KR20040014913A - Planar heat generator, panel using the same and method of producing the same - Google Patents

Abstract

PURPOSE: To provide a plane heating element which hardly has deformation, twisting, bending or the like and does not have the occurrence of waving and wrinkles even if it becomes of a long size and a wide area, and in which the exothermic performance is not affected even if the plane heating element is bent more or less according to the configuration of the installation portion, and which is low in cost and easy to manufacture. CONSTITUTION: In the plane heating element in which a resistance heating element is formed by connecting an end part of a long stainless steel tape by a short stainless steel tape for binding, and the outside of this resistance heating element is covered by a resin film, and, by supplying power from the terminal part provided at the long stainless steel tape or the short stainless steel tape, the resistance heating element generates heat, the stainless steel tape is formed of austenite system stainless steel or precipitation hardening stainless steel. It is desirable that as the austenite system stainless steel, a spring stainless steel having 17Cr-7Ni or 18Cr-8Ni composition is used, and as the precipitation hardening stainless steel, a spring stainless steel having 17Cr-7Ni-1Al composition is used.

Description

Planar heating element, planar heating element panel and planar heating element manufacturing method using the planar heating element {PLANAR HEAT GENERATOR, PANEL USING THE SAME AND METHOD OF PRODUCING THE SAME}

The present invention relates to a planar heating element formed by coating a resistance heating element formed of stainless with a resin film such as a laminate film, a planar heating element panel using the planar heating element, and a method of manufacturing the planar heating element.

Planar heating elements used for roof snow melting heaters, floor heating heaters, mat heaters (including carpets), and the like are well known.

For example, the planar heating element disclosed in Japanese Patent No. 2586180 is formed by sandwiching a stainless steel foil having a plate thickness of about 50 μm in a meandering shape with an insulating upper and lower resin film, and then connecting the connecting piece and the upper and lower resin film parts. It removes and presses and heats the whole through an adhesive material, and is integrated.

However, the planar heating element described in the above publication is weak in strength because of a very thin member formed by meandering stainless steel foil, and it is easy to cause a heater pattern to move, deformation, torsion, folding, etc. during the manufacturing process of pressurization and heating. There was a problem.

In addition, in order to absorb the stretching action of the stainless foil at the time of heat generation, the upper and lower ends of the resin film are covered with a U-shaped cross-sectional insulating frame having a gap, but the configuration of the planar heating element becomes complicated, and it is not only troublesome at the time of pressing and heating. The insulation frame had to be coated on the edge part of the upper and lower resin films, and the manufacturing work became complicated and the manufacturing cost became high.

Therefore, in order to solve such a problem, stainless steel is formed into a tape having a constant sheet thickness (plate thickness of 70 μm or more), and the tape-shaped stainless tape is connected in a meander shape to form a resistance heating element, which is insulated. It is proposed to embed it in the resin layer.

However, when the planar heating element is elongated or the optical area becomes large, a wave phenomenon occurs after manufacturing, which makes it unsuitable for the mounting surface. There was a problem that (heater pattern) was disconnected and cannot be actually used.

This is predicted to be due to the difference in thermal contraction rate of the upper and lower resin films and the resistance heating element.

In addition, when the planar heating element is folded in accordance with the shape of the installation portion, there is a problem that the wrinkles are generated in the stainless tape, the electrical resistance value is fluctuated to obtain a stable heating performance.

In addition, although the conventional planar heating element panel using the planar heating element as described above is configured by laminating the planar heating element and the heat insulating material, there is a problem that the temperature irregularity occurs because the overall temperature of the planar heating element panel is not uniform.

The present invention has been made in view of the above-mentioned problems, and it is difficult to deform, torsion, or fold, and does not generate waves or wrinkles even when it is long or wide, and even if the planar heating element is slightly folded to match the shape of the installation part. Providing a planar heating element and a method for manufacturing the planar heating element which can be manufactured by an inexpensive and simple process without affecting the heat generating performance, and furthermore, the planar heating element panel using the planar heating element can effectively suppress the occurrence of temperature unevenness. It is an object of the present invention to provide a planar heating element panel.

BRIEF DESCRIPTION OF THE DRAWINGS It is related with one Embodiment of the surface heating element of this invention, and is an exploded perspective view for demonstrating the structure.

FIG. 2 is a view for explaining the first embodiment of the laminating apparatus, and schematically shows the configuration of the main part thereof.

Fig. 3 is a view for explaining a second embodiment of the laminating device, and schematically shows the configuration of its main part.

4 is a diagram showing a first embodiment of the method for producing a planar heating element.

It is a figure which shows 2nd Embodiment of the manufacturing method of a surface heating element.

6 is an exploded perspective view of an embodiment of a planar heating element panel.

In order to achieve the above object, the planar heating element of the present invention connects an end portion of a long stainless tape to a short stainless tape for connection to form a resistance heating element, and covers the outside of the resistance heating element with a resin film, and the long stainless tape Or in the surface heating element which generate | occur | produces the said resistance heating element by supplying power from the terminal part provided in the said short stainless tape, it is the structure which formed the said stainless tape from austenitic stainless steel or precipitation hardening stainless steel.

Moreover, this invention is set as the structure whose adhesive strength of the said resin film and the said resistance heating body is 15 Kg peeling strength or more. The durability of the planar heating element can be improved by setting the adhesive strength between the resin film and the resistance heating element to 15 Kg peel strength or more.

Moreover, this invention coat | covers the both ends of the said long stainless tape by which the said short stainless tape was joined by the opaque member, and has comprised the said resin film on this. By configuring in this way, the connection part by a short stainless tape can be hidden and the designability of a planar heating element can be improved.

In addition, the present invention can set the plate thickness of the long stainless tape and the short stainless tape to 70 μm to 250 μm, so that problems such as disconnection or folding can be prevented from occurring.

In addition, the present invention has a configuration in which a part of the resistance heating element is bent in advance in accordance with the shape of the mounting portion of the planar heating element. As described above, the planar heating element of the present invention does not generate wrinkles well even when bent, and the effect on the heat generating performance is small, so that the shape can be changed relatively freely.

The planar heating element panel according to the present invention is a planar heating element panel formed by laminating the planar heating element in the order of the planar heating element, the metal sheet and the heat insulating material.

As said metal sheet, it is preferable that it is a sheet (aluminum sheet) formed from aluminum excellent in thermal conductivity, and the sheet thickness should be about 0.05 mm-about 1 mm.

According to the present invention, the heat of the planar heating element spreads to almost the entire surface of the planar heating element panel through the metal sheet, so that the whole of the planar heating element panel can be heated to an almost uniform temperature.

In addition, in the method for manufacturing a planar heating element of the present invention, an end portion of a long stainless tape is connected to a short stainless tape for connection to form a resistance heating element, and the outside of the resistance heating element is coated with a resin film to form the long stainless tape or the In the method for producing a planar heating element that generates heat for the resistance heating element by supplying power from a terminal portion provided on the short stainless tape, the long stainless tape and the short stainless tape are made of 17Cr-7Ni, 18Cr-8Ni, or 17Cr-7Ni-1Al. First heating means which is formed of a stainless steel for a spring having a composition and heats the resistance heating element to at least one surface side, and heats the resistance heating element to a first predetermined temperature, and the resin film is heated to a second predetermined temperature. Preparing a second heating means to make the resistance heating element The resin film heated to the first temperature by the first heating means and then heated to the second temperature by the second heating means is brought into close contact with the surface of the resistance heating element, and the resin is applied to the resistance heating element. It becomes the manufacturing method which welded the film.

In addition, since the spring stainless steel is softened by heat treatment, wrinkles do not easily occur in the folded portion even when bent, and even if the surface heating element is partially bent in accordance with the shape of the installation portion for installing the surface heating element, the effect on the heat generation performance is small. can do.

Moreover, this invention is a heating roller which the said 2nd heating means is arrange | positioned at the both sides of the said resistance heating body, and heats the said resin film to the said 2nd temperature preset, The said 1st heating means is a vicinity of the said heating roller. And an inlet side for inserting the resistance heating element between the heating rollers, and immediately after heating the resistance heating element to the first temperature, inserting the resistance heating element between the heating rollers to both sides of the resistance heating element. It becomes a manufacturing method which welds the said resin film heated at the said 2nd temperature.

According to this method, the resin film can be uniformly welded to the resistance heating element without wrinkles by the heating roller. Moreover, by setting the 1st temperature and 2nd temperature suitably, the cooling rate of a resin film and the cooling rate of a resistance heating body can be made the same, and generation | occurrence | production of a wrinkle by a shrinkage rate difference, etc. can be prevented.

Moreover, in this invention, a said 1st heating means is a heating blower, sends the warm air blown out from this heating blower to the inlet of the said heating roller, prepares a shielding member between the said heating blower and the said heating roller, and this shielding It is a manufacturing method which guides the said warm air which flowed by the member toward the said heating roller from the vicinity of the said inlet to the said resistance heating element, and also the hot air of the said heating blower does not heat the said resin film of the said heating roller. In this way, when the shielding member is provided and the warm air flowing toward the heating roller is collected in the resistance heating element near the inlet, the temperature of the resistance heating element in the vicinity of the inlet can be brought closer to the first temperature which is the target temperature. Moreover, since a resin film is not heated by the warm air of a heating blower, it is possible to heat a resin film more correctly to the 2nd temperature which is a target temperature.

Moreover, this invention is the manufacturing method which arrange | positions the said 1st heating means to the both sides of the said resistance heating body, and heats the said resistance heating body to said 1st temperature on both sides. In this way, both surfaces of the resistance heating element can be accurately heated to the first temperature. In addition, the resistance heating element can be heated to the first temperature in a short time.

Moreover, this invention is a manufacturing method which provided the slow cooling means for adjusting the cooling rate of the said resin film and the said resistance heating body in the exit side of the said heating roller. By doing in this way, generation | occurrence | production of the wrinkle by the shrinkage rate difference of a resin film and a resistance heating body can be prevented.

Moreover, this invention is a manufacturing method whose said 1st temperature is 50 degreeC-200 degreeC, and said 2nd temperature is 50 degreeC-200 degreeC. By setting the first temperature and the second temperature within this range, the difference in shrinkage between the resistance heating element and the resin film can be reduced, and the occurrence of wrinkles can be effectively prevented.

In addition, the present invention connects the short stainless tape to one end of the long stainless tape, attaches a peeling member to the other end of the long stainless tape, and coats the resin film on the long end of the long stainless tape. After that, the resin film is partially peeled off at the other end to which the peeling member is attached, the peeling member is detached from the long stainless tape, and the short stainless tape is connected to the other end of the long stainless tape. It becomes the manufacturing method which welded the resin film to the said other end part. In this way, the wrinkles and the internal air sent to the other end side sequentially from one end side of the long stainless tape are opened on the other end side of the long stainless tape. Thereby, generation | occurrence | production of a wrinkle and residual air can be eliminated.

In addition, the present invention connects the short stainless tape to both ends of the long stainless tape, coats one end of the long stainless tape to which the short stainless tape is bonded with an opaque member, and at the other end of the long stainless tape. Coating to form a resistance heating element, covering the resin film on the one end side with the resistance heating element, partially peeling off the resin film from the other end to which the peeling member is attached, and removing the peeling member from the other end. It is a manufacturing method which cut | disconnected partially and apply | coated the adhesive material adhering to the said resin film on the surface of the said peeling member, and welded the said resin film to the said other end part. According to this method, a peeling member can be used as the opaque member, which is advantageous in terms of cost.

Preferred embodiments of the present invention will be described with reference to the drawings.

[Description of Structure of Planar Heating Element]

The planar heating element 1 of the first embodiment shown in FIG. 1 includes a resistive heating element 2 that generates heat by applying a voltage between the terminals 21a and 21a, and a transparent laminate coated on both sides of the upper limiting surface of the resistive heating element 2. It has a film 4.

The resistance heating element 2 includes a long stainless tape 21 arranged in parallel in one direction, a short stainless tape 22 alternately joining both ends of the long stainless tape 21, and a long stainless tape 21. It has the opaque member 3 which coat | covers at both ends and up and down at both ends, and hides the junction part by the short stainless tape 22 from the outside.

The long stainless tape 21 is formed at a plate thickness of about 70 μm to 250 μm, a width of about 10 mm, and a length of about 1000 mm to 4000 mm, and in producing the resistive heating element 2, it is possible to equalize several pieces (about 6 to about 10). Place them side by side in one direction at intervals. In addition, one end of the long stainless tape 21 located on both sides of the resistive heat generation 2 protrudes a part from the opaque member 3 to form the terminal portions 21a and 21a.

The short stainless tape 22 has a plate thickness of about 70 µm to 250 µm and a width of about 10 mm, and is formed in a length corresponding to the interval of the long stainless tape 21. And when manufacturing the resistance heating body 2, it joins to the edge part of the elongate stainless tape 21 by spot welding etc.

As stainless steel which comprises the long stainless tape 21 and the short stainless tape 22, an austenitic stainless steel or a precipitation hardening stainless steel is used.

The austenitic stainless steel has a property of being softened by applying heat treatment, and even when the planar heating element is bent in accordance with the shape of the installation portion for installing the planar heating element, wrinkles are hardly generated in the folded part, and thus the variation of the electrical resistance due to the wrinkles is reduced. There is an advantage that it can be made small.

Among the austenitic stainless steels, SUS301 and SUS304 (both JIS standards and SUS301 have a composition of 17Cr-7Ni and SUS304 have a composition of 18Cr-8Ni) may be used, which are used as spring stainless.

In addition, the precipitation hardening type stainless steel represented by SUS631 (which has the composition of 17Cr-7Ni-1Al) in JIS standard is subjected to the precipitation hardening heat treatment after cold rolling, and has an advantage that high strength can be obtained as compared with SUS301 and SUS304.

As the opaque member 3, it can be formed by insulating members, such as a nonwoven fabric and resin, and adhere | attaches the long stainless tape 21 and the short stainless tape 22 using an adhesive material etc. The opaque member 3 may be plate-shaped, but by using a flexible film-type, the opaque member 3 can be adhered to the shape of the joint portion of the long stainless tape 21 and the short stainless tape 22. have.

As the laminate film 4, for example, a transparent or opaque polyethylene resin (PET) film having a thickness of about 100 mu can be used. And this PET film is coat | covered on both upper and lower sides of the resistance heating body 2, and is bonded to the resistance heating body 2 by heat welding.

In this case, it is preferable that the adhesive strength between the laminate film 4 and the resistance heating element 2 is 15 Kg peel strength or more, preferably 20 Kg peel strength or more. By doing in this way, durability of a surface heating element can be improved.

Here, "peel strength" shows the adhesive strength of a resin film and a stainless tape. This peel strength can be measured by the peel test using a tensile tester. Specifically, a test piece having a width of 10 mm and a length of about 200 mm, in which a resin film and a stainless tape are bonded to each other, is prepared. Tensile at a tensile rate of 10 mm / min. Peeling strength can be calculated | required by the tensile load at the time of peeling a resin film and a stainless tape.

The welding of the laminate film 4 to the resistance heating element 2 covers the sheet-like laminate film 4 formed larger than the resistance heating element 2 on the resistance heating element 2, and the laminate film is heated by an iron or the like. While heating (4), it can be made to weld on the surface of the resistance heating body 2. As shown in FIG. In this case, in order to prevent air from remaining between the laminate film 4 and the resistance heating element 2 without wrinkles occurring in the laminate film 4, the laminate film ( It is good to weld 4).

Moreover, high peeling strength can be obtained by interposing an adhesive material between the laminate film 4 and the resistance heating element 2. As said adhesive material, although the raw material which improves adhesiveness with metals, such as an ethylene acrylate copolymer, can be used, it is preferable to use an ethylene-methacrylic acid copolymer especially preferably.

Moreover, by using the lamination apparatus provided with the heating roller as demonstrated below, the laminated film 4 can be welded to the resistance heating body 2 efficiently and neatly.

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of the laminating apparatus which welds the laminated film 4 to the resistance heating body 2 using a heating roller is demonstrated, referring FIG. 2 and FIG.

[First Embodiment of Laminate Device]

FIG. 2 is a view for explaining the first embodiment of the laminating apparatus, and schematically shows the configuration of the main part thereof. In addition, in FIG. 2, it is assumed that the resistance heating element 2 is welded to the laminate film 4 while being conveyed from the left side to the right side of the drawing.

The laminating device 51 includes two heating rollers 510 and 510 disposed to face each other; A loading table 515 provided at the inlet side (left side in FIG. 2) of the heating rollers 510, 510 to guide the resistance heating element 2 between the heating rollers 510, 510; An unloading table 516 provided on the exit side (the right side of the heating roller) of the heating rollers 510 and 510 to guide the unloading of the resistive heating element 2 on which the laminate film 4 is welded; And a heating blower 513 that is disposed near the inlet of the heating rollers 510 and 510 and serves as a heating means for heating the surface of the resistance heating element 2 to a predetermined temperature.

The laminate film 4 is applied to one surface of the laminate in contact with the resistance heating element 2, and is held in a laminate film supply unit (not shown) in a state of being wound in a roll form. Two laminate film supply parts are provided corresponding to two heating rollers 510 and 510, and the laminate film 4 supplied from each laminate film supply part is wound around each heating roller 510. As shown in FIG. The heating rollers 510 and 510 incorporate a heater (not shown), which heats the laminate film 4 to a temperature at which the adhesive can be melted, and each of the heating rollers 510 and 510 is a resistance heating element 2. ), The laminate film 4 is pressed against the resistance heating element 2 from above and below and welded by rotating in the direction of winding up. The heating temperature of the laminated film 4 by the heating rollers 510 and 510 is in the range of 50 to 200 ° C, preferably in the range of 120 to 180 ° C.

Although the heating blower 513 can be provided in either the upper side or the lower side of the resistance heating body 2, as shown in FIG. 2, it arrange | positions two at the upper surface side and the lower surface side of the resistance heating body 2, The resistance heating element 2 may be heated on both upper and lower sides. By doing in this way, both the upper and lower sides of the resistive heating element of the comparatively thick plate exceeding 100 micrometers can be heated uniformly.

The heating temperature of the resistance heating element 2 by the heating blower 513 is about the same as or slightly higher than the heating temperature of the laminate film 4 by the heating rollers 510 and 510, specifically, 50 ° C. It is good to set it in the range of -200 degreeC, Preferably it is in the range of 140 degreeC-200 degreeC.

As such, the setting of the heating temperature of the resistance heating element 2 to a temperature higher than the heating temperature of the laminate film 4 is to take into account the difference in shrinkage between the two. That is, after the laminate film 4 is welded to the resistance heating element 2 by passing through the heating rollers 510 and 510, the shrinkage rate of the laminate film 4 due to cooling and the shrinkage rate of the resistance heating element 2 are close to wrinkles. This is to prevent the occurrence of. In general, the temperature of the laminate film 4 is slower than that of the resistance heating element 2 formed of stainless tape, and the thermal shrinkage is also large. Therefore, the temperature of the resistive heating element 2 is made higher than that of the laminated film 4, and both shrinkage ratios until the adhesive material applied to the surface of the laminated film 4 reaches the temperature range where it is solidified Try to get as close as possible. By doing in this way, wrinkles can be prevented from occurring in the laminated film 4 in the process of cooling.

When the laminate film 4 is welded, the spray position of the warm air by the heating blower 513 is placed at the inlet of the heating rollers 510 and 510 as much as possible so that the surface temperature of the resistance heating element 2 is as close as possible to this temperature. It is good to be close. In addition, in consideration of the temperature drop during the movement of the resistance heating element 2 from the injection position of the warm air to the position where the laminate film 4 is welded, the resistance heating element 2 at a temperature slightly higher than the above-mentioned 140 to 200 degreeC. It is good to set the heating temperature.

In addition, what is necessary is just to arrange | position the shielding plates 514 and 514 as shown by the virtual line in FIG. 2 in the vicinity of the entrance of the heating rollers 510 and 510. FIG. By doing in this way, the warm air blown out from the heating blower 513 can be efficiently collected by the resistance heating element 2 in the vicinity of the inlet, and further, the warm air flowing through the heating rollers 510 and 510 is prevented and the laminated film 4 is prevented. This can be prevented from being heated more than necessary, which is advantageous.

In addition, although not specifically shown, the cutter which cut | disconnects the laminate film 4 can be provided in the vicinity of the exit of the heating rollers 510 and 510. FIG. The cutter can be provided with a heater so that the cut portions of the upper and lower laminate films 4 and 4 can be heated and welded at a high temperature after cutting. Thus, by welding the upper and lower laminate films 4 and 4 after cutting, storage of the next resistance heating element 2 becomes easy.

Of course, instead of installing the cutter, the operator can be configured to cut the laminate film 4 by hand.

In addition, although the operator can carry out the conveyance of the resistance heating element 2 according to the loading table 515 and the export table 516 manually, a conveyance roller etc. are installed and the resistance heating element 2 is automatically sent at a predetermined speed. You can do that.

[2nd Embodiment of Laminating Device]

Fig. 3 is a view for explaining a second embodiment of the laminating device, and schematically shows the configuration of its main part. 3, the same code | symbol is attached | subjected to the same part and the same member as the lamination apparatus of FIG. 2, and detailed description is abbreviate | omitted.

In this embodiment, the heating heater 523 is provided in the vicinity of the inlet of the heating roller 510 instead of the heating blower. The heating heater 523 can be provided on both the upper and lower sides of the resistance heating element 2 so that the resistance heating element 2 can be heated on both the upper and lower sides, and may be provided on either side. A plurality of heating heaters 523 can be arranged on the upstream side of the heating roller 510 so that the resistance heating element 2 can be gradually heated to a predetermined temperature.

Further, a plurality of slow cooling heaters 524 are disposed near the outlets of the heating rollers 510 and 510 on the outlet side of the heating rollers 510 and 510.

The slow cooling heater 524 is for gradually cooling the laminate film 4 and the resistance heating element 2 to a temperature at which the adhesive material is solidified, whereby prevention of wrinkles or the like can be expected.

As the slow cooling heater 524, a known one such as a nichrome wire heater or a ceramic heater can be used.

In addition, a heating blower may be used instead of the slow cooling heater 524. In this case, the shielding member 514 as shown in FIG. 2 may be provided on the outlet side of the heating rollers 510 and 510.

[Description of Manufacturing Method]

Next, the manufacturing method of the surface heating element of this invention is demonstrated, referring FIG. 4 and FIG.

4 is a diagram showing a first embodiment of the method for producing a planar heating element.

As shown in FIGS. 2 and 3, one end of the long stainless tape 21 is connected to the short stainless tape 22 in advance, and the opaque member 3 is attached thereto.

In this state, the long stainless tape 21 heated to a predetermined temperature by a heating blower or the like is inserted between the heating rollers 510 and 510, and one end of the long stainless tape 21 is laminated with the laminated film 4 heated to the predetermined temperature. We weld from wealth.

In the welding of the laminate film 4 of this first step, the short stainless tape 22 is not connected to the other end of the long stainless tape 21. Instead of the short stainless tape 22, a peeling member 7 having good peelability with the laminate film 4 is attached to the other end. In this case, the edge part of the peeling member 7 is made to protrude a fixed length from the other end part of the elongate stainless tape 21 (refer FIG. 4A).

In this state, the long stainless tape 21 is sent between the heating rollers 510 and 510 so that the laminate film 4 is coated at one end and the other end.

Thereafter, the other end of the laminate film 4 is cut with a cutter, the laminate film 4 is peeled off from the resistance heating element 2 at the place where the peeling member 7 is located, and returned to one end to expose the peeling member 7. (See FIG. 4B).

Next, the peeling member 7 is peeled off from the other end of the long stainless tape 21, and the short stainless tape 22 is connected to the other end of the long stainless tape 21 by spot welding or the like (see FIG. 4C). . The other end of the long stainless tape 21 and the short stainless tape 22 are covered with an opaque member 3 such as a nonwoven fabric (see FIG. 4D). Thereafter, the laminated film 4, which has been returned to one end, is coated on the other end and welded (see FIG. 4D).

In this case, the other end of the resistance heating element 2 may be partially passed through the heating rollers 510 and 510 to weld the laminate film 4, and the laminate film 4 may be heated by separate heating means. It can be made to weld to the resistance heating body 2.

The planar heating element 1 is formed in the above procedure.

It is a figure which shows 2nd Embodiment of the manufacturing method of a surface heating element.

In this embodiment, the resistance heating body 2 is completed in advance, and the laminate film 4 is covered and welded.

Specifically, the short stainless tape 22 is connected to both ends of the long stainless tape 21, and one end of the long stainless tape 21 and the short stainless tape 22 at the one end thereof are opaque members 3 such as a nonwoven fabric. )).

On the other hand, the other end of the long stainless tape 21 and the short stainless tape 22 at the other end are coated with a resin or cloth opaque member 3 'having good peelability with the laminate film 4.

As this opaque member 3 ', the thing of the same material as the peeling member 7 (refer FIG. 4) demonstrated in 1st Embodiment of a manufacturing method can be used.

The opaque member 3 'at the other end is longer than the normal length of the opaque member 3 to protrude from the other end of the long stainless tape 21. As shown in FIG. In this state, the laminate film 4 is coated on the resistance heating element 2.

After coating, the other end of the laminate film 4 is cut by the cutter 8 together with the opaque member 3 '(see Fig. 5A).

Thereafter, the wrinkles and bubbles sent from one end of the resistance heating element 2 are opened at the other end of the open end (see Fig. 5B). Then, a part of the laminate film 4 is peeled off from the resistance heating element 2 at the other end and returned to one end side. In addition, the other end of the opaque member 3 'is cut again by the cutter 8, and is formed in the normal length as an opaque member (refer FIG. 5C).

Next, on both surfaces of the opaque member 3 ', the laminate film 4 and the opaque member 3' are coated with an adhesive 9 having good weldability (see FIG. 5D). Application | coating of this adhesive material 9 can be performed manually by an operator, and can be made to be performed automatically using the application | coating roller which apply | coated the adhesive material to one surface.

Thereafter, the laminated film 4 returned to one end side is covered with the opaque member 3 'and welded.

The planar heating element 1 is formed in the above procedure.

Next, an embodiment of the planar heating element panel using the planar heating element will be described with reference to FIG. 6.

6 is an exploded perspective view of the planar heating element panel of this embodiment.

In the planar heating element panel 10 of this embodiment, the metal sheet 11 which has substantially the same size as the planar heating element 1 is provided between the planar heating element 1 and the heat insulating material 12.

The metal sheet 11 may be formed of a metal having excellent thermal conductivity, but is preferably an aluminum sheet formed of aluminum from the viewpoint of material cost and ease of formation. In addition, it is preferable that the sheet thickness of this aluminum sheet shall be 0.05 mm-about 1 mm.

According to the planar heating element panel 10, heat generated in the planar heating element 1 is spread over almost the entire planar heating element panel 10 through the metal sheet 11 having excellent thermal conductivity. Therefore, the whole surface heating element panel 11 can be heated to a substantially uniform temperature, without nonuniformity.

Although preferred embodiment of this invention was described, this invention is not limited at all by the said embodiment.

For example, in the above embodiment, the laminate film 4 is described as using a transparent one, but the laminate film 4 may be opaque or translucent, and may also be colored or colorless.

In addition, although the joint part of the long stainless tape 21 and the short stainless tape 22 was covered and covered with the opaque member 3, it demonstrated, but the opaque member 3 can not be provided in particular.

In addition, in the above description, the laminate film is coated while conveying the resistance heating element in the horizontal direction, but it can be configured to cover the laminate film while conveying the resistance heating element in the vertical direction (preferably from the upward direction to the downward direction). .

In addition, heating of the resistance heating element 2 etc. by a heating blower can be performed automatically, and an operator can perform it manually.

Since this invention is comprised as mentioned above, it is hard to produce a deformation | transformation, torsion, folding, etc., and even if it is long and light area, the surface heating element which does not generate a wave and a wrinkle can be obtained. Further, even when partially bent in accordance with the shape of the installation portion for installing the planar heating element, wrinkles are less likely to occur in the folded portion, and the influence on the heat generation performance can be reduced.

In addition, it is good to simply make improvements to the current state of the laminating device, and to laminate the laminate film on the resistance heating element uniformly and without wrinkles, so that a high-quality planar heating element excellent in appearance and thermal efficiency can be manufactured at low cost. do.

Claims (16)

An end of the long stainless tape is connected to the short stainless tape for connection to form a resistance heating element, the outside of the resistance heating element is covered with a resin film, and power is supplied from the terminal portion provided on the long stainless tape or the short stainless tape. In the planar heating element which generates heat by the resistance heating element, And the stainless tape is formed of austenitic stainless steel or precipitation hardening stainless steel. The method of claim 1, And the austenitic stainless steel is a spring stainless steel having a composition of 17Cr-7Ni or 18Cr-8Ni, or the precipitation hardening stainless steel is a spring stainless steel having a composition of 17Cr-7Ni-1Al. The method according to claim 1 or 2, An adhesive strength between the resin film and the resistance heating element is 15 Kg peel strength or more characterized in that the planar heating element. The method according to claim 1 or 2, An end face portion of the long stainless tape, to which the short stainless tape is bonded, is coated with an opaque member, and the resin film is coated thereon. The method according to claim 1 or 2, The planar heating element which is characterized in that the plate thickness of the long stainless tape and the short stainless tape is 70 μm to 250 μm. The method according to claim 1 or 2, A planar heating element, which is formed by bending a portion of the resistance heating element in advance in accordance with the shape of the installation portion of the planar heating element. The planar heating element panel using the planar heating element according to claim 1 or 2, wherein the planar heating element, the metal sheet and the heat insulating material are laminated in this order. The method of claim 7, wherein And the metal sheet is an aluminum sheet having a sheet thickness of 0.05 mm to 1 mm. The end of the long stainless tape is connected to the short stainless tape for connection to form a resistance heating element, and the outside of the resistance heating element is covered with a resin film to supply power from the terminal portion provided on the long stainless tape or the short stainless tape. In the manufacturing method of the surface heating element which heats the said resistance heating element, The long stainless tape and the short stainless tape were formed of spring stainless steel having a composition of 17Cr-7Ni, 18Cr-8Ni, or 17Cr-7Ni-1Al, Preparing a first heating means for heating the resistance heating element to at least one surface side and heating the resistance heating element to a first predetermined temperature, and second heating means for heating the resin film to a second predetermined temperature; , The resistance heating element is heated to the first temperature by the first heating means, and then the resin film heated to the second temperature by the second heating means is brought into close contact with the surface of the resistance heating element to provide the resistance. A method for producing a planar heating element, wherein the resin film is welded to a heating element. The method of claim 9, The second heating means is disposed on both sides of the resistance heating element, and is a heating roller that heats the resin film to the preset second temperature, wherein the first heating means is near the heating roller, and the heating roller It is arrange | positioned at the inlet side which inserts the said resistance heating element between, Immediately after heating the resistance heating element to the first temperature, the resistance heating element is inserted between the heating rollers to weld the resin film heated at the second temperature to both sides of the resistance heating element. Method for producing a planar heating element. The method of claim 10, The first heating means is a heating blower, and sends warm air blown out from the heating blower to the inlet of the heating roller, A shielding member is prepared between the heating blower and the heating roller, and guides the warm air flowing toward the heating roller side by the shielding member from the vicinity of the inlet to the resistance heating element, and further, the warm air of the heating blower causes the heating roller. The said resin film was not heated, The manufacturing method of the surface heating element characterized by the above-mentioned. The method according to claim 9 or 10, The first heating means is disposed on both sides of the resistance heating element, and the resistance heating element is heated to the first temperature on both sides thereof. The method according to claim 9 or 10, The slow cooling means for adjusting the cooling rate of the said resin film and the said resistance heating body was provided in the exit side of the said heating roller, The manufacturing method of the surface heating element characterized by the above-mentioned. The method according to claim 9 or 10, The said 1st temperature is 50 degreeC-200 degreeC, and said 2nd temperature is 50 degreeC-200 degreeC, The manufacturing method of the surface heating element characterized by the above-mentioned. The method according to claim 9 or 10, While connecting the short stainless tape to one end of the long stainless tape, attaching a peeling member to the other end of the long stainless tape, After coating the resin film on the one end side to the long stainless tape, the resin film is partially peeled off at the other end to which the peeling member is attached. The peeling member is detached from the long stainless tape, and the short stainless tape is connected to the other end of the long stainless tape. The said resin film was welded to the said other end, The manufacturing method of the surface heating element characterized by the above-mentioned. The method according to claim 9 or 10, The short heating stainless tape is connected to both ends of the long stainless tape, and one end of the long stainless tape to which the short stainless tape is joined is covered with an opaque member, and the other end is covered with an opaque peeling member so that the resistance heating element is coated. Forming, After coating the resin film on the one end side to the resistance heating element, the resin film is partially peeled off at the other end where the peeling member is attached. While partially cutting off the peeling member of the other end, and applying an adhesive to adhere to the resin film on the surface of the peeling member, The said resin film was welded to the said other end, The manufacturing method of the surface heating element characterized by the above-mentioned.