JP2001311266A - Roof equipped with solar battery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a roof equipped with a solar battery, which is prevented from storage of water generated by snow melting at an eaves edge portion of a roof surface. SOLUTION: A solar battery panel 21 for converting solar energy into electric power is arranged on the roof at a location other than the eaves edge portion along an eaves edge 12 of the slant roof surface 13, and snow melting heaters 31 to 33 for melting snow on the roof surface 13 are arranged on the eaves edge portion of the roof surface 13. Thus, heat generated by the snow melting heaters 31 to 33 melts snow which would otherwise pile up at the eaves edge portion of the roof surface 13. Further, heat generated by application of electric current to the solar battery panel 21 melts snow which would otherwise pile up on an upper surface of the solar battery panel 21. Therefore, snow does not pile up on the eaves edge portion, and snowmelt generated by the solar battery panel 21 and the snow melting heaters 31 to 33 is drained from the roof surface 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roof with solar cells provided with a solar cell panel for converting sunlight energy into electric power at a portion other than the eaves along the eaves of an inclined roof surface.

[0002]

2. Description of the Related Art Hitherto, a roof with solar cells that converts sunlight into electric power using a plurality of solar cell panels arranged vertically and horizontally on a roof surface has been used. The solar cell panel is configured to include a solar cell that converts sunlight into electric power and a frame-shaped frame provided on the periphery. In such a solar panel, during snowfall when sunlight is blocked by clouds,
By supplying external power to the solar cell, the solar cell generates heat and melts snow.
-271860). In such a solar panel, if the heat conduction of the solar cell or the frame is poor,
The snow falling on the top of the frame hardly melts.
For this reason, the water generated by the melting of snow permeates the snow accumulated on the upper surface of the frame, freezes on the upper surface of the frame, and the frozen ice blocks the snow that has become the water, and the upper surface of the solar cell panel There is a risk that water will accumulate. In view of this, the present applicant has proposed a roof with solar cells in which a plurality of solar cell panels with improved heat conduction of solar cells and frames are arranged so that water does not accumulate on the upper surfaces of the solar cell panels (Japanese Patent Application No. 2002-214,086). Flat 11-
No. 261934).

[0003]

In such a roof with solar cells, when there is a portion where no solar panel is installed on the eaves side of the roof surface, snow falling on the roof surface on the eaves side is almost melted. Absent. For this reason, the water generated by the snow melting of the solar cell panel soaks into the snow accumulated on the roof surface on the eaves side and freezes on the roof surface, and the frozen ice causes the water generated by the snow melting to flow. There is a danger that water will collect on the roof surface on the eaves side.

[0004] It is an object of the present invention to provide a roof with solar cells, in which water generated by snow melting is prevented from accumulating on the eaves of the roof surface.

[0005]

According to the present invention, referring to the drawings, a solar cell for converting solar energy into electric power is provided on a portion other than the eaves along the eaves 12 of an inclined roof surface 13. The solar cell-equipped roof 10 provided with a panel 21, wherein the eaves portion of the roof surface 13 is provided with snow melting heaters 31 to 33 for melting snow on the roof surface. Roof with batteries. In the present invention, since the snow generated by the snow melting heaters 31 to 33 melts the snow which is going to fall on the eaves of the roof surface 13, no snow is accumulated on the eaves. In addition, when an electric current is applied to the solar cell panel 21 to cause the solar cell panel 21 to generate heat, the heat dissolves snow that tends to fall on the upper surface of the solar cell panel 21. And since the snow does not accumulate on the eaves, the solar panel
Melt water from the heater 21 and the snow melting heaters 31 to 33 is drained from the roof surface 13, so that water does not accumulate on the roof surface 13.

In the above description, the snow melting heater is a planar heater formed in a planar shape, and the eaves portion of the roof surface is covered with a roofing material 14, and the back side of the roofing material 14 is covered with the snow melting heater. Preferably, a heater 31 is provided. As described above, if a planar heater formed in a planar shape is employed as the snow melting heater 31, heat is uniformly generated from the entire heater, so that the heating wire is provided in a meandering manner like a linear heater. In contrast, the roofing material 14 can be uniformly heated, and the snow that is going to fall on the roofing material 14 can be reliably melted. In addition, if the size of the snow melting heater 31 is increased, the calorific value of the snow melting heater 31 increases, and the snow melting heater 31 generates a large amount of heat. The temperature of the roofing material 14 is less likely to decrease.

[0007] Further, a planar heater formed in a planar shape is provided as the snow melting heater, and a gap 16 is provided between the lower ground surface 4 of the roof surface 13 and the solar cell panel 21.
A face door member 40 for closing the opening 16A on the eaves side of the gap 16 is provided, and on the back side of the face door member 40, the snow melting heater 32 is provided.
Is desirably provided. As described above, if a planar heater formed in a planar shape is employed as the snow melting heater 32, heat is uniformly generated from the entire heater, so that the heating wire is provided in a meandering manner like a linear heater. No,
The face door member 40 can be uniformly heated, and the snow that is going to fall on the face door member 40 can be reliably melted. Further, as described above, the snow melting heater 32 is used.
When the size of the snow melting heater 32 is increased, the amount of heat generated by the snow melting heater 32 increases, so that the snow melting heater 32 generates a large amount of heat. Is difficult to fall.

Further, it is desirable that the face door member 40 is formed in a flat plate shape, and is disposed so as to be inclined from the eaves edge of the solar cell panel 21 to the surface of the roofing material 14. In this way, water generated by the snow melting of the solar cell panel 21 can smoothly flow down the surface of the roof member 14 of the eaves part along the surface of the face member 40, and the solar cell panel 21 and the eaves part of the eaves part The water can be prevented from entering the boundary with the roofing material 14.

The face door member 40A includes an upper joint portion 41A joined to the solar cell panel 21 and the roofing material.
While connecting the lower joint 42A joined to the surface of 14 and these upper joint 41A and lower joint 42A,
It is desirable to have a stepped portion 43A projecting from the lower joint portion 42A. If the tip of such an upper joint portion 41A is made to protrude from the rising portion 44A of the stepped portion 43A, the tip of the upper joint portion 41A becomes a drain 45A, and water generated by melting the snow of the solar cell panel 21 is drained. From 45A, it falls on the surface of the roofing material 14 at the eaves portion, and it is possible to prevent the water from entering the boundary between the solar cell panel 21 and the roofing material 14 at the eaves portion. Further, if a ventilation hole is provided at the rising portion of the stepped portion 43A, the outside air can be sent from the ventilation hole to the gap 16 between the solar cell panel 21 and the base surface 4,
The solar cell panel 21 heated by sunlight can be cooled.

Further, the snow melting heaters 31 and 32 are electric heaters, and transmit the electric power generated by the solar cell panel 21 to the lower ground 4 on the roof surface 13 on which the solar cell panel 21 is provided. Hole 4A through which the electric wire 21A is inserted
It is preferable that electric wires 31A and 32A for supplying electric power to the snow melting heaters 31 and 32 from indoors are inserted through the insertion holes 4A. In this way, the electric wires 31A and 32A of the heaters 31 and 32 for melting snow are
Can be inserted into the back of the roof of the roof 10 from the common insertion hole 4A, so that the electric wires 31A and 32A of the snow melting heaters 31 and 32 can be inserted.
It is no longer necessary to provide a separate insertion hole for inserting
The wires 31A, 3A of the heaters 31 and 32 for melting snow are hardly changed without changing the structure of the roof surface 13 on which the solar cell panel 21 is provided.
2A wiring path can be secured.

The snow melting heater 33 is a planar heater formed in a planar shape, and a nose cover member 50 for concealing the eaves-side end surface is provided on the eaves-side end surface of the roof surface 13. It is desirable that the snow melting heater 33 be provided on the back side of the fascia. In this way, the fascia member 50 is heated by the snow melting heater 33, so that the snow that tends to fall on the surface of the fascia member 50 is melted, and the snow is generated by the snow melting of the solar cell panel 21 and the like. The generated water is not re-frozen on the eaves-side end face of the roof surface 13, and the formation of icicles on the eaves-side end face can be prevented. Also,
As described above, if the size of the snow melting heater 33 is increased, the calorific value of the snow melting heater 33 increases, and the snow melting heater 33 generates a large amount of heat. However, the temperature of the fascia member 50 does not easily decrease.

Further, the snow melting heater 33 is an electric heater, and the nose cover member 50 includes the snow melting heater 33.
Insertion hole 52 through which the electric wire 33A for supplying power to the
It is desirable that A is formed. In this way, even if the insertion hole 52A is formed in the fascia member 50, the waterproof structure of the roof 10 is not affected. Wiring routes can be secured, and the wires 33A of the snow melting heater 33 can be
The path leading to the back of the hut becomes the shortest distance, and the snow melting heater 33
Wiring work of the electric wire 33A can be easily performed.

Further, it is desirable that a heat insulating material 15 for blocking heat is provided on the back side of the snow melting heater 31.
In this way, the heat generated by the snow melting heater 31 is prevented from escaping from the back side of the snow melting heater 31 by the heat insulating material 15, the heat loss is reduced, and the roofing material 14 is efficiently warmed by the snow melting heater 31. .

[0014]

Embodiments of the present invention will be described below with reference to the drawings. First Embodiment FIG. 1 shows a building 1 according to a first embodiment of the present invention. The building 1 is a unit-type building constructed by combining a plurality of building units 3 formed in a box shape on a foundation 2. The roof 10 of the unit building 1 is located on both sides of the ridge 11,
A gabled roof having a roof surface 13A facing south and a roof surface 13B facing north is formed by arranging a plurality of flat roof panels 9 extending up to 12 along the ridge 11. The part of the roof surface 13 other than the eaves is a solar cell panel 21 which is a roofing material for converting solar energy into electric power.
The eaves along the eaves 12 of the roof surface 13 are covered with ordinary roofing materials 14. As a result, the roof 10
The roof is equipped with solar cells.

The roof panel 9 is, as shown in FIG.
A frame 6 in which a frame member 5 such as a channel steel or a square steel pipe is assembled in a square frame shape, and a field base plate 7 stuck on the frame 6
And a waterproof sheet 8 such as a roofing attached to the base plate 7. The upper surface of the roof plate 7 of the roof panel 9 is the lower ground surface 4 of the roof surface 13. Roof surface
The 13 is provided with a plurality of support members 23 extending along the inclination direction of the roof surface 13 and formed in a rail shape. The solar cell panel 21 has edges on both sides along the inclination direction of the roof surface 13 supported by the support member 23. The support member 23 has a leg 23A attached to the base surface 4 and a groove 23B having an upper opening. Groove 23B is the eaves
The edge on the 12 side is arranged so as to protrude toward the eaves 12 side from the leg 23A. Below the protruding portion of the groove 23B, an upper end portion of a heat insulating material 15 described later enters the back surface side. The solar cell panel 21 has a solar cell 22 that converts sunlight energy into electric power. Solar panels 21
Is provided with an electric wire 21A for transmitting the electric power generated by the solar cell panel 21. This wire 21A
The roof 10 is inserted into the back of the roof 10 through an insertion hole 4A formed in the base surface 4 located immediately below the solar cell panel 21. Between the solar cell panel 21 and the base surface 4,
A gap 16 is formed. Here, the solar panel 21
Supplies electric power from a commercial power supply to the solar cell 22 at the time of snowfall, thereby causing the solar cell 22 to generate heat and also serves as a heater for melting snow.

The above-described heat insulating material 15 for blocking heat is attached to the lower ground 4 of the eaves portion of the roof surface 13. On the upper surface of the heat insulating material 15, a snow melting heater 31 for melting the snow of the roofing material 14 is provided. The roofing material 14 described above is provided on the upper surface of the snow melting heater 31. This roofing material
Numeral 14 is formed by sheet metal or the like. Snow melting heater 31
Is an electric heater that is formed in a planar shape and generates heat when electric power is supplied from a commercial power supply. The heaters 31 for snow melting are arranged in three rows along the inclination direction of the roof surface 13. The snow melting heater 31 is provided with an electric wire 31A for supplying electric power from a commercial power supply. This wire 31A
Through the insertion hole 4A, along with the electric wire 21A provided on the solar cell panel 21, it is inserted into the back of the hut of the roof 10.

Among the solar panels 21 arranged on the roof surface 13, the solar panel 21B disposed closest to the eaves 12 has a gap 16 formed between the solar panel 21 and the ground plane 4. A face door member 40 for closing the opening 16A on the eaves side is provided. The face door member 40 is formed in a flat plate shape, and
It is a long member extending along 12. The face door member 40 is disposed so as to be inclined from the eaves edge of the solar cell panel 21 to the surface of the roofing material 14. As a result, the thaw water generated due to the melting of the solar cell panel
Along the surface of the roofing material 14 to smoothly flow down. On the back surface of the face door member 40, a snow melting heater 32 for melting the snow of the face door member 40 is provided. This snow melting heater 32, like the snow melting heater 31,
The electric heater is formed in a planar shape and generates heat when supplied with electric power from a commercial power supply. Heater 32 for melting snow
Are arranged over the entire length of the face door member 40.
These snow melting heaters 32 are attached to the back surface of the face door member 40 with a double-sided tape or the like. The snow melting heater 32 is adapted to the size of the face door member 40. Snow melting heater
32 is provided with an electric wire 32A for supplying electric power from a commercial power supply. This electric wire 32A is inserted into the through hole 4A
From the electric wire 21A of the solar cell panel 21 and the heater 31 for snow melting
Along with the electric wire 31A of the roof 10, is inserted into the back of the hut of the roof 10.

A nose cover member 50 for covering the eaves-side end surface is provided on the eaves-side end surface of the roof surface 13. The fascia member 50 includes an upper covering portion 51 that covers the end surface of the roofing material 14, and a roof covering member 51.
And a lower covering portion 52 that covers the ten base materials. A plurality of short covering members 52 are arranged along the eaves 12. As shown in FIG. 3, a snow melting heater 33 that melts the nose cover member 50 is provided on the surface of the lower covering portion 52. This snow melting heater 33 includes a plurality of lower covering portions 52.
It is attached with double-sided tape 33B. The snow melting heater 33 is adapted to the size of the lower covering portion 52. The snow melting heater 33 is provided with an electric wire 33A for supplying electric power from a commercial power supply. This wire 33
A is an insertion hole formed in the lower covering portion 52 of the nose cover member 50.
From 52A, it is designed to be inserted into the back of the roof of the roof 10. As a result, the electric wire 33A of the snow melting heater 33 is
The path leading to the back of the hut is the shortest distance. A cover member 53 that covers the snow melting heater 33 is attached to the lower covering portion 52. As the cover member 53, a plurality of short members are arranged along the eaves 12.

Returning to FIG. 1, the building 1 has
In addition to the above-mentioned solar cell panel 21 and snow melting heaters 31 to 33, an electric water heater 69 for supplying hot water into the building 1 and these solar cell panel 21, snow melting heaters 31 to 33 and electric water heater 69 Power supply means 60 for supplying electric power, and a solar panel
An inverter 63 for converting the DC power generated by 21 into AC power, a breaker box 64 provided with a breaker for preventing overcurrent from the solar cell panel 21, and a power supply from the commercial power supply and the solar cell panel 21. A distribution board 65 for supplying a plurality of loads in the building 1 is provided. Power supply means
60 includes a control box 61 connected to the solar cell panel 21 on the southern roof surface 13A, and a connection box 62 connected to the solar cell panel 21 on the northern roof surface 13B. The power supply means 60 is installed inside the cabin behind the roof 10. Inverter 63, breaker box 64 and distribution board
Numeral 65 is installed in a storage or the like provided near the entrance and the entrance in the building 1. The electric water heater 69 is installed at a service entrance or the like in the building 1.

An inverter 63 is connected to the control box 61 and the connection box 62 as shown in FIG. A breaker box 64 is connected to the inverter 63, and a distribution board 65 is connected to the breaker box 64. The control box 61 is for switching between power generation of the solar cell panel 21 and snow melting of the solar cell panel 21. Here, the solar cell panel 21 arranged on the southern roof surface 13A is divided into a plurality of panel groups 24A to 24E grouped into a predetermined number. The control box 61A is connected to the panel groups 24A and 24B, and the control box 61B is connected to the panel groups 24C to 24E. If there is no snow on the roof 10 and solar radiation can be obtained,
The power generated by the solar cell panel 21 is supplied to a plurality of loads in the building 1 via the inverter 62.

The connection box 62 is for collecting the electric power generated by the solar panel 21 on the roof surface 13B on the north side. It should be noted that the roof 13B on the north side does not receive much solar radiation and generates a small amount of power, so that snow melting is not performed. When melting the snow, the solar cell panel 21 is supplied with electric power from a commercial power supply via a magnet switch 67A provided in an electric transmission path 66 connecting the control box 61 and the distribution board 65. Snow melting heater 31 ~
33 is supplied with electric power from a commercial power supply via a magnet switch 67B provided in an electric transmission path 68 connecting the snow melting heaters 31 to 33 and the distribution board 65. Where the roof surface 13
Is provided with an optical snow sensor (not shown) that detects snow on the roof surface 13. This snow sensor
It has a light-emitting part and a light-receiving part, and normally, the light from the light-emitting part is detected by the light-receiving part, and when the light is blocked by the snow and cannot be detected by the light-receiving part, a snow detection signal is output. It is. When the snow sensor detects snow, the magnet switches 67A and 67B are turned on when a snow detection signal is sent from the snow sensor and turned off when the snow melting is completed. The electric water heater 69 consumes a large amount of electric power in melting the snow by the solar cell panel 21 and the snow melting heaters 31 to 33.In order to prevent the breaker from tripping, the electric water heater 69 is operated via the magnet switch 67C only when the snow is not melted. Thus, power is supplied from a commercial power supply.

According to the first embodiment, the following effects can be obtained. That is, since the snow melting heaters 31 to 33 are provided at the eaves where the solar cell panel 21 is not installed, the heat generated by the snow melting heaters 31 to 33 causes the snow to fall on the eaves of the roof surface 13. Melt. In addition, a current is passed through the solar cell panel 21 to cause the solar cell panel 21 to generate heat, and the heat melts snow that is going to fall on the upper surface of the solar cell panel 21. Melt water from the heater 21 and the snow melting heaters 31 to 33 is drained from the roof surface 13, so that water does not accumulate on the roof surface 13.

Further, since the snow heater 31 formed in a planar shape is used, heat is uniformly generated from the entire heater, and unlike the case where the heating wire is provided in a meandering manner like a linear heater,
The roofing material 14, the face door member 40, and the fascia member 50 can be uniformly heated, and the snow that is going to fall on the roof material 14, the face door member 40, and the fascia member 50 can be reliably melted. it can. Also, since the size of the snow melting heater 31 is increased according to the roofing material 14, the face door member 40, and the cover member 50, the calorific value of the snow melting heater 31 increases, and the snow melting heater 31 generates a large amount of heat. As a result, even if the outside air temperature suddenly decreases, the temperatures of the roofing material 14, the face door member 40, and the fascia member 50 do not easily decrease.

Furthermore, since the face door member 40 is disposed in a state of being inclined from the eaves edge of the solar cell panel 21 to the surface of the roofing material 14, water generated by the snow melting of the solar cell panel 21 generates water. Along the surface of the roof of the eaves, and smoothly flows down to the surface of the roofing material 14 at the eaves, thereby preventing the water from entering the boundary between the solar cell panel 21 and the roofing material 14 at the eaves.

The electric wires 31A and 32A of the heaters 31 and 32 for melting snow, respectively.
And the electric wires 21A of the solar cell panel 21 and the electric wires 31A of the heaters 31 and 32 for snow melting.
It is not necessary to separately provide an insertion hole for inserting the A and 32A, and the electric wire of the snow melting heaters 31 and 32 is hardly changed with almost no change in the structure of the roof surface 13 provided with the solar cell panel 21.
Wiring paths for 31A and 32A can be secured.

Furthermore, since the snow melting heater 33 is provided on the nose cover member 50, the nose cover member 50 is heated by the snow melting heater 33, so that the snow that is going to fall on the surface of the nose cover member 50 melts, Water generated by the snow melting of the solar cell panel 21 and the snow melting heaters 31 to 32 does not re-freeze on the eaves-side end surface of the roof surface 13, so that an icicle can be prevented from being formed on the eaves-side end surface.

Further, since the heat insulating material 15 is provided on the back side of the snow melting heater 31, the heat generated by the snow melting heater 31 does not escape from the back side of the snow melting heater 31 by the heat insulating material 15, so that the heat loss is reduced. , Roofing material 14 efficiently heater for snow melting
31 can be warmed.

Further, even if the insertion hole 52A for the electric wire 33A of the snow melting heater 33 is formed in the nose cover member 50, the waterproof structure of the roof 10 is not affected. In addition, the wiring route of the electric wire 33A can be secured without the need to perform the operation, and the path for guiding the electric wire 33A of the heater 33 for snow melting to the back of the hut of the roof 10 becomes the shortest distance.
The wiring work of A can be easily performed.

Since the electric water heater 69 is supplied with electric power from the commercial power supply only when snow melting is not performed, the cut-off current value of the breaker from the commercial power supply is reduced by installing the solar cell panel 21. In this state, the power supply from the commercial power supply can be suppressed, and the breaker can be prevented from frequently tripping.

[Second Embodiment] FIG. 5 shows a second embodiment of the present invention. In the second embodiment, the flat surface door member 40 in the first embodiment is a surface door member 40A having a stepped portion. That is, the face door member
40A is an upper joint 41A joined to the eaves end face of the solar cell panel 21D, a lower joint 42A joined to the surface of the roofing material 14, and connects the upper joint 41A and the lower joint 42A. And a stepped portion 43A protruding from the lower joining portion 42A. The upper joint portion 41A is provided to protrude from the rising portion 44A of the stepped portion 43A toward the eaves 12 side. The tip of the upper joint 41A is a drainer 45 for dropping meltwater generated by snow melting onto the surface of the roofing material 14.
A. A plurality of ventilation holes (not shown) are formed in a rising portion 44A of the stepped portion 43A. This allows the solar cell panel 21 to be cooled by the outside air being inserted into the gap 16 from the ventilation hole. Upper joint 41A
, Lower joint 42A and rising portion 44A of stepped portion 43A
Are provided with snow melting heaters 32, respectively. The electric wires 32A of the snow melting heater 32 are inserted into the back of the roof 10 together with the electric wires 21A of the solar cell panel 21 and the electric wires 31A of the snow melting heater 31 from the insertion holes 4A of the ground surface 4. I have.

According to the second embodiment, the same operations and effects as those of the first embodiment can be obtained, and the following effects can be added. That is, the upper joint 41A
The projecting part from the rising part 44A of the stepped part 43A,
Since the tip of the upper joint portion 41A is a drainer 45A, water generated by melting the snow of the solar cell panel 21 is drained.
From 45A, it falls on the surface of the roofing material 14 at the eaves portion, and it is possible to prevent the water from entering the boundary between the solar cell panel 21 and the roofing material 14 at the eaves portion. Further, since the ventilation hole is provided in the rising portion 44A of the stepped portion 43A, the outside air can be sent from the ventilation hole to the gap 16 between the solar cell panel 21 and the base surface 4, and the solar cell panel heated by sunlight 21 can be cooled.

It should be noted that the present invention is not limited to the above-described embodiment, but includes other configurations that can achieve the object of the present invention, and includes the following modifications. That is, the heater for snow melting is not limited to a planar heater formed in a planar shape, but may be a linear heater provided with a heating wire meandering. If a planar heater is used, as described above,
Since heat is uniformly generated from the entire heater, the roofing material can be uniformly heated, and snow that is going to fall on the roofing material can be reliably melted. Further, the building is not limited to a unit-type building constructed by combining a plurality of box-shaped building units, but a panel-type building in which panels that are structural surface materials for forming floors and walls are combined at a construction site. Alternatively, it may be a building of a framing method in which framing materials such as columns and beams are assembled at a construction site.

[0033]

According to the roof with solar cells of the present invention, the following effects can be obtained. That is, according to the roof with a solar cell according to claim 1, the heat generated by the snow melting heater is:
Because the snow that is going to fall on the eaves of the roof is melted, snow does not accumulate on the eaves. In addition, when a current is applied to the solar cell panel to cause the solar cell panel to generate heat, the heat dissolves snow that tends to fall on the upper surface of the solar cell panel. Since snow does not accumulate on the eaves, snow melt water from the solar cell panel and the heater for melting snow is drained from the roof surface, and water does not accumulate on the roof surface.

According to the roof with the solar cell according to the second aspect, if a planar heater formed in a planar shape is employed as the heater for snow melting, heat is uniformly generated from the entire heater. Unlike the case where the heating wire is meandering like a heater in the shape of a roof, the roofing material can be heated evenly,
The snow that is going to fall on the roofing material can be reliably melted. In addition, if the size of the snow melting heater is increased, the calorific value of the snow melting heater is increased, and the snow melting heater generates a large amount of heat. The temperature can be hardly lowered.

Further, according to the roof with the solar cell according to the third aspect, if a planar heater formed in a planar shape is adopted as the heater for snow melting, heat is uniformly generated from the entire heater. Unlike the case where the heating wire is provided in a meandering manner as in the shape of a heater, the face door member can be uniformly heated, and the snow that tends to fall on the face door member can be uniformly melted. Further, as described above, if the size of the snow melting heater is increased, the calorific value of the snow melting heater increases, and the snow melting heater generates a large amount of heat. Also, the temperature of the face door member can be hardly lowered.

Further, according to the roof with the solar cell according to the fourth aspect, the water generated by the snow melting of the solar cell panel is transmitted along the surface of the face door member and smoothly flows down to the surface of the roofing material at the eaves portion. That is, the water can be prevented from entering the boundary between the solar cell panel and the roofing material at the eaves.

Further, according to the roof with the solar cell according to the fifth aspect, if the tip of the upper joint projects beyond the rising portion of the stepped portion, the tip of the upper joint becomes a drain, and the solar cell The water generated by the snow melting of the panel falls from the drain to the surface of the roofing material at the eaves portion, and can prevent the water from entering the boundary portion between the solar cell panel and the roofing material at the eaves portion. . Further, if a ventilation hole is provided in the rising portion of the stepped portion, outside air can be sent from the ventilation hole to the gap between the solar cell panel and the base surface, and the solar cell panel heated by sunlight can be cooled.

According to the roof with the solar cell according to the sixth aspect, the electric wire of the heater for melting snow can be inserted into the inside of the cabin of the roof from the common insertion hole with the electric wire of the solar cell panel. In addition, there is no need to separately provide an insertion hole for inserting the electric wire of the snow melting heater, and the wiring route of the electric wire of the snow melting heater can be secured without substantially changing the structure of the roof surface on which the solar cell panel is provided.

Further, according to the roof with the solar cell according to the seventh aspect, the nose cover member is warmed by the snow melting heater, so that the snow which is going to fall on the surface of the nose cover member is melted. In addition, water generated by snow melting of the solar cell panel or the like does not freeze again on the eaves-side end surface of the roof surface, and it is possible to prevent formation of an icicle on the eaves-side end surface. Further, as described above, if the size of the snow melting heater is increased, the calorific value of the snow melting heater increases, and the snow melting heater generates a large amount of heat. Also, it is possible to make it difficult for the temperature of the fascia to fall.

According to the roof with the solar battery according to the eighth aspect, even if the insertion hole is formed in the nose cover, the waterproof structure of the roof is not affected. The wiring route of the electric wire can be ensured without any change, and the route for guiding the electric wire of the snow melting heater to the back of the roof becomes the shortest distance, so that the wiring operation of the electric wire of the snow melting heater can be easily performed.

Further, according to the roof with the solar cell according to the ninth aspect, the heat generated by the snow melting heater does not escape from the back side of the snow melting heater by the heat insulating material, so that the heat loss is reduced, and Can be efficiently heated by the snow melting heater.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a building according to a first embodiment of the present invention.

FIG. 2 is a sectional view showing a roof according to the embodiment.

FIG. 3 is an exploded perspective view showing a nose cover member and a snow melting heater according to the embodiment.

FIG. 4 is a circuit diagram showing a power supply unit according to the embodiment.

FIG. 5 is a sectional view showing a second embodiment of the present invention.

[Explanation of symbols]

 4 Underground 4A Insertion hole 10 Roof with solar cell 13 Roof surface 14 Roofing material 15 Insulation material 16 Gap 16A Opening 21 Solar cell panel 21A Electric wire 31-33 Heater for snow melting 31A-33A Electric wire 40, 40A Facade door member 41A Upper joint 42A Lower joint part 43A Stepped part 50 Nose cover member 52A Insertion hole

Claims (9)

[Claims] 1. A roof with solar cells provided with a solar panel for converting solar energy into electric power at a part other than an eaves part along an eaves part of an inclined roof surface, wherein the eaves part of the roof surface is provided. A roof with a solar cell, characterized in that a snow melting heater for melting snow on the roof surface is provided in the portion. 2. The roof with solar cells according to claim 1, wherein the snow melting heater is a planar heater formed in a planar shape, and an eaves portion of the roof surface is covered with a roofing material. A roof with solar cells, wherein the snow melting heater is provided on the back side of a roofing material. 3. The roof with solar cells according to claim 1, wherein a planar heater is provided as the snow melting heater, and a lower ground surface of the roof surface and the solar cells are provided. A gap is provided between the panel and a panel, a face door member for closing an opening on the eaves side of the gap is provided, and the snow melting heater is provided on the back side of the face door member. Roof with batteries. 4. The roof with solar cells according to claim 3, wherein the face door member is formed in a flat plate shape, and is disposed in an inclined state from an eaves edge of the solar cell panel to a surface of the roofing material. A roof with solar cells, characterized in that: 5. The roof with a solar cell according to claim 3, wherein the face door member has an upper joint joined to the solar cell panel, and a lower joint joined to a surface of the roofing material. A roof with solar cells, comprising: an upper joint portion and a lower joint portion that are connected to each other, and a stepped portion protruding from the lower joint portion. 6. The roof with solar cells according to claim 1, wherein the snow melting heater is an electric heater, and a lower ground surface on a roof surface on which the solar cell panels are provided, An insertion hole through which an electric wire for transmitting electric power generated by the solar cell panel is inserted is formed, and an electric wire for supplying electric power to the snow melting heater from inside is inserted into the insertion hole. Features a roof with solar cells. 7. The roof with a solar cell according to claim 1, wherein the snow melting heater is a planar heater formed in a planar shape, and is provided on an eaves end side end surface of the roof surface. Is provided with a nose cover member that hides the eaves side end face,
A roof with solar cells, wherein the snow melting heater is provided on the back side of the nose cover member. 8. The roof with a solar cell according to claim 1, wherein the snow melting heater is an electric heater, and the nose-shading member supplies power to the snow melting heater from indoors. A roof provided with a solar cell, wherein an insertion hole through which an electric wire for supplying air is inserted is formed. 9. The solar cell-equipped roof according to claim 1, wherein a heat insulating material for blocking heat is provided on a back side of the snow melting heater. Roof with batteries.