generated, the current leaks to the back of the substrate.

SUMMARY OF THE INVENTION An object of the present invention is to provide a hot wire pattern structure of a planar heating element that can prevent hot wire breakage due to local heating of a hot wire pattern by forming a hot wire pattern such that current density becomes uniform.

Another object of the present invention is to provide a hot wire pattern structure of a planar heating element which can prevent the reactance from being rapidly reduced by increasing the gap of a region having a large potential difference in the hot wire pattern structure, thereby preventing the dielectric breakdown phenomenon. It is for.

Another object of the present invention is to provide a planar heating element that prevents short-circuit current of the hot wire pattern during high-power driving, and blocks the current from leaking to the back of the substrate.

The objects of the present invention are not limited to the above-mentioned objects, and other objects and advantages of the present invention, which are not mentioned above, can be understood by the following description, and more clearly by the embodiments of the present invention. Also, it will be readily appreciated that the objects and advantages of the present invention may be realized by the means and combinations thereof indicated in the claims.

In the present invention, the extension portion extending in one direction or the other direction, and the turn portion for switching the traveling direction of the extension portion, the thickness of the turn portion is formed larger than the thickness of the extension portion. Therefore, in the present invention, the current density of the turn portion and the extension portion is uniform, and local heat generation and hot wire breakage can be prevented in advance.

In the present invention, a plurality of turn parts and extension parts are alternately connected, and a gap between an adjacent turn part and the extension part is formed larger than a gap between the adjacent extension part and another extension part. Therefore, in the present invention, the gap between the turn portion and the extension portion having a large potential difference is increased to prevent a sudden decrease in reactance and to prevent dielectric breakdown.

The present invention includes a base substrate, an insulating layer laminated on one surface of the base substrate, and a hot wire pattern formed to be laminated on one surface of the insulating layer. Therefore, the present invention can prevent the short-circuit current of the hot wire pattern by the insulating layer, and can block the current from leaking to the back of the substrate.

According to the present invention, it is possible to provide a hot wire pattern structure with a uniform current density. That is, as the current density becomes uniform, hot wire breakage due to local heating of the hot wire pattern can be prevented and a stable planar heating element can be obtained.

In addition, according to the present invention, it is possible to provide a hot wire pattern structure in which the reactance is not rapidly reduced. In other words, the sudden reduction of the reactance is prevented, and the dielectric breakdown phenomenon can be prevented beforehand, thereby improving the life of the planar heating element.

Further, according to the present invention, it is possible to obtain a planar heating element in which a short circuit of the hot wire pattern is prevented in the insulating layer and the leakage current is cut off.

That is, the lifespan is extended due to the prevention of short circuit current, and the safety can be improved by blocking the leakage current.

In addition to the effects described above, the specific effects of the present invention will be described together with the following description of specifics for carrying out the invention.

1 is a configuration diagram schematically showing a heat ray pattern structure for a planar heating element according to a first embodiment of the present invention.

FIG. 2 is a schematic A-A 'cross-sectional view of the hot wire pattern structure shown in FIG. 1.

3 is a configuration diagram schematically showing a heat ray pattern structure for a planar heating element according to a second embodiment of the present invention.

4 is a schematic cross-sectional view taken along line B-B 'of the hot wire pattern structure shown in FIG.

5 is a cross-sectional view schematically showing a planar heating element according to an embodiment of the present invention.

6 is a schematic cross-sectional view taken along line C-C 'of the planar heating element shown in FIG.

The terms or words used in this specification and claims are not to be construed as limiting in their usual or dictionary meanings, and the inventors may appropriately define the concept of terms in order to best describe their invention. Based on the principle that it can, it should be interpreted as meaning and concept corresponding to the technical idea of the present invention. In addition, the embodiments described in the specification and the drawings shown in the drawings are only one of the most preferred embodiments of the present invention, and do not represent all of the technical spirit of the present invention, it is possible to replace them at the time of the present application It should be understood that there may be various equivalents and variations in the range.

1 is a configuration diagram schematically showing a hot wire pattern structure for a planar heating element according to a first embodiment of the present invention, Figure 2 is a schematic A-A 'cross-sectional view of the hot wire pattern structure shown in FIG.

As shown, the hot wire pattern 100 includes a first end 110, a second end 120, a turn part 130, and an extension 140. In addition, the turn unit 130 and the extension unit 140 are connected to a plurality of alternation and form a circle as a whole.

More specifically, the first end 110 and the second end 120 are located at the start end and the end at the basis of the flow direction of electricity supplied to the heating wire pattern 100, respectively. In addition, the first end 110 and the second end 120 may be formed of a single line or a double line according to the size of the heating wire pattern, and FIG. 1 is a double line as an example thereof. It is shown.

The extension 140 is connected to the first end 110 and the second end 120, and is formed of an arc extending in a clockwise or counterclockwise direction so that the heating wire pattern 100 has a circular shape as a whole.

In addition, the turn part 130 is a direction change part of the extension part 140 and is positioned between the extension part extending in the clockwise direction and the extension part extending in the counterclockwise direction.

That is, the turn part 130 is connected to an extension part extending in one direction, and the other end is connected to an extension part extension extending in the other direction to change the traveling direction of the extension part.

In addition, the turn unit 130 may have a semicircular three-dimensional shape having an inner diameter and an outer diameter so as to change a direction in which the arc-shaped extension portion 140 extends as described above.

In addition, the width W1 of the extension part 140 is the same as the width W2 of the turn part 130.

That is, the widths of the extension parts and the turn parts connected alternately between the first end 110 and the second end 120 are the same.

The gap D1 between the adjacent extension part 140 and the extension part 140 is smaller than the gap D2 between the turn part 130 and the adjacent extension part 140.

This is to prevent the occurrence of dielectric breakdown by reducing the capacitance reactance due to the effect of increasing the dielectric constant of the base material at a high temperature when using an AC power source is generated between the heating wire and the heating wire.

That is, the gap D2 between the turn part 130 and the adjacent extension part 140, which are regions of large potential difference, is larger than the gap D1 between the extension part 140 and the extension portion 140, which are regions of small potential difference. Formation prevents breakdown.

In addition, the gap D1 between the extension part 140 and the extension part 140 adjacent to the turn part 130 may be formed between the extension part 140 and the extension part 140 spaced apart from the turn part 130. It may be formed smaller than the gap (D4).

For example, when the diameter of the hot wire pattern 100 is about 10 inches, and the output is 3300W or more, D2 may be designed to have 8mm or more.

In addition, when the diameter of the hot wire pattern 100 is about 8 inches, and the output is 2200W or more, D2 may be designed to have 6mm or more.

In addition, when the diameter of the heating wire pattern 100 is about 10 inches or about 8 inches, the turn portion 130 is formed by the extension 140 connected to the first end 110 and the second end 120 as a whole. It may be located at least one outside of the extending portion.

In addition, the gap D3 between the turn part 130 and the turn part 130 may have a larger gap D1 between the extension part 140.

In addition, as illustrated in FIG. 2, the thickness T1 of the turn part 130 is larger than the thickness T2 of the extension part 140. That is, the turn portion 130 and the extension portion 140 has the same width, the thickness T1 of the turn portion 130, which is the length in the thickness direction that is perpendicular to the extension direction, is the thickness T2 of the extension portion. Larger than that.

This is to reduce the current density and keep the current density of the heating wire pattern 100 uniform so that the heating wire is not destroyed due to local heating when the current density is increased in the turn unit 130 where the heating wire is rotated.

To this end, the turn unit 130 may be implemented in such a manner that only two areas of the turn unit 130 in the over-coat process are printed with the same material.

For example, when the heating wire of the planar heating element that generates heat above 500 ° C rotates 90 ° or more at a radius of 2Cm or less, the turn may be implemented by an over-coat process.

As described above, the planar heating element according to the exemplary embodiment of the present invention can prevent insulation breakdown occurring in a region having a large potential difference by reducing the capacitance reactance generated between the hot wire and the hot wire, and the current density is uniform. As it is formed so as to prevent thermal destruction by local heating.

3 is a configuration diagram schematically showing a heat ray pattern structure for a planar heating element according to a second embodiment of the present invention, and FIG. 4 is a schematic B-B 'cross-sectional view of the heat ray pattern structure shown in FIG. 3.

As illustrated, the hot wire pattern 200 of the planar heating element according to another embodiment has a different pattern only compared to the hot wire pattern 100 of the planar heating element shown in FIG. 1.

More specifically, the heating wire pattern 200 of the planar heating element includes a first end 210, a second end 220, a turn part 230, and an extension part 240, and a turn part 230 and an extension part. A plurality of 240 are connected alternately and form a circle as a whole.

In addition, detailed descriptions of the first end 210, the second end 220, the turn part 230, and the extension 240 may include the first end 110 and the second end of the heating wire pattern 100, according to an exemplary embodiment. The same as that of the end 120, the turn part 130, and the extension part 140, and the detailed description of the detailed description will be omitted, and the following description will be given based on differences and main technical features.

The first end 210 and the second end 220 are formed in a single line compared with the first end 110 and the second end 120 of the heating wire pattern 100 according to the exemplary embodiment shown in FIG. 1.

In addition, when the diameter of the hot wire pattern 200 is about 6 inches and the output is 1200W or more, D2 may be designed to have 4 mm or more.

In addition, the turn part 230 is positioned inside the extension part which is entirely formed by the extension part 240 connected to the first end 210 and the second end 220.

In addition, the gap D5 between the extension part 240 is smaller than the gap D6 between the turn part 230 and the adjacent extension part 140.

In addition, the gap D5 between the extension part 240 and the extension part 240 adjacent to the turn part 230 may be formed between the extension part 240 and the extension part 240 spaced apart from the turn part 230. It may be smaller than the gap D7.

As shown in FIG. 4, the thickness T3 of the turn part 230 is larger than the thickness T4 of the extension part 240.

5 is a cross-sectional view schematically showing a planar heating element according to an embodiment of the present invention, and FIG. 6 is a schematic cross-sectional view taken along line C-C 'of the planar heating element shown in FIG. 5.

As illustrated, the planar heating element 1000 includes a hot wire pattern 1100, an insulating layer 1200, and a substrate 1300.

More specifically, the planar heating element 1000 includes an insulating layer 1200 to prevent a short circuit current of the hot wire pattern 1100 and to prevent a leakage current.

In addition, an insulating layer 1200 is formed on one surface of the substrate 1300, and a hot wire pattern 1100 is formed on one surface of the insulating layer 1200. Accordingly, the substrate 1300, the insulating layer 1200, and the hot wire pattern 1100 are stacked in this order.

In addition, since the hot wire pattern 1100 is the same as the hot wire pattern 100 of the planar heating element shown in FIG. 1, detailed descriptions of the detailed technical configuration and their organic coupling and operation effects will be omitted.

In addition, the insulating layer 1200 prevents a short circuit current of the hot wire pattern 1100 during high output driving and blocks the current from leaking to the rear surface of the substrate.

In addition, the hot wire pattern may be formed of the hot wire pattern 200 of the planar heating element shown in FIG.

It is to be understood that the foregoing embodiments are illustrative in all respects and not restrictive, the scope of the invention being indicated by the claims that follow, rather than the foregoing detailed description. And the meaning and scope of the claims to be described later, as well as all changes and modifications derived from the equivalent concept should be construed as being included in the scope of the invention.

Claims

A first end and a second end positioned respectively at the start end and the end end based on the flow of current;

An extension part connected to the first end and the second end and extending in one direction or the other direction; And

A turn part connected to the extension part to change a traveling direction of the extension part,

A plurality of turn parts and the extension part are alternately connected, and a gap between the adjacent turn part and the extension part is larger than a gap between the adjacent extension part and another extension part.

Hot wire pattern structure for surface heating element.
The method of claim 1,

The thickness of the turn portion is greater than the thickness of the extension portion

Hot wire pattern structure for surface heating element.
The method of claim 2,

The turn part is formed by an over-coat process of printing the same material twice.

Hot wire pattern structure for surface heating element.
The method of claim 1,

The extension portion is composed of an arc extending in a clockwise or counterclockwise direction,

One end of the turn part is connected to the extension part extending in the clockwise direction, the other end is connected to the extension part extending in the counterclockwise direction, and has a semicircular three-dimensional shape having an inner diameter and an outer diameter.

Hot wire pattern structure for surface heating element.
The method of claim 4, wherein

The extension part connected to the first end and the second end may be circular in shape, and at least one turn part may be located outside the extension part.

Hot wire pattern structure for surface heating element.
The method of claim 4, wherein

It is generally circular by said extension part connected to said first end and said second end, and said turn part is located inside said extension part.

Hot wire pattern structure for surface heating element.
The method of claim 1,

The gap between the extension and the extension adjacent to the turn is smaller than the gap between the extension and the extension spaced from the turn.

Hot wire pattern structure for surface heating element.
A base substrate;

An insulating layer laminated on one surface of the base substrate; And

It includes a hot wire pattern formed to be laminated on one surface of the insulating layer,

The heating wire pattern may include a first end portion and a second end portion positioned at the start end portion and the end portion based on the flow of current, and an extension portion connected to the first end portion and the second end portion and extending in one direction or the other direction. And a turn part connected to the extension part to change a traveling direction of the extension part.

A plurality of turn parts and the extension part are alternately connected, and a gap between the adjacent turn part and the extension part is larger than a gap between the adjacent extension part and another extension part.

Planar heating element.
The method of claim 8,

The thickness of the turn portion is greater than the thickness of the extension portion

Planar heating element.