JPS62211889A - Electric carpet - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to an electric carpet incorporating a film-like planar heating element and a cord-like temperature detection wire.

(Background technology) Conventionally, i'! ! Film-like planar heating elements and cord-shaped heating wires are known as heating elements that can be heated by air. Among these, the former type of sheet heating element has a heating circuit pattern that can be easily formed by etching or other means on metal foil, as shown in Japanese Patent Publication No. 60-21470. Multiple heating circuits can be easily obtained, and it is currently used in many wattage-switchable electric carpets. In this case, the planar heating element itself is constructed by, for example, forming a heating circuit on one side of a thermosensitive resin film, and forming a special electrode for temperature detection on the other side by etching, etc. It also serves as a temperature detection electrode to detect changes in impedance of the thermosensitive resin film, thereby controlling the supply of electricity to the heat generating circuit.

However, in recent years, due to the demand for energy conservation, there has been a desire to provide electric carpets with products that can switch the wattage more widely than before, and can be switched on and off for each small area. The number tends to increase. Under these circumstances, the conventional method of forming a dedicated electrode for temperature detection on a sheet heating element is not appropriate;
It is necessary to form this dedicated electrode separately from the sheet heating element to take up a large space for the heating circuit in the sheet heating element.

For this reason, as shown in FIG.
3 is formed separately from the planar heating element.
For example, various methods have been proposed, such as U.S. Pat. That is,
In the figure, 21 is a planar heating element, 21a is an insulating layer such as polyester, 21b is a heating conductor foil constituting a heating circuit, 22 is a thermal adhesive layer, 23 is a cord-shaped temperature detection wire, 24
25 indicates the back material, and 25 indicates the surface material. This electric carpet has 259 surface materials and 21 planar heating elements. Temperature detection line 2
3 and the back material 24 are sequentially laminated to provide a heat-sealing layer 22 between each member, and then integrated by hot pressing.
Due to the upward convex deformation, the surface is not flat, making it uncomfortable to sit on and having an unfavorable appearance.

Further, such deformation inevitably causes deformation of the planar heating element 21, and there is a drawback that the heating conductor foil 21b is more likely to break when subjected to repeated external forces than in the past.

Furthermore, the insulating layer provided at the outermost part of the temperature detection line 23 is mainly made of PVC material, and the plastic material contained in this PVC material directly affects the adjacent planar heating element 21, causing the material to deteriorate. This caused deterioration and reduced adhesive strength, which shortened the lifespan of electric carpets.

(Objective of the Invention) The present invention has been proposed in view of the above points, and its purpose is to improve sitting comfort and appearance by eliminating convex deformation of the surface, and to prevent deformation of the sheet heating element. An object of the present invention is to provide an electric carpet that has a long service life by preventing wire breakage and a decrease in adhesive strength.

(Disclosure of the Invention) The present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of the present invention. In FIG. 1, A is a planar heating element, and this planar heating element A is made of an inner laminate layer 1 as a heat-sensitive substrate and a heat-generating layer formed by etching or the like. It comprises a conductor foil 2, insulating films 3a and 3b as intermediate materials with cushioning properties disposed on both sides thereof, and heat-fusible film layers 4a and 4b formed on both sides thereof, and is flat as a whole. It is composed of

Then, on the lower surface of this planar heating element A, a temperature detection line B having a structure as shown in FIG. has been done.

That is, the temperature detection wire B includes a core wire 5, an inner-wound electrode 6, a polymer temperature-sensitive body 7, an outer-wound electrode 8, an insulating layer 9, and a heat-fusible coating layer IO.

As shown in FIG. 3, these planar heating elements A and temperature detection lines B are covered on the front and back with a surface material C made of needle punch felt or the like and a back material.
The entire structure is integrated by thermocompression bonding.

In addition, in FIG. 3, Ila is the base of the surface material C, llb
also indicates hairy feet. Further, FIG. 4 is a perspective view of the entire electric carpet, and in the figure, 12 indicates a temperature controller section, and 13 indicates a power cord.

In the present invention configured in this way, the temperature detection line B is superposed in the thickness direction of the flat planar heating element A, and the thickness and diameter of the temperature detection line B influences the surface material C side. Since this is prevented by the insulating film 3b etc., there is no risk of convex deformation of the surface material C or the planar heating element A itself.
Temperature detection line B due to the cushioning properties of the insulating film 3b
Since it is possible to absorb a part of the thickness of the sheet heating element A, deformation of the sheet heating element A can be further prevented.

Moreover, since the heat-fusible film layer 4b and the heat-fusible coating layer 10 are double-existed between the planar heating element A side and the temperature sensing iB side, the insulating layer 9 made of PVC material is There is no risk that the agent will impair the adhesiveness of the inner laminate layer 1, the insulating films 3a, 3b, etc. Furthermore, the high temperature portion of the heating conductor foil 2 etc. of the planar heating element A and the temperature detection wire B are connected to an insulating film 3b.
Since they are isolated by the heat-fusible film layer 4b, the heat-fusible coating layer 10, etc., there is no fear that the insulating layer 9 of the temperature detection line B and the polymer thermosensitive body 7 will be deteriorated by heat.

(Effects of the Invention) As described above, according to the present invention, there is provided a flat heating element in which a heat-generating conductor foil is arranged on a heat-sensitive substrate, and a cord arranged in an overlapping manner in the thickness direction of this heating element. Since it is equipped with a shaped temperature detection wire, it is possible to improve the sitting comfort and appearance by eliminating convex deformation of the surface, and also prevents deformation of the one-sided heating element to prevent disconnection of the heating conductor foil, and has adhesive strength. This has the effect of making it possible to maintain the temperature of the product, thereby extending the life of the product.

[Brief explanation of drawings]

Fig. 1 is a sectional view of the planar heating element, Fig. 2 is an explanatory diagram of the temperature detection line, Fig. 3 is a sectional view of the main part of the electric carpet according to the present invention, Fig. 4 is a perspective view, and Fig. 5 is a sectional view of a main part showing a conventional example. A... Planar heating element B... Temperature detection line 1...
・Inner laminate layer 2... Heat generating conductor foil Figure 1a Figure 2 Figure 3

Claims (3)

[Claims] (1) Features include a flat heating element in which a heat-generating conductor foil is arranged on a heat-sensitive substrate, and a cord-shaped temperature detection line arranged overlappingly in the thickness direction of the heating element. Electric carpet. (2) The electric carpet according to claim 1, wherein the temperature detection wire is arranged through a cushioning intermediate material provided on the planar heating element. (3) The electric carpet according to claim 1, wherein a temperature detection line is provided through a heat-fusible material provided on the planar heating element.