JPH1144035A - Roof structure equipped with solar cell - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a roof structure equipped with a solar cell capable of preventing the lowering of energy conversion ratio caused by a high temperature of the solar cell by making sufficient ventilation in a vent layer. SOLUTION: Roof structure equipped with a solar cell is equipped with a vent layer 6 provided between roof 3 and solar cell panels 5, 5,... and at least one opening 11 provided to the roof 3 on the lower sides of the solar cell panels 5, 5,... and connecting an attic space 10 to the vent layer 6. By the constitution, air flows into the vent layer 6 from the attic space 10 to make heat dissipation of the solar cell in the solar cell panels 5, 5,..., and the high temperature of the solar cell can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roof structure having a solar cell having a solar cell panel installed on an upper surface of a roof.

[0002]

2. Description of the Related Art Hitherto, in order to prevent global environmental problems, in particular, global warming, houses equipped with a photovoltaic power generation system that generates energy without emitting carbon dioxide, which is a main cause thereof, are generally known. ing. This photovoltaic power generation system consists of installing multiple solar panels on the top of a house roof, converting the DC power generated by the solar cells in the solar panels into AC by an inverter, and using it for daily life such as lighting and air conditioning. This is a system used as a resource. Houses equipped with a photovoltaic power generation system have attracted attention recently because of the ecological boom and systems that allow power companies to purchase surplus power, and are expected to become a large market in the future.

[0003] By the way, in the solar cell panel installed on the roof, when the solar cell itself is excessively heated, the energy conversion rate for converting solar energy into electric energy tends to decrease. Therefore, means for taking measures against heat radiation to prevent a decrease in the energy conversion rate is required. Conventionally, measures such as those disclosed in JP-A-6-212748 have been implemented.

In Japanese Patent Laid-Open No. 6-212748, solar cell panels are mounted side by side from the eaves side to the eaves side on the upper surface of the roof, and a ventilation layer is formed between the roof and the solar cell panels. An eaves draining plate is provided on the upper side and the lower side for communicating the ventilation layer with the outdoors, and a ventilation garbage is mounted between the draining plates. Therefore, the heat flow of the solar cell is dissipated by the airflow passing through the ventilation layer through the ventilation, and the temperature rise is suppressed.

[0005]

By the way, when a large number of solar cell panels are arranged on a roof, there is a demand to further increase the ventilation in the ventilation layer.

The present invention has been made in view of the above circumstances, and a solar cell capable of preventing a decrease in an energy conversion rate due to an increase in heat of the solar cell by sufficiently ventilating a ventilation layer. It is an object of the present invention to provide a roof structure having:

[0007]

In order to solve the above-mentioned problems, according to the present invention, for example, as shown in FIGS. 1 to 5, a plurality of solar cells are provided on an upper surface of a roof 3 (for example, a roof panel). In a roof structure 100 provided with solar cells provided with battery panels 5, 5,..., A ventilation layer 6 provided between the roof 3 and the solar cell panels 5, 5,. Are provided on the roof 3 below the solar cell panels 5, 5,..., And are provided with at least one opening 11 for communicating between the back of the hut 10 and the ventilation layer 6.

According to the first aspect of the present invention, the ventilation layer 6 communicating with the outside is provided between the roof 3 and the solar cell panels 5, 5,. Roof 3
Is provided with at least one opening 11 for communicating the back of the hut 10 with the ventilation layer 6.
Can be used, for example, as a vent in the hut back 10 and the ventilation layer 6. Therefore, the ventilation layer 6 from the hut back 10
, Heat is dissipated from the solar cells (not shown) of the solar cell panels 5, 5,..., And the heat of the solar cells can be prevented from becoming high heat. A high conversion rate can be maintained, and stable power supply can be achieved.

In addition, not only the ventilation layer 6 but also the hut 10 can be ventilated at the same time, so that it is not necessary to provide a dedicated ventilation port for the hut, or even if it is provided, a small number of vents are required. Become.

Furthermore, the opening 11 can be used as a lead-in port for various wirings 20, 20,... Of the solar cell, so that it is not necessary to newly form a hole for drawing in the wirings 20, 20,. Therefore, work efficiency can be improved.

Here, the number or size of the openings 11 is
There is no particular limitation, and it may be arbitrarily provided in consideration of the number of solar cell panels 5, 5,...

According to a second aspect of the present invention, in the roof structure including the solar cell according to the first aspect, the opening portion 11 is provided.
Is characterized by being a ventilation opening for ventilating the back of the hut 10 and the ventilation layer 6.

According to the second aspect of the present invention, the opening 11
Are ventilation holes for ventilating the hut back 10 and the ventilation layer 6, so that air flows into the ventilation layer 6 from the hut back 10 and the solar cells (not shown) of the solar cell panels 5, 5,. Heat dissipation of the solar cell (not shown) can be prevented from becoming high heat, so that the state of high energy conversion of the solar cell can be maintained and stable power supply can be achieved. Can be planned.

In addition, not only the ventilation layer 6 but also the hut back 10 can be ventilated at the same time, so that it is not necessary to provide a dedicated ventilation port for the hut back, or even if it is provided, only a small number of vents are required. Become.

According to a third aspect of the present invention, in the roof structure provided with the solar cell according to the first aspect, the opening portion 11 is provided.
Are various wirings 20, 2 of the solar cell panels 5, 5,.
0,...

According to the third aspect of the present invention, the opening 11
Are various wirings 20, 2 of the solar cell panels 5, 5,.
0,...
.. Can be drawn into the house, and it is not necessary to newly open a hole for drawing in the wirings 20, 20,.

According to a fourth aspect of the present invention, in the roof structure including the solar cell according to any one of the first to third aspects, the ventilation layer 6 and the outside are provided on the eaves back 13 of the eaves portion b of the roof. It is characterized by having an eaves ventilation vent 14 for communicating with the eaves.

According to the fourth aspect of the present invention, the eaves back ventilation port 14 for communicating the ventilation layer 6 with the outside is provided in the eaves back 13 of the roof 3 at the eaves tip b. Accordingly, claims 1-3
The same effect as the effect of the invention described in any one of the above is obtained, and air flows from the outside into the ventilation layer 6, thereby further dissipating the heat of the solar cell as compared with the invention of the first embodiment. Can be promoted.

According to a fifth aspect of the present invention, in the roof structure including the solar cell according to any one of the first to fourth aspects, the plurality of rails 4, 4,.
It is provided on the upper surface of the roof 3 from the ridge part a to the eaves part b, and the solar cell panels 5, 5,... Are bridged on two rails 4, 4. And

According to the fifth aspect of the present invention, the concave portion 41 extends longitudinally from the ridge portion a to the eaves portion b on the upper surface of the roof 3.
Are provided, and the solar cell panels 5, 5,... Are bridged between the two rails 4, 4. Therefore, the same effect as the invention according to any one of claims 1 to 4 can be obtained, and a gap is formed between the roof 3 and the solar cell panels 5, 5,. The ventilation layer 6 can be reliably formed by the gap.

Furthermore, since the rails 4, 4,... Are provided with a concave portion 41 in the longitudinal direction, the concave portion 41 can be used as a drain gutter or the like.

According to a sixth aspect of the present invention, in the roof structure including the solar cell according to any one of the first to fifth aspects, the roof 3 is constituted by a panel.

According to the sixth aspect of the present invention, since the roof 3 is constituted by panels, for example, when the roof panel 3 is prepared in advance in a factory or the like, the opening 11 and the eaves ventilation hole 14 are provided. As a result, workability at the site can be improved.

Here, as the roof panel 3, for example,
The vertical beam 3a and the horizontal beam 3b are assembled into a rectangular frame, and a reinforcing bar (not shown) is vertically and horizontally assembled inside the rectangular frame to form a frame, and plywood is provided on both sides of the frame. Although the thing etc. which the surface material 3c of the above etc. was stuck are used, it is not limited to this.

According to a seventh aspect of the present invention, in the roof structure having the solar cell according to the sixth aspect, the solar cell panels 5, 5 of the ridge portion a where the panels 3, 3 constituting the roof are brought together. ,... Are not provided, and a panel connecting member 33 (for example, a connecting purlin) provided in contact with only the side surface of the panel, and the panel provided with the solar cell panels 5, 5,. It is characterized by having a ridge vent 12 provided on the side surface to communicate the back of the hut 10 and the ventilation layer 6.

According to the seventh aspect of the present invention, the panel connecting member abuts only on the side of the ridge section a where the panels 3 constituting the roof are not provided with the solar cell panels 5, 5,... A ridge ventilation hole 12 is provided at the end of the ridge a where the solar cell panels 5, 5,... Are provided to allow the back of the hut 10 and the ventilation layer 6 to communicate with each other. Therefore, the air in the back of the hut 10 is
The air flows into the ventilation layer 6 from the ridge ventilation opening 12 provided on the side and is discharged to the outside, so that the ventilation of the ventilation layer 6 and the ventilation of the cabin 10 can be performed efficiently. Further, since the ridge ventilation port 12 is provided only at the end of the panel where the solar cell panels 5, 5,... Are provided, the flow of air becomes equal to the flow of air in the ventilation layer 6, and 6
The ventilation in the inside and the inside of the cabin 10 can be efficiently performed.

The invention according to claim 8 is characterized in that rising portions 50b, 50b,... Rising from the surface of the roof 3 are provided around the solar cell panels 5, 5,. The contact portions 50c, 50c,... Between the rising portions 50b, 50b,.

According to the invention described in claim 8, the opening 11
Are provided around the sides of the solar cell panels 5, 5,..., Which rise from the surface of the roof 3, and the abutment between the rising portions 50b, 50b,. Are waterproofed, so that even if rainwater enters the ventilation layer 6 on the back surface of the solar cell panels 5, 5, ..., the rising portions 50b, 50c,.
, And the contact portions 50c, 50c,... Can prevent rainwater from entering the back of the hut 6.

[0029]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a roof structure having a solar cell according to the present invention will be described below in detail with reference to FIGS. FIG. 1 is a longitudinal sectional view of a roof showing a roof structure provided with a solar cell according to the present invention, FIG. 2 is an enlarged view near an opening in FIG. 1, and FIG. It is a top view of the roof part before arrange | positioning. Further, FIG.
Fig. 5 is a perspective view schematically showing a roof portion when various wiring members are passed through the opening, and Fig. 5 is an exploded perspective view showing a process when arranging a solar cell panel on the roof panel. is there.

A roof part 100 shown in FIG. 1 includes a roof panel 3 provided on a wall panel 1 as a skeleton and projecting obliquely outward through a connecting girder 2, and a roof ridge part on the upper surface of the roof panel 3. Rail 4 laid from a to eaves b
(See FIG. 5), a solar panel 5 arranged side by side on the rail 4, the roof panel 3 and the solar panel 5
, A ventilation ridge part 7 provided in the ridge part a of the roof, and an eave material 8 protruding from the outer surface of the wall panel 1 and abutting on the eave part b of the roof. And a ceiling plate 9 provided so as to protrude from a wall surface on the indoor side of the wall panel 1;
It is roughly constituted by a hut back 10 formed by being surrounded by the roof panel 3 and the ceiling plate 9.

The roof panel 3 is constructed by assembling the vertical rails 3a and the horizontal rails 3b into a rectangular frame, and mounting a reinforcing bar (not shown) vertically and horizontally inside the rectangular frame. In this structure, a ground board 3c such as plywood is stuck, and a roofing 3d is stuck thereon (FIG. 2).
reference). A purlin 31 for reinforcement is provided on the lower surface of the roof panel 3 in the girder direction. In addition, eaves part b
In the part where the solar cell panel 5 is not laid,
A roof finish 34 is laid.

As shown in FIG. 2, the roof panel 3 is provided with a plurality of square openings 11 for communicating the back of the hut 10 and the ventilation layer 6. The opening 11 is provided with an opening metal part 50. This opening metal part 50
Has a shape of a rectangular prism having a hollow inside, and has a protruding portion 50a vertically protruding outwardly in the middle of four surfaces of the rectangular prism. When the opening metal fitting 50 is fitted into the opening 11, the protrusions 50a, 50
Are abutted on roofing 3d affixed to the base plate 3c of the roof panel 3. Therefore, when fitted into the opening 11, a rising portion 50 b is formed in the ventilation layer 6 so that the opening metal fitting 50 projects from the upper surface of the roof panel.

A waterproof tape 3e is attached to the contact portions 50c so as to close a gap between the projecting portions 50a, 50a,... And the roofing 3d. As shown in FIG. 3, a large number of the openings 11, 11,... Are provided, and each of the openings 11, 11,. Also, as shown in FIG. 4, the openings 11, 11,.
Various wiring members 20 connected to the solar cell panel 5,
20, ... can be passed through.

A ridge part 32 for reinforcement is provided in a ridge part a where the roof panels 3 shown in FIG. 1 are joined together in a palm, and among the roof panels 3 arranged in this ridge part a,
A connecting purlin 33 as a panel connecting member is provided so as to abut only on the side surface of the roof panel 3 where the solar cell panel 5 is not provided. Then, a part of the crosspiece 3b of the roof panel 3 on which the solar cell panel 5 of the ridge part a is provided is cut out to form a gap, thereby forming the ridge part ventilation port 12
Is formed.

The roof panel 3 outside the wall panel 1, that is, the roof panel 3 of the eaves part b, in which the solar cell panel 5 is provided at the upper part, is provided with The eaves layer 6 is provided with an eaves back ventilation port 14 capable of supplying air. In addition, the said opening part 11, the said ridge part ventilation port 12, and the said eaves back ventilation port 14 are roof panels 3 at a factory.
May be provided in advance at the time of manufacturing.

The rails 4, 4, 4 have concave portions 41, 41, 41 as shown in FIG.
And a plurality of them are provided on the roof panel 3 at regular intervals. The rails 4, 4, and 4 are attached to the roof panel 3 on which the waterproof sheet 35 and the like are attached by, for example, screws (see FIG. 5). The solar cell panel 5 is shown in FIG.
As shown in FIG. 2, a plurality of solar cells (not shown) are juxtaposed and laminated with tempered glass (not shown) to provide weather resistance, and usually have a module size (1 module × 1 module). Is the minimum unit. And
The solar cell panel 5 can be attached by fitting into the recesses 41, 41 of the two rails 4, 4, and the solar cell panels 5, 5,... I have.

When the solar cell panels 5, 5,... Are mounted in the recesses 41 of the rails 4, 4,.
The grooves 41 are attached by being spaced apart from 5,.
are formed, and the grooves 41a, 41a,.
... can also be used as a drain gutter.

The ventilation layer 6 is formed between the roof panel 3 and the solar cell panel 5 attached to the rail 4. An eaves vent 15 is provided on the eaves portion b side of the ventilation layer 6. Is provided. In this eaves ventilation hole 15,
For example, a ventilation gutter (not shown) is attached, so that rainwater, dust, and the like hardly enter the ventilation layer 6. The ventilation ridge role 7 is provided on the ridge side a of the ventilation layer 6, and the ventilation ridge role 7 is provided so that the air in the ventilation layer 6 can be released to the outside. , Ventilation holes 16 are provided on the left and right sides of the ridge. When providing the ventilation wing role 7, an antiseptic 17 is provided in the ridge part a of the roof panel 3, and the ventilation wing role 7 is fixed to the antiseptic 17 with nails or the like. A gutter mounting member 81 is attached to the tip of the eaves tip b.
The gutter 82 is attached to 1 in the girder direction.

Next, the function and effect of ventilation by the roof structure provided with the solar cell according to the present invention will be described. First,
As shown in FIG. 1, outside air flows into the ventilation layer 6 from the eaves vent hole 15 and the eaves ventilation hole 14, and air in the cabin back 10 flows from the opening 11 to the ventilation layer 6.
Flows into. Then, the air that has flowed into the ventilation layer 6 removes the heat of the solar cell panel 5 and is discharged from the left and right ventilation openings 16 of the ventilation building role 7. Therefore, a state where the energy conversion rate of the solar cell is high can be maintained, and stable power supply can be achieved.

Further, not only the ventilation layer 6 but also the hut back 10 can be ventilated at the same time. Therefore, it is not necessary to provide a ventilation port dedicated to the hut back ventilation, or even if it is provided, a small number of vents is sufficient. . Further, the opening 10 can be used as a lead-in port for various wiring members 20 of the solar cell.

A combined purlin 33 is provided in contact with only the side of the roof panel 3 where the solar panels 5, 5,... Since a ridge vent 12 is provided at the end of the panel where the solar cell panels 5, 5,... are provided to allow the hut back 10 and the ventilation layer 6 to communicate with each other, the air in the hut back 10 The air flows into the ventilation layer 6 from the ventilation opening 12 and is discharged to the outside.
The ventilation of 0 can be performed efficiently.

Further, since the ridge vent 12 is provided only at the end of the panel where the solar cell panels 5, 5,... Are provided, the air flow becomes equal to the air flow in the ventilation layer 6. For example, unlike the case where the ridge vent 12 is provided also on the side of the roof panel 3 where the solar cell panels 5, 5,. And the ventilation in the hut back 10 can be implemented efficiently. Are provided on the periphery of the opening 11 on the side of the solar cell panels 5, 5,..., Which rise from the roof 3 surface, and the rising portions 50b, 50b,. Contact part 50 with 3
Since c, 50c,... are waterproofed by waterproof tapes 3e, 3e,.
, And the contact portions 50c, 50c,... Even when rainwater enters the ventilation layer 6 on the back surface of the contact portions 50c, 50c,.
, It is possible to prevent rainwater from entering the back of the hut 10.

The ridge ventilation hole 12 may be formed, for example, by making a hole in the horizontal beam 3b of the roof panel 3.
Further, a hole may be formed in the face material 3c of the roof panel 3. The opening 11 has a square cross section in the above embodiment, but is not particularly limited thereto, and may have any cross section.

[0044]

According to the first aspect of the present invention, a ventilation layer communicating with the outside is provided between the roof and the solar cell panel,
Since at least one opening for communicating between the back of the hut and the ventilation layer is provided on the lower roof of the solar cell panel, this opening is used, for example, as a ventilation opening in the back of the hut and the ventilation layer. I can do it. Therefore, the air flows into the ventilation layer from the back of the hut, and the heat of the solar cells of the solar cell panel is dissipated, so that the solar cells can be prevented from becoming high heat, and the energy conversion rate of the solar cells can be reduced. Can be maintained and stable power supply can be achieved. In addition, not only the ventilation layer, but also the ventilation of the back of the hut can be performed at the same time. Therefore, it is not necessary to provide a ventilation port dedicated to the ventilation of the hut, or even if it is provided, a small number is required. Further, this opening can be used as a lead-in port for various wirings of the solar cell, and it is not necessary to newly form a hole for drawing in wirings, so that work efficiency can be improved.

According to the second aspect of the present invention, the opening is
Since it is a ventilation opening for ventilating the back of the hut and the ventilation layer, air flows into the ventilation layer from the back of the hut, and the heat dissipation of the solar cells of the solar cell panel is performed. As a result, the state where the energy conversion rate of the solar cell is high can be maintained, and stable power supply can be achieved. In addition, not only the ventilation layer, but also the ventilation of the hut can be performed at the same time. Therefore, it is not necessary to provide a ventilation port dedicated to the ventilation of the hut, or even if it is provided, a small number is required.

According to the third aspect of the present invention, the opening is
Since it is a lead-in port for various wirings of the solar cell panel, various wirings of the solar cell can be drawn into the house from this opening, and it is not necessary to newly open a hole for wiring lead-in. Work efficiency can be improved.

According to the fourth aspect of the present invention, the eaves behind the roof of the eaves portion is provided with an eaves ventilation vent for communicating the ventilation layer with the outside. The same effect as the effect of the invention described in the description can be obtained, and air flows from the outside into the ventilation layer, so that the heat dissipation of the solar cell can be further promoted as compared with the invention of claim 1. .

According to the fifth aspect of the present invention, a plurality of rails having recesses in the longitudinal direction from the ridge to the eaves are provided on the upper surface of the roof, and the solar cell panel is bridged between the two rails. Therefore, the same effect as the invention according to any one of claims 1 to 4 can be obtained, and a gap is formed between the roof and the solar cell panel by the rail, and the ventilation layer can be reliably formed by the gap. Can be. Furthermore, since the rail is provided with a concave portion in the longitudinal direction, the concave portion can be used as a drain gutter or the like.

According to the sixth aspect of the present invention, the panel connecting member is provided so as to abut only on the panel side where the solar cell panel is not provided in the ridge where the panels constituting the roof are abutted. At the end of the panel where the solar panels are provided, there is a ridge vent that connects the back of the hut and the ventilation layer, so that the air behind the hut can be ventilated on the ridge side of the back of the hut. Since the air flows into the ventilation layer from the mouth and is discharged to the outside, the ventilation in the hut can be efficiently performed simultaneously with the ventilation in the ventilation layer. Furthermore, since the ridge ventilation port is provided only at the end of the panel where the solar cell panel is provided, the air flow is equal to the air flow in the ventilation layer, and the ventilation in the ventilation layer and the inside of the hut Ventilation can be performed efficiently.

According to the seventh aspect of the present invention, since the roof is constituted by panels, for example, when the roof panel 3 is prepared in advance in a factory or the like, the opening 11 and the eaves ventilation hole 14 are provided. Accordingly, workability at the site can be improved.

According to the eighth aspect of the present invention, a rising portion rising from the roof surface is provided around the opening on the side of the solar cell panel, and a contact portion between the rising portion and the roof is provided. Is waterproof, so even if rainwater enters the ventilation layer on the back of the solar panel, it is possible to prevent rainwater from entering the back of the hut by waterproofing the rising part and the contact part Becomes

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a roof showing a roof structure including a solar cell according to the present invention.

FIG. 2 is an enlarged view near an opening in FIG. 1;

FIG. 3 is a plan view of a roof before a solar cell panel is provided.

FIG. 4 is a perspective view schematically showing a roof when various wiring members are passed through an opening.

FIG. 5 is an exploded perspective view showing a process when a solar cell panel is provided on a roof panel.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Wall panel 3 Roof panel 4 Rail 5 Solar panel 6 Ventilation layer 10 Back of a hut 11 Opening 12 Wing part ventilation opening 13 Eaves back 14 Eaves ventilation ventilation opening 15 House ventilation opening 16 Ventilation opening 33 Joining purlin (panel connecting member) 41 Concave part 50 Opening hardware 50b Rising part 50c Contact part a Building part b Eaves part

Claims (8)

[Claims] 1. A roof structure comprising a solar cell having a plurality of solar cell panels provided on an upper surface of a roof, wherein: a ventilation layer provided between the roof and the solar cell panel and communicating with the outside; A roof structure provided with a solar cell, comprising: at least one opening provided on the roof below a battery panel and communicating between the back of the hut and the ventilation layer. 2. The roof structure according to claim 1, wherein the opening is a ventilation port for ventilating the back of the hut and the ventilation layer. 3. The roof structure having a solar cell according to claim 1, wherein the opening serves as a lead-in port for various wirings of the solar cell panel. 4. The solar cell according to claim 1, further comprising an eaves ventilation hole for communicating the ventilation layer with the outside, on the eaves behind the eaves portion of the roof. Equipped roof structure. 5. A configuration in which a plurality of rails having a concave portion in the longitudinal direction are provided on the upper surface of the roof from the ridge to the eaves, and the solar cell panel is bridged to the two rails. A roof structure comprising the solar cell according to any one of claims 1 to 4. 6. The roof structure comprising a solar cell according to claim 1, wherein the roof is formed of a panel. 7. A panel connecting member provided in contact with only a side surface of the panel on which the solar cell panel is not provided, in a ridge portion where the panels constituting the roof are abutted; A roof provided with a solar cell according to claim 6, further comprising: a ridge vent provided at an end of the panel provided with a solar cell and communicating with the ventilation layer with the ventilation layer. Construction. 8. A rising portion rising from the roof surface is provided around the solar cell panel side of the opening, and a contact portion between the rising portion and the roof is subjected to waterproof treatment. A roof structure comprising the solar cell according to any one of claims 1 to 7.