JPH01239272A - Snow melting device for roof - Google Patents

Abstract

PURPOSE:To efficiently melt snow by connecting an indoor hot air blower to a blower duct in an attic and the duct to communicate with a ventilating path, comprising a roof board and a heat insulating material, and laying a tile directly on the roof board. CONSTITUTION:When it is necessary to remove snow, a hot air blower 1 is actuated, feeding hot air from a blower duct 2 through a joint 10 to a ventilating path 4 formed by a roof board 3 and a heat insulating material). Next the hot air, when it moves from a side of the edge of the eaves to a side of the ridge, leaks out from each small hole 5 of the roof board 3 to its upper surface, and the hot air, while it warms a tile 14 from a bottom surface side, is blown to snow, piling on the tile 14, from its overlapping clearance. Subsequently, roof snow is melted from a bottom layer side by heat of the hot air and the warmed tile 14. Further rainwater or the like, when it is blown onto the roof board 3 from the clearance of the tile 14, drops down on the heat insulating material 7 from the small hole 5, being allowed to flow along a bottom wall of the heat insulating material 7 and discharged from a drain hole 16.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention melts and removes snow that has fallen on a roof,
The present invention relates to a roof snow melting device that eliminates the need for snow removal work, which is a harsh labor and is accompanied by the risk of falling.

[Conventional technology]

As is well known, in areas with heavy snowfall, a large amount of snow accumulates on roofs every year, so in order to prevent damage to the house from the weight of the snow, the roofs were repeatedly cleared of snow while keeping an eye on snowfall conditions. Since this snow removal work is a severe work that involves the risk of slipping and falling, various snow melting devices are used to eliminate the need for snow removal work.

For example, hot air generated by a boiler or the like is sent into the attic to heat roofing components through roofing boards, waterproof sheets, etc.
There was one that used the heat from the roofing members to melt the snow on the roof. There was also a system in which planar heating elements were spread over the roofing boards to warm the roofing members, and the heat was used to melt snow on the roof.

[Problem to be solved by the invention]

However, with the above-mentioned snow melting device that blows hot air into the attic to warm the roofing components, when tiles are used as the roofing component, the tiles have low thermal conductivity and are difficult to heat, so it takes a long time after the device is activated before snow melting begins. The disadvantage is that it takes time,
In addition, extra heat is required to heat the attic, roof boards, etc., and hot air is wasted away from ventilation holes, etc.
Thermal efficiency for melting snow was poor. In addition, even with snow melting equipment that uses planar heating elements, it takes time to melt snow for the same reason in the case of tiled roofs, and during that time a considerable amount of heat energy escapes to the attic etc. through the roofing boards etc. Thermal efficiency was poor.

As mentioned above, all of the conventional snow melting devices have the drawbacks of not being able to melt snow quickly, and having poor thermal efficiency and increasing costs. For this reason, manual snow removal work is still widely performed, and cleaning up the snow that has been lowered under the eaves is also a nuisance.

SUMMARY OF THE INVENTION The present invention has been made based on the above-mentioned circumstances, and an object of the present invention is to provide a roof snow melting device that quickly and efficiently melts roof snow and eliminates the need for snow removal work.

[Means to solve the problem]

To achieve the above object, the roof snow melting device according to the present invention connects a hot air fan installed indoors to a ventilation duct installed in the attic, and also connects a roofing board having a large number of small holes and between each rafter on its lower surface. A ventilation path along the flow direction is formed with a groove-shaped heat insulating material provided in the roof, a ventilation duct is communicated with each ventilation path, and tiles are laid directly on the roofing board. be.

[For production]

In the roof snow melting device according to the present invention, warm air leaking from the overlapped portion of the tiles blows directly onto the snow that has fallen on the tiles from the lower layer side, melting the snow. Furthermore, since the ventilation passage formed on the lower surface of the roof board is surrounded by a heat insulating material on the lower surface and both sides, heat is transmitted only upward from the roof board, warming the tiles. Furthermore, the hot air that passes through the small holes in the roofing board from the ventilation duct then leaks from the overlapped area to the top surface of the tile, warming the tile from the bottom side and melting snow using the tile as a heat medium.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS The roof snow melting device according to the present invention will be specifically described below with reference to the drawings. The main components of this device are a hot air fan 1 installed indoors, a ventilation duct 2 installed on the eaves side of the attic, and a ventilation path 4 formed on the underside of the roof board 3. The shedding board 3 has a large number of small holes 5, and between the rafters 6 and 6 on the lower surface of the shedding board 3, a heat insulating material 7 made of Styrofoam or the like is formed into a concave groove along the flow direction from the eaves to the ridge. A ventilation passage 4 is formed by the field board 3 with the small hole 5 and the groove-shaped heat insulating material 7. A vent 9 is provided in the bottom wall 8 on the eaves side of the heat insulating material 7, and the ventilation duct 2 is connected to this vent 9 via a joint 10.
1 is provided so that warm air flows smoothly through the ventilation path 4 from the eaves side to the line side. In addition, the end of the ventilation passage 4 on the eaves side is closed with a lower end wall 12 made of expanded polystyrene formed integrally with the groove-shaped heat insulating material 7, and similarly, the end of the ventilation passage 4 on the line side is closed with an upper end wall made of expanded polystyrene (Fig. (not shown) is blocked. and,
A tile 14 is laid directly on the roof board 3, and a mend 15 made of glass wool or the like is inserted between the roof board 3 and the tiles 14 at the roof edge, that is, at the eaves, ridge, and gable. Furthermore, a drainage hole 16 is provided at the end of the bottom wall 8 of the heat insulating material 7 on the side of the eaves. Note that a waterproof sheet 17 is laid between the roof board 13 and the rafters 6, and its both side edges are provided along the inside grooves of the side walls 18 of the heat insulating material 7 on both sides of the rafters 6. Also, the reason why the side wall 18 of the groove-shaped heat insulating material 7 is inclined inward on the bottom wall 8 side and the width between the side walls 18 and 18 is narrow is because this heat insulating material 7 is placed between the rafters 6, 6 This is done in consideration of convenience when fitting from above.

Further, FIG. 3 shows another embodiment of the present invention, which has a slight difference in the configuration of the ventilation passage 4 from the previous embodiment. That is, the lower surface side of the rafter 6 is closed with a plate material 19 made of plywood or the like, and the opposing surface of the adjacent rafter 6°6 and both rafters 6, 6 are closed.
A heat insulating material 7 made of a soft foamed polyurethane sheet or the like is installed across the upper surface of the board material 19 in between, and this groove-shaped heat insulating material 7 provided from the eave part to the ridge part and the small hole 5 in the upper surface thereof. A ventilation passage 4 is formed with the base plate 3. In addition, in the case where the upper end extends indoors, such as with an eave roof, it is not necessary to insert the mend 15 between the roof tile 14 at the upper end and the roofing board 3. Further, when decorative rafters are provided at the eaves, the ventilation passages 4 are not formed up to the eaves, so that the heat insulating material 7 is not exposed between the decorative rafters.

Furthermore, in that case, a sheath board without small holes 5 is used on the decorative rafters, and the mend 15 is also inserted between the edge of the eaves side of the temporary sheath 3 with small holes 5 and the tiles 14.

The device of the present invention is configured as described above, and when a large amount of snow has fallen on the roof and conventionally would require snow removal, the hot air fan 1 is activated and the air blower duct 2 is operated.
From there, hot air is sent into the ventilation passage 4 via the joint 1o. The warm air that has entered the ventilation duct 4 moves from the eaves side to the line side along the flow direction, and in the process leaks uniformly from each small hole 5 of the roofing board 3 to the top surface of the roofing board 3, causing the tiles 14 to The snow is heated from the bottom side and is blown directly onto the snow that has fallen on the tiles 14 through the gaps where the tiles overlap. Then, the snow on the roof quickly melts from the lower layer due to the warm air and the heat from the heated tiles.

It is not necessary to melt all the snow on the roof; if the snow has decreased to the point where there is no risk of damaging the house, you can use the hot air
All you have to do is stop it.

It should be noted that it is better to use an electric heater for the warm air fan 1 than one that uses hydrocarbon fuel such as gas or kerosene, since there is no risk of condensation inside the device. In addition, when rainwater etc. blows into the roofing board 3 through the gaps between the tiles 14, it falls from the small holes 5 of the roofing board 3 onto the groove-shaped insulation material 7, and the bottom of the insulation material is heated. The water flows up the wall 8 and is discharged from the drain hole 16 provided at the end of the eaves side of the bottom wall 8.Furthermore, the upper surface of the rafter 6 is covered with a waterproof sheet 17 that spans the side walls 18 of the insulation material 7 on both sides. Since it is covered, rainwater that falls onto the rafters 6 through the small holes 5 in the sheathing board 3 also flows into the insulation material 7. In this way, rainwater leakage to the attic is prevented. The hot air sent between the roof tiles 15 is blocked by the mend 15, so it does not leak out from the eaves or gables, and is always blown onto the roof tiles 14 to melt the snow.

〔Effect of the invention〕

Since the roof snow melting device according to the present invention blows hot air directly onto the snow accumulated on the roof through the gaps between the overlapping tiles as described above, the snow on the entire roof can be melted uniformly and quickly. In addition, in this device, the hot air fan and ventilation duct are all installed indoors, and the bottom side of the roof board is covered with heat insulating material.
The hot air does not leak to other areas, and together with the roof tiles heated by the hot air, snow can be melted efficiently. Therefore, residents do not have to carry out the heavy snow-removal work that involves the risk of slipping and falling, but only need to operate the indoor hot air fan while keeping an eye on the snow situation. Furthermore, since this device forms a ventilation path between the rafters on the lower surface of the roof board, almost no changes are required to the construction of the house.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view along the flow direction of a house equipped with the roof snow melting device according to the present invention, Fig. 2 is a cross-sectional view in the column direction of the main part thereof, and Fig. 3 is a schematic diagram showing a similar example of the device of the present invention. FIG. 1... Warm air fan, 2... Air duct, 3... Field board, 4... Ventilation path, 5... Small hole, 6... Rafter, 7...
...Insulation material, 14...Tile base plate

Claims (1)

[Claims] 1. A hot air fan (1) installed indoors is connected to a ventilation duct (2) installed in the attic, and a large number of small holes (5)
The field board (3) with
) A ventilation path (4) along the flow direction is formed with the groove-shaped heat insulating material (7) provided between them, and the ventilation duct (2) is communicated with each ventilation path (4). tiles directly on top (14)
A roof snow melting device characterized by having: