JP3138382B2 - Dry double floor floor heating system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floor heating apparatus suitable for a dry double floor having a floor panel supported by supporting legs on a base floor and having a space below the floor panel. .

[0002]

2. Description of the Related Art In recent years, dry double floors (called free access floors, OA floors, etc.) have been used in offices and the like as a means of concealing floor wiring materials for various OA equipment and responding to changes in wiring. The same dry double-floor structure is used for floors such as dwellings and welfare facilities.It also has good sound insulation performance downstairs, good shock absorption performance when falling, and good heat insulation. Since advantages such as energy saving can be obtained well, the cases of adoption are increasing.

On the other hand, there are various types of indoor heating systems, but floor heating systems have been increasingly used because of their advantages such as comfort and safety. Heat sources for floor heating include electric heat and hot water heat.
Electric heating is superior in terms of controllability and maintenance easiness. In the case of electric heating, there is a problem of energy cost such as power consumption at the time of energization.However, it is possible to reduce energy loss by combining heat insulating material, It can also save energy.

Some of the present inventors have already proposed an electric heating type floor heating apparatus which can be used particularly in combination with a dry double floor (Japanese Patent Application No. Hei 5-30627). Fig. 6 shows an example of the proposal.
Referring to (a) and (b), first, the dry double floor is, as shown in FIG.
The support legs 2 made of stud bolts are erected at predetermined intervals, and a floor panel 4 having a predetermined size and strength is placed on the support plate 3 having the upper portion of the support legs as a support surface. Finished material 5 is used. The floor heating device accommodates a heat insulator 7 in a housing 6 having an open top, and places electric heaters 8 and 9 on the heat insulator 7.
And a flange 10 provided on the housing is locked to a support 11 provided on the support leg 1 so as to be adjustable in height, and the support 11 is raised by operating a nut on the support leg. Moving in the direction, the electric heater 8,
The upper surface of the floor panel 9 is made close to the lower surface of the floor panel 4 so that the heat is prevented from dissipating downward heat and the floor panel 4 is efficiently heated.

As shown in FIG. 6B, the electric heaters 8 and 9 each have a predetermined heating value by embedding an electric heating wire 13 in a sheet-shaped main body 12 having a predetermined width and length. And a lead unit 8a, 9a is drawn out one by one. Therefore, a plurality of heat generating units are arranged vertically and horizontally according to the required heating area, and the lead wires of each unit are connected to a power supply.

[0006]

In the above proposed example,
Since electric heaters are installed in units of a sheet-shaped body with a fixed width and length, several electric heaters are used side by side to cover a large heating area, but the lead wire of each electric heater is connected to the power supply Therefore, it is necessary to perform complicated electric wiring, and the electric heater itself is also specially made, so that the unit price is inevitably high even from the structural point of view. Further, the electric heater has a fixed calorific value because it is unitized by embedding a heating wire in the sheet-shaped body in advance, and has not been able to meet a demand for changing the calorific value per unit area depending on a place. . Further, the mounting mode as a heating unit is also limited to a floor panel mounting type floor structure using stud bolts, and could not be adopted to a double floor structure having many other types. In addition, in the proposed example, since the heating wire is embedded in the sheet-shaped main body and protected, the safety design is not particularly made. However, the lower surface of the floor panel where water spills or receives falling objects. Because it is an electric heater that is attached in contact with the heater, the heating wire is exposed due to damage to the sheet-shaped body of the electric heater, and it can not be said that it will not lead to electric leakage, which improves safety. There was room for

The present invention solves the above-mentioned problems of the prior art, and its main purpose is to easily apply different types of dry double beds according to a desired heating area and to reduce the amount of heat generated. An object of the present invention is to provide a dry double-floor floor heating device which can meet demands to be changed and has improved electrical safety. Another object of the present invention is to provide a floor heating device using a heat storage material in which the heating efficiency by electric heating is further improved.

[0008]

Means of the present invention for achieving the above-mentioned main object is to provide a floor heating device arranged on a foundation floor in contact with a lower surface of a floor panel supported by supporting legs, and having a required number of gutters. A heat insulating material having a groove-like groove, a conductive thin layer covering the upper surface including the gutter-like groove of the heat-insulating material, and a heating cable for continuously storing in a required number of gutter-like grooves of the heat insulating material by self-folding. And a ground wire disposed on the conductive thin layer, and the heat insulating material is fixed at a predetermined position in the space below the floor panel, so that electrical continuity between the conductive thin layer and the ground wire is maintained. That's what I did.

The conductive thin layer can function not only as a conductive layer but also as a heat reflecting layer. For this purpose, the conductive thin layer is preferably made of a metal thin film having a surface gloss, for example, an aluminum foil.

When the surface of the conductive thin layer including the ground wire and the upper opening of the gutter-like groove are covered with a metal plate, and the ground wire or the conductive thin layer is brought into contact with the metal plate, the distance between the members of the grounding system is reduced. Conduction is further ensured, and the metal plate can also function as a heat equalizing plate for the heating of the heating cable by closing the gutter-shaped upper opening. However, the metal plate can be omitted when the floor panel is made of metal.

The heat insulating material is formed by connecting a plurality of blocks. By storing the heating cable in a continuous gutter groove extending over the plurality of blocks, the area of the entire apparatus can be increased. If the end lead and the ground wire are connected to the earth leakage breaker, automatic shutoff at the time of earth leakage is ensured.

According to the present invention, there is the flexibility to be constructed in various modes, and accordingly, the present invention can be applied to dry double floor structures of different types. For example, the thickness of the entire apparatus can be made equal to the height of the lower space of the floor panel, and the heat insulating material can be directly installed on the surface of the base floor. In that case, the dry double floor may be a so-called OA floor in which support legs are integrated with a floor panel.

[0013] Alternatively, the heat insulating material and the heating cable may be housed in an open-topped housing, and the housing may be supported on the base floor by auxiliary supporting legs whose height is adjustable. In that case, the dry double floor may be what is called a so-called free access floor of a type in which a floor panel is placed on support legs. The same can be said of a case where the bottom of the heat insulating material is received by a transfer material attached to the support leg of the floor panel so that the height can be adjusted.

Means for achieving the main object and other objects of the present invention are as follows. In a floor heating device arranged on a base floor in contact with the lower surface of a floor panel supported by supporting legs, a required number of gutter-like grooves are provided. A heat-insulating material, a conductive thin layer covering the upper surface including the gutter-like groove of the heat-insulating material, a heating cable for continuously storing the required number of gutter-like grooves of the heat-insulating material by self-folding, A ground wire disposed on the thin layer, wherein the heat insulating material is fixed in a predetermined position in the space below the floor panel so that electrical continuity between the conductive thin layer and the ground wire is maintained. Further, a heat storage material is arranged on a conductive thin layer including a ground line.

It is preferable that the heat storage material is incorporated in the floor panel, or is formed in a block shape and laminated on the conductive thin layer via a metal plate.

[0016]

1 (a) and 1 (b) show a preferred embodiment of an apparatus main body in a dry double-floor floor heating apparatus according to the present invention. As shown in FIG. 1A, the structure of the floor heating device of this embodiment includes a heat insulating material 21, an aluminum foil 22 serving as a conductive thin layer, a heating cable 23, a ground wire 24, and a metal plate 25. .

The heat insulating material 21 is a rectangular block in which a required number of gutter-like grooves 21a are provided in parallel on the upper surface, and the upper surface of the heat-insulating material including the gutter-like grooves 21a is covered with aluminum foil 22. It is.

The heating cable 23 is generally made of a metal wire having a high electric resistance, which is sequentially covered with an insulator and a sheath. For example, a heating wire having a band-shaped or round bar-shaped resistance heating element is used. A type in which electricity is supplied by a pair of electrode conductors (this also includes a self-controllable heater) can be used. Such a heating cable 23 is dropped and stored in the gutter-shaped groove 21a of the heat insulating material, but is continuously stored in a required number of gutter-shaped grooves by folding back the cable itself, so that a required area within a required area is obtained. A wiring distribution can be obtained. Therefore, an arbitrary heat generation amount can be set by selecting and storing the heating cable in the folded gutter-like groove based on a desired heat generation amount.
The heating cable 23 is inscribed in the aluminum foil 22 when housed in the gutter-shaped groove 21a, and can be electrically connected to the aluminum foil when the coating is broken. Note that the gutter-shaped groove 21a is desirably made to have a depth substantially equal to the outer diameter of the heating cable 23 and to be as smooth as possible by being flush with the upper surface of the aluminum foil 22.

The ground wire 24 is attached to the upper surface of the aluminum foil 22 by using a conductive metal wire or the like in a state where electrical contact is possible.

The metal plate 25 is provided so as to cover the upper surface of the aluminum foil 22, and is placed so as to be in electrical contact with the ground line 24.

FIG. 1 (b) shows a laying state of a floor heating device including the above-described components. In this example,
Insulation material is divided into three blocks 21-1, 21-2, 21-3.
When these blocks are continuously connected, the gutter-like grooves 21a, 21b, 2 of these three blocks are formed.
1c is in a continuous state, and the heating cable 23 is stored in the connecting gutter groove thus obtained, and the parallel cable portion is similarly stored in the other connecting gutter grooves by folding the cable itself. Things. Two metal plates 25-1 and 25 are used for the heat insulating material composed of three blocks.
-2. The ground wire 24 extends across the two metal plates 25-1 and 25-2 so as to electrically contact both of the metal plates 25-1 and 25-2, and extends over a plurality of blocks of the heat insulating material. Therefore, it extends so as to make electrical contact with the aluminum foil (not shown) of any of these blocks.

The heating cable 23 of this embodiment is
Since the resistance wire is of a type in which the resistance wire is energized and heated, a cold lead wire 26 as a lead portion is connected to both ends, and an earth leakage breaker 27 provided with the cold lead wire 26 in a power supply system.
, And the ground wire 24 is drawn out to the outside and connected to the ground system of the earth leakage breaker 27. The lead-out portion of the ground wire 24 may be appropriately covered with an insulator so as to prevent electrical contact and conduction with nearby components.

According to the floor heating apparatus of this embodiment, the heat insulating material is formed into an aggregate of blocks according to a desired heating area, and a gutter-like groove is selected for the block aggregate to connect the heating cable 23. Since the wires are wired, the size can be set according to the desired heating area, and the heating value can be partially changed by changing the wiring distribution of the heating cable. In addition, heating cable 23
Can be laid back over a plurality of blocks in a single line, so that connection can be simplified. Further, in the case where the covering of the heating cable 23 is damaged and the electric leakage occurs, the leakage current flows into the electric leakage breaker 27 through the aluminum foil 22 and the ground wire 24, and immediately cuts off the circuit. Further, the aluminum foil 22 reflects heat due to the surface gloss and prevents the heat generated by the heating cable 23 from dissipating to the heat insulating material side.
Further, since the metal plate 25 is electrically connected to the ground line, there is no possibility that an electric shock is given to a human body at the time of electric leakage, and the metal plate also functions as a soaking plate for receiving heat generated by the heating cable 23. be able to. In addition, the metal plate can also function as a mechanical protective layer in an upper layer portion, and is excellent in improving safety.

FIG. 2 shows an example of assembling the floor heating apparatus according to the present invention to a dry double floor. The double floor of the present embodiment has a rubber mold body on the lower surface side of the floor panel 30 made of particle board. And the support legs 31 are integrated, and a low-floor double floor is constructed simply by placing the support legs 31 on the surface of the base floor 32. The floor heating device main body 33 for this low floor double floor selects the thickness of the heat insulating material 21 so that the thickness of the entire device is equal to the height of the lower space of the floor panel 30;
The bottom of the heat insulating material is placed directly on the foundation floor between the support legs 31 with a narrow width. Then, the upper surface of the device 33 comes into close contact with the lower surface of the floor panel 30. In this embodiment, since the floor panel 30 is made of wood, the upper surface of the apparatus is a metal plate. Also, the support legs 31
Has both sides and the center of the floor panel 30,
The floor heating device main body 33 is assembled in two parts.

FIG. 3 shows another example of assembling the floor heating apparatus according to the present invention to a dry double floor. The double floor according to the present embodiment is based on support legs 34 made of stud bolts. This is called a so-called free access floor, which is constructed by mounting a metal floor panel 36 made of aluminum die-cast or the like on a support plate 37 above a support leg 34, and a floor heating device for this. The main body 38 is of a type in which a heat insulating material, a heating cable, and the like are stored in a housing 39 of an open-top type, and the housing 39 is independently supported on the base floor 35 by height-adjustable auxiliary support legs 40 formed of stud bolts. Things. The upper surface of the device 38 is brought into contact with the lower surface of the metal floor panel 36 by adjusting the height of the auxiliary support leg 40. In this embodiment, since the lower surface of the metal floor panel 36 is not smooth, it is preferable that the upper surface of the apparatus main body 38 be a metal plate. If the lower surface of the metal floor panel is smooth, a ground wire and an aluminum foil may be used as the upper surface of the device without using a metal plate.

FIG. 4 shows an embodiment of a floor heating apparatus with a heat storage material according to the present invention in a state where the floor heating apparatus is assembled on a dry double floor. Floor 4
2 is a so-called free access floor of a type in which a metal floor panel 43 is placed on the support legs. In the present embodiment, the floor heating device is composed of a floor heating device in which a floor heating device main body 44 and a heat storage material 45 are combined, and the floor heating device main body 44 is a transfer material 46 attached to the support legs 41 so as to be adjustable in height.
The upper surface of the apparatus main body is brought into close contact with the lower surface of the floor panel 43 by adjusting the height of the transfer material 46 from the bottom (the bottom of the heat insulating material). The heat storage material 45 is preferably a unit in which a plastic container is filled with a substance having a heat capacity capable of accumulating heat by midnight power and releasing heat without power during the day, such as sodium sulfate decahydrate. Panel 43
It is to be loaded inside. In this embodiment, since the floor panel is made of metal, the upper surface of the floor heating device main body 44 is made of a ground wire and aluminum foil, and there is no need to use a metal plate.

FIG. 5 shows another embodiment of the floor heating device with a heat storage material according to the present invention.
Is a type in which a heat insulating material 49 with an upper surface aluminum foil, a heating cable 50, a ground wire 51, and a metal plate 52 are housed in a housing 48. 53 is stored,
The heat storage material 53 is brought into close contact with the metal plate 52. Further, the upper surface of the heat storage material 53 is a contact surface with the lower surface of the floor panel.

Although not specifically described in each of the above embodiments, a surface finishing material such as a tile carpet is applied on the floor panel to improve comfort. Regarding the operation of the heating cable, it is preferable to attach a temperature sensor to an appropriate part, for example, a finishing material application part, compare the output with a set temperature, and turn on / off the power supply.

[0029]

As described above, according to the floor heating apparatus of the dry double floor according to the present invention, the heat insulating material is formed into a required size according to the structure of the dry double floor and the desired heating area. In addition, the required number of gutter-shaped grooves are formed on the heat insulating material according to the amount of heat generated, and the installation of the heating cables is completed by simply storing the heating cables in the required number of gutter-shaped grooves continuously while folding the heating cables. It can be easily installed according to the target heating area and heat value, and even if you want to partially change the heat value, select the gutter-shaped groove of the heat insulating material and set the wiring density of the heating cable sparsely and densely. Can respond to
In addition, as described above, construction can be performed according to the structure of the dry double floor, so it can be used for different types of double floors. And a flexible floor heating system can be constructed.

Further, the upper surface of the heat insulating material including the gutter-like groove for accommodating the heating cable is covered with a conductive thin layer, a ground wire is attached on the conductive thin layer, and the heat insulating material is fixed at a predetermined position. As a result, electrical conduction between the conductive thin layer and the ground line is achieved, so that when the heating cable is damaged or deteriorates and leaks, the leakage current is transmitted through the conductive thin layer and the ground line. It is electrically safe without any risk of electric shock.

Further, according to the floor heating device with a heat storage material of the present invention, the heating efficiency by electric heating is further improved in addition to the above-mentioned functions and effects.

[Brief description of the drawings]

FIG. 1 is an embodiment of a floor heating device according to the present invention, in which (a) is a side sectional view of a floor heating device main body, and (b) is a plan view showing a laying state of the floor heating device main body.

FIG. 2 is a side sectional view showing a first embodiment in which the floor heating device of the present invention is incorporated in a dry double floor.

FIG. 3 is a side sectional view showing a second embodiment in which the floor heating device of the present invention is incorporated in a dry double floor.

FIG. 4 is a cross-sectional side view showing an example in which the floor heating device with heat storage material of the present invention is incorporated in a dry double floor.

FIG. 5 is a cross-sectional side view showing another embodiment of the floor heating device with a heat storage material of the present invention.

FIG. 6 shows an example of a floor heating device of a dry double floor that has already been proposed, (a) is a side sectional view in which the floor heating device is incorporated in the dry double floor, and (b) is a plane of the electric heater. FIG.

[Explanation of symbols]

 21, 21-1, 21-2, 21-3 Heat insulating material 21a, 21b, 21c Gutter-shaped groove 22 Aluminum foil (conductive thin layer) 23 Heating cable 24 Ground wire 25, 25-1, 25-2 Metal plate 26 cold lead wire (lead part) 27 earth leakage breaker 30 floor panel (particle board) 31 support leg 32 base floor 33 floor heating device main body 34 support leg 35 base floor 36 floor panel (metal) 38 floor heating device main body 39 housing Reference Signs List 40 auxiliary supporting leg 41 supporting leg 42 base floor 43 floor panel (made of metal) 44 floor heating device main body 45 heat storage material 46 delivery material 47 floor heating device main body 48 housing 49 heat insulating material 50 heating cable 51 ground wire 52 metal plate 53 heat storage Lumber

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yukio Shishido 3-1-1, Sukekawacho, Hitachi City, Ibaraki Prefecture Inside Nippon Rubber Processing Co., Ltd. (72) Inventor Makoto Kaneda 3-1-1, Sukekawacho, Hitachi City, Ibaraki Prefecture No. 1 Nippon Rubber Processing Co., Ltd. (58) Field surveyed (Int. Cl. ⁷ , DB name) F24D 13/02 E04F 15/18

Claims (10)

(57) [Claims] 1. A floor heating device arranged on a base floor in contact with a lower surface of a floor panel supported by support legs, comprising a heat insulating material having a required number of gutter-like grooves and a gutter-like groove of the heat insulating material. A conductive thin layer covering the upper surface, a heating cable continuously housed in the required number of gutter-shaped grooves of the heat insulating material by self-folding, and a ground wire arranged on the conductive thin layer,
A floor heating apparatus for a dry double floor, wherein the heat insulating material is fixed at a predetermined position in the lower space of the floor panel so that electrical conduction between the conductive thin layer and the ground line is maintained. . 2. The floor heating device according to claim 1, wherein the conductive thin layer is made of a metal thin film having surface gloss. 3. The method according to claim 1, wherein the surface of the conductive thin layer including the ground line and the upper opening of the gutter-like groove are covered with a metal plate, and the ground line or the conductive thin layer is brought into contact with the metal plate. Or the floor heating device according to 2. 4. A heat insulating material comprising a plurality of blocks connected to each other. A heating cable is housed in a gutter-shaped groove extending over the plurality of blocks, and a lead portion and a ground wire at an end of the heating cable are leaked. The floor heating device according to any one of claims 1 to 3, wherein the floor heating device is connected to a circuit breaker. 5. The heat insulating material is installed directly on the surface of the base floor, assuming that the thickness of the entire apparatus is equal to the height of the space below the floor panel.
The floor heating device according to claim 1. 6. The heat insulating cable and the heating cable are housed in an open-top housing, and the housing is supported on a base floor by auxiliary support legs whose height is adjustable. The underfloor heating device as described. 7. The floor heating apparatus according to claim 1, wherein the bottom of the heat insulating material is received by a transfer material attached to the support leg of the floor panel so that the height can be adjusted. 8. A floor heating device arranged on a base floor in contact with a lower surface of a floor panel supported by supporting legs, comprising a heat insulating material having a required number of gutter-like grooves and a gutter-like groove of the heat insulating material. A conductive thin layer covering the upper surface, a heating cable continuously housed in the required number of gutter-shaped grooves of the heat insulating material by self-folding, and a ground wire arranged on the conductive thin layer,
The heat insulating material is fixed at a predetermined position in the space below the floor panel so that electrical conduction between the conductive thin layer and the ground line is maintained, and heat is stored on the conductive thin layer including the ground line. A floor heating device with a dry double floor, characterized by placing materials. 9. The floor heating device according to claim 8, wherein the heat storage material is built in the floor panel. 10. The floor heating apparatus according to claim 8, wherein the heat storage material is formed in a block shape and is stacked on the conductive thin layer via a metal plate.