JP2002106872A - Electric floor heating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric floor heating device having a lead cable provided with an insulating layer which is hardly deteriorated in a condition where a heat insulating material is formed by foaming resin between joists, and hardly causes bad environmental influences when disposed of and incinerated. SOLUTION: The electric floor heating device 1 comprises a panel member 2 provided with a plurality of joists 8 arranged substantially parallel to each other with an interval therebetween, on one surface of a plate 7 with respect to a perpendicular Z, a lamination of a heating member 3, a heat storage material 5 and a heat insulating material 6 arranged in this order on one side in the perpendicular Z between the joists 8, and a flexible lead cable 4 of which one end 4a is electrically connected to the heating member 3 and the other end 4b is arranged on one side of the plate 7 in the perpendicular Z through the heat insulating material 6. The lead cable 4 has a heat insulating layer 10 formed with a nonhalogen base heat resistant material.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric floor heating device.

[0002]

2. Description of the Related Art Floor heating devices are generally classified into a hot water floor heating device and an electric floor heating device.
From the viewpoint of ease of maintenance, the electric floor heating device is excellent. Conventionally known general electric floor heating device, between each joist of a panel member provided with a plurality of joists at intervals on the surface of one side in the thickness direction of the plate-shaped body,
It has a structure in which a heat generating member and a heat storage material are laminated, and a back plate is provided via a plate-like heat insulating material. Such an electric floor heating device is arranged such that the other in the thickness direction of the plate-shaped body is located on the floor surface side, the temperature of the heat generating member is raised by energizing the heat generating member, the surroundings are warmed by the heat, and the panel member is heated. The entire room is heated by appropriately warming the floor surface.

In recent years, instead of the above-mentioned method using a plate-like heat insulating material, an unfoamed heat insulating material stock solution containing at least a foaming resin (base material) and a foaming agent is directly injected between each joist of a panel member. A method of forming a heat insulating material by foaming a foamed resin between the joists has been proposed. According to this method, a heat insulating material can be formed by absorbing unevenness of a heat storage material, a heat generating member, and the like between the joists, and an integrated structure in which the heat insulating material is inserted between the joists can be realized. Examples of the foamed resin used for forming the heat insulating material include polyurethane, polystyrene, polyethylene, and phenol resin.

In an electric floor heating apparatus, a heat generating member is used as a heat source. However, a lead cable for electrically connecting the heat generating member and a power source is required. Conventionally, as a material for forming this lead cable, JIS C 3
306, a single-core vinyl cord (HVSF), a two-ply vinyl cord (VTF), a two-ply two-ply vinyl cord (HVTF),
A device having an insulating layer made of polyvinyl chloride called a vinyl code, such as a vinyl flat code (VFF) and a two-class vinyl flat code (HVFF), has been used. In the lead cable, the wiring to the power supply is generally arranged on the lower side of the edge (one side in the thickness direction of the plate-like body) from the viewpoint of the strength and smoothness. Therefore, the lead cable is provided such that one end is electrically connected to the heat generating member and the other end is disposed on one side in the thickness direction of the plate-shaped body through the heat insulating material.

[0005]

In the above-described method of forming a heat insulating material by foaming a foamed resin between the joists, for example, when polyurethane is used as the foamed resin, the temperature rises to 100 ° C. or more. As described above, in the electric floor heating device, since the lead cable must be provided through the heat insulating material, one end of the lead cable is electrically connected in advance to the heat generating member, and the other end is connected to one side in the thickness direction. The unfoamed heat insulating material stock solution is injected in a state where it is arranged so as to be released. As described above, in the electric floor heating device, the lead cable must be exposed to a high temperature for several tens of minutes when the heat insulating material is formed. Therefore, the insulating layer of the lead cable is required to have heat resistance. The above-mentioned vinyl cord has no major problem from the viewpoint of heat resistance,
Chlorine contained in the insulating layer may react with amine as an additive in the unfoamed heat-insulating stock solution, which may cause deterioration of the insulating layer. It is not preferable to use a lead cable whose insulation has been deteriorated, since problems such as defective insulation, short circuit, and electric leakage occur.

[0006] In recent years, it has been formed of a material that takes into consideration the impact on the environment and suppresses the generation of toxic gas and smoke during incineration.
Eco-cables that do not elute harmful substances even when reclaimed are increasing. Vinyl cords have been considered to be undesirable from the viewpoint of environmental problems such as the generation of dioxin and chlorine in polyvinyl chloride during disposal and incineration. From such a viewpoint, development of an electric floor heating device using a lead cable other than a vinyl cord is desired.

SUMMARY OF THE INVENTION An object of the present invention is to provide a lead cable which is hardly deteriorated even when a heat insulating material is formed by foaming a foamed resin between joists, has excellent chemical resistance, and is less likely to adversely affect the environment during disposal and incineration. An object of the present invention is to provide an electric floor heating device including:

[0008]

Means for Solving the Problems The present inventors have made intensive studies to solve the above-mentioned problems, and as a result, have completed the present invention. The present invention is as follows. (1) A panel member in which a plurality of joists are provided substantially in parallel at intervals on the surface on one side in the thickness direction of the plate-like body, and on the plate-like body in order between the joists toward one side in the thickness direction. The stacked heat generating member, the heat storage material, and the heat insulating material, one end of which is electrically connected to the heat generating member, and the other end of which is disposed on one side in the thickness direction of the plate-like body through the heat insulating material. An electric floor heating device comprising: a lead cable having flexibility; and a lead cable having an insulating layer formed of a halogen-free heat-resistant material. (2) The electric floor heating device according to the above (1), wherein the halogen-free heat-resistant material is a crosslinked polyethylene. (3) The above (1) or (2), wherein the heat insulating material is formed by foaming any foamed resin selected from polyurethane, polystyrene, polyethylene and phenolic resin between the joists. An electric floor heating device according to (1).

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail.
FIG. 1 is a simplified perspective view showing an electric floor heating device 1 according to a preferred example of the present invention, and FIG. 2 is a simplified sectional view of a lead cable 4 in the present invention. The electric floor heating device 1 basically includes a panel member 2 and a heating member 3.
, A lead cable 4, a heat storage material 5, and a heat insulating material 6. In FIG. 1, the heat insulating material 6 is partially cut away for convenience.

The panel member 2 according to the present invention comprises a plate-like member 7.
And a plurality of joists 8 provided substantially in parallel at an interval on one surface (one surface) on one side in the thickness direction Z of the plate-shaped body 7, and are widely used in the art. Can be suitably used. The plate-like body 7 is a rectangular flat plate-shaped member formed of, for example, a Lauan material, a Chinese material, or the like, and is realized by plywood or a particle board. The size of such a plate-shaped body 7 is appropriately selected according to the intended design of the electric floor heating device, and is not particularly limited.

The joist 8 is made of, for example, Lauan wood, Chinese wood, cedar, etc., and is realized by a rod-shaped member having a square cross section as shown in FIG. The size of such a joist 8 is appropriately selected according to the size of the plate-like body 7. The interval between the joists 8 is also appropriately selected according to the size of the plate-like body and the joists, and the number of joists. For example, as shown in FIG. 1, the panel member 2 is formed by joining four joists 8 to one surface in the thickness direction Z of the plate-like body 7 at substantially equal intervals in parallel (for example, using nails or wood screws). Is realized.

The heat generating member 3, the heat storage material 5, and the heat insulating material 6
It is laminated between the joists 8 on the plate-like body 7 in order toward one side in the thickness direction Z. The heating member 3 in the present invention is not particularly limited as long as it can generate heat by energization, and various conventionally known linear heaters and sheet heaters can be used. Among them, a planar heater is preferable in that heat can be uniformly transferred to the entire surface of the heat storage material 5. In the embodiment shown in FIG. 1, the heat generating member 3 is configured such that an electric heating cord is arranged in a substantially wave-like shape on a metal foil formed in a substantially rectangular shape by, for example, aluminum foil and pressed to obtain a constant heat generation amount. Is realized. The electric heating cord is provided with a heat-generating conductor commonly called a so-called heating wire having high electric resistance, and a coating layer covering the same. The exothermic conductor
For example, it is formed of a copper-nickel alloy, a nickel-chromium alloy, or the like. Further, the coating layer has, for example, butyl rubber, ethylene-propylene-diene rubber having electrical insulation properties,
It is formed of a material such as cross-linked polyethylene. In the present invention, the heat generating member 3 may be integrally provided with a thermostat, a thermal fuse, or the like.

The lead cable 4 of the present invention comprises the heat generating member 3.
And has a flexibility, and includes, for example, a substantially cylindrical conductor 9 and a cylindrical insulating layer 10 covering the conductor 9 as shown in FIG. . In the embodiment shown in FIG. 2, the lead cable 4 has a conductor 9 having a diameter of, for example, 1 mm to 5 mm, and a thickness of the insulating layer 10 of, for example, 0.5 mm to 3 mm.

The material for forming the conductor 9 is not particularly limited as long as it has conductivity.
For example, it is preferably formed of a metal material generally used conventionally, such as copper, aluminum, and tin, and particularly preferably formed of copper in terms of versatility and high conductivity.

The insulating layer 10 according to the present invention is formed of a non-halogen type, in other words, a heat-resistant material containing no halogen atoms. Examples of such heat-resistant materials include cross-linked polyethylene, polyester, polycarbonate, polyamide, epoxy, thermoplastic polyurethane, silicon rubber, and styrene block copolymer. The term “heat resistance” in the present specification refers to JIS
The maximum allowable temperature measured according to the heating test specified in C 3005 is 60 ° C. or higher, preferably 90 ° C. or higher. In the present invention, a material that can impart flexibility suitable for use as a lead cable at the time of forming the insulating layer 10 is used. Among the above examples, crosslinked polyethylene, particularly crosslinked low density polyethylene, is preferable.

The cross-linked polyethylene is obtained by cross-linking polyethylene to form molecules into a three-dimensional network. Compared with the case where an insulating layer is formed of polyethylene, the heat softening property is greatly improved, and the heat resistance is excellent. Can be realized. The crosslinked polyethylene can be suitably obtained by adding an organic peroxide as a crosslinking agent to the resin composition and subjecting the polyethylene to crosslinking, as is conventionally known.
As the organic peroxide, those which do not decompose at the plasticization temperature of polyethylene are used, and examples thereof include dicumyl peroxide and 2,5-dimethyl-2,5-di (t-butyl peroxide) hexine-3. Can be By exposing the composition containing such an organic peroxide to high temperature and high pressure simultaneously with or after the molding process, the organic peroxide is decomposed to generate radicals, and the radicals cause a cross-linking reaction between molecules. Let go.

The amount of the organic peroxide in the resin composition is preferably from 0.1 to 10 parts by weight, more preferably from 0.2 to 8 parts by weight, based on 100 parts by weight of polyethylene. If the compounding amount of the organic peroxide is less than 0.1 part by weight, heat resistance tends to be inferior and the insulating layer tends to be undesirably deformed. When the amount of the organic peroxide exceeds 10 parts by weight, the insulating layer becomes too hard,
However, it is not preferable because there is a problem that it becomes difficult to handle.

If necessary, the resin composition may contain an antioxidant, a higher fatty acid or a metal salt thereof (eg, zinc stearate), a lubricant, a higher fatty acid amide (eg, triallyl isocyanurate or acrylate). ), Processing aids such as organic and inorganic pigments, fillers such as silica and clay, amide-based and hydrazide-based copper damage inhibitors, benzophenone-based and benzoin-based ultraviolet inhibitors, and multifunctional crosslinking. Auxiliaries and the like may be added.

Any antioxidant can be used without particular limitation as long as it is used for an insulator of a cable. Such antioxidants include, for example, 4,4′-thiobis (6-tert-butyl-3-methylphenol),
2,2'-methylenebis (4-ethyl-6-tert-
Hindered phenol type antioxidants such as butylphenol), thiopropionic acid type antioxidants and thioether type antioxidants. The amount of the antioxidant is preferably 0.1 to 10 parts by weight, more preferably 0.2 to 8 parts by weight, based on 100 parts by weight of polyethylene.

The resin composition may be mixed by a conventionally known method. The method of forming the above-mentioned insulating layer 10 made of crosslinked polyethylene is not particularly limited, and examples thereof include a conventionally known extrusion coating method.

A cross-linked polyethylene may be obtained by a conventionally known radiation irradiation method or silane cross-linking. The radiation irradiation method is a method of using a γ-ray or an electron beam as a radiation source and irradiating them to a polyethylene molded article. As a result, radicals are generated in the polyethylene molecules, and the radicals are coupled with each other to form crosslinks between the molecules. The silane crosslinking is a method in which a vinylsilane compound is subjected to a graft addition reaction to polyethylene, a silanol condensation catalyst is added to the graftmer, molded, and then exposed to a water atmosphere. As a result, the alkoxysilanes at the graft ends are dealcoholized after hydrolysis, and crosslinks between molecules are formed, whereby a crosslinked polyethylene can be obtained.

The lead cable 4 of the present invention preferably further comprises a substantially cylindrical sheath layer covering the insulating layer 10. The sheath layer is provided for the purpose of maintaining the insulating property of the insulating layer 10 for a long time, and is provided with water resistance,
It is made of a material that is excellent in chemical resistance, weather resistance, aging resistance, abrasion resistance, and bending resistance, and is chemically stable for a long time.

In the present invention, as shown in FIG. 1, two lead cables 4 are used for one heat generating member 3, and one end 4a is electrically connected to the heat generating member 3 and the other end is connected to the other end. The portion 4b passes through the heat insulating material 6 and is electrically connected to the built-in connector 12. The built-in connectors 12 are provided on one side in the thickness direction Z on the side of the joist 8 so as to be arranged one by one between the joists 8. The built-in connector 12 has a concave terminal on one side in the thickness direction Z into which the terminal 14 of the connector portion 13 a of the external wiring 13 is inserted, and is arranged so that the concave terminal is exposed from the heat insulating material 6.

The external wiring 13 has the same number of connector portions 13a as the built-in connector 12, and is electrically connected to the built-in connector 12 by inserting the terminals 14 of the connector portion 13a into the concave terminals. Between the connector portions 13a,
The connection portion 13b is electrically connected, and an end of the connection portion 13b is connected to a power supply (not shown) or an external wiring (not shown) of another electric floor heating device. Further, the external wiring 13 has a switch (not shown) for switching whether or not power is supplied from a power supply. With such a structure, when the electric floor heating device 1 is to be operated, if the switch is turned on, the external wiring 13 and the built-in connector 1 are turned on.
Electricity is supplied to the heat generating member 3 from a power source via the power supply 2. The power supply is a normal commercial power supply (frequency is 50 Hz
Or 60 Hz) is used.

The lead cable used in the present invention is not limited to the shape shown in FIG. 2 as long as the insulating layer covering the conductor is formed of the above-mentioned non-halogen heat-resistant material. Various conventionally known shapes can be adopted.

As the heat storage material 5 in the present invention, a material in which various known latent heat storage agents are sealed in a bag body is suitably used. As the latent heat storage agent, for example,
Paraffin wax such as normal paraffin,
Per 100 parts by weight of waxes such as higher alcohols,
Organic polymers 1 such as styrene-based thermoplastic elastomers such as styrene-ethylene-propylene-styrene block copolymer and styrene-isoprene-styrene block copolymer, various olefin-based thermoplastic elastomers, and ethylene-vinyl acetate copolymer Examples of the composition include a composition in which 100 parts by weight of paraffins are mixed with 5 to 30 parts by weight of a hydrocarbon organic polymer by mechanical means. As the bag for enclosing the latent heat storage agent, polyethylene terephthalate-
A metal laminate film such as an aluminum-plastic film such as an aluminum-polypropylene composite is exemplified.

By realizing the heat storage material 5 in the above-described form, the deterioration of the latent heat storage agent due to contact with air or water can be prevented, and the ease of handling during installation and removal can be improved. In the present invention, it is more preferable to employ a vacuum encapsulation method when enclosing the latent heat storage agent in the bag. Thereby, the heat storage material 5 with further improved heat conductivity can be realized.

The heat insulating material 6 according to the present invention is provided so that when the electric floor heating device 1 is used, the heat generated from the heat generating member 3 is directed to the lower side of the edge (namely, the thickness direction Z of the plate-shaped body 7). One side) is prevented, heat loss is reduced, and heat is efficiently directed to the floor side (that is, the other side in the thickness direction Z of the plate-shaped body 7). Insulation material 6
Is filled in the space defined by one surface of each joist 8 and the plate-shaped body 7 in the thickness direction Z, excluding the heat generating member 3, the heat storage material 5, and the like. This heat insulating material 6
The unfoamed heat insulating material stock solution is injected into each of the above space portions, and a back plate (not shown) that covers each joist 8 after the injection is covered from one side in the thickness direction Z to cover the panel member 2 and the back plate. Is heated and pressed, so that the unfoamed heat insulating material stock solution is foamed and formed in the space.

The unfoamed heat insulating material stock solution contains at least a foamed resin (base material) and a foaming agent. Examples of the foamed resin include polyurethane, polystyrene, polyethylene, and phenolic resin. Among them, polyurethane having good moldability and the lowest thermal conductivity, in other words, the highest heat insulation performance is particularly preferable. A conventionally known foaming agent can be used.

The heat-generating member 3 and the heat storage material 5 are laminated, and the unfoamed heat insulating material stock solution is injected between the joists 8 after the lead cables 4 are arranged as described above. After the injection, the back plate is put on the electric floor heating device 1 in the above-mentioned state from the other side in the thickness direction Z of the plate member 7, and the panel member 2 and the back plate are heat-pressed. As a result, the foamed resin foams, and the space between the back plate and the panel member 2 is filled except for the heat generating member 3 and the heat storage material 5.

As described above, the lead cable 4 of the electric floor heating device 1 according to the present invention has one end 4 a of the heating member 3.
And the other end 4b is disposed so as to pass through the heat insulating material 6 and be disposed on one side in the thickness direction Z of the plate-shaped body 7. The lead cable 4 has an insulating layer 10 made of a halogen-free heat-resistant material, preferably a crosslinked polyethylene. In the present invention, the heat insulating material is formed by foaming the foamed resin between the joists, and the lead cable is exposed to a temperature environment of 100 ° C. or more for several tens of minutes during the formation. 10 is less likely to cause insulation deterioration. Furthermore, even when polyurethane is used as the foaming resin, since there is no halogen atom in the insulating layer, the amine, which is an additive in the unfoamed heat-insulating stock solution, does not react with chlorine in the insulating layer as in the past. This does not cause insulation deterioration of the insulating layer. As described above, in the present invention, even if the heat insulating material is formed by foaming between the joists, the insulation of the lead cable does not deteriorate and the insulation deterioration and the short circuit caused by the deterioration of the insulation of the lead cable as in the related art occur.
No problems such as electric leakage occur. Therefore, in the present invention,
A high-quality electric floor heating device using an excellent heat insulating material that does not cause the above problems can be realized.

Also, in the present invention, unlike the conventional configuration in which a vinyl cord is used as a lead cable, no dioxin or halogen gas is generated during disposal or incineration. Therefore, labor for sorting in consideration of environmental problems at the time of disposal or incineration can be saved.

Further, in the present invention, when a crosslinked polyethylene, especially a crosslinked low-density polyethylene, is used among the non-halogen heat-resistant materials, the dielectric strength, the volume resistivity and the dielectric loss tangent and the dielectric constant are very small. Thus, the insulating layer 10 having excellent characteristics can be realized. In this way, polyethylene has an increased heat deformation temperature due to cross-linking, and has a creep resistance, stress crack resistance, chemical resistance,
There is an advantage that the mechanical strength and the like are improved and the electrical characteristics are not much different from those before crosslinking. Furthermore, the lead cable 4 using an insulating layer made of cross-linked polyethylene has a small allowable bending radius, so that it is easy to bend, and the terminal and direct connection work become easy.

As shown in FIG. 1, the electric floor heating device of the present invention comprises a heat equalizing member 1 between a plate 7 and a heat generating member 3.
5 is preferably implemented. The heat equalizing member 15 is a member provided to substantially uniformly transmit the heat generated from the heat generating member 3 to the floor surface, and is realized in a sheet shape having good heat conductivity. As such a heat equalizing member 15, for example, a metal laminated sheet obtained by laminating a metal such as aluminum is preferably used, and an aluminum laminated sheet is particularly preferable.

FIG. 3 is a simplified perspective view showing an electric floor heating device 21 according to another preferred embodiment of the present invention. The electric floor heating device 21 shown in FIG. 3 is the same as the electric floor heating device 1 shown in FIG. 1 except that the form of wiring is different, and the portions having the same configuration are denoted by the same reference numerals. The description is omitted. The lead cable 22 of the electric floor heating device 21 shown in FIG. 3 has one end 22 a electrically connected to the heat generating member 3, the other end 22 b passing through the heat insulating material 6, and the thickness direction of the heat insulating material 6. Z is arranged to be pulled out from one side. The other end 22b is electrically connected to a connector 23, and each connector 23 is appropriately connected to an external wiring (not shown). External wiring is shown in FIG.
The power supply (not shown) between the connectors 23,
It is provided so as to be appropriately electrically connected to a connector of another electric floor heating device.

[0036]

The present invention will be described in detail with reference to the following examples, but the present invention is not limited to the following examples. Example 1 Four cedar-made joists 8 were joined to a plate-shaped body 7 made of Lauan,
The panel member 2 according to the present invention was formed. The above joist 8
The one in which the built-in connector 12 was appropriately provided in advance so as to be arranged one by one between the joists 8 was used. Each joist 8
The heat generating member 3 was placed between the heat equalizing members 15 (aluminum laminated sheet). The heat generating member 3 was obtained by arranging an electric heating cord in a planar waveform on a substantially rectangular aluminum foil to which one end of each of the two lead cables 4 was electrically connected and crimped. On such a heat generating member 3, a heat storage material 5 (latent heat storage agent: paraffin-based, bag: composite material of polyethylene terephthalate-aluminum-polypropylene) was laminated. The lead cable 4 comprises a copper conductor 9 and an insulating layer 1 made of cross-linked low-density polyethylene.
One coated with 0 was used. The conductor 9 of the lead cable 4 had a number of wires / wire diameter of 30 wires / 0.18 mm, and the thickness of the insulating layer 10 was 1.0 mm. The other end of the lead cable 4 is connected to the built-in connector 12.
To each other. Thus, the heat equalizing member 1
5, between the joists 8 in which the heat generating member 3 and the heat storage material 5 are sequentially laminated, an unfoamed heat-insulating material stock solution containing polyurethane as a foaming resin is injected and subjected to heat compression at a maximum temperature of 120 ° C. The heat insulating material 6 was formed by foaming the space therebetween.
Thus, the electric floor heating device of the embodiment shown in FIG. 1 was manufactured.

Example 2 An electric floor heating device was manufactured in the same manner as in Example 1 except that the maximum temperature during foaming of the foamed resin was 170 ° C. to form a heat insulating material.

Comparative Example 1 An electric floor heating device was manufactured in the same manner as in Example 2 except that a vinyl cord was used as a lead cable.

With respect to each of the electric floor heating devices obtained in Examples 1 and 2 and Comparative Example 1, conduction was first confirmed between the ends of the lead cables, and those having a conductor resistance of 508 Ω to 618 Ω were evaluated as ○, Those with less than 508Ω and those with more than 618Ω were evaluated as x. In such a test, imitating repetitive energization in consideration of actual use was performed, in which one cycle of leaving for 16 hours after energizing for eight hours was performed, and after performing ten cycles, it was determined whether there was an abnormality. ○, if there was no abnormality
The ones with abnormalities were marked as x. After that, disassemble each electric floor heating device and take out the lead cable respectively,
The insulation resistance of each lead cable was measured. When the rate of decrease in the insulation resistance before the heat insulating material was measured beforehand was less than 5%, it was evaluated as ○, and when it was 5% or more, it was evaluated as x. Table 1 shows the results.

[0040]

[Table 1]

[0041]

As is apparent from the above description, according to the present invention, even when a foamed resin is foamed between the joists to form a heat insulating material, the heat resistant material is hardly deteriorated, the chemical resistance is excellent, and the waste material is excellent. It is possible to provide an electric floor heating device including a lead cable that does not adversely affect the environment during incineration.

[Brief description of the drawings]

FIG. 1 is a simplified perspective view showing an electric floor heating device 1 according to a preferred example of the present invention.

FIG. 2 is a simplified sectional view of a lead cable 4 according to the present invention.

FIG. 3 shows another preferred example of the electric floor heating device 2 according to the present invention.
FIG. 2 is a simplified perspective view showing 1.

[Explanation of symbols]

 1, 21 Electric floor heating device 2 Panel member 3 Heating member 4 Lead cable 5 Heat storage material 6 Insulation material 7 Plate-shaped body 8 Joist

Claims (3)

[Claims] 1. A panel member in which a plurality of joists are provided substantially in parallel at intervals on a surface on one side in the thickness direction of the plate members, and the plate members are arranged between the joists toward one side in the thickness direction in order. A heat generating member, a heat storage material, and a heat insulating material laminated thereon, one end of which is electrically connected to the heat generating member, and the other end of which is disposed on one side in the thickness direction of the plate-like body through the heat insulating material; Electrical floor heating apparatus comprising: a flexible lead cable provided as described above, wherein the lead cable has an insulating layer formed of a halogen-free heat-resistant material. apparatus. 2. The electric floor heating device according to claim 1, wherein the non-halogen heat-resistant material is a cross-linked polyethylene. 3. The heat insulating material is formed by foaming any foamed resin selected from polyurethane, polystyrene, polyethylene and phenolic resin between the joists. An electric floor heating device according to claim 1.