JPH04130676U - sheet heating element - Google Patents

Abstract

(57) [Summary] [Purpose] To provide excellent workability when installing on roofs, etc., and to ensure safety. [Structure] A planar heating element consisting of a sheet resistor equipped with an electrode for applying current and an insulating covering formed to cover the outer surface of the sheet resistor. - A loop-shaped ground wire is provided in an integrated structure.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a planar heating element used for snow melting sheets and the like.

0002

[Conventional technology]

Conventionally, the plan view of Fig. 2 and the plan view of Fig. 3 have been used as snow melting sheets for melting snow accumulated on roofs. There is one using a planar heating element 1 as shown in the AA cross-sectional view.

0003 This planar heating element 1 is made of resistive materials such as metal foil, carbon fiber, carbon paint, etc. Therefore, a sheet resistor 2 is formed, and a pair of electrodes are further provided at the ends of the sheet resistor 2 in the width direction. 3 is formed, its outer surface is covered with an insulating coating 4, and an electric current is applied to the electrode 3. The sheet resistor 2 is configured to generate heat by applying a voltage through the source line 9. It will be done.

0004 When such a planar heating element 1 is installed on a roof as a snow melting sheet, wind and rain, small movements If the insulation performance of the insulation sheath 4 is deteriorated or damaged by objects, etc., it may cause an electric leakage accident or a feeling of discomfort. Electrical accidents may occur and safety may be compromised. Therefore, for example, a sheet heating element is placed on top of the roof tiles. When laying a roof tile 5 and a sheet heating element 1, as shown in FIG. A ground wire 6 is installed. Of course, the roof tiles and the wooden structure beneath them In some cases, a planar heating element is installed between the roof tiles and the wooden structure. Lay a ground wire between the building and the structure.

[0005]

[Problem that the idea aims to solve]

However, since the planar heating element 1 and the ground wire 6 have separate structures, the ground Two steps of work are required: laying the wire 6 and laying the sheet heating element 1. However, there are problems in that workability is poor and work costs are high.

[0006] In addition, since it is inevitable that a gap will occur between the sheet heating element 1 and the ground wire 6, , it becomes easy for dust and dirt to gradually accumulate in this gap, and if dust etc. accumulates, the air If the function as a wire deteriorates or expires, safety cannot be ensured. There is a problem.

[0007] This invention was devised to solve the above problems, and its technical challenges The problem is that it not only has excellent workability when laying it on roofs, etc., but also ensures safety. An object of the present invention is to provide a planar heating element that can be used for heating.

[0008]

[Means to solve the problem]

The planar heating element according to the present invention has a tape-shaped ground wire integrated on one side of the insulation coating. It was set up in the structure.

[0009]

[Effect]

According to the above configuration, the ground wire has an integrated structure, so the installation work can be completed in one step. do. Further, there is no possibility that dust or the like will accumulate between the planar heating element and the ground wire.

0010

【Example】

FIG. 1 is a cross-sectional view showing one embodiment of the present invention, which is equipped with an electrode 3 for applying a current. a sheet resistor 2 and an insulating covering formed to cover the outer surface of the sheet resistor 2. In the planar heating element 1 consisting of 4, a tape-shaped earth The wire 7 is attached to the integral structure by adhesive or other means.

The ground wire 7 is made of annealed copper material and has a cross-sectional area of 2 mm ² or more in accordance with the safety standards for electrical appliances. The width is selected according to the width of the planar heating element 1, but if the planar heating element 1 is formed to be 150 mm in accordance with the width of the roof tile, it is formed to be 150 mm or less. Further, considering flexibility and mechanical strength, the appropriate thickness is about 0.05 mm to 0.2 mm.

0012 Therefore, it is preferable to provide the ground wire 7 integrally with the sheet heating element 1 in this way. As a result, the work of laying the roof on the roof can be completed in one step, improving work efficiency and reducing the work time. Costs are significantly reduced.

[0013] In addition, there is no risk of dust etc. accumulating between the sheet heating element 1 and the ground wire 7. The function as a ground wire will not deteriorate or become invalid, and safety will not be compromised. and improve reliability.

[0014]

[Effect of the idea]

As described above, in the planar heating element of the present invention, the planar heating element is equipped with a Consists of a resistor and an insulating coating formed to cover the outer surface of the sheet resistor. In a planar heating element, a tape-shaped ground wire is integrated on one side of the insulation coating. This feature not only improves work efficiency when installing on roofs, but also significantly reduces work costs. will be reduced to

[0015] In addition, there is no risk of dust accumulating between the sheet heating element and the ground wire. Safety can be ensured and reliability can be improved.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional configuration diagram of a planar heating element of the present invention.

FIG. 2 is a plan configuration diagram of a conventional sheet heating element.

FIG. 3 is a sectional view taken along line AA in FIG. 2;

FIG. 4 is an explanatory diagram of a conventional planar heating element installed on a roof.

[Explanation of symbols]

1 Planar heating element 2-plane resistor 3 electrode 4 Insulating coating 5 Roof tiles 6,7 Ground wire

Claims (1)

[Scope of utility model registration request] 1. A planar heating element comprising a sheet resistor provided with an electrode for applying a current, and an insulating covering formed to cover the outer surface of the sheet resistor, wherein one side of the insulating covering A planar heating element with a tape-shaped ground wire integrated into the side.