JP2002106871A - Floor heating structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a floor heating structure which can be readily and directly constructed dispensing with a special floor material and floor backing material while exerting heating and sound insulation effects without losing strength or the like. SOLUTION: A floor heating structure is constituted such that an electric sheet heater having a pair of leads is disposed between the floor material and the floor backing material and that the floor surface is heated with the application of current on the leads of the sheet heater. A sound insulation material is provided under the sheet heater through a cushioned sheet, while flat wires are connected to the leads of the sheet heater, respectively, and the leads of the sheet heater are energized through these flat wires.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating floor structure which is easy to construct, can be constructed without the need for a special floor material and flooring material, and has both a heating effect and a sound insulation effect.

[0002]

2. Description of the Related Art Conventionally, in this type of floor heating structure, a sheet heater having a thickness of less than 1 mm has been put into practical use for a planar heater. Not much progress, about 3-6mm
There were only thick ones. In order to obtain a floor heating structure having a uniform floor surface level by using such a planar heater, it is necessary to use a special tool for a floor base material such as a plywood discarded at a construction site with a depth of 6 mm.
A groove having a width of about 70 mm and a width of about 70 mm was carved, and the connection wiring and the connector portion were stored in this groove. However, this method has the following disadvantages. First, not only does it take time to carve a groove in the flooring material, but when the floor surface is a horizontal structure as a structure, the cross-sectional area of the flooring material decreases by the amount of the groove and the strength decreases Resulting in. Secondly, carving a groove in the floor base material thins the sections on the upper and lower floors, and may not satisfy the requirements for fire prevention performance. Another method of obtaining a floor heating structure having a uniform floor level using the above-described planar heater is to use a floor material having a similar groove on the back surface side of the floor material, and connect the connection wiring and the connector portion to the groove. Is a method of storing
The need for specially shaped flooring during construction
That makes it less versatile. On the other hand, as for a heating floor structure having both a heating effect and a sound insulation effect, there has not been proposed any construction that is simple in construction and can withstand practical use.

[0003]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a simple construction, a direct construction without a special floor material and a floor base material, and a heating effect and a sound insulation effect. It is an object of the present invention to provide a heating floor structure which does not sacrifice strength and the like.

[0004]

As a result of intensive studies by the present inventors, the above object of the present invention has been industrially advantageously achieved by the present invention having the following constitution.

[1] A heating floor structure in which an electric planar heater having a pair of conductive wires is disposed between a floor material and a floor base material, and the conductive wires of the planar heater are energized to warm the floor surface. , A sound insulating material is provided below the planar heater via a cushioning sheet, and flat wires are connected to the respective conductors of the planar heater, and current is supplied to the conductors of the planar heater via these flat wires. Heating floor structure characterized by doing.

[2] The heating floor structure according to the above [1], wherein a plurality of planar heaters are employed, and the flat wires connected to the planar heaters are connected by eyelets.

[3] The heating floor structure according to [1] or [2], wherein the thickness of the flat wire is 0.7 mm or less.

[4] The heating floor structure according to any one of [1] to [3], wherein a PTC conductive heater is used as the planar heater.

[5] The heating floor structure according to any one of claims 1 to 4, wherein the sound insulating material has a soaking effect.

The most important feature of the present invention is that a flat wire is connected to each conductor of the planar heater, and a current is supplied to the conductor of the planar heater via these flat wires. It is extremely useful because it achieves a uniform floor level, combined with the effect of uniform thickness by using a cushioning sheet, and also has a sound insulating effect by using sound insulating materials. The point is that the heating floor structure is provided as an easy construction.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, the sheet heater is not particularly limited, and any conventionally known sheet heater can be used, but a PTC conductive sheet heater is preferably used. The PTC conductivity means a self-temperature control characteristic in which the electric resistance increases when a large current passes, and the current and, consequently, the calorific value decrease. By using such a sheet heater, there is no danger that the temperature of the sheet heater will rise to a temperature exceeding the practical or safety upper limit, and unlike a sheet heater using a nichrome wire, complicated overheating prevention is prevented. No mechanism is required.

The PTC conductive planar heater includes:
Any known one can be used, and as a typical example,
Some are made by impregnating a PTC conductive paint into a fiber fabric, for example, a woven fabric, followed by drying and heating steps. It is preferable to use a fiber cloth that contains a conductive wire in advance. As such a fiber fabric, cotton, polyester fiber, polyamide fiber, acrylic fiber, vinylon fiber, or the like, or a spun yarn containing at least one of these,
Or a fiber woven fabric in which fiber yarns composed of mixed fiber yarns are arranged in a warp and / or a weft, and a copper wire or a good conductive filament in place of the copper wire is arranged at a predetermined interval in a part of the warp and / or the weft No. As the heating method, for example, far-infrared irradiation, microwave irradiation, dielectric heating and the like can be used. However, the heating method is not limited thereto, and any method capable of appropriately controlling the temperature may be used. It is preferable to use a method in which the divergence rate of the solvent cannot be different between the surface and the inside of the coating film.

As the PTC conductive coating used at this time, those described in US Pat. No. 5,556,576 are typically used. That is, the conductive paint is manufactured by the following sequence of steps. (1) An aromatic solvent is placed in a heated stirring vessel and heated to a temperature of 40 to 60 ° C. (2) A substrate forming substance selected from a thermoplastic resin, an uncured thermosetting resin and an elastomer is added in an amount of 25 to 40% by weight of the conductive substance in a later step. (3) 25 to 40% by weight of the conductive powder to be added
Of paraffin and stirring is continued until all solids are dissolved. (4) Add conductive fine powder selected from graphite, carbon black, metal powder and the like, and stir until a smooth paste is formed. (5) Kneading the paste until a substantially uniform dispersion of the conductive fine powder is obtained.

A PTC conductive sheet heating element obtained by impregnating a yarn with a conductive paint can also be used. The yarn is impregnated with a conductive paint to give PTC conductivity, and the yarn is knitted and woven to form a face cloth, which is used. In this case, any material can be selected for the conductive wire used for the electrode, and it can be inserted into any shape at the time of knitting. Further, when a voltage is applied in the direction of the weft yarn of the sheet heating element, almost no voltage is applied to the warp yarn, and the heat generation function is not exhibited. In this case, using a yarn impregnated with conductive paint on the face cloth and knitting it in combination with a yarn not impregnated with conductive paint, only the yarn in the direction to which voltage is applied can be provided with a heat generating function. Thus, paint can be saved. In this case, the strength of the heating element can be enhanced by using a cable in which a fiber having high tensile strength such as nylon is twisted with the yarn impregnated with the conductive paint.

FIG. 1 shows a typical planar heater of the present invention. As shown in FIG. 1, a pair of copper wires 2 having a diameter of 0.2 mm are arranged in a planar heating element base material 1 having PTC conductivity in parallel with each other. On the other hand, each copper wire is connected via a conductive adhesive 3 to two flat wires 4 arranged in the width direction of the sheet heating element base material. A round hole 5 is formed at the end of the flat wire 4. The round hole 5 is for connection. The size of the planar heater is arbitrary according to the purpose of use, for example,
If it is for heating an 8-tatami flooring floor, it is preferably about 235 mm to 250 mm in width and about 2650 mm in height.
The degree is preferred. For kitchen and toilet use, it is preferable that the width is the same and the height is about 600 mm. The planar heating element substrate is usually covered with an insulating laminated film, and a polyester film such as a polyethylene terephthalate film is preferably used as the laminated film. It is preferable that the two flat wires are similarly covered with the insulating laminate film 6.

In the present invention, a flat wire means a copper plate having a predetermined thickness (for example, 0.2 mm) provided with an insulating coating. The thickness of the flat wire is preferably 0.7 mm or less. 0.7
This is because if the thickness exceeds mm, the above-described function is not easily exerted. Conversely, if the flat wire is too thin, it will be necessary to increase the width of the flat wire in order to secure the desired electric capacity.
The flat wire preferably has a thickness of 0.35 mm or more.
The width of the thin copper plate is determined by the desired current carrying capacity, but is preferably about 12 mm. In the present invention, in the case where the floor surface level cannot be equalized, it can be easily coped with by partially removing the cushioning sheet.

In the present invention, it is preferable that the thickness of the portion where the flat wire is not incorporated is 3 mm or less. If the thickness exceeds 3 mm, the handleability at the time of construction is deteriorated, and generally, it becomes too hard.

In the present invention, the size of the sheet heater is usually as described above, but in order to obtain a sheet heater having a larger area, a plurality of PTC conductive sheet heaters as units are used. A method of connecting the flat wires of the plurality of planar heaters with eyelets is preferably used. In the case of the sheet heater shown in FIG. 1, the eyelet fittings are connected in a state where the round holes are overlapped with each other.

In the present invention, any known sound insulating material can be used. However, in order to minimize the temperature unevenness of the floor surface, a material having both a soaking effect, that is, a large heat conductivity is used. Those in which iron powder is mixed into asphalt are particularly preferable because the amount of heat dissipated is large, and in a mode in which a plurality of sheet heaters are used, a decrease in the temperature of the joint portions of the sheet heaters can be considerably prevented.

In the present invention, as the cushioning sheet to be used, a foaming plastic sheet is generally used, and specific examples thereof include a polypropylene foaming sheet, a polyethylene foaming sheet and a polyurethane foaming sheet. It is preferably used.

[0021]

EXAMPLES Hereinafter, the present invention will be described more specifically with reference to examples, but the present invention is not limited to these examples.

Example 1 3.5 kg of graphite (SP-20, manufactured by Nippon Graphite Co., Ltd.) and 1.5 kg of acetylene black (Denka Black, manufactured by Denki Kagaku Co., Ltd.) were mixed with an ethylene / propylene / styrene copolymer (manufactured by Shell Co., Ltd.). Kraton G1701) 5 kg, polystyrene 1
kg, paraffin 4 kg, and MEK / xylene = 20
The mixture was added to a solution consisting of 15 kg of a / 80 mixed solvent to form a uniform paste, which was then diluted with 1.5 times the amount of xylene to prepare a coating liquid containing a heating material.

On the other hand, in a polyester / cotton blended yarn (20/2 m count) warped at an interval of about 1 mm, a surface of a 275 dtex / f polyester filament yarn having a width of about 0.3 mm Five covering yarns wound with copper foil are aligned, and five electrodes are arranged at intervals of about 25 cm. A polyester / cotton blended yarn (20/2 m count) is used as the weft and driven at intervals of about 1 mm. About 5 width
A 0-cm coarse woven fabric was formed, and the obtained woven fabric was immersed in the coating solution, squeezed lightly with a roll, and then dried by heating. Thus, a PTC conductive substrate having a planar heating function was obtained. This is shaped as shown in FIG.
mm, length 2650 mm).

As shown in FIG. 1, an end of the PTC conductive base material having the planar heating function has a thickness of 0.2 mm and a width of 1 mm.
After two sheets of a 2-mm copper plate coated with a synthetic resin insulating coating were provided in parallel, the entire surfaces were covered with a polyethylene terephthalate film. The obtained sheet heating element has extremely high flexibility and a thickness of 1.2 parts in which the copper plate is incorporated.
mm, the thickness of the part where this is not incorporated is 0.6 mm
It was a sheet-like material. This sheet is 400 w / m
2 outputs, including open and room temperature 20
A current of 200 V was applied under the condition of ° C., and after 30 minutes, 1 hour and 1 hour and 30 minutes, the surface of the sheet was measured. That is, it was found that this sheet had excellent PTC conductivity. Moreover, this sheet-shaped material had excellent shape stability and high strength.

FIG. 2 shows a typical construction example of the floor heating structure according to the present invention using the planar heater. In FIG.
A sheet heating element 12 is provided below the flooring 11 (floor material), and a sound insulating material 14 is provided below the sheet heating element 12 via a cushioning sheet 13. Since a plurality of planar heating elements are used, the aluminum tape 15 is used as a soaking material. Electricity is supplied through the flat wire 16. In addition, 17, 18,
19 and 20 are a particle board (floor base material), a floor temperature sensor, a controller and a wall, respectively.

[0026]

According to the present invention, since the conductive wires of the planar heater are energized via the flat wire, the thickness of the connecting wires and the connector portion can be reduced, and the thickness of the cushioning sheet can be reduced. Combined with the uniformity effect of the present invention, the floor level is made uniform, and the sound insulation effect is also achieved by using a sound insulation material, thereby providing a floor heating structure particularly useful for an apartment house.

[Brief description of the drawings]

FIG. 1 is a perspective view of a planar heater according to the present invention.

FIG. 2 is a perspective view of a construction example of a floor heating structure according to the present invention.

[Explanation of symbols]

 1: Sheet heating element base material 2: Copper wire 3: Conductive adhesive 4: Flat wire 5: Round hole 6: Laminated film 11: Flooring 12: Sheet heating element 13: Cushion sheet 14: Sound insulation material 15: Aluminum tape 16: Flat wire 17: Particle board 18: Floor temperature sensor 19: Controller 20: Wall

Claims (5)

[Claims] 1. A heating floor structure in which an electric planar heater having a pair of conductors is disposed between a floor material and a floor base material, and a current is supplied to the conductors of the planar heater to warm the floor. A sound insulating material is provided below the planar heater via a cushioning sheet, and flat wires are connected to the respective conductors of the planar heater, and power is supplied to the conductors of the planar heater via these flat wires. Heating floor structure characterized by doing so. 2. The heating floor structure according to claim 1, wherein a plurality of planar heaters are employed, and the flat wires connected to the planar heaters are connected to each other by eyelets. 3. The heating floor structure according to claim 1, wherein the thickness of the flat wire is 0.7 mm or less. 4. The heating floor structure according to claim 1, wherein a PTC conductive heater is used as the planar heater. 5. The heating floor structure according to claim 1, wherein the sound insulating material has a soaking effect.