JP3033815B2 - Snow melting method for roof using snow melting tile - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for melting snow on a roof using snow-melting tiles, which melts snow on the roof by the heat generated by the snow-melting tiles, thereby reducing artificial work such as removing snow.

[0002]

2. Description of the Related Art Conventionally, in order to melt snow accumulated on a roof in winter, a snow-melting tile 1 having an electric heating element is disposed on the entire roof as shown in FIG. A means is employed in which a current is applied to the heating element of the snow-melting tile to cause the snow-melting tile on the entire surface of the roof to generate heat and melt the snow on the roof.

[0003]

In this conventional snow melting means, the snow melting tiles are arranged on the entire surface of the roof, and when the snow is piled on the roof, all the snow melting tiles generate heat and melt the snow, so that the power consumption increases. Needless to say, there is a problem that equipment costs and contract electricity with a power company are also high, and the snow melting cost is extremely high. Accordingly, an object of the present invention is to provide a method for melting snow on a roof with low snow melting cost and high snow melting efficiency.

[0004]

According to the first aspect of the present invention, a ridge side is provided.
Heat generated when power is supplied to a roof inclined from the roof to the eaves side
The snowmelt roof tile with the body and the general roof tile without the heating element
In addition to the mosaic arrangement, the roof eaves and ridge
Is divided into multiple blocks and belongs to each block.
To the heating element of the snow melting roof tile
To melt the snow on the roof
You.

[0005] According to the invention of claim 1, from the ridge side to the eaves side.
Snowmelt tiles and general tiles are individually mosaiced on a sloping roof
The mosaic instead of the entire tile
Since it is performed on the installed snow-melting roof tiles,
Few. In addition, roof eaves and ridges are divided into multiple blocks.
And the heating elements of snow-melting tiles belonging to each block
To energize in block units at the same time
The contracted power with the power company.
Reducing the cost of electrical snow melting
Can be.

[0006]

Next, an embodiment of the present invention will be described. Fig. 1 shows multiple snow-melting tiles 1 on the surface of a gable roof.
FIG. 4 is a layout view showing that the general roof tiles 2 are arranged in a mosaic shape. FIG. 2 is another arrangement diagram in which the snow-melting roof tiles 1 and the general roof tiles 2 are arranged in a mosaic shape.

FIG. 3 is a perspective view showing the entirety of the snow melting roof tile 1 as viewed from the back, and FIG. 4 is a sectional view of the snow melting roof tile 1. As shown in FIGS. 3 and 4, the planar heating element 3 of the snow-melting roof tile 1 is attached to an attachment plate 6 disposed along the back-side curved surface 5 of the roof tile body 4. The heating element 3 is attached to the back curved surface 5 of the tile body 4 with an adhesive or the like. With this configuration, when a current is applied to the sheet heating element 3, the heat generated by the sheet heating element 3 heats the tile body 4. The electric capacity of the planar heating element 3 is 28 watts in this embodiment. However, it is desirable that the electric capacity be determined according to the shape, size, regional characteristics, etc. of the tile. The snow-melting roof tile 1 and the general roof tile 2 include a roof-like member made of pottery, slates, cement, or synthetic resin.

[0008] A lead wire 7 is connected to the planar heating element 3, and a connector 8 is connected to the end of the lead wire 7. The connector 8 is a connector 11 attached to an end of a branch line 10 branched from the main lead wire 9.
Connected to The main lead wire 9 is connected to a snow melting control panel described later, and the sheet heating element 3 of the snow melting roof tile 1 is controlled to generate heat by the snow melting control panel. The snow melting control by the snow melting control panel will be described later.

FIG. 5 is a block diagram of a snow melting control. FIG.
As shown in FIG. 1, a snow melting control panel 12 is provided to control snow melting. This snow melting control panel 12 is a single-phase three-wire system 1
A current is applied to the planar heating element 3 of each of the above-mentioned snow melting roof tiles 1 using 00V / 200V as a power supply. Snow melting control panel 1
2 and the sheet heating element 3 of each of the snow melting roof tiles 1 are electrically connected via the main lead wire 9 as described above.
The main lead line 9 is shown as a circuit A1 to a circuit A26 in FIG. 5, and corresponds to 26 rows of positions A to Z on the roof surface shown in FIGS. The planar heating elements 3 of each of the snow melting roof tiles 1 arranged in each row are electrically connected to each of the main lead wires indicated by the circuits A1 to A26.

[0010] The snow melting control panel 12 is a micro computer.
And a programmable sequencer or the like as a central unit.
A snow amount detection signal from the snow sensor 21 is used.
It should be noted that, other than using the snow sensor 21 as a means for detecting snow, a device capable of detecting snow, such as a CCD camera, may be used. Alternatively, snow melting may be started by turning on a manual switch while watching the snow.

[0011] After the snow melting control system is configured as described above, current is applied to the planar heating elements 3 of each of the snow melting roof tiles 1 arranged in a mosaic shape, so that the snow melting proceeds as follows. . (1) The snow in contact with the surface of the snow-melting tile 1 is melted by the conduction heat from the snow-melting tile 1, and a cavity S is formed between the surface of the snow-melting tile 1 and the snow (roof snow) as shown in FIG.
Occurs. (2) The cavity S is further enlarged by radiation from the snow-melting roof tile 1 and thermal convection in the cavity S. (3) On the surface of the snow-melting tile 1, the cavities S of the snow accumulation become larger due to the heat generated by the snow-melting tile 1, while on the upper surface of the snow accumulation, the snow is gradually increased due to the natural snow melting due to the amount of heat generated by natural energy such as solar radiation and temperature. The thickness becomes thin, and on the snow surface,
Eventually a hole will be formed. (4) As the snow-covered tile 1 generates heat, the snow-covered cavity S becomes larger, so that the snow-covered snow easily slides down the slope of the roof, and the entire snow-covered shape is deformed.
The snow-covered cavity S collapses or collapses. (5) As the state of (4) proceeds, the entire snow cover slides on the roof slope and moves toward the eaves. Therefore, the positions A, B,
All rows C are provided with the snow melting roof tiles 1 so that the snow that has moved in the direction of the eaves is quickly melted.

The above-mentioned snow melting situation will be supplementarily described. If the snow on the roof surface moves appropriately or the shape changes, the snow melting is promoted. This is presumed that if the state of contact between the surface of the snow-melting roof tile 1 and the snow cover changes appropriately, heat conduction from the snow-melting roof tile 1 to the snow cover is promoted.

Further, since the snow-melting tiles 1 are arranged on the roof surface in a mosaic shape, the snow-covered bottom surface which directly contacts the snow-melting tiles 1 is melted in a mosaic shape, and a direction perpendicular to the inclination direction of the roof surface, that is, a horizontal direction. Can weaken the connection of snow in the direction,
The snow easily slides down the slope.

[0014] With the progress of snow melting, the snow falls along the roof slope and gradually slides down from the ridge side toward the eaves, so that the amount of heat of snow melting can be reduced as going up the ridge direction. Therefore, even if the number of the snow-melting roof tiles 1 is reduced along the ridge direction, the snow-melting effect does not decrease. Therefore, when arranging the snow-melting tile 1 in a mosaic shape on the roof surface, the general tile 2
By reducing the ratio of the snowmelt tile 1 to the roof, the snowmelt of the entire roof advances evenly. Experiments have confirmed that the snow-melting process can be sufficiently performed even if the snow-melting tile of the entire roof is made up to 60% of the entire roof and the remaining is a general tile.

Next, various current control patterns are used for melting snow.
Can be considered. That is, as shown in FIG. 1 and FIG. 2, as an example of an energizing pattern for the sheet heating element 3 of the snow-melting tile 1 arranged in a mosaic form in the rows A to Z of the roof surface, the position B of the roof surface , C, D, E rows are a block, roof position F,
Rows G, H, and I are b blocks, and positions J, K, L,
Row M is block c, roof position N, O, P, row Q is d
Blocks, rows R, S, T, and U on the roof surface are classified as e blocks, and rows V, W, X, and Y on the roof surface are classified as f blocks. On the other hand, energization is performed in block units at set time intervals.
At this time, row A (rows A to D in some cases), that is, the snow melting roof tiles 1 in the eaves portion often have "icicles" and "suga leaks" at the eaves, or the snow covered along the roof slope. Because it slides down and accumulates on the eaves side, it is desirable to generate heat continuously until snow melting is completed.

Of course, the present invention is not limited to the above-described method of determining the blocks a to f. Various blocks may be set and the snowmelt tiles 1 belonging to each block may be energized sequentially in block units.

In order to reduce the contract power concluded with the power company, it is necessary to reduce the number of snow-melting roof tiles 1 that are energized at the same time. It is desirable to adopt a sequence energization in which block energization is performed on the planar heating element 3 of the roof tile 1 at set time intervals.

Next, the snow melting ability of the present embodiment will be examined. The conditions for this study are as follows: (1) Snow melting amount for one snow treatment = 40 cm (2) Number of days for one snow melting process = 2.5 days (3) Capacity of sheet heating element of one snow melting tile = 28 Watt (4) An average of 16 tiles are laid on one square meter of the roof, and 60% of the tiles are snow-melting tiles, and the electricity supply rate to the snow-melting tiles is 37%.

Under the above conditions, the amount of snow melting by the snow melting roof tile,
The snowmelt amount due to natural energy and the snowmelt processing ratio of the snowfall amount will be described. (1) Amount of snowmelt by snow-melting tile One sheet of snow-melting tile has a surface heating element capacity of 28 watts, snow-melting snow cover volume of 40 cm, snow-melting processing days of 2.5 days, roof tiles per square meter. Assuming that 60% of the 16 sheets are snow-melting tiles and that the electricity supply rate to the snow-melting tiles is 37%, the amount of snowmelt = 28 W / sheet x 16 sheets / m2 x 60% (laying rate of snow-melting tiles) x 37% Rate) × 90% (thermal efficiency) × 47.5
h (2.5 days of snow melting power) x 860 cal / wh
$ 0.16 g / cm3 x 10000 cm2 / m2
× 80 cal / g｝ = 28.6 cm. However, 0.16 g / cm3 is snow density and 80 cal / g is heat of fusion. In the above formula, $ 0.16 g / cm3 × 10000 cm2
/ M2 × 80 cal / g} indicates the amount of heat required to melt 1 cm of snow covered by an area of 1 square meter. (2) Snowmelt due to natural energy Average = 3.9 cm / day x 2.5 days x 1.15 (promotion rate) = 11.2 cm (3) Snowfall 40 cm-above (1)-above (2) = 40-28.6-1
From the calculation of 1.2 = 0.2 cm or more, the following snowmelt ratio is obtained. Amount of snowmelt by snow-melting tile 28.6cm (71.5%) Amount of snowmelt by natural energy 11.2cm (28.0%) Amount of snowfall 0.2cm (0.5%) 40.0cm (100.0%)

As described above, according to the embodiment of the present invention, by arranging the snow-melting tiles 1 on the roof surface in a mosaic shape, the snow-covered bottom surface directly contacting the snow-melting tiles 1 is melted in a mosaic shape. , The direction perpendicular to the roof slope,
That is, the connection of the snow in the lateral direction can be weakened, and the snow easily slides down the slope. Therefore, the effect of promoting snow melting is increased. In addition, when arranging the snow-melting tiles 1 on the roof surface in a mosaic form, by increasing the arrangement ratio of the snow-melting tiles 1 per unit area to the eaves side, it is possible to effectively melt the snow accumulated on the eaves side. Can be. Furthermore, if the energization of the snow-melting roof tiles 1 is performed sequentially in units of blocks, the energization current value in the same time zone can be reduced, so that the contract power concluded with the power company can be reduced. . For this reason, it is possible to reduce the electricity fee for snow melting.

[0021]

According to the first aspect of the present invention, the amount of electric power used is reduced.
And at the same time
The current carrying value is reduced, and the contract power with the power company is reduced.
Can be done. As a result, electricity rates are lower,
This has the effect of reducing snow melting costs.
You.

[Brief description of the drawings]

FIG. 1 is a mosaic layout of snow-melting tiles and general tiles on a roof surface.

FIG. 2 is another mosaic arrangement diagram of a snow-melting tile and a general tile on a roof surface.

FIG. 3 is a perspective view showing the entirety of the snow-melting tile viewed from the back.

FIG. 4 is a sectional view of a snow melting roof tile.

FIG. 5 is a snow melting control block diagram.

FIG. 6 is an explanatory diagram showing a process of snow melting.

FIG. 7 is a layout view of a snow-melting tile on a conventional roof surface.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Snow melting roof tile 2 General roof tile 3 Planar heating element 12 Snow melting control panel

Continuation of the front page (72) Inventor Masayuki Minowa 79, Takiharu-cho, Minami-ku, Nagoya-shi, Aichi 79 Toenec FS Research Laboratories Co., Ltd. (56) References Bikai 3-5862 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) E04D 1/30 603 E04H 9/16 E04D 13/00

Claims (1)

(57) [Claims] (1) A roof is inclined from the ridge side to the eave side.
A snow-melting roof tile with a heating element that generates heat when
The general roof tiles that can not be installed are individually arranged in a mosaic
In addition, the eaves and ridges between the roofs are divided into multiple blocks,
For the heating element of the snow-melting tile belonging to each block
By energizing the blocks in order, the snow on the roof
Of snow on roof using snow-melting tiles, characterized by melting snow
Melting method.