KR20130083603A

KR20130083603A - Planar heating apparatus

Info

Publication number: KR20130083603A
Application number: KR1020120004285A
Authority: KR
Inventors: 원제홍
Original assignee: 삼성중공업 주식회사
Priority date: 2012-01-13
Filing date: 2012-01-13
Publication date: 2013-07-23

Abstract

PURPOSE: A planar heating apparatus is provided to prevent spark, by interposing a flexible conductive adhesive layer between an exothermic member and an electrode member. CONSTITUTION: A plurality of exothermic members (210) is arranged in parallel with each other. An electrode member includes a first electrode member (220a) and a second electrode member (220b). The electrode member applies electricity to the plurality of exothermic members. One side of an electricity supply member (230) is connected to a power source. The opposite side of the electricity supply member is connected to the second electrode member.

Description

Planar heating element {PLANAR HEATING APPARATUS}

The present invention relates to a planar heating element, and more particularly to a sheet type planar heating element that generates heat by electrical resistance.

In the drying of paint surface of ships, heat is applied to the painted surface by using a hot air fan or infrared equipment to shorten the drying time.As a part of this drying method, a heating film, that is, a planar heating element, is brought close to or attached to the painted surface. The paint is dried.

As disclosed in the following prior art, a planar heating element generally generates heat by electric resistance by applying electricity to a carbon heating element, and supplies electricity by connecting copper wires in parallel to both ends of the heating element, A silver paste is interposed between the heating element and the copper wire to act as a buffer.

However, the planar heating element made of a laminated structure of carbon, copper, and silver has no incompatibility between materials, and thus has weak adhesion between layers, so that the laminated structure is easily damaged even by light impact, bending and torsion, and sparks may cause fire. In addition, the use of silver, a precious metal, places a heavy burden on raw materials.

In addition, the conventional planar heating element may cause a problem that the coating surface is unevenly dried due to a temperature deviation at both ends when a predetermined length or more.

Korean Patent Registration No. 10-0965745

Embodiments of the present invention to provide a planar heating element excellent in durability.

Embodiments of the present invention to provide a planar heating element that generates heat uniformly.

According to an aspect of the invention, the planar heating element, a plurality of heat generating members arranged in parallel to each other; A first electrode member connected to one end of the plurality of heat generating members, one side connected to a power source, and a second electrode member connected to opposite ends of the plurality of heat generating members, and applying electricity to the plurality of heat generating members. An electrode member; And an electricity supply member disposed in parallel with the second electrode member, the one side of which is connected to the power source, and the other side of which is connected to the second electrode member.

The planar heating element may further include a conductive adhesive layer interposed between the heating member and the electrode member to adhere the heating member to the electrode member.

The heating member and the electrode member may be spaced apart from each other and indirectly connected by the conductive adhesive layer.

In addition, the electrode member and the electricity supply member may be provided of the same material.

In addition, the planar heating element is laminated on the heat generating layer formed by the heat generating member, the electrode member and the electricity supply member, the protective film for passing heat; And a heat insulating film laminated under the heat generating layer and blocking heat.

In addition, the protective film may be provided as a solvent-resistant material.

The planar heating element may further include a protective film laminated on an upper portion of the heating layer formed by the heating member, the electrode member, and the electricity supply member; And a heat insulating film laminated under the heat generating layer.

The planar heating element may further include an insulating film provided between the heating layer and the protective film and between the heating layer and the thermal insulation film.

The planar heating element may further include an immersion tester disposed between the plurality of heat generating members.

The plurality of heat generating members may be spaced apart from each other at a first interval by a predetermined number, and the plurality of heat generating groups including heat generating members spaced at the first interval may be spaced apart from each other at a second interval.

According to another aspect of the invention, the planar heating element, a heat generating layer for generating heat; Insulating films attached to upper and lower portions of the heating layer; A protective film laminated on the heat generating layer and passing heat; And a heat insulating film laminated under the heat generating layer and blocking heat, wherein the heat generating layer includes a plurality of heat generating members arranged in parallel with each other and a conductive adhesive layer provided at both ends of the plurality of heat generating members. A first electrode member connected to the conductive adhesive layer at one end of the plurality of heat generating members, one side of which is connected to a power source, a second electrode member connected to the conductive adhesive layer at opposite ends of the plurality of heat generating members, and the And an electrical supply member disposed in parallel with a second electrode member, the one side of which is connected to the power source, and the other side of which is connected to the second electrode member.

In addition, the plurality of heat generating members may be provided such that a predetermined number of continuously arranged heat generating members form a plurality of heat generating groups, and the planar heating element may further include an immersion tester disposed between the plurality of heat generating groups.

Embodiments of the present invention, by indirectly connecting the heat generating member and the electrode member via a flexible conductive adhesive layer between the heat generating member and the electrode member, it is durable against deformation and prevents sparks from occurring can do.

Embodiments of the present invention, by applying electricity to the opposite side of the two electrode members by using the electrical supply member can generate heat uniformly the whole heat generating member.

1 is an exploded perspective view of a planar heating element according to an embodiment of the present invention.
2 is a cross-sectional view of the planar heating element of FIG.
3 is a plan view of the heat generating layer of bath 1. FIG.
4 is a cross-sectional view of the heating layer of FIG. 3.
5 is an operation diagram of the heat generating layer of FIG. 3.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to be illustrative of the present invention and not to limit the scope of the invention. Should be interpreted to include modifications or variations that do not depart from the spirit of the invention.

The terms used in the present specification and the accompanying drawings are for easily explaining the present invention, and the shapes shown in the drawings are exaggerated and displayed to help understanding of the present invention as necessary, and thus, the present invention is used herein. It is not limited by the terms and the accompanying drawings.

In the following description, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

The planar heating element 100 according to the embodiment of the present invention may generate heat by the electrical resistance. The planar heating element 100 may be spaced apart from each other at predetermined intervals on the coating surface of a ship, for example, a ship, or may be in direct contact with each other to dry the dry object by heat. In this case, the planar heating element 100 may transfer heat through the contact surface or radiate infrared rays to transmit heat.

Of course, the use of the planar heating element 100 is not limited to the above-described example. For example, the planar heating element 100 may be used for heating purposes such as an electric field plate.

The planar heating element 100 may be provided in a sheet type. That is, the planar heating element 100 may be provided in a rectangular plate shape when viewed from the top. At this time, the length or width of the planar heating element 100 may be appropriately changed in consideration of the size or width of the drying object.

Hereinafter, the planar heating element 100 according to the embodiment of the present invention will be described.

1 is an exploded perspective view of a planar heating element 100 according to an embodiment of the present invention.

Referring to FIG. 1, the planar heating element 100 includes a heat generating layer 200, a protective film 110, a heat insulating film 120, and an insulating film 130.

The planar heating element 100 may be provided in a laminated structure. In the planar heating element 100, the protective film 110, the heating layer 200, and the thermal insulation film 120 may be sequentially stacked. In addition, the insulating film 130 is interposed between the heating layer 200 and the protective film 110 and between the heating layer 200 and the heat insulating film 120, respectively.

The heat generating layer 200 receives heat from an external power source to generate heat. When electricity is applied to the heat generating layer 200, heat is generated by electric resistance. Here, the generated heat may be directly conducted to the object to be dried or radiated in the form of infrared rays. A detailed description of the heat generating layer 200 will be described later.

The protective film 110 may be provided on the heating layer 200. The protective film 110 may be provided to cover the entire upper surface of the heating layer 200. The protective film 110 may be disposed to face the object to be dried. The protective film 110 may be directly attached to the dry object or disposed spaced a predetermined interval apart.

The protective film 110 may transmit heat. Heat generated in the heat generating layer 200 may be transferred to the drying object through the protective film 110. For example, heat generated in the heat generating layer 200 may be transmitted to the dry object in close contact with the protective film 110 through the protective film 110 or transmitted through the protective film 110 in a far infrared form. The arrow in FIG. 1 shows the direction in which heat is transferred. In addition, since the protective film 110 receives heat from the heating element, the protective film 110 may be provided as a material having strong heat resistance.

The protective film 110 may be provided with a material having strong solvent resistance. The protective film 110 of the solvent-resistant material may protect the insulation film 130, the heat insulation film 120, and the like, including the heating layer 200. For example, in the case of drying the painted surface, the protective film 110 of the solvent-resistant material may provide the planar heating element 100 with durability to a drying environment such as paint.

The heat insulation film 120 may be provided under the heat generating layer 200. The heat insulation film 120 may be provided to cover the entire lower surface of the heat generating layer 200. The thermal insulation film 120 may be disposed on an opposite surface facing the object to be dried.

The thermal insulation film 120 may insulate heat. Heat generated in the heat generating layer 200 is blocked by the heat insulating film 120 and is not transmitted in a direction facing the dry object. Therefore, heat generated in the heat generating layer 200 may be transmitted only in the direction in which the protective film 110 is disposed, that is, in the direction of the drying object. Accordingly, the heat loss in the opposite direction of the drying object can be removed, and the heat generation efficiency of the planar heating element 100 can be improved.

The insulating film 130 may insulate the heating layer 200. Accordingly, the electricity applied to the heating layer 200 may be prevented from leaking to the protective film 110 at the upper portion or the heat insulating film 120 at the lower portion thereof. The insulating film 130 may be provided with an insulating resin material.

The insulating film 130 may include a first insulating film 130 and a second insulating film 130. The first insulating film 130 may be interposed between the heating layer 200 and the protective film 110. The first insulating film 130 is installed on the upper surface of the heat generating layer 200 to prevent electricity from leaking from the heat generating layer 200 to the protective film 110 disposed thereon. The second insulating film 130 may be interposed between the heating layer 200 and the heat insulating film 120. The second insulating film 130 may be installed on the bottom surface of the heat generating layer 200 to prevent electricity from leaking from the heat generating layer 200 to the heat insulating film 120 disposed thereon.

2 is a cross-sectional view of the planar heating element 100 according to the embodiment of the present invention.

Referring to FIG. 2, the insulating film 130 may be provided to be spaced apart from the protective film 110 or the thermal insulation film 120 by a predetermined interval. For example, the first insulating film 130 is attached to the upper surface of the heat generating layer 200, the adhesive 140a is applied to both edges of the upper surface of the first insulating film 130 to a constant height, the adhesive 140a The protective film 110 may be placed on the). Accordingly, the first insulating film 130 and the protective film 110 may be spaced apart from each other with a step corresponding to the height of the adhesive 140a. Similarly, the second insulating film 130 is attached to the lower portion of the heating layer 200, the adhesive 140b is applied to both edges of the lower surface of the second insulating film 130 to a constant height, the adhesive 140b The thermal insulation film 120 may be placed below. Accordingly, the second insulating film 130 and the heat insulating film 120 may be spaced apart from each other with a step corresponding to the height of the adhesive 140b.

When the insulating film 130 is provided in such a structure, elasticity is provided to the planar heating element 100 by a space between the insulating film 130 and the protective film 110 or the heat insulating film 120, thereby causing a light impact, bending, or torsion. Local breakage of the planar heating element 100 due to the like can be prevented.

Of course, the arrangement of the insulating film 130 is not limited to the above-described example. For example, the adhesives 140a and 140b may be applied in different directions or at different intervals from the above examples. For another example, some of the first insulating film 130, the protective film 110, and the second insulating film 130 and the heat insulating film 120 may be adhered to each other. In particular, when the first insulating film 130 and the protective film 110 are spaced apart, the heat generation efficiency to the drying object may be reduced, so that the first insulating film 130 and the protective film 110 are in close contact with each other. It may be selected in consideration of the drying efficiency and the use of the planar heating element (100).

Hereinafter, the heat generating layer 200 according to the embodiment of the present invention will be described.

3 is a plan view of the heat generating layer 200 of the tank 1.

Referring to FIG. 3, the heating layer 200 includes a heating member 210, an electrode member 220, an electrical supply member 230, a connection line 235, a conductive adhesive layer 240, and a submersion tester 250. can do.

The heat generating member 210 generates heat. The heating member 210 may generate heat by electric resistance when electricity is applied. For example, the heating member 210 may radiate far infrared rays when electricity is applied. The heat generating member 210 may be provided, for example, of carbon material. Of course, the material of the heat generating member 210 is not limited to carbon.

The heat generating member 210 may be provided so that its length is longer than the width. Electricity may be applied to both ends of the heat generating member 210 in the longitudinal direction. Accordingly, the heat generating member 210 may generate heat by resistance while current flows from one end to the other end.

The heating member 210 may be provided in plurality. The plurality of heat generating members 210 may be arranged in parallel along the longitudinal direction of the planar heating element 100. The plurality of heat generating members 210 arranged in parallel may be arranged side by side in the longitudinal direction, respectively. Accordingly, the heating member 210 may be disposed in the longitudinal direction of the heating member 210 to be perpendicular to the longitudinal direction of the planar heating element 100. Although 12 heat generating members 210 are provided in the heat generating layer 200 in FIG. 3, the number of heat generating members 210 is not limited thereto, and may be appropriately added or subtracted as necessary.

The plurality of heat generating members 210 may be arranged to form a plurality of heat generating groups. The heat generating groups may be formed of a predetermined number of heat generating members 210, respectively. For example, the twelve heat generating members 210 may be formed of three heat generating groups each having four heat generating members 210.

As such, when the plurality of heat generating members 210 form a plurality of heat generating groups, the heat generating members 210 belonging to the same heat generating group may be continuously spaced apart at a first interval. Each of the heating groups may be spaced apart from each other by a second interval larger than the first interval. When the plurality of heat generating members 210 are arranged in such a structure, the planar heating element 100 may be stably rolled or unfolded along the longitudinal direction of the planar heating element 100 while the space between the heat generating groups is folded. In addition, when the plurality of heat generating members 210 are formed by forming a plurality of heat generating groups, the planar heat generating members 210 may be used to appropriate lengths by cutting between the spaces of the heat generating groups. Of course, the plurality of heat generating members 210 may be arranged to be spaced apart at regular intervals without forming a heat generating group.

The electrode member 220 applies electricity to the heat generating member 210. The electrode member 220 may have the same length direction as the length direction of the planar heating element 100. Accordingly, the length of the electrode member 220 may be perpendicular to the length direction of the heat generating member 210.

The electrode member 220 may be provided of a material having high electrical conductivity. For example, the electrode member 220 may be provided with a copper material.

The electrode member 220 may include a first electrode member 220a and a second electrode member 220b. The first electrode member 220a and the second electrode member 220b may be disposed in parallel to each other. The first electrode member 220a may be disposed on one end of the plurality of heat generating members 210. The second electrode member 220b may be disposed on opposite ends of the plurality of heat generating members 210. The first electrode member 220a and the second electrode member 220b may be directly contacted with the heat generating member 210 or indirectly through the conductive adhesive layer 240 to be described later.

Electricity may be applied to one side (the left side in FIG. 3) of the first electrode member 220a. In addition, the second electrode member 220b may be supplied with electricity to an opposite side (right side in FIG. 3) of one side to which electricity of the first electrode member 220a is applied. That is, electricity may be applied in opposite directions from the first electrode member 220a and the second electrode member 220b. Accordingly, current flows in the same direction in the first electrode member 220a and the second electrode member 220b. Therefore, a plurality of heat generating members 210 disposed between the first electrode member 220a and the second electrode member 220b may flow a current having substantially the same size to generate heat uniformly. As a result, the planar heating element 100 can generate heat at a uniform temperature as a whole regardless of the longitudinal direction, and when the planar heating element 100 dries the coated surface, the entire area of the coated surface on which the planar heating element 100 is installed. This can be dried evenly.

If electricity is applied in the same direction of the first electrode member 220a and the second electrode member 220b, a current higher than the opposite side flows to the side to which the electricity is applied. Therefore, a plurality of heat generating members 210 generate less amount of heat toward the opposite direction from the direction in which electricity is applied, thereby causing a deviation in temperature, and when the planar heating element 100 dries the painted surface, According to the direction in which the heating element 100 is installed, some areas may be dried first, and some areas may be slowly dried to reduce coating quality.

As described above, the heat generating layer 200 for applying electricity in different directions to the first electrode member 220a and the second electrode member 220b generates heat evenly over the entire area, thereby drying the coating. Made uniformly, the coating quality can be improved.

The electricity supply member 230 is disposed adjacent to the second electrode member 220b. The electricity supply member 230 may have a length direction the same as a length direction of the planar heating element 100. That is, the electricity supply member 230 may be disposed in parallel with the second electrode member 220b. In addition, the electrical supply member 230 may be fixed between the insulating film 130 with the adhesive 140c interposed between the upper and lower portions thereof.

The electricity supply member 230 may be provided in the same or similar shape as the first electrode member 220a or the second electrode member 220b. For example, the electricity supply member 230 may have the same length as the second electrode member 220b. In addition, the electrical supply member 230 may be provided with a material having excellent electrical conductivity. Here, the electrical supply member 230 may be provided of the same material as the electrode member 220. For example, the electricity supply member 230 may be provided of a copper material. Of course, the electrical supply member 230 may be different in shape and material from the electrode member 220. For example, the electricity supply member 230 may be provided to have a width different from that of the second electrode member 220b.

One side of the electricity supply member 230 (left side of FIG. 3) may be connected to a power source. Accordingly, electricity is applied to the electricity supply member 230 from one side. In addition, the opposite side of the electrical supply member 230 may be connected to the opposite side of the second electrode member (220b). For example, a connection line 235 connecting the two may be provided on the opposite side of the electrical supply member 230 and the opposite side of the second electrode member 220b. Here, the connecting line 235 may be omitted from the components of the insulating layer and may be provided as an external component. The connection line 235 provided as an external component may be provided in a detachable form. On the other hand, one side of the first electrode member 220a may be connected to a power source.

According to this structure, the first electrode member 220a and the electricity supply member 230 are connected to a power source in the same direction so that electricity is applied thereto, and the second electrode member 220b is provided in the opposite direction to the same direction. 230 may be supplied with electricity. Accordingly, electricity is applied to the first electrode member 220a and the second electrode member 220b from opposite directions to uniformly generate heat.

In the above, the structure in which the electricity supply member 230 is independently present has been described. In some cases, the electricity supply member 230 and the second electrode member 220b may be integrally provided. For example, the second electrode member 220b and the electricity supply member 230 may be provided as an integrated plate or sheet having a 'c' shape coupled to the opposite side.

The conductive adhesive layer 240 is interposed between the heating member 210 and the electrode member 220.

Carbon has a resistance value of about 1400 ~ 4000uΩcm and copper has a resistance value of about 0.1 ~ 2uΩcm, so that the heating member 210 and the electrode member 220 are closely connected to each other without a buffer area in the middle because the difference in resistance is very large. In this case, conductivity may be degraded or local overheating may occur. In addition, the heat generating member 210 of the carbon material and the electrode member 220 of the copper material is very low, so that the breakage such as short-circuit occurs when the planar heating element 100 is folded or unfolded.

In addition, even when using silver paste, there is no correspondence between carbon, silver, and copper materials, and thus there is no interlayer adhesion. Accordingly, a short circuit may occur when deformation of the planar heating element 100 causes sparking and damage. In addition, the silver paste of the silver material has a high unit cost and may act as a factor of increasing the manufacturing cost of the planar heating element 100.

The conductive adhesive layer 240 is interposed between the heat generating member 210 and the electrode member 220 to stably fix the two, prevent breakage, and also provide an electric shock absorbing function, which may be advantageous in terms of price. .

4 is a cross-sectional view of the heating layer 200 of FIG. 3.

Referring to FIG. 4, the conductive adhesive layer 240 may be provided such that a portion of the conductive adhesive layer 240 is stacked on the heat generating member 210 and the electrode member 220 is stacked on the other portion of the heat generating member 210. The conductive adhesive layer 240 may be provided at both ends of the heating member 210, respectively. The conductive adhesive layer 240 provided at the ends of each of the heating member 210 may be formed of the first electrode member 220a and the first electrode member 220a. The two electrode members 220b may be stacked. Of course, the form in which the conductive adhesive layer 240 is interposed between the heating member 210 and the electrode member 220 is not limited to the above-described example. For example, the electrode member 220, the conductive adhesive layer 240, and the heat generating member 210 may be sequentially stacked or sequentially disposed in the horizontal direction.

The conductive adhesive layer 240 bonds the heating member 210 and the electrode member 220. The conductive adhesive layer 240 contains an adhesive component to bond the heating member 210 and the electrode member 220 in contact therewith. In addition, the conductive adhesive layer 240 may conduct electricity. It may contain excellent conductive materials. Accordingly, even though the heating member 210 and the electrode member 220 are physically separated from each other by the conductive adhesive layer 240, they may be electrically connected through the conductive adhesive layer 240. In addition, the conductive adhesive layer 240 may be provided with a flexible and excellent elastic material. Accordingly, even when the planar heating element 100 is folded, bent or folded, damage to the electrode member 220, the conductive adhesive layer 240, and the heating member 210 may be prevented.

For example, silicon (Si) -based inorganic adhesive or carbon-based organic adhesive may be used as the conductive adhesive layer 240. The conductive adhesive layer 240 provides an adhesive force of 3 MPa or more, has a resistance value of about 0.1 to 2 uΩ / cm, and may be excellent in elasticity.

The immersion tester 250 may indicate whether the heating layer 200 is immersed. The immersion tester 250 may change its color when exposed to moisture. For example, the immersion tester 250 may be a porphyrin complex compound or inorganic hydrochloric acid containing other than cobalt chloride. When moisture penetrates into the heat generating layer 200 from the protection film 110 or the heat insulation film 120 in the planar heating element 100, the color of the immersion tester 250 is changed and based on the color of the immersion tester 250. You can determine whether it is flooded.

Immersion tester 250 may be disposed between the spaced space of the heating member (210). The submerged tester 250 may be provided in the same length direction as that of the heat generating member 210. In addition, when the plurality of heat generating members 210 are arranged to form a plurality of heat generating groups including a predetermined number of heat generating members 210, the immersion tester 250 may be disposed between the spaces between the heat generating groups.

Meanwhile, the protective film 110, the insulating film 130, or the thermal insulation film 120 surrounding the heating layer 200 may be provided with a transparent material so that the immersion tester 250 may be visually observed. Alternatively, a hole or a window for visually observing the immersion tester 250 may be formed in the protective film 110, the first insulating film 130, or the thermal insulation film 120.

5 is an operation diagram of the heat generating layer 200 of FIG. 3.

Referring to FIG. 5, an external power source is connected in the same direction as the first electrode member 220a and the electricity supply member 230 in the heating element. In addition, the second electrode member 220b is connected to the electricity supply member 230 in a direction opposite to the direction in which the power is connected. Accordingly, electricity flows in the same direction in the first electrode member 220a and the second electrode member 220b. Therefore, the plurality of heat generating members 210 connected to the electrode member 220 generates heat of substantially the same size, and thus, the entire region of the heat generating layer 200 or the planar heating element 100 may generate heat at a uniform temperature. have.

On the other hand, the power supply for supplying electricity may be provided as a component of the planar heating element (100). In addition, an electric leakage breaker and an overheat temperature breaker may be installed between the power supply and the planar heating element 100 to control heat generation of the planar heating element 100.

100: planar heating element
110: protective film 120: insulating film 130: insulating film
140a, 140b, 140c: adhesive
200: heating layer 210: heating member
220: electrode member 220a: first electrode member 220b: second electrode member
230: electrical supply member 235: connecting line
240: conductive adhesive layer
250: Immersion Tester

Claims

A plurality of heat generating members arranged in parallel with each other;
A first electrode member connected to one end of the plurality of heat generating members, one side connected to a power source, and a second electrode member connected to opposite ends of the plurality of heat generating members, and applying electricity to the plurality of heat generating members. An electrode member; And
And an electrical supply member disposed in parallel with the second electrode member, the one side of which is connected to the power source, and the other side of which is connected to the second electrode member.
Planar heating element.

The method of claim 1,
A conductive adhesive layer interposed between the heat generating member and the electrode member to adhere the heat generating member to the electrode member;
Planar heating element.

The method of claim 2,
The heating member and the electrode member are disposed spaced apart from each other, indirectly connected by the conductive adhesive layer
Planar heating element.

The method of claim 1,
The electrode member and the electricity supply member is provided of the same material
Planar heating element.

The method of claim 1,
A protective film laminated on an upper portion of the heating layer formed by the heating member, the electrode member, and the electricity supply member, and configured to pass heat; And
A heat insulating film laminated on the lower portion of the heat generating layer, and blocks the heat;
Planar heating element.

The method of claim 5,
The protective film is provided with a solvent-resistant material
Planar heating element.

The method according to claim 6,
And insulating films provided between the heating layer and the protective film and between the heating layer and the heat insulating film.
Planar heating element.

The method of claim 1,
Further comprising a; Immersion tester disposed between the plurality of heat generating members
Planar heating element.

The method of claim 1,
The plurality of heat generating members, a predetermined number is spaced apart at a first interval,
A plurality of heat generating groups consisting of heat generating members spaced apart at the first interval are spaced apart from each other at a second interval
Planar heating element.

A heat generating layer generating heat;
Insulating films attached to upper and lower portions of the heating layer;
A protective film laminated on the heat generating layer and passing heat; And
Including; heat insulating film laminated on the lower portion of the heating layer to block heat;
The heat-
A plurality of heat generating members arranged in parallel to each other,
Conductive adhesive layers provided at both ends of the plurality of heat generating members;
A first electrode member connected to the conductive adhesive layer at one end of the plurality of heat generating members, one side of which is connected to a power source;
A second electrode member connected to the conductive adhesive layer at opposite ends of the plurality of heating members;
And an electrical supply member disposed in parallel with the second electrode member, one side of which is connected to the power source, and the other side of which is connected to the second electrode member.
Planar heating element.

10. The method of claim 9,
A plurality of heat generating members are provided so that a predetermined number of the heat generating members arranged in series form a plurality of heat generating groups,
Further comprising a; Immersion tester disposed between the plurality of heating groups
Planar heating element.