JPH08152150A - Structure of floor heating - Google Patents

Abstract

PURPOSE: To provide a structure of floor heating which enables mainly utilizing the surplus of the nighttime power supply for regenerative floor heating. CONSTITUTION: This structure is a floor heating for warning a room by means of radiant heat from the floor. Between a slab type floor 11 and the surface of the ground 13 a layer of sand 15 is formed, in which either directly upon the surface of the ground or close thereto a prescribed number of electric resistance heating panels 17 are laid.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel floor heating structure and its construction method. The present invention relates to a new floor heating structure capable of storing heat using nighttime electric power.

[0002]

2. Description of the Related Art Recently, due to a demand for more comfortable heating in houses, radiant (radiant) heating from a floor, which can efficiently heat a room by natural convection and consumes less energy, that is, floor heating has attracted attention. ing.

Underfloor heating is the passage of hot water or steam through a slab floor or a pipe buried or placed under the floor, or
This is a method in which hot air is blown into the buried duct or a heating wire is buried. (See "The World Encyclopedia," published by Heibonsha, 1973 edition, Volume 19, pages 567-568).

[0004]

However, in the floor heating structure introduced in the above publications, the pipes and the like, which are heating means, are either buried in concrete or placed on concrete or on a heat insulating material. It was the method of setting.

For this reason, when the supply of hot water, steam, electricity, etc., which is the heating source, which is the heating means, is stopped, the heat possessed by the heating means is dissipated through concrete etc., and the heating effect disappears early. Presumed. Even when the heat insulating material (heat insulating material) is disposed on the heat insulating material, the heat insulating material itself rarely has a heat storage effect and is dissipated through the air. Presumed.

On the other hand, as far as the present inventors know, there is no heat storage type heating system utilizing surplus nighttime electric power, which is found in the hot water supply system using nighttime electric power.

In view of the above, the present invention mainly provides surplus nighttime electric power to enable heat storage type floor heating, and to provide a floor heating structure which is expected to relatively reduce power consumption during the daytime. To aim.

[0008]

[Means for Solving the Problems]

(1) The floor heating structure of the present invention according to claim 1 solves the above problem by the following configuration.

A floor heating structure for warming a room by radiant heat from a floor surface, wherein a sand layer is formed between a slab floor and the ground surface (ground), and an electric layer is directly or near the ground surface of the sand layer. It is characterized in that a predetermined number of resistance heating panels are laid.

(2) A method for constructing a floor heating structure according to a third aspect of the present invention is to solve the above problems by the following constitution.

A method for constructing a floor heating structure according to claim 1, wherein after grounding a ground surface (ground) of a slab floor construction site of a house, a direct or thin sand layer is formed to heat a predetermined number of electric resistances. A panel is laid, a sand layer is constructed on the electric resistance heating panel, and a slab floor is constructed on the sand layer.

[0012]

Embodiment An embodiment of the present invention will now be described with reference to the drawings.
explain.

A. Basically, a sand layer 15 is formed between the slab floor 11 and the ground surface (ground) 13, and an electric resistance heating panel (hereinafter referred to as “heating panel”) is provided directly or near the ground surface of the sand layer 15. .) 17 is a predetermined number,
It is a laid structure. (See FIG. 1) Here, the material of the slab floor 11 may be a concrete floor, a wooden floor, or the like. At this time, it is desirable that the lower surface of the floor slab is waterproofed or a moisture-proof sheet such as a vinyl sheet is attached so that moisture does not rise.

Further, it is preferable that a heat insulating material (glass wool, styrene foam, etc.) 19 having a thickness of about 10 cm is entirely attached to the inside of the concrete foundation portion B of the building from the viewpoint of preventing heat dissipation.

Sand materials forming the sand layer 15 are river sand, mountain sand,
Sea sand or the like is not particularly limited, and one having a diameter of 0.01 to 2 mm is usually used, and soil or crushed stone may be appropriately mixed.

The thickness of the sand layer is usually approximately 5 to 30 cm (desirably 10 to 20 cm), which is approximately matched with the gap between the slab floor 11 and the ground surface 13. If it is less than 5 cm, the heat storage and the uniform dispersion of heat will be adversely affected, and the heating panel may be damaged when the sand layer is leveled with a bulldozer or the like. Further, when it exceeds 30 cm, heat radiation from the surroundings and heat transfer efficiency to the floor surface are reduced.

Around the sand layer 15, that is, inside the concrete foundation portion, a heat insulating layer (heat insulating layer) for preventing heat dissipation.
It is desirable to form 19. For example, the heat insulating layer 19 may be a glass wool layer having a thickness of about 5 to 15 cm or a styrofoam layer.

Further, usually, heating control is performed by a thermostat 23 which is designed to work with a sensor 21 embedded in the slab floor 11 so as to interlock with a power feeding portion of the heating panel 17.

B. The heating panel 17 is not particularly limited, but an electric heating assembly having the following configuration mainly arranged on the ceiling proposed by the applicant of the present application in the application of Japanese Patent Application No. 5-207682 in order to generate radiant heat. It is desirable to use a modified version for floor heating from the standpoint of maintenance-free (durability). Specifically, it is as follows.

"A rectangular heating panel in which an electric resistance heating wire is embedded and a pair of lead wires connected to the electric resistance heating wire is projected from one end face, and a connector for connecting the pair of lead wires to a power supply line. And holding and fixing a part of the lead wire and the power supply line together with the connector through an electrical insulating means,
In an electric heating panel assembly including a closure member having a U-shaped cross section that holds one end of the heating panel, a connecting portion between the electric resistance heating wire and the lead wire is
The electric resistance heating wire is covered with a heat-shrinkable tube, and the electric resistance heating wire is covered with a fluororesin. Specifically, it is as follows.

(1) As shown in FIG. 2, the heating panel 17 is
The heating panel 10 has a rectangular shape as a whole, and the resistance heating wire 12 is embedded in a bent shape as a whole.
It consists of As shown in FIGS. 1 and 4, the heating panel 17 has flat opposing surfaces, that is, both side surfaces 1.
4, 16 and the end surface 18 from which the lead wires 20 and 22 project. The lead wires 20 and 22 are connected to the heating resistance wire 12 in the heating panel 17, and are supplied from a power source (not shown) by a power supply wire indicated by 24.

Feed line 24 serves to connect a series of heating panels, such as panel 10, in parallel. Of course, the on / off operation of the panel for heating control in the room or zone can be performed by the thermostat means described later.

The exemplary feed line 24 is a feed insulated conductor 28,
The outer insulation 26 is provided with the area a of FIG. 1 removed to expose 30. Feeding insulated conductor 28,
30 is connected to the leads 20, 22 by small connectors 32, 32, respectively.

In the present invention, the feeder line 24 and the lead wire 20,
A wide variety of connectors 3 for electrically connecting 22
2 can be used, and for example, those shown in FIGS. 3 to 4 can be preferably used.

The connector 32 includes a connector body 33 and
The connector body 33 has a cover portion 35 hinged to one side and a lock portion 37. Then, the connector main body 33 includes the power feeding insulated conductor 28.
A connection terminal 34 having slits 34a and 34b that bite into the insulating coating of (30) and the lead wire 20 (22) so as to be electrically connectable is incorporated, and a holding groove 33a for introducing a power supply line is provided. Further, the cover portion 35 includes a lead wire introducing cylinder portion 35a, and a claw receiving portion 35b on the free end side. Further, the lock portion 37 has an L-shaped cross section and is provided with a lock claw 37a on the free end side.

The usage of the connector 32 is as follows.

With the lock portion 37 and the cover portion 35 unlocked, the feeding insulated conductor 28 (30) is provided with the slit 3.
It is sandwiched between 4a. Then, the connection terminal 34 digs into the insulation coating of the feeding insulated conductor 28 (30), and the feeding insulated conductor 28 (30)
(30) is electrically connected to the connection terminal 34. The lead wire 20 (22) is inserted into the lead wire introducing tubular portion 35a until it stops. Then, the lock claw 37a of the lock part 37 is engaged with the claw receiving part 35b of the cover part 35 to close the connector 32. Then, the lead wire 20 (2
The connection terminal 34 bites into the insulation coating of 2), and the lead wire 2
0 (22) is electrically connected to the connection terminal 34.
Thus, the feeding insulated conductor 28 (30) and the lead wire 20
(22) is electrically connected by automatically stripping the insulating coating at the connection terminal 34.

The connectors 32, 32 are arranged as shown in FIG. 2, and the lead wires 20, 22 and the power supply line insulated conductor 28,
Once the necessary connections have been made between 30, the connections are ready for containment by the closure member 38.

In accordance with the present invention, closure member 38
Is a U-shaped structure as shown in FIGS.
It is generally flat and has opposed parallel legs 40, 42 spaced to tightly surround the edge of the heating panel 17. That is, when the closure member 38 is moved so that the screw holes 52 formed on the front leg 42 side of the closure member 38 correspond to the fixing line L, the legs 40, 42 are moved.
Slides over the sides 14, 16 of the panel and surrounds them when in the assembled position. Providing a joining means to limit the movement of the legs 40 and 42 to the panel and to keep the curved portion 44 of the closure member 38 and the panel edge 18 spaced apart, as shown in FIG. Is desirable. The joining means may take the form of ribs 46 which extend laterally inward of the legs 40 and which engage the edges 18 as shown in FIG. Further, it is desirable that the size and shape of the legs 40, 42 be such that they can be slightly press fit. That is, the legs 40, 42 are
When engaged with Nos. 4 and 16, they are slightly repelled, separated from each other, and bent inwardly to move the closure member 38 into FIG.
It can be held by friction at the assembly position shown in FIG.

When the closure member 38 is arranged as shown in the drawing, the lead wire 2 is in the range of a of the power supply wire 24 in FIG.
A tubular enclosure for the 0, 22 and the connectors 32, 32 is formed. As shown, the closure member 38
The main body portion (curved portion) 44 is partially cylindrical in cross section, but may have another structure within the scope of the present invention.

The electrically insulating means I has a plastic state, and when introduced into the closure member 38 in the plastic state, the small insulated feeder conductors 28 and 30, the lead wire 20,
22 and takes the form of a grout-like material adapted to contain around connectors 32, 32. The hardening of the grout-like material results in the aforementioned components being permanently fixed in place and providing insulation. Since this grout-like material is required to have high moisture resistance (waterproofness) as compared with the ceiling, it is desirable to use a one-pack type urethane which can be applied by spray S instead of the plaster used for the ceiling.

As a mounting means for fixing the closure member 38 to the heating panel 17, various other means can be used, but a screw means is usually used.
Screws 50 are inserted into matching screw holes 52 of closure member 38 of FIG. 1 and extend through the plaster or other material of exemplary heating panel 17. The heating panel 17 has a screw 50 between the lead wires 20 and 22 shown in FIGS.
Marker (fixed line) L that indicates the safe site for inserting
Is desirable.

(2) In the present embodiment, the resistance heating wire 12
The connection portion C between the lead wire 20 and the lead wire 22 is covered with the heat-shrinkable tube 60, and the resistance heating wire 12 is covered with the fluororesin 70. (See FIGS. 7 to 8) The connection portion C includes the resistance heating wire 12 and the lead wire 20 (2
In 2), the crimp 61 is used for squeezed connection. When covering the heat-shrinkable tube 60, after covering the connection crimp 61 with the hot-melt type liner 63 that also serves as an adhesive and a seal, after arranging the heat-shrinkable tube 60 before shrinking on the site, heat is applied. Shrink the heat-shrinkable tube. As the heat-shrinkable tube 60, polyethylene, polyvinyl chloride resin or the like that has been stretched to have heat-shrinkability can be used. This heat shrinkable tube 6
Since the connection part is covered with 0, the sealing property (watertightness) of the connection part is improved, so that the waterproof property is increased and the occurrence of an arc when wet can be prevented (improvement in safety. Contribute to).

Further, since the resistance heating wire 12 is covered with the fluororesin 70 having a high melting point such as polytetrafluoroethylene and excellent in chemical permeation resistance, the resistance heating wire 12 is subjected to severe heat and chemical corrosion effects. Resistance to.

Further, it is desirable that the resistance heating wire is made of 815 alloy. Since the 815 alloy has a smaller coefficient of linear thermal expansion and less stress to the heat cycle than the Nichrome wire or the like, the durability of the resistance heating wire 12 is improved.

The layer structure of the heating panel 17 is such that the electric resistance heating wire 12 has a high density mass (Hi
It is embedded in the gh Density Mastic) layer 65, and at least one surface (usually the lower surface side) of that is plaster (gypsum board: Gypsum).
It is desirable that the board) layer 67 is integrally formed from the viewpoint of load resistance. The skin layer 69 is usually made of paper from the viewpoint of printability and wrapping property.

(3) Next, a method for constructing the floor heating structure having the above configuration will be described. (Refer to Figures 1 and 9) First, a heat insulating material (glass wool, foamed styrene, etc.) with a thickness of about 10 cm inside the concrete foundation part B of the building.
19 is pasted on the entire surface. This is because radiant heat does not leak outside the building.

Next, the required amount of heating panel 17 is spread on the leveled ground with the skin layer 69 facing upward.
Here, the required amount means the heat insulation / airtightness /
It is calculated according to the scale.

The spread heating panels 17 are connected in parallel to the electrical supply lines. This connection method is performed in the same manner as in the above ceiling heating system. However, the connector 32 at the connecting portion is coated with a waterproof spray and then the end cap is attached. Here, in the case of floor heating, once installed, it is practically impossible to repair the electric supply wiring after that. Therefore, the electric supply wiring (power supply line 24) should be two or three as shown in the figure. Is desirable. This is because even if one of the power supply lines 24 is cut off, heating can be performed on the remaining lines.

After laying the heating panel 17, sand (or soil mixed with sand) is further laid for about 15 to 50 cm to construct the sand layer 15 (normally smoothed by a bulldozer).
After that, the slab floor 11 of the building is constructed. Also, at this time,
It is desirable to waterproof and cover the entire floor with a special polyvinyl chloride sheet.

The thermostat lead wire 25 is embedded in the slab floor, and the thermostat is installed on the wall portion.
This completes the construction, but if necessary, the lead wire for the high temperature protection device may be connected to the panel surface and the device may be installed on the wall portion.

(4) Next, the mode of use of the above embodiment will be described.

First, in the cold season such as winter, the heating panel 17 is energized. Then, the radiant heat generated from the heating panel 17 heats the sand-filled layer 15 as well as the stratum below the ground surface because the heating panel 17 is located directly or near the ground surface 13, so The inverted dome-shaped heat storage layer 29 is formed. This heat storage layer 29
At the boundary of, there is an equilibrium state with no heat transfer.

The formation of the heat storage layer 29 can be performed by using the nighttime electric power, and the energy can be efficiently used.

When the heating during the daytime is used, the heat storage layer 29 radiates heat to heat the slab floor 11 through the sand layer 15 and radiant floor heating becomes possible. For this reason,
In the daytime, the energization time of the heating panel 17 can be relatively shortened as compared with the case where the heat storage layer 29 is not provided.

The underground temperature distribution display in FIG. 1 shows that when the thermostat temperature is set to 16 ° C.,
Things.

[0047]

The floor heating structure and its construction method of the present invention are floor heating structures for warming a room by radiant heat from the floor, and between the ground surface of the slab floor (ground),
A sand layer is formed, directly or near the ground surface of the sand layer,
With the configuration characterized in that a predetermined number of heating panels are laid, the following actions and effects are exhibited.

In the cold season, the heating panel is energized. Then, the radiant heat generated from the heating panel is because the heating panel is located directly on or near the ground surface,
As the sand-filled layer is warmed, the stratum below the ground surface is also warmed to form an inverted dome-shaped heat storage layer.

Therefore, it is possible to perform heat storage type floor heating mainly by using the surplus nighttime electric power. Therefore, the present invention is
In order to obtain the same heating effect, the time during which the heating panel is energized in the daytime can be relatively shortened, which greatly contributes to energy saving.

[Brief description of drawings]

FIG. 1 is a model diagram showing an example of a floor heating structure of the present invention.

FIG. 2 is a plan view of an electric heating panel assembly used in an embodiment of the present invention.

FIG. 3 is a perspective view of the connector used in FIG. 2 when the connector is unlocked.

FIG. 4 is a perspective view of the same when locked.

FIG. 5 is a partially cutaway perspective view showing a state in which a closure member is attached to a heating panel.

FIG. 6 is a partial plan view of the same.

FIG. 7 is a side view showing a connection portion between the resistance heating wire and the lead.

8 is a sectional view taken along line 8-8 of FIG.

FIG. 9 is a plan view showing an example of power supply line wiring in the construction method of the present invention.

[Explanation of symbols]

 10 Heating Panel 11 Slab Floor 12 Resistance Heating Wire 13 Ground Surface 15 Sand Layer 17 Heating Panel 20, 22 Lead Wire 24 Feeding Wire 32 Connector 38 Closure Member 60 Heat Shrinkable Tube C Resistance Heating Wire and Lead Wire Connection I Electrical Insulation means

Claims (3)

[Claims] 1. A floor heating structure for warming a room by radiant heat from a floor surface, wherein a sand layer is formed between the ground surface of the slab floor (ground) and directly or near the ground surface of the sand layer. A floor heating structure characterized in that a predetermined number of electric resistance heating panels are laid. 2. The rectangular heating panel according to claim 1, wherein the electric resistance heating wire is embedded, and a pair of lead wires connected to the electric resistance heating wire is projected from one end surface, and the pair of lead wires. A connector for connecting to a power supply line, and a closure member having a U-shaped cross section for holding and fixing the lead wire and a part of the power supply line together with the connector via an electrically insulating means and sandwiching one end of the heating panel; A connection portion between the electric resistance heating wire and the lead wire is covered with a heat-shrinkable tube, and the electric resistance heating wire is covered with a fluororesin. Underfloor heating structure. 3. A method for constructing a floor heating structure according to claim 1, wherein the ground surface (ground) of a slab floor construction site of a house is leveled, and then a direct or thin sand layer is formed to form a predetermined number of sheets. A method for constructing a floor heating structure comprising laying an electric resistance heating panel, constructing a sand layer on the electric resistance heating panel, and constructing a slab floor on the sand layer.