JPH0587885U - Sheet heating element - Google Patents

Abstract

(57) [Summary] [Structure] The heat-resistant sheet 1 has strip electrodes 3 connected to the resistance heating wires 2 fixed on both sides of the heat-resistant sheet 1.
In a sheet heating element having upper and lower surfaces thereof covered with a laminate film 5, a strip electrode 3 is sewn and fixed to a heat resistant sheet in a non-adhesive state. [Effect] It is possible to provide a planar heating element which is excellent in heat conduction efficiency without being deformed due to expansion and contraction of the strip electrode.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a sheet heating element. More specifically, the present invention relates to an electric heating type sheet heating element useful for a floor heating system of a house or a wall heating system.

[0002]

[Prior Art]

 2. Description of the Related Art Conventionally, an electric heating type sheet heating element has been used for a panel heater that constitutes a floor heating system of a house or the like. For example, as shown in FIG. 5, this sheet heating element has a resistance heating wire (a) such as a nichrome wire patterned on a heat-resistant sheet (a) such as kraft paper or cloth and fixed by adhering or sewing. Furthermore, a strip electrode (c) such as a copper plate that conducts electricity to this resistance heating wire (a) is temporarily adhered to both side edges of the heat-resistant sheet (a), and these are laminated from both upper and lower sides with a laminated film (d) such as polyethylene. It has a fixed structure.

[0003]

[Problems to be solved by the device]

 However, in the case of the conventional planar heating element (e) having the structure as illustrated in FIG. 5, the upper and lower surfaces of the strip electrode (c) are uneven as shown in the side sectional view of FIG. Since they are bonded and fixed to the laminated film (d) and the heat-resistant sheet (b) respectively, when the strip-shaped electrode (c) expands and contracts due to the heat of the resistance heating wire (a), the laminated film ( Due to the presence of d) and the heat-resistant sheet (a), its free expansion and contraction can be prevented.

Therefore, for example, as shown in FIG. 7, the sheet heating element (e) is warped to concentrate stress on a part of the strip electrode (c), or as shown in FIG. 8, the sheet heating element (e). (E) There was a problem that the whole was deformed into a wavy state. In particular, when the planar heat generating element (e) is deformed into a corrugated shape, if it is brought into close contact with a heat equalizing material such as a metal plate, a gap is generated as shown in FIG. It also causes inconveniences such as a marked decrease in

The present invention has been made in view of the circumstances as described above, and it is possible to eliminate the drawbacks of the conventional planar heating element and to flexibly expand and contract the strip electrodes independently to transform the entire structure. It is intended to provide a sheet heating element that is difficult to do.

[0006]

[Means for Solving the Problems]

 This invention solves the above problems by providing strip electrodes on both side edges of the heat-resistant sheet, which are connected to the resistance heating wires fixed to the heat-resistant sheet, and the upper and lower surfaces of these electrodes are covered with a laminate film. A planar heating element comprising a strip-shaped electrode sewn and fixed to a heat-resistant sheet in a non-adhesive state.

[0007]

[Action]

 In the planar heating element of the present invention, the strip-shaped electrode connected to the resistance heating wire is not fixed to the heat-resistant sheet and the laminated film by adhesion as in the conventional case, but is sewn to the heat-resistant sheet with a thread, and the upper and lower surfaces It is covered with a laminated film from. Therefore, the strip electrode can freely expand and contract between the heat-resistant sheet and the thread, so that stress is not concentrated on a part and the planar heating element is not deformed.

[0008]

【Example】

 Hereinafter, embodiments will be shown with reference to the accompanying drawings to explain the present invention in more detail. FIG. 1 is an exploded perspective view illustrating a planar heating element of the present invention. For example, in this sheet heating element, a resistance heating wire (2) such as a nichrome wire is pattern-wired on a heat-resistant sheet (1) made of kraft paper or cloth and fixed by bonding or sewing. Strip-shaped electrodes (3) such as a copper plate for energizing 2) are arranged on both side edges of the heat resistant sheet (1). Further, in the case of this invention, the upper and lower surfaces of both sides are sewn with the thread (4) without temporarily bonding the strip electrode (3) to the heat resistant sheet (1), and the like. It is covered with the laminated film (5).

FIG. 2 is a sectional view of an essential part of the sheet heating element of the present invention manufactured as described above. As illustrated in FIG. 2, the strip electrode (3) is wrapped between the heat resistant sheet (1) and the thread (4), and the heat resistant sheet (1), the resistance heating wire (2), and the thread (4). ) Is covered and fixed by the laminate film (5), and the strip electrode (3) is in a non-adhesive fixed state on both upper and lower surfaces thereof. Therefore, as shown in the perspective view of the main part in FIG. 3, the strip electrode (3) can freely expand and contract between the heat resistant sheet (1) and the thread (4).

Therefore, since the strip electrode (3) is not deformed by expansion and contraction and the planar heating element itself always maintains a flat shape, as shown in the side sectional view of FIG. Even when the is arranged on the heat equalizing material (6) such as a metal plate, there is no gap and the heat conduction efficiency is good. Of course, the present invention is not limited to the above examples, and it goes without saying that various aspects are possible in the detailed configuration and the like.

[0011]

[Effect of the device]

 As described in detail above, according to the present invention, there is provided a planar heating element having excellent heat conduction efficiency without deformation due to expansion and contraction of the strip electrode.

[Brief description of drawings]

FIG. 1 is an exploded perspective view illustrating the structure of a planar heating element of the present invention.

FIG. 2 is a cross-sectional view of a main part of the planar heating element illustrated in FIG.

FIG. 3 is a perspective view illustrating an arrangement state of strip electrodes in the planar heating element of the present invention.

FIG. 4 is a side sectional view illustrating an installed state of the sheet heating element of the present invention.

FIG. 5 is an exploded perspective view illustrating the structure of a conventional sheet heating element.

FIG. 6 is a side sectional view of the planar heating element illustrated in FIG.

7 is a side cross-sectional view illustrating a deformed state of the planar heating element of FIG.

FIG. 8 is a perspective view illustrating another modified state of the sheet heating element of FIG.

FIG. 9 is a side view illustrating an installed state of a deformed sheet heating element.

[Explanation of symbols]

 1 Heat-resistant sheet 2 Resistance heating wire 3 Strip electrode 4 Thread 5 Laminated film 6 Soaking material

Claims (1)

[Scope of utility model registration request] 1. A planar heating element comprising strip-shaped electrodes connected to resistance heating wires fixed to a heat-resistant sheet on both side edges of the heat-resistant sheet and having upper and lower surfaces thereof covered with a laminate film. A sheet heating element, wherein the strip electrode is sewn and fixed to a heat resistant sheet in a non-adhesive state.