JP2007071473A - Electric heating board for floor heating and floor heating system using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric heating board having high impact resistance and suitably combined with, in particular, a thin floor material. <P>SOLUTION: This electric heating board 23 has a frame material 22a, a beam member 22b and a heat insulating material 21 constituting a base portion, a sheet heating element 23 placed on an upper face of the base portion, and a reinforcement plate 25 placed on the sheet heating element. The reinforcement plate 25 protects the sheet heating element 23 from impact force transmitted through a floor finishing material placed on the electric heating board 23. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an electric floor heating system and an electric heating board used therefor, and more particularly, to an electric heating board structure suitable for combination with a thin floor material.

  A floor heating system is generally configured by laying a plurality of electric heating boards having heating elements on a floor base, and further laying a flooring (floor finishing material) thereon. An appropriate number of electric heating boards are electrically connected at the construction site according to the area of the room. Furthermore, a controller is fixed to the wall surface of the room, and power is supplied to the electric heating board from the distribution board of the building via the controller.

  As an electric heating board, the thing of the structure mentioned, for example in patent document 1 is known. The electric heating board disclosed in Patent Document 1 contains a heat insulating material and a planar heating element in a box-shaped frame body whose upper surface is opened, and further a heat-uniforming material made of a thin metal plate such as aluminum is provided thereon. It has the provided structure. One end of the electric heating board has a terminal electrically connected to the planar heating element, and the electric heating boards are connected to each other through this terminal.

Patent Document 2 discloses an electric heating board in which a decorative board serving as a flooring material is integrated. More specifically, it includes a decorative plate, a heat equalizing material laminated on the back surface of the decorative plate, and a substrate and a heating element provided on the back surface of the heat equalizing material. The substrate is divided and arranged so as to form a groove for accommodating the heating element and its wiring.
Utility Model Registration No. 3017312 Japanese Patent Laid-Open No. 11-131777

  However, since the electric heating board disclosed in Patent Document 2 has an integrated floor material, the user's choices such as color and material are limited. In order to satisfy the user's requirements for the color and material of flooring, it is necessary to prepare electric heating boards with various specifications that change not only the size but also the type of flooring. Becomes complicated.

  On the other hand, the electric heating board disclosed in Patent Document 1 does not cause the above-mentioned problem because the flooring may be used according to the user's preference. However, as the flooring material, a wooden material having a thickness of about 10 to 20 mm is generally used, and such a wooden flooring material is not very good in heat transfer. Therefore, considering the heat transfer efficiency of the electric heating board, the floor material is preferably as thin as possible. Actually, from the viewpoint of resource saving and environmental protection, a wooden floor material having a thickness of about 3 mm is sold. In addition, the use of a thin flooring can reduce the overall thickness including the electric heating board, and the electric heating board and a new one can be directly applied to the existing flooring without removing the existing flooring at the time of reform. There is also an advantage that even if the flooring is installed, no uncomfortable feeling is caused.

  However, when a thin floor material is used as the floor material laid on the electric heating board, a new problem arises. The electric heating board has a built-in heating element, and if a large impact force is applied, the heating element may be damaged. When a thick flooring was used, the impact force on the electric heating board due to falling objects or the like was the flooring itself acting as a buffer material to protect the electric heating board. However, when a thin flooring material is used, the flooring material cannot be required to provide a protection function of the electric heating board against impact force, so the electric heating board itself needs to ensure impact resistance.

  Furthermore, since the electric heating boards disclosed in Patent Documents 1 and 2 connect the electric heating boards to each other at the construction site, the installation work of the electric heating boards is complicated. This increases the construction cost of the floor heating equipment and lengthens the construction period, and is one of the factors that hinder the installation of the floor heating equipment during renovation.

  Therefore, a first object of the present invention is to provide an electric heating board for a floor heating system, which is suitable for combination with a floor material having high impact resistance and particularly thin.

  Furthermore, a second object of the present invention is to provide an electric heating board and a floor heating system that can be installed more easily in addition to the above object.

The electric heating board of the present invention is an electric heating board laid between the floor base and the floor finishing material,
A planar heating element with a heating resistor that generates heat when energized;
A reinforcing layer for protecting the heating resistor from an impact force applied via the floor finishing material, which is located on the floor finishing material side of the heating resistor.

Further, the floor heating system of the present invention includes at least one heater unit laid between the floor base and the floor finish material,
A controller for controlling the heater unit,
The heater unit is electrically connected in advance with a plurality of the electric heating boards of the present invention.

  In the present invention configured as described above, the electric heating board has a reinforcing layer for protecting the heating resistor from the impact force transmitted through the floor finishing material on the floor finishing material side of the heating resistor. Even when a thin material is used as the finishing material, the impact force due to falling objects or the like is alleviated by the reinforcing layer. In particular, in the floor heating system of the present invention, since a plurality of electric heating boards are electrically connected in advance, it is not necessary to connect the electric heating boards at the time of installing the heater unit. obtain.

  The reinforcing layer can be a metal plate or a resin plate disposed on the surface side of the planar heating element. The electric heating board may further include a heat insulating material and a frame member arranged so as to surround the outer periphery of the heat insulating material, and the planar heating element may be disposed on the heat insulating material and the frame member. In such a configuration, when the electric heating board is fixed to the floor finish with screws or nails, it is preferable that an insertion hole through which the screw or nail is inserted is provided in a portion of the reinforcing layer on the frame member.

  The reinforcing layer is not a member different from the planar heating element, but may be included in the planar heating element itself. In the case where the sheet heating element has a heating resistor and a fiber reinforced resin layer laminated on both sides in the thickness direction of the heating resistor, such a reinforcing layer is constituted by the fiber reinforced resin layer. be able to.

  Furthermore, in this invention, it can also be set as the structure by which the wiring for electrically connecting several electric heating boards is arrange | positioned on the back surface side of a planar heating element. In this case, connectors are provided at both ends of the wiring, and the wiring is arranged so that one connector is in a position overlapping the planar heating element and the other connector is in a position extending from the electric heating board. It is preferable that an opening is formed in a region facing one connector of a member on the floor finish material side of the wiring facing the connector, and a lid member is fitted into the opening. Thereby, when a malfunction occurs in the electric heating board, the electric heating board can be easily replaced.

  As described above, according to the present invention, since the electric heating board has the reinforcing layer, the impact force due to falling objects and the like is relieved by the reinforcing layer, and even when combined with a thin floor finish material, heat is generated. Damage to the resistor can be prevented. Furthermore, in the floor heating system of the present invention, the plurality of electric heating boards are electrically connected in advance, so that the installation work can be easily performed.

  Next, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a schematic perspective view of a floor heating system according to an embodiment of the present invention, which is partially cut away for easy understanding of the configuration.

  As shown in FIG. 1, the floor heating system 10 according to the present embodiment includes a heater unit 11 laid on the floor foundation 1 and a controller 30 that controls energization of the heater unit 11. In the present embodiment, two heater units 11 are provided, and each heater unit 11 can be energized and controlled independently.

  The floor foundation 1 is a portion on which the heater unit 11 is placed, and examples thereof include plywood, particle board, and concrete slab. Moreover, when installing the floor heating system 10 as a part of indoor renovation, the existing flooring itself can be used as the floor base 1 and the heater unit 11 can be placed directly on the existing flooring.

  The heater unit 11 has a plurality of electric heating boards 20 arranged adjacent to each other. Each electric heating board 20 has a heating resistor (not shown) that generates heat by supplying electric power, and a plurality of electric heating boards 20 are arranged in a row so that the heating resistors of each electric heating board 20 are electrically connected in parallel. Are connected in advance in a state of being arranged. One of the plurality of electric heating boards 20 constituting the heater unit 11 includes a temperature sensor (not shown). In each heater unit 11, a lead wire 14 for electrically connecting the heater unit 11 and the controller 30 is drawn out from one electric heating board 20. The electric heating board 20 with the built-in temperature sensor and the electric heating board 20 with the lead wire 14 drawn out may be the same or different.

  The lead wire 14 includes a power supply line for supplying power to the heating resistor, a ground line, and a sensor line for inputting and outputting signals to the temperature sensor. Each of these lines may be drawn out individually or may be drawn out as a single cable.

  The controller 30 is installed on the wall 2. The controller 30 is connected to the primary power supply line 15 from the distribution board and to the lead wire 14. 1 shows a state in which the controller 30 is provided with an opening in the wall 2 and the back surface is embedded in the opening, but a large opening for the controller 30 is provided in the wall 2. In such a case, the controller 30 may be attached to the surface of the wall 2. The lead wire 14 and the primary power supply line 15 pass through the back side of the wall 2. However, when the controller 30 is attached to the surface of the wall 2, they may be routed on the surface of the wall 2. When wiring such as the lead wire 14 and the primary power supply line 15 is routed on the surface of the wall 2, it is preferable in view of appearance that these wirings are flat cables.

  On the front surface of the controller 30, an operation unit having various switches such as a switch for turning on / off the power of the heater unit 11, a temperature setting switch, a timer setting switch, the room temperature, and the operation of the floor heating system 10 are provided. A display unit for displaying a mode or the like is provided as necessary. Further, the controller 30 incorporates a control circuit (not shown) that controls energization to the heater unit 11 according to a set temperature, a detection result of a temperature sensor provided in the heater unit 11, and the like. As described above, power is supplied to the controller 30 via the distribution board, and power supply from the controller 30 to the heater unit 11 and power supply to the heater unit 11 by the controller 30 can be controlled.

  The electric heating board 20 will be described in detail with reference to FIGS. 2 is a top view of the electric heating board shown in FIG. 1, FIG. 3 is a rear view of the electric heating board shown in FIG. 1, FIG. 4 is a cross-sectional view taken along line AA in FIG. 2, and FIG. FIG. FIG. 6 is a view in which the electric heating board shown in FIG. 1 is cut along a plane perpendicular to the thickness direction, and the cross section is viewed from the back side.

  The electric heating board 20 is configured in a rectangular shape in plan view, and as a framework member, a frame member 22a configured to surround the outer peripheral portion and a region surrounded by the frame member 22a are divided into two regions. And a beam member 22b arranged along the longitudinal direction of the electric heating board 20 at the intermediate portion in the width direction of the electric heating board 20. A heat insulating material 21 is arranged inside each of the two regions surrounded by the frame member 22a and the beam member 22b. That is, the outer periphery of the heat insulating material 21 is surrounded by the frame member 22a and the beam member 22b. Further, in the vicinity of one edge in the longitudinal direction of the electric heating board 20, there is a wiring path member 26 for passing the wiring 27 used to electrically connect the plurality of electric heating boards 20 along the width direction of the electric heating board 20. Are arranged.

  The upper surface of the base portion constituted by the frame member 22a, the beam member 22b, the heat insulating material 21, and the wiring path member 26 is covered with a planar heating element 23 including a heating resistor. The upper surface of the sheet heating element 23 is covered with a soaking material 24, and the upper surface of the soaking material 24 is covered with a reinforcing plate 25.

  As long as the frame member 22a and the beam member 22b are lightweight and can secure the mechanical strength necessary to support the planar heating element 23, the structures thereof are arbitrary, and each frame member 22a and beam member 22b are configured by a single member. Alternatively, it may be combined with a functional member such as a vibration-proof and sound-proof material (not shown). Further, the frame member 22a and / or the beam member 22b also has a function of securing an area for fixing the electric heating board 20 on the floor foundation 1 (see FIG. 1). The electric heating board 20 can be fixed to the floor base 1 by nailing, screwing, bonding, fitting, or the like, for example.

  For the frame member 22a and the beam member 22b, a light and strong material, for example, wood, plywood, lightweight plastic, or the like can be used. Further, by arranging the structure for supporting the planar heating element 23 in a frame shape in which the frame member 22a and the beam member 22b are combined, the weight of the entire electric heating board 20 is reduced. Deformation is suppressed, and the installation work of the electric heating board 20 is improved.

  The beam member 22b is not an essential component for the present invention. However, when the electric heating board 20 has a large area, the beam member 22b is provided so that the planar heating element 23 and the like disposed on the base portion have higher planarity. Can be secured and supported, and a region for fixing the electric heating board 20 on the floor foundation 1 can be favorably secured. The position and number of the beam members 22b are appropriately set according to the area of the electric heating board 20 and the like.

  The heat insulating material 21 is used to suppress the heat generated from the planar heating element 23 from being transmitted to the back surface side of the electric heating board 20 and to effectively transmit the heat toward the floor finishing material 12 (see FIG. 1). As the heat insulating material 21, a material that is lightweight and has a heat insulating effect and has heat resistance with respect to the normal use temperature of the electric heating board 20 is preferably used. Examples include foamed resins such as foamed polyurethane, foamed polyethylene and foamed polypropylene, wood fiber forming bodies such as hard wood fiber boards or lightweight wood fiber boards, felt mats made of synthetic fibers such as polyester fibers or polyether ketone fibers, etc. Is mentioned.

  The wiring path member 26 is made of a plate-like member, and has a plate-like shape so that a space for passing the wiring 27 through the width direction of the electric heating board 20, which is the direction in which the electric heating boards 20 are adjacent to each other, is formed. Ribs are integrally provided on the upper surface of the member. A space for routing the wiring 27 formed in the wiring path member 26 is provided with a surplus length storage portion 26 a that stores a surplus length portion of the wiring 27 when the electric heating board 20 is laid. Since the wiring path member 26 is disposed on the lower surface side of the planar heating element 23 similarly to the heat insulating material 21, the wiring path member 26 preferably has the same heat insulating performance as the heat insulating material 21. Therefore, the wiring path member 26 is preferably made of the same material as the heat insulating material 21.

  The wiring 27 includes a power line, a ground line, and a sensor line for supplying power to the planar heating element 23. The power supply line and the ground line branch in the middle of the wiring 27 and are connected to the planar heating element 23. In the case of the electric heating board 20 provided with the temperature sensor, the sensor line is connected to the temperature sensor. Connectors 28 a and 28 b are connected to both ends of the wiring 27. When the plurality of electric heating boards 20 are electrically connected, the wirings 27 are connected to each other through the connectors 28a and 28b. In the state of the heater unit 11 (see FIG. 1) in which the plurality of electric heating boards 20 are electrically connected, the wiring 27 of the electric heating board 20 located at the end is connected to the lead wire 14 (see FIG. 1). . In the wiring 27, one connector 28a is located in the wiring path member 26, is in a position overlapping the planar heating element 23, the heat equalizing material 24 and the reinforcing plate 25, and the other connector 28b is connected. The side is arranged to extend from the side of the electric heating board 20.

  The heat insulating material 21 and the wiring path member 26 are fixed to the frame member 22a and the beam member 22b by attaching adhesive tapes 19a to 19f from the back side of the electric heating board 20, as shown in FIG. it can. As the pressure-sensitive adhesive tapes 19a to 19f, heat-resistant polyester pressure-sensitive adhesive tapes can be used.

  The planar heating element 23 is not particularly limited, but from the standpoint of durability and far-infrared radiation efficiency, a carbon fiber heating resistor can be preferably used, and is composed of a frame member 22a, a heat insulating material 21, and the like. The base member is fixed with a double-sided adhesive tape or an adhesive. Moreover, in order to suppress the thickness of the electric heating board 20, the thickness of the planar heating element 23 is preferably 2 mm or less, more preferably 0.8 mm or less. As such a planar heating element 23, for example, as disclosed in JP-A-8-207191, the conductive material is formed at both ends of a network structure formed by joining intersections of non-conductive fibers and conductive fibers. Examples thereof include a fiber reinforced resin molded article formed by connecting fibers and electrodes and then embedding them in a resin or laminating fiber reinforced prepreg sheets.

  An example of the planar heating element 23 having the above-described configuration will be described with reference to a cross-sectional view of FIG.

  In FIG. 7, the plurality of conductive fibers 41 are arranged in parallel with a space therebetween. As the conductive fiber 41, a conductive fiber made of a resin in which metal particles such as carbon black or copper powder are dispersed, polyacetylene, polypyrrole, polypyridine itself or a conductive polymer fiber doped with a metal, iron, copper, Examples thereof include metal fibers such as nickel and chromium, and metal fibers and carbon fibers made from alloys such as stainless steel, Ni—Cr, Ni—Cu—Fe, and Ni—Cr. Among these, carbon fibers excellent in lightness, flexibility, corrosion resistance, and tensile strength can be preferably used.

  Non-conductive fibers 42 are laminated on both sides of the conductive fibers 41 with the conductive fibers 41 in between. The non-electric fibers 42 are arranged in a direction different from the conductive fibers 41. As the non-conductive fiber 42, glass fiber, aramid fiber, ceramic fiber, alumina fiber, or the like can be used.

  At least one of the conductive fiber 41 and the non-conductive fiber 42 is mixed with a thermoplastic resin or a thermoplastic resin fiber at an arbitrary ratio. The conductive fibers 41 and the non-conductive fibers 42 are joined at the intersections by heat fusion through the thermoplastic resin or thermoplastic resin fibers, thereby forming a network structure. Electrodes (not shown) are provided at both ends in the arrangement direction of the conductive fibers 41 of the network structure. Each electrode is connected to a power line and a ground line branched from the wiring 27 (see FIG. 6).

  Fiber reinforced prepregs 43 are laminated on both sides in the thickness direction of the network structure. Further, a film 44 made of polyethylene terephthalate (PET) is laminated on the surface of the fiber reinforced prepreg 43 as an insulating layer.

  The reinforcing fibers contained in the fiber reinforced prepreg 43 are preferably composed of non-conductive fibers. The form of the reinforcing fiber may be any form such as a unidirectional material, a woven fabric, and a non-woven fabric. The thickness of the fiber reinforced prepreg 43 is preferably 0.05 mm to 5 mm, more preferably 0.05 mm to 0.5 mm, from the viewpoint of easy heat transfer. Any fiber can be used as the reinforcing fiber. Of these, glass fiber, aramid fiber, ceramic fiber, alumina fiber, nylon fiber and the like are particularly preferable. As the resin used for the fiber reinforced prepreg 43, a thermoplastic resin and a thermosetting resin are preferably used. Among these, polyether ether ketone resins, polyphenylene sulfide resins, polyamideimide resins, polyester resins, polyimide resins, phenol resins, epoxy resins, unsaturated polyester resins, and the like are preferably used.

  Although FIG. 7 shows a configuration in which the network structure is sandwiched between the fiber reinforced prepregs 43, instead of the fiber reinforced prepreg 43, a reinforcing fiber layer is laminated on both surfaces of the network structure and a resin is further added to the whole. An impregnated structure may be used. Also in this case, the same fiber reinforced prepreg 43 as the reinforced fiber and resin can be used.

  The configuration of the electric heating board 20 will be described with reference to FIGS. 2 to 6 again.

  The soaking material 24 is to uniformly distribute the heat generated from the planar heating element 23 in the in-plane direction and transmit it to the floor finishing material 12. The soaking material 24 is fixed on the planar heating element 23 with a double-sided adhesive tape, an adhesive, or the like. As the soaking material 24, a metal foil such as aluminum or copper or a thin plate can be used.

  The reinforcing plate 25 functions as a reinforcing layer that protects the planar heating element 23 from the impact force applied to the electric heating board 20 via the floor finish 12 by falling objects or the like. The reinforcing plate 25 is leveled by a double-sided adhesive tape or adhesive. It is fixed on the heat material 24. As the reinforcing plate 25, any material can be used as long as it can exhibit such performance, for example, a metal plate such as a steel plate or a resin plate made of a thermoplastic resin. The thickness of the reinforcing plate 25 is appropriately set according to the material so that the required performance can be obtained. If the reinforcing plate 25 is made of a metal plate, the reinforcing plate 25 can also be used as the soaking material 24. In this case, the soaking material 24 may not be used.

  The reinforcing plate 25 is formed with an opening 25a penetrating in the thickness direction. The opening 25a is formed in a region facing the connector 28a located in the wiring path member 26 among the connectors 28a and 28b described above. The planar heating element 23 and the soaking material 24 are also formed with openings in regions facing the openings 25 a of the reinforcing plate 25. Therefore, as shown in FIG. 8, the connector 28a is exposed from the surface side of the electric heating board 20 through the opening 25a of the reinforcing plate 25, and the adjacent electric heating board 20 is exposed in the opening 25a. Connectors 28a and 28b can be connected to each other.

  As shown in FIGS. 2 and 4, a lid 29 is fitted into the opening 25 a of the reinforcing plate 25. The lid 29 is made of the same material as the reinforcing plate 25 and has the same thickness as the reinforcing plate 25. The planar size of the opening formed in the planar heating element 23 and the heat equalizing material 24 is smaller than the planar size of the opening 25a of the reinforcing plate 25, and a part of the heat equalizing material 24 is exposed from the opening 25a. ing. Accordingly, the lid 29 fitted into the opening 25a is supported on the heat equalizing material 24 exposed from the opening 25a. The lid 29 fitted in the opening 25 a is fixed by covering the lid 29 and affixing the adhesive tape 19 g on the upper surface of the reinforcing plate 25. As the adhesive tape 19g, a heat-resistant polyester adhesive tape can be used.

  When the reinforcing plate 25 is made of a metal plate and the electric heating board 20 is fixed to the floor base 1 by nailing or screwing, the reinforcing plate 25 made of a metal plate is used for nails or screws at the construction site. It is difficult to drill holes. Therefore, as shown in FIG. 2, it is preferable that a through hole 25 b through which a nail or a screw passes is formed in the reinforcing plate 25 in advance. The through hole 25b corresponds to the frame member 22a and the beam member 22b, and is provided at a position where the conductive fiber 41 (see FIG. 7) of the planar heating element 23 does not exist.

  By forming the through holes 25 b in the reinforcing plate 25, the electric heating board 20 can be easily fixed on the floor base 1 even when a metal plate is used as the reinforcing plate 25. Further, since the position of the nail or screw is defined by the through hole 25b, it is possible to prevent the conductive fiber 41 of the planar heating element 23 from being cut by the nail or screw.

  Referring again to FIG. 1, auxiliary materials 3 a and 3 b are installed around the heater unit 11. The auxiliary materials 3a and 3b are for making the height of the area on the floor base 1 where the heater unit 11 is not installed coincide with the height of the upper surface of the heater unit 11. The auxiliary members 3a and 3b can be made of a member similar to the frame member 22a of the electric heating board 20, for example, expanded polypropylene, expanded polystyrene, expanded polyurethane, or the like.

  The floor finishing material 12 is fixed to the upper surfaces of the heater unit 11 and the auxiliary materials 3a and 3b. As the floor finishing material 12, any member generally used as a flooring material, for example, a wooden flooring board, a synthetic flooring material of wood and resin, a resin tile, a tile carpet, or the like can be used. The floor finishing material 12 can be fixed on the heater unit 11 by any appropriate method such as fixing with a double-sided adhesive tape, fixing with a nail, fixing with an adhesive, etc., depending on the type of flooring used.

  As described above, an arbitrary member can be used for the floor finish 12, but considering that the floor finish 12 is installed on the heater unit 11, It is preferable that deformation or alteration due to heat hardly occur. As such a floor finish 12, “Message New” manufactured by Asahi Woodtech Co., Ltd. is excellent in workability due to its thinness of 3 mm and easy cutting. "(Registered trademark) can be preferably used.

  When a thin floor finish 12 is used in this way, when an article is accidentally dropped on the floor finish 12, energy from the dropped article (falling object) is almost alleviated in the floor finish 12. Instead, it is transmitted to the electric heating board 20 as an impact force. The impact force at this time becomes larger as the fallen object is harder and the fall height is higher, and depending on the degree, the heating resistor built in the electric heating board 20 may be damaged.

  On the other hand, in this embodiment, since the electric heating board 20 has the reinforcing plate 25 on the outermost surface which is a surface in contact with the floor finish material 12, a thin floor material is used as the floor finish material 12. Even so, it is possible to protect the heating resistor from an impact caused by a falling object and to prevent the heating resistor from being damaged.

  Since the electric heating board 20 includes the reinforcing plate 25, the heat transfer efficiency toward the floor finish 12 is reduced as compared with the case where the electric heating board 20 does not include the reinforcing plate 25. However, the reinforcing plate 25 can exhibit an effect as the thickness of the floor finishing material 12 is reduced. By using such a thin floor finishing material 12, the heat transfer efficiency of the floor finishing material 12 itself is improved. The reduction in heat transfer efficiency of the electric heating board 20 can be offset by the thin floor finish 12. That is, it can be said that the electric heating board 20 of the present embodiment is particularly suitable for combination with the thin floor finish 12. In particular, when the reinforcing plate 25 is formed of a metal plate and also used as the heat equalizing material 24, the influence on the heat transfer efficiency due to the provision of the reinforcing plate 25 can be suppressed to a negligible level.

  Furthermore, by using the planar heating element 23 as described above, the thickness of the entire electric heating board 20 can be reduced to, for example, 9 mm. Even when combined with the thin floor finish 12, the floor base 1 With the increase in height from above, the total thickness can be about 12 mm. Thereby, even if the heater unit 11 and the floor finishing material 12 are directly installed on the existing floor material at the time of renovation, an indoor space that is almost the same as that before the renovation can be achieved.

  Next, an example of the construction procedure of the floor heating system 10 of the present embodiment will be described by taking the case of construction during renovation as an example.

  First, the heater unit 11 is installed on the floor base 1. In this case, the floor foundation 1 is an existing floor. The heater unit 11 can be installed by the following procedure.

  The heater unit 11 is pre-wired by wiring 27 in a state where a plurality of electric heating boards 20 are arranged in a line, and is folded in a zigzag manner at the connecting portions of the electric heating boards 20 as shown in FIG. It is carried into the room in a state.

  Here, if the electric heating boards 20 are connected to each other by the wiring 27 alone, an excessive load may be applied to the wiring 27 when the heater unit 11 is installed, and the wiring 27 may be damaged. Since it is inconvenient, it is preferable that the electric heating boards 20 are connected to each other by a mechanical connecting means separately from the wiring 27. The connection means is not particularly limited. For example, as shown in FIG. 2, holes 20 a are provided on both side edges of the electric heating board 20, and the adjacent electric heating boards 20 are connected by passing through the connection band 20 b between the holes 20 a. A method of mechanically connecting the electric heating board 20 with the connecting band 20b is preferable. According to this method, by adjusting the length of the connecting band 20b, the interval between the electric heating boards 20 can be adjusted, and the electric heating boards 20 having various thicknesses can be folded.

  After the heater unit 11 is carried in the folded state, the heater unit 11 is extended and unfolded as shown in FIG. Next, as shown in FIG. 9C, the heater unit 11 is completely unfolded and laid on the floor foundation 1 (see FIG. 1). Next, the connecting band 20b (see FIG. 2) that mechanically connects the electric heating boards 20 is pulled up to close the interval between the electric heating boards 20, and then the connecting band 20b is cut and removed, thereby removing the connection band 20b shown in FIG. As shown in d), the electric heating boards 20 are brought into close contact with each other to complete the installation of the heater unit 11.

  In the step of installing the heater unit 11, immediately after the heater unit 11 is deployed, there is a gap between the electric heating boards 20 as shown in FIG. 10A. The wiring 27 has a length sufficient to allow the gap. Then, by filling the gaps between the electric heating boards 20, the extra length of the wiring 27 is accommodated in the extra length accommodating portion 26 a of the wiring path member 26 as shown in FIG. 10B.

  Next, the auxiliary materials 3 a and 3 b are installed around the heater unit 11. Then, the floor finishing material 12 is installed on the heater unit 11 and the auxiliary materials 3a and 3b.

  On the other hand, an opening for the controller 30 is provided in the wall 2. The lead wire 14 and the primary power supply line 15 are routed through the back side of the wall 2 and connected to the controller 30 by using an opening formed in the wall 2 for the controller 30. Finally, the installation of the floor heating system 10 is completed by fitting the controller 30 into the opening of the wall 2 and fixing the controller 30 to the wall 2.

  As described above, according to the present embodiment, since the heater unit 11 in which a plurality of electric heating boards 20 are connected in advance is used, when the heater unit 11 is installed, electrical connection between the electric heating boards 20 is not necessary. Yes, it can be installed very easily.

  In the present embodiment, the electrical heating boards 20 are connected to each other by the connectors 28a and 28b, and the connectors 28a and 28b can be connected from the opening provided on the upper surface side of the electrical heating board 20. Yes.

  Thus, for example, when the heater unit 11 is installed, or after the heater unit 11 is installed and before the floor finishing material 12 is installed, the heater unit 11 is inspected for current. When a failure is found in one or a plurality of electric heating boards 20, only the electric heating board 20 in which the failure is found can be replaced instead of the entire heater unit 11. This is the same in the manufacturing process of the heater unit 11 as well as the installation site of the heater unit 11. Furthermore, since the heater unit 11 can freely change the number of the electric heating boards 20 corresponding to the installation area, the types of the heater units 11 prepared in advance can be minimized. As a result, it is possible to reduce the number of stocks at stores and the like.

  In addition, when it is not necessary to consider the replacement of the electric heating board 20, the connectors 28a and 28b may not be used, and the wires may be connected using a wiring having a length over the entire adjacent direction of the plurality of electric heating boards 20. In this case, an opening for connecting the connectors 28a and 28b and a lid for closing the opening are unnecessary.

  In the above-described embodiment, the example in which the reinforcing plate 25 is provided as the reinforcing layer on the outermost surface of the electric heating board 20 has been described. However, the reinforcing layer only needs to be on the surface side in contact with the floor finish 12 rather than the heating resistor. For example, the planar heating element 23 may include a reinforcing layer. An example is shown in FIG.

  The planar heating element 23 ′ shown in FIG. 11 is basically laminated on both surfaces of a network structure composed of conductive fibers 41 and non-conductive fibers 42, similar to that shown in FIG. The fiber reinforced prepreg 43 and the film 44 constituting the insulating layer on the front and back surfaces of the planar heating element 23 are provided. However, the point that the fiber reinforced prepreg 43 has a two-layer structure in the portion closer to the floor finishing material 12 (see FIG. 1) than the mesh structure, which is the upper surface side of the mesh structure, is shown in FIG. It is different from the example shown in.

  Thus, by making the fiber reinforced prepreg 43 into a two-layer structure, the fiber reinforced prepreg 43 can function as a reinforcing layer. Of course, in this case, the reinforcing plate 25 (see FIG. 2 and the like) described in the above-described embodiment is not necessary. The soaking material is provided as necessary. The number of layers of the fiber reinforced prepreg 43 on the upper surface side of the network structure may be three or more if necessary. Alternatively, the number of layers of the fiber reinforced prepreg 43 on the upper surface side of the network structure is one, and the thickness is lower than that of the network structure on the lower surface side of the network structure 1 (FIG. 1). It can be made to function as a reinforcing layer by making it thicker than the portion that becomes the reference) side. This configuration can also be applied to the case where both sides of the network structure are sandwiched between the reinforcing fiber layers instead of the fiber reinforced prepreg 43 and the entire resin is impregnated.

  Also, in the configuration in which the sheet heating element 23 ′ itself is provided with a reinforcing layer, when the electric heating boards are connected by a connector, an opening for connecting the connector is provided in the sheet heating element 23 ′. A lid is fitted into the opening to close the opening.

  Other than the case where the planar heating element 23 ′ shown in FIG. 11 is used, the configuration of the entire electric heating board and the configuration of the heater unit may be the same as those of the above-described embodiment except that there is no reinforcing plate.

1 is a schematic perspective view of a floor heating system according to an embodiment of the present invention. It is a top view of the electric heating board shown in FIG. It is a rear view of the electric heating board shown in FIG. It is the sectional view on the AA line of FIG. FIG. 3 is a sectional view taken along line BB in FIG. 2. It is the figure which cut | disconnected the electric heating board shown in FIG. 1 along the plane perpendicular | vertical to the thickness direction, and looked at the cross section from the back surface side. It is sectional drawing which isolate | separates and shows an example of the planar heating element which can be applied to this invention for every layer. It is a principal part top view of the electric heating board in the state which removed the cover in FIG. It is a figure explaining an example of the construction procedure of the heater unit shown in FIG. It is a figure which shows the state of the wiring in a wiring path | route member in the process shown to (c) of FIG. It is a figure which shows the state of the wiring in a wiring path | route member in the process shown to (d) of FIG. It is sectional drawing which isolate | separates and shows the planar heating element in the electric heating board by other embodiment of this invention for every layer.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Floor base 2 Wall 10 Floor heating system 11 Heater unit 12 Floor finishing material 19a-19g Adhesive tape 20 Electric heating board 21 Heat insulating material 22a Frame material 22b Beam member 23 Planar heating element 24 Soaking material 25 Reinforcement plate 25a Opening 25b Through Hole 26 Wiring path member 27 Wiring 28a, 28b Connector 29 Lid 30 Controller

Claims (13)

An electric heating board laid between the floor foundation and the floor finish,
A planar heating element with a heating resistor that generates heat when energized;
An electric heating board having a reinforcing layer for protecting the heating resistor from an impact force applied via the floor finishing material, located on the floor finishing material side of the heating resistor.   The electric heating board according to claim 1, wherein the reinforcing layer is a metal plate disposed on a surface side of the planar heating element.   The electric heating board according to claim 1, wherein the reinforcing layer is a resin plate disposed on a surface side of the planar heating element. A heat insulating material, and a frame member disposed around the outer periphery of the heat insulating material;
The planar heating element is disposed on the heat insulating material and the frame member,
The portion on the frame member of the reinforcing layer is provided with an insertion hole through which a screw or a nail used for fixing the electric heating board to the floor finish is inserted. Electric heating board.   5. The electric heating board according to claim 4, further comprising at least one beam member that divides the region surrounded by the frame member into a plurality of regions, wherein the heat insulating material is disposed in each of the plurality of regions. On the back side of the planar heating element, a wiring provided with connectors at both ends for electrically connecting the plurality of electric heating boards to each other is positioned so that one connector overlaps the planar heating element. The other connector is arranged extending from the electric heating board,
The opening is formed in the area | region facing the said one connector of the said planar heating element and the said reinforcement layer, The lid member is engage | inserted in this opening, The any one of Claim 2 to 5 Electric heating board as described in. The planar heating element has the heating resistor and a fiber reinforced resin layer laminated on both sides in the thickness direction of the heating resistor,
The electric heating board according to claim 1, wherein the reinforcing layer includes the fiber reinforced resin layer.   The electric heating board according to claim 7, wherein the fiber reinforced resin layer is laminated in a plurality of layers at a portion closer to the floor finish material than the heating resistor.   The fiber reinforced resin layer is thicker at a portion closer to the floor finish than the heating resistor than at a portion closer to the floor base than the heating resistor. Electric heating board as described in. A heat insulating material, and a frame member disposed around the outer periphery of the heat insulating material;
The electric heating board according to claim 7, wherein the planar heating element is disposed on the heat insulating material and the frame member.   The electric heating board according to claim 10, further comprising at least one beam member that divides a region surrounded by the frame member into a plurality of regions, wherein the heat insulating material is disposed in each of the plurality of regions. On the back side of the planar heating element, a wiring provided with connectors at both ends for electrically connecting the plurality of electric heating boards to each other is positioned so that one connector overlaps the planar heating element. The other connector is arranged extending from the electric heating board,
The electric heating according to any one of claims 7 to 11, wherein an opening is formed in a region of the planar heating element facing the one connector, and a lid member is fitted into the opening. board. At least one heater unit laid between the floor base and the floor finish;
A controller for controlling the heater unit,
The floor heating system, wherein the heater unit is electrically connected in advance with a plurality of electric heating boards according to any one of claims 1 to 12.

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