JP2002013228A - Wall panel, building with DC power supply using the wall panel, and construction method thereof - Google Patents

Abstract

(57) [Problem] To provide a wall panel, a building with a DC power supply using the wall panel, and a construction method capable of simplifying wiring work and improving durability. A wall panel (105) has a DC input unit (106) and a DC output unit (102), and incorporates a wire (103) connecting the DC input unit (106) and the DC output unit (102), and a display for displaying the polarity of the wire (103). Means. As the DC power supply, for example, a solar cell 101 is used.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wall panel having a built-in electric wire for a DC power supply and a building using the wall panel having a built-in electric wire for a DC power supply. TECHNICAL FIELD The present invention relates to a wall panel having a built-in portion, a building with a DC power supply using the wall panel, and a method of constructing the building.

[0002]

2. Description of the Related Art In recent years, awareness of environmental problems has been increasing worldwide. Above all, concern about the global warming phenomenon associated with CO ₂ emission is serious, and the demand for clean energy is increasing more and more. At present, solar cells are most expected as a clean energy source because of their safety and ease of handling.

Conventionally, various types of solar cell modules have been proposed. For example, there are a type installed on an existing roof and a type installed on a wall. In addition, technical development on so-called building material-integrated solar cells, in which solar cells are incorporated into building materials themselves, is also being carried out.

[0004] By installing a solar cell module on the roof or wall of a building or by integrating it with a building material, power generated by the solar cell can be used in the building.

[0005] The electric power generated by the solar cell is drawn indoors from the roof or walls of the building using electric wires. An example of a building equipped with such a solar cell module is shown in FIG.
Shown in

FIG. 12 is a schematic cross-sectional view showing a state in which a solar cell output wire is drawn indoors in a building having a solar cell installed on a roof.

In FIG. 12, reference numeral 1201 denotes a roof material-integrated solar cell; 1202, an electric wire; 1203, a rafter;
Is a roof panel, 1205 is a ceiling panel, 1206 is a wall panel, 1207 is a heat insulating material, 1208 is a hanging tree, 1209
Denotes an adjusting material, and 1210 denotes an eave ceiling.

In such a conventional building, an electric wire 1202 connected to a solar cell 1201 is drawn into a room (attic space) through a hole formed in a roof panel 1204 as shown in FIG. , And penetrated the room through the heat insulating material 1207 on the ceiling panel and the ceiling panel 1205.

The electric wire drawn into the room is wired along a wall and connected to a connection box (not shown) or an inverter (not shown) to use the power of the solar cell.

FIG. 13 shows a building provided with a solar cell module as another example of a method of drawing electric wires.

FIG. 13 is a schematic cross-sectional view showing a state in which a solar cell output wire is drawn indoors in a building having a solar cell installed on a wall surface.

In FIG. 13, 1301 is a solar cell mounted on a wall, 1302 is an electric wire, 1303 is an exterior material, 1304
Denotes a heat insulating material, 1305 denotes an interior material, and 1306 denotes a hole for passing an electric wire.

In such a conventional building, electric wires 13
In No. 02, a hole 1306 for inserting an electric wire was formed in the exterior material 1303, the heat insulating material 1304, and the interior material 1305 of the wall panel, and the electric wire was inserted into the insertion hole and drawn indoors.

[0014]

In the prior art described above, when electric wiring is performed from a solar cell, a heat insulating material, a ceiling panel, a wall panel, and the like are used to draw a power extraction wire of the solar cell indoors. The troublesome work of making a hole was necessary.

In addition, if the electric wires are barely wired on the wall surface, the appearance of the room is impaired, so that it is necessary to cover the electric wires with a cover (not shown).

Further, since the drilling work on the ceiling panel, wall panel, and the like is performed at the site, it may not be possible to perform sufficient sealing, and rainwater may enter through the hole for inserting the electric wire to cut the wall. There was a problem that durability was reduced.

With respect to the above-mentioned problem, there is known a method of inserting an electric wire into a wall panel in order to improve the aesthetic appearance of a room due to wiring. For example, Japanese Patent Application Laid-Open No. Hei 8-21030 discloses an inner wall panel in which a wiring guide member is provided in a wall panel having a heat insulating material, and into which an AC electric wire can be inserted. According to the description of this publication, the use of this inner wall panel facilitates insertion of an AC electric wire into the wall panel.

However, in the wall panel disclosed in this publication, there is no description about a DC input section from the roof side or the wall side or a section for taking out an electric wire to the room. Further, there is no description about connection of electric wires when the solar cell is installed on a wall or a roof. That is, no means has been considered at all for a means for obtaining an optimum structure for a building having a solar cell.

The present invention has been proposed in view of the circumstances described above, and is a wall panel capable of simplifying wiring work and improving the durability of a wall, and a building with a DC power supply using the wall panel. And to provide a construction method thereof.

[0020]

The inventor of the present invention has conducted intensive research and development to achieve the above-mentioned object, and has found that the following wall panel is the best.

That is, the wall panel of the present invention comprises a DC input section and a DC output section, an electric wire for connecting the DC input section and the DC output section, and a polarity display for indicating the polarity of the electric wire. It is characterized by having means.

Further, the wall panel of the present invention comprises: a plurality of DC input sections and a DC output section; a plurality of electric wires for connecting each of the DC input sections to each of the DC output sections; And a wiring display means for displaying a wiring relationship between the unit and each of the DC output units.

In this case, it is preferable that the DC input section comprises a connector.

The connector preferably has waterproofness, and more preferably does not allow insertion of a different pole.

Further, it is preferable that the positive electrode side and the negative electrode side of the electric wire are separated from each other, and it is more preferable that the electric wire is coated with an insulating noncombustible material or a flame retardant material.

Further, it is preferable that the DC input section and the DC output section have a ground display.

Preferably, a waterproof bushing is attached to the DC input section.

[0028] Further, an AC input section and an AC output section, and an electric wire connecting the AC input section and the AC output section are provided, and each of the DC input section, the DC output section, the AC input section and the AC output section is provided. The unit may be provided with DC / AC display means for displaying DC / AC distinction.

In this case, it is preferable that the DC input section and the DC output section and the AC input section and the AC output section are provided independently of each other.

[0030] The building with a DC power supply according to the present invention is characterized in that it comprises the wall panel and a DC power supply, and the electric wire of the wall panel is connected to the DC power supply.

In this case, the DC power supply can be constituted by a solar cell.

Preferably, the DC input section on the roof side of the wall panel is provided above the ceiling surface.

It is preferable that the electric wire is drawn into the wall panel so as to have a portion facing upward.

The DC output section of the wall panel can be located either indoors or outdoors, or both indoors and outdoors.

Further, the DC output section of the wall panel can be constituted by an outlet or a terminal block embedded in the wall panel.

The construction method of a building with a DC power supply of the present invention is as follows.
The invention is characterized in that the DC power supply and the electric wires are electrically connected by using a wall panel in which electric wires are built in advance.

[0037]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view showing a wall panel according to the present invention;

FIG. 1 is a schematic sectional view of a building with solar cells provided with a wall panel and a DC power supply according to an embodiment of the present invention.

In FIG. 1, reference numeral 101 denotes a solar cell;
Denotes a DC output unit (outlet), 103 denotes an electric wire, 104 denotes a roof panel, 105 denotes a wall panel, and 106 denotes a DC input unit.

A building with a solar cell provided with a wall panel and a DC power supply according to the embodiment of the present invention, as shown in FIG.
A wall panel 1 having a DC output unit 102 and a DC input unit 106 in which an electric wire 103 is embedded in a wall in advance.
05 is used. For this reason, the wiring work of the electric wire 103 from the solar cell becomes extremely easy.

FIG. 2 is a schematic sectional view showing a DC input portion of the wall panel according to the embodiment of the present invention.

In FIG. 2, 201 is a roof material-integrated solar cell, 202 is an electric wire, 203 is an electric wire in a wall panel built-in portion,
204 is an electric wire connection part (connector), 205 is a heat insulating material, 2
06 indicates a wall panel, 207 indicates a roof panel, and 208 indicates a DC input unit.

The wall panel 203 shown in FIG.
03 is embedded, and the DC input unit 208 is provided above the ceiling surface. For this reason, connection work of the electric wire in the attic space becomes easy. Further, even if a roof fire occurs, it is possible to prevent smoke filled in the attic from flowing into the room through the through-hole of the electric wire. Further, by providing the electric wire connection portion (connector) 204 on the DC input portion 208 side, a roofer can perform electric wire connection at the time of roof construction, thereby improving work efficiency.

FIG. 3 is a schematic sectional view showing a DC output section of the wall panel according to the embodiment of the present invention.

In FIG. 3, reference numeral 301 denotes an electric wire in a wall panel built-in portion, 302 denotes a DC output portion, 303 denotes a wall panel, and 304 denotes a wall panel.
Is a floor panel, 305 is a ceiling panel on the first floor, 306 is a heat insulating material, 307 is a hanging tree, 308 is a junction box, and 309 is a DC-
Each shows a DC converter.

The wall panel 303 shown in FIG.
01 is embedded, and the DC output unit 302 is taken out to the indoor side. Therefore, on the indoor side, the electric wire 301 can be connected to devices such as the connection box 308.

In the case where the electric wire for extracting power is directly connected to the electric load, the electric wire may be connected via the DC-DC converter 309. This DC-DC converter 30
Reference numeral 9 is for adjusting a voltage and a current value according to the capacity of an electric load used indoors. However, since the adjustment range of the DC-DC converter 309 is predetermined, the number of series-parallel solar cell strings is
It is necessary to adjust in advance so as to be within the adjustment range.

As shown in FIG. 3, it is preferable to provide a connection box 308 on the input side of the DC-DC converter 309. By providing such a connection box 308,
Check the operation of each solar cell string during construction,
Electrical disconnection (operation of a switch) between the electric load side and the solar cell side can be performed. In addition, by incorporating a backflow diode in the connection box 308, backflow from the electric load to the solar cell can be prevented. DC-D
It is also possible to incorporate the function of the connection box 306 in the C converter 309.

FIG. 9 is a schematic cross-sectional view of a building with a solar cell using a wall panel containing a DC electric wire and an AC electric wire according to an embodiment of the present invention and establishing system cooperation.

In FIG. 9, reference numeral 901 denotes a solar cell;
Is a connection box, 903 is a cross-current converter (inverter), 90
4 is a DC electric wire, 905 is a roof panel, 906 is a wall panel, 907 is a system power circuit, 908 is an integrated power meter, 90
Reference numeral 9 denotes a switchboard, and 910 denotes an AC electric wire.

A wall panel 906 shown in FIG. 9 includes a DC input section and a DC output section, an AC input section and an AC output section, and incorporates a wire connecting the respective input / output sections.
If the wiring relation of each input / output unit is displayed, electrical connection for system cooperation can be easily performed. In addition, as shown in FIG. 9, system cooperation can be performed using a junction box 902, a cross-current converter (inverter) 903, and a switchboard 909.

A brief description of this system cooperation is as follows.
The electric power generated by the solar cell 901 is collected in a junction box 902, and subjected to cross-current conversion by an inverter 903, and
09 to an electrical load in the home. Here, when the generated power is larger than the power consumption and there is surplus power, the power can be sold to the power company by transmitting the power to the system power circuit 907. Conversely, when the amount of power generation is small or the amount of power consumed by the electric load in the home is large, the shortage can be supplemented by the system power circuit 907 and purchased from the power company.

The electrical connection on the roof side is made by a connector (not shown).
Is done by a roofer. On the other hand, connection box 9
02, the cross-connection of the cross-current converter 903, the switchboard 909, and the AC line on the system side is performed by an electrician.

When constructing a solar cell system,
From the viewpoint of inspection or maintenance, it is necessary to collect all electric wires for extracting power in the connection box 902. When installing the electric wires, the connection box 902 and the inverter 9
03 and the like can be incorporated in the wall panel 906 in advance, and by doing so, the wiring workability is improved and the aesthetic appearance in the room can be further improved. in this case,
In consideration of connection work and maintainability, the connection box 9
02 and the inverter 903, etc.
It is preferable to provide so as to open toward the indoor side of the vehicle.
Further, it is preferable that each device main body be configured to be taken out of the wall panel 906 to the indoor side.

Hereinafter, each member constituting a building with a DC power supply using the wall panel of the present invention will be described.

<Solar Cell> The solar cell is not particularly limited as long as it can be attached to a building. As a concrete form, there are an existing installation type on a roof, a roof material integrated type, a wall material integrated type, a wall installation type, and the like.

In a building with a DC power supply using the wall panel of the present invention, when the power generated by the solar cell is used as a DC, the power is connected to a DC electric load directly or through a DC-DC converter. Therefore, the arrangement of the solar cells on the roof surface or the wall surface needs to be designed in a string in consideration of the number of series-parallel so as to be close to the capacity of the DC electric load. In the case of using AC, it can be used via a cross-current converter (inverter). However, in some cases, the system can be linked to a system power circuit by performing a cross-current conversion and connecting to a system power circuit.

<Electric Wire> The electric wire is used as a path for connecting the electricity generated by the solar cell in series or in parallel, or for connecting to a junction box or an inverter. In a building with a DC power supply using the wall panel of the present invention, a part of the electric wire is used by being built in a wall in advance. Further, although it is preferable to use an electric wire having a cable structure, it is also possible to use an insulated electric wire. The required performance includes heat resistance, cold resistance, mechanical strength, electrical insulation, water resistance, oil resistance, abrasion resistance, acid resistance, alkali resistance, and the like.

The electric wire preferably has an upwardly directed portion before being drawn into the wall, preferably immediately before the DC input portion. By adopting such a structure,
In the event that a rain leak occurs, it is possible to prevent a leakage accident due to water transmitted through the output wire of the solar cell.

The electric wires are preferably separated from each other between the positive electrode and the negative electrode. In general, when an electric wire is used for AC, even if an unexpected situation such as a fire or a short circuit occurs and the conductors of the electric wire are short-circuited, an overcurrent breaker is connected. The supply is cut off. On the other hand, in the case of DC wiring in a solar cell system, such breakers are not usually connected, so if wires (positive electrode and negative electrode) are separated and placed on a wall, unexpected High security can be maintained even in the event of a situation.

Further, it is preferable that each electric wire is coated with an insulating noncombustible material or a flame retardant material. As the insulating noncombustible material or the flame retardant material, for example, asbestos, glass fiber, or the like can be used. With such a structure, safety in the event of an unexpected situation such as a fire or a short circuit can be further enhanced.

When both cross-current electric wires are built in the wall panel, it is preferable that both electric wires, particularly the output portion, are arranged apart from each other. This is because if an unexpected situation such as a fire occurs and the insulation is melted and the conductor is exposed, if the AC and DC sides connected to the system power supply are close to each other, a secondary disaster will occur. Is expected to occur. Further, it is preferable that each electric wire is covered with an insulating noncombustible material or a flame retardant material.

As specific electric wires, JIS C360
5 standard 600V polyethylene cables (EV, EE,
CV, CE), JIS C3621 standard 600 VEP
Rubber insulated cable (PN, PV), JIS C3342
Standard 600V vinyl insulated vinyl sheath (flat) cables (VVR, VVF) and the like can be used.

<Earth Wire> As the above-mentioned electric wire, it is preferable to use a cable having a cable structure, but it is also possible to use an insulated electric wire. Also, the ground wire is wired in advance in the wall panel like the electric wire,
Used as an electrical path for grounding the outer conductor of the DC power supply. Grounding is performed by connecting to a ground terminal of an electric device such as a connection box or an inverter.

<Display Means> In the wall panel according to the present invention,
In order to prevent incorrect connection, etc.
Alternatively, the type of the string is displayed. That is,
When a plurality of electric wires are incorporated, it is necessary to display such that the input / output unit can determine that the electric wires are of the same type. This makes it possible to prevent incorrect connection even when the solar cell has a plurality of strings. If the wall panel incorporates both DC and AC electric wires, it is necessary to display both of them.

In order to perform the discrimination display, for example, a display is made on the input / output portion of the wall panel or the end of the electric wire, an electric wire of a different color is used for each type, or an electric wire having a different line for each type is used. do it. Further, when a connector is used for the DC input section, the display can be performed on the connector section.

<Electrical Wire Connection Portion> The electric wire connection portion is not particularly limited as long as it has a structure capable of connecting electric wires. To make the connections,
A crimp connection may be performed using a connector or using a butt or overlap sleeve. On the DC input side when a solar cell is installed on a roof or a wall, a roofer who installs the solar cell may not be qualified for electrical work. Therefore, a method of performing connection using a connector is preferable. Further, the reliability can be further improved by using a waterproof connector. When there are a plurality of strings, it is possible to use a type that can connect all the electric wires with one connector.

As described above, by displaying the polarity of the electric wire at the connection portion, it is possible to prevent a connection error. Further, by using a connector that cannot be inserted with a different polarity, connection errors can be almost completely prevented.

<Wall Panel> The wall panel is not limited to a wall panel that has been made in a factory in advance for a prefabricated construction method.
A type that can be assembled at the construction site may be used.

FIG. 4 shows a wall panel of the present invention in which electric wires are embedded in advance. FIG. 4 (a) is an exploded perspective view of the wall panel for explaining a method of manufacturing the same, and FIG. FIG. 4 is an exploded perspective view of a completed wall panel.

In FIG. 4, reference numeral 401 denotes a frame material; 402, a plywood; 403, an electric wire; 404, a hole formed in the plywood;
Reference numeral 5 denotes a DC output unit (outlet).

To manufacture a wall panel, first, a dried frame material 401 is assembled, and a plywood 402 on one side is attached and fixed. After the panel is turned over, the inside is filled with a heat insulating material (not shown), and finally the plywood 402 is closed and fixed. In order to fix the panels integrally, the panels may be adhered with an adhesive, or a screw nail or the like may be driven.

The wall panel of the present invention has a wire 403 built therein in advance. In order to incorporate the electric wire 403 inside the wall panel, in the above-described process, the electric wire 403 is arranged when the frame material 401 is sandwiched by the plywood 402, and the plywood 402 and the frame material 401 are appropriately cut out or holed. Is provided. Then, an electric wire is drawn out from the notch or the hole to produce a wall panel. When the DC output unit is an outlet (405), the DC output unit (outlet) 405 is attached to a plywood in advance, and the electric wire 403 is connected to the outlet.

The interior and exterior materials may be pasted on the wall panel in advance, or may be pasted on the plywood after the wall panel is assembled on the building. In addition, it is preferable to attach a waterproof bushing to the wire outlet hole on the DC input side. By installing the waterproof bushing in this way, in the event that a rain leak occurs, it is possible to prevent an electrical leakage accident due to water passing through the output wire of the solar cell.

Whether the electric wire is to be taken out indoors or outdoors on the wire drawing-in side and the wire taking-out side is determined by
It can be changed as appropriate according to the design, and the positions of the holes in the plywood and the frame material are changed according to the design. When a plurality of electric wires are incorporated, the same operation as described above is performed at a plurality of locations.

In addition to the electric wire for the solar cell (for direct current), the electric wire for alternating current can be embedded in the wall and used in the same manner. In this case, the DC / AC discrimination display needs to be provided on the wall panel.

Further, a ground wire can be built in the wall panel. In general, when the enclosure of a DC power supply is made of metal, it is prescribed by the technical standards for electrical equipment that the enclosure be grounded. For example, when a solar cell module with a metal enclosure is installed on a roof, by incorporating a ground wire in the wall panel, the electric wire connected to the metal enclosure on the roof side By connecting to the other end and directly connecting to the earthing rod, or connecting to the earthing terminal in the connection box or the inverter, the metal enclosure of the DC power supply can be easily earthed.

When the wall panels are assembled separately for each floor, it is necessary to match the positions of the electric wires and the connection shapes of the ends of the electric wires in advance so that the connecting portions of the wall panels can be easily connected.

<DC Input Portion, DC Output Portion> The DC input portion is a portion where the electric wire is drawn into the wall panel on the side connected to the solar cell, and the DC output portion is an inverter, a connection box or the like. On the side connected to the electrical load,
It is the part that takes out the electric wire from the wall panel. As the DC output unit, an outlet or a terminal block can be used.

As described above, the DC input portion and the DC output portion are formed by appropriately providing holes in the plywood and the frame and taking out the electric wires in the step of manufacturing the wall panel. The shape of the end portion of the electric wire is not particularly limited, but a connector is preferable because a roofer who is not qualified to perform electric work may perform a solar cell mounting operation on the DC input unit side. Further, a type in which the connection portion is embedded in the wall panel can be used. Further, a type in which electric wires for a plurality of strings are connected by one connector can be used.

On the other hand, the connection to the DC / DC converter, junction box, inverter and the like on the DC output side is performed by an electrician. In addition, an outlet, a terminal block, or the like can be used as the DC output unit. With such a structure, the electrician can easily perform the work. In this case, it is necessary to electrically connect the electric wire and the outlet or the electric wire and the terminal block in the panel.

Further, it is preferable to use a bushing or the like around the hole for the DC input portion, the DC output portion, or the fixing portion of the outlet of the wall panel.

FIG. 14 shows a wall panel to which a bushing is attached. FIG. 14 (a) is a schematic sectional view showing a state where an electric wire is passed through the bushing, and FIG. 14 (b) is a terminal through the bushing. It is an outline sectional view showing the state where a stand was fixed.

In FIG. 14, reference numeral 1401 denotes an electric wire;
2 denotes a bushing and 1403 denotes a terminal block. As shown in FIG. 14, after drilling a hole in the wall panel, a bushing is attached to the hole, and then an electric wire is passed through or a terminal block is fitted and fixed. By using the bushing in this way, not only can the airtightness between the inside of the panel and the room or between the room and the outside be improved, but also the beauty of the room can be improved.

Also, by using a bushing,
It is possible to prevent a decrease in the durability of the wall panel. Furthermore, it is preferable to use a waterproof bushing in the DC input section in order to enhance the waterproofness in the event of a rain leak.

It is preferable that the DC input section is above the ceiling panel. This structure not only improves the aesthetics of the room, but also prevents the smoke filled in the attic from flowing into the room through the through holes in the wires even in the event of a fire. can do.

When the wall panel has both DC and AC input / output sections, it is preferable that each is provided independently. This is because, in the event of a fire, even if the conductors of both the DC and AC electric wires are exposed, the secondary disaster can be prevented by providing them independently. It is.

[0088]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The wall panel of the present invention, a building with a DC power supply using the wall panel and a construction method thereof will be described in detail below based on specific embodiments.

<Embodiment 1> FIG. 1 is a schematic sectional view of a building with solar cells provided with a wall panel and a DC power supply according to Embodiment 1 of the present invention.

In FIG. 1, reference numeral 101 denotes a solar cell;
Denotes a DC output unit (outlet), 103 denotes an electric wire, 104 denotes a roof panel, 105 denotes a wall panel, and 106 denotes a DC input unit.

In the first embodiment, three strings of power generated by the solar cells on the roof are taken out as DC power in the room on the second floor.

FIG. 15 is a block diagram showing a schematic configuration of electric wiring in a building with a solar cell according to Embodiment 1 of the present invention.

In FIG. 15, reference numeral 1501 denotes a solar cell string, 1502 denotes a connection box, and 1503 denotes a DC-DC converter.

In the building with solar cells according to the first embodiment, as shown in FIG.
Are connected to a DC-DC converter 1503 via a connection box 1502. In a building with a solar cell having such a configuration, the indoor electrical load is D
It can be used by connecting to the C-DC converter 1501.

The wall panel used in the first embodiment has a DC input section 106 on the roof-side upper surface of the wall panel,
A DC output unit 102 was provided so that the electric wires could be taken out of the room on the floor, and each input / output unit was provided at six locations so as to incorporate three strings of electric wires.

Although only three strings are shown in FIGS. 1 to 3, each string is a pair of a positive electrode and a negative electrode.

The DC input unit 10 provided on the upper surface of the wall panel
A connector 6 is provided with a connector, and a waterproof bushing (not shown) is attached to a hole for attaching the connector. The DC output unit 102 was manufactured by extracting an electric wire from the panel surface. In addition, the end of the electric wire on the side of the DC input unit 106 is made of a connector of a positive and negative polarity which cannot be inserted into different polarities, so that a connection error does not occur.

Further, in order to prevent a secondary disaster at the time of a fire, the paired positive and negative electric wires were arranged at a distance of about 10 cm. In addition, the polarity of the wires and the indication of each string are specified so that each wire can be identified on each input / output unit of the wall panel.

Next, a drawing section of the electric wire 103 from the roof panel 104 to the wall panel 105 in FIG. 1, that is, a DC input section 106 will be described with reference to FIG.

In FIG. 2, 201 is a roof material-integrated solar cell, 202 is an electric wire, 203 is an electric wire (wall panel built-in part), 204 is a connector, 205 is a heat insulating material, 206 is a wall panel, 207 is a roof panel, and 208 Indicates a DC input unit.

As shown in FIG. 2, the electric wire 202 connected to the solar cell 201 is led into the attic space through the hole in the roof panel 207, and then embedded in the wall panel 206 via the connector 204. Connected to the electric wire 203 (wall panel built-in portion). Further, after the electric wire 202 passed through the hole of the roof panel 207, the electric wire 202 was wired so as to have a portion facing upward before reaching the DC input unit 208. In addition, after passing the electric power extraction wire through the hole of the roof panel 207, a heat-resistant sealing material (not shown) was attached on the roof material side to close the hole. With this structure, it is possible to prevent the flame from easily reaching the attic in the event of a rain and a fire. In addition, the electric wire 2 on the roof material integrated solar cell 201 side
02 and the electric wire 20 embedded in the wall panel 206
3 was connected using a connector 204. in this way,
Since the electric wire 203 is embedded in the wall panel 206 in advance and the connector 204 is provided, the wiring work can be easily performed.

Next, the arrangement of the electric wire 103 of the DC output unit 102 from the wall panel 105 to the room in FIG.
This will be described with reference to FIG.

In FIG. 3, reference numeral 301 denotes an electric wire in a built-in wall panel, 302 denotes a DC output unit, 303 denotes a wall panel, and 304 denotes a wall panel.
Is a floor panel, 305 is a ceiling panel on the first floor, 306 is a heat insulating material, 307 is a hanging tree, 308 is a junction box, and 309 is a DC-
Each shows a DC converter.

As shown in FIG. 3, the electric wire (wall panel built-in portion) 301 passing through the inside of the wall panel 303 is
03, and through the DC output unit 302 provided in
08 and connected to the DC-DC converter 309. In a building with a solar cell having such a configuration, the indoor electrical load is a DC-DC converter 3
09 and can be used.

Thus, the power generated by the solar cell is
By extracting it as DC power indoors, it can be used for charging portable batteries, lighting equipment, and the like.

As described above, by installing a plurality of electric wires 301 in the wall panel 303 in advance and displaying the polarity, wiring work for a solar cell having a plurality of strings becomes easy, and the aesthetic appearance and appearance of the room are improved. Both could be improved. In addition, since the DC output section 302 has a connector, the connection work can be easily performed. In addition, since the DC output unit 302 is located above the ceiling surface, it is possible to easily perform the connection work and improve the aesthetic appearance of the room. Furthermore, it is possible to prevent smoke from flowing into the room through the through hole of the electric wire 301 in the event of a fire.

Further, since the connector of the electric wire 301 was of a type which was of a positive and negative polarity and could not be inserted in different polarities, it could be correctly connected without making a wrong connection. Further, since the positive and negative electric wires are separated from each other, even in the event of a fire, it is possible to prevent an accident in which the positive and negative electrodes are short-circuited. Also, the electric wire 301
Is drawn into the wall panel 303 so as to face upward, and by providing a waterproof bushing in a hole of a DC input section (not shown) provided on the upper surface of the wall panel 303, a rain leak may occur. Even in this case, it is difficult for water to enter the wall panel 303, and electrical safety can be improved.

<Embodiment 2> In a building with a solar cell provided with a wall panel and a DC power supply according to Embodiment 2, the position where the electric wire is drawn into the room from the roof is on the outdoor side of the wall panel, and the wall panel is used. Is provided on the outdoor side, and a ground wire is pre-wired in the wall panel. The solar cell was a single string, and the ground wire was pulled in from the eaves side. Other configurations are the same as in the first embodiment.

FIG. 5 is a schematic sectional view of a building with a solar cell provided with a wall panel and a DC power supply according to Embodiment 2 of the present invention.

In FIG. 5, reference numeral 501 denotes a roof material-integrated solar cell, 502 denotes an electric wire, 503 denotes an electric wire (wall panel built-in portion), 504 denotes a connector, 505 denotes a heat insulating material, 506 denotes a wall panel, 507 denotes a roof panel, and 508 denotes a roof panel. Is the DC input section, 5
Reference numeral 09 denotes a ground wire, and reference numeral 510 denotes a ground wire connector.

The wall panel 506 used in the second embodiment is
As shown in FIG. 5, a DC input unit 508 is provided on the outdoor side of the wall panel 506 and above the ceiling surface, and a DC output unit ( (Not shown). Also, the wall panel 50
Reference numeral 6 has a built-in ground wire 509, and has a recessed portion of the ground wire 509 on the outdoor side of the wall panel 506 and above the ceiling surface, and the ground wire 509 is taken out into the room on the second floor. did.

The electric wire 50 built in the wall panel 506
Reference numeral 3 is coated with a cloth-like glass fiber. Also,
Waterproof bushings (not shown) are used in the holes of the input part and the output part of the electric wire 502 and the ground wire 509, and the end of the electric wire 502 of the DC input part 508 has a connector 504 and the end of the ground wire 509. The section has a connector 510. Further, an outlet (not shown) is attached to the wall panel 506 in the DC output section (not shown). Also, on the input / output unit of each wall panel 506,
The polarities of the electric wires 502 and 503 and the indication of the ground wire 509 are specified.

The ground wire 509 is electrically connected to the metal enclosure of the roof-integrated solar cell 501 on the roof, and is connected to the ground wire 5 built in the wall panel 506.
09 was connected by a connector 510. Earth wire 509
Was electrically connected to a ground terminal in a connection box (not shown) in the room.

As described above, when the wire 502 drawn from the roof into the room is located outside the wall panel 506, the DC input unit 508 is connected to the wall panel 50 in advance.
6, the electric wires 502, 50
3 can be easily connected. Also, the wall panel 50
Since the electric wire 503 built in 6 is covered with glass fiber which is a noncombustible material, even if a fire or the like occurs, occurrence of a secondary disaster can be prevented. In addition, by incorporating the ground wire 509 in the wall panel 506 in advance, the workability in connecting the ground wire 509 is improved, and the metal enclosure of the solar cell module can be easily grounded. it can.

<Embodiment 3> In a building with a solar cell provided with a wall panel and a DC power supply according to Embodiment 3, the position where the electric wire is drawn from the roof to the indoor is on the indoor side of the wall panel, and the wall panel is installed. Is provided on the indoor side, and the solar cell is one string. Other configurations are the same as in the first embodiment.

FIG. 6 is a schematic sectional view of a building with a solar cell provided with a wall panel and a DC power supply according to Embodiment 3 of the present invention.

In FIG. 6, 601 is a roof material-integrated solar cell, 602 is an electric wire, 603 is an electric wire (built-in wall panel), 604 is a connector, 605 is a heat insulator, 606 is a wall panel, 607 is a roof panel, and 608 is a roof panel. Indicates a DC input unit.

The wall panel 606 used in the third embodiment is
A DC input unit 608 is provided on the indoor side of the wall panel 606 and above the ceiling surface, and a DC output unit (not shown) is provided so that electric wires can be taken out of the room on the second floor. An outlet was attached to the wall panel 606 using a waterproof bushing (not shown) in the hole of the DC output unit. Further, a connector 604 is provided at the end of the electric wire 602 on the DC input section 608 side.

As described above, when the wire 602 drawn into the room from the roof is located on the indoor side of the wall panel 606, the DC input section 608 of the wall panel 606 is provided in advance on the indoor side of the wall panel 606. By doing so, workability in wiring can be improved.

<Embodiment 4> A solar cell-equipped building having a wall panel and a DC power supply according to Embodiment 4 of the present invention has a DC output unit provided on the first floor outdoors. The solar cell is one string, and the DC input section is provided on the eaves side. Other configurations are the same as in the first embodiment.

FIG. 7 is a schematic sectional view of a building with a solar cell provided with a wall panel and a DC power supply according to Embodiment 4 of the present invention.

In FIG. 7, reference numeral 701 denotes a solar cell;
Is a DC-DC converter, 703 is an electric wire (wall panel built-in part), 704 is a roof panel, 705 is a wall panel, 706
Denotes a DC input unit, and 707 denotes a DC output unit.

In the fourth embodiment, the solar cell 70 mounted on the roof
The power generated in step 1 is taken out as DC power outside on the first floor.

The wall panel 705 used in the fourth embodiment is
As shown in FIG. 7, a DC input unit 706 is provided on the outdoor side of the wall panel 705 and above the ceiling surface, and a DC output unit 7 is provided so that electric wires can be taken out on the first floor outdoors.
07 is provided. In addition, when the DC output unit 7 is
07 is connected to a DC-DC converter 702.

As described above, when the wall panel 705 is manufactured, by providing the DC output section 707 on the outdoor side, a DC power supply can be used outdoors.

In addition, by extracting the electric power generated by the solar cell as DC power outdoors, it can be used for, for example, charging a battery of an electric vehicle, a front light, a security light, and the like.

<Embodiment 5> A building with a solar cell provided with a wall panel and a DC power supply according to Embodiment 5 has one DC output unit.
It is provided both inside and outside the floor. The solar cell was one string, and the DC input part was provided on the eaves side.
Other configurations are the same as in the first embodiment.

FIG. 8 is a schematic sectional view of a building with a solar cell provided with a wall panel and a DC power supply according to the fifth embodiment.

In FIG. 8, reference numeral 801 denotes a solar cell;
Is a DC-DC converter, 803 is an electric wire, 804 is a roof panel, 805 is a wall panel, 806 is a DC input unit, 80
Reference numeral 7 denotes a DC output unit.

In the fifth embodiment, the solar cell 80 provided on the roof
The power generated in step 1 is taken out as DC power indoors and outdoors on the first floor.

The wall panel 805 used in the fifth embodiment is
A DC input unit 806 is provided so as to be on the outdoor side of the wall panel 805 and above the ceiling surface, and a DC output unit 807 is provided so that the electric wire 803 can be taken indoors and out of the first floor. Further, the DC output unit 8 is used indoors and outdoors.
07 is connected to a DC-DC converter 802.

As described above, when the wall panel 805 is manufactured, by providing the DC output unit 807 both indoors and outdoors, a power extraction unit indoors and outdoors can be easily manufactured. Further, by extracting DC power indoors and outdoors, DC power can be used in each place when power is required.

<Embodiment 6> A DC electric wire according to Embodiment 6
Buildings with photovoltaic cells that use grid panels with built-in AC power lines to establish grid coordination have a wall panel with AC power wires embedded in advance from the grid power circuit as well as taking out DC power from the solar cells. Is used. The solar cell was one string, and the DC input part was provided on the eaves side (outdoor side).

Further, an input portion for the AC power was provided on the outdoor side, and both output portions were provided so that both the cross-current could be taken out into the room on the second floor. For each input / output unit, DC / AC was specified on the wall panel, and for DC, positive / negative was specified. Other configurations are the same as in the first embodiment.

FIG. 9 is a schematic cross-sectional view of a building with a solar cell using a wall panel incorporating a DC electric wire and an AC electric wire according to the sixth embodiment and establishing system cooperation.

In FIG. 9, reference numeral 901 denotes a solar cell;
Is a connection box, 903 is a cross-current converter (inverter), 90
4 is a DC electric wire, 905 is a roof panel, 906 is a wall panel, 907 is a system power circuit, 908 is an integrated power meter, 90
Reference numeral 9 denotes a switchboard, and 910 denotes an AC electric wire.

The wall panel 906 used in the sixth embodiment is
A DC input unit is provided on the roof-side upper surface of the wall panel 906,
In addition, a DC output unit can be taken out indoors on the second floor, and an AC input unit from the system power circuit 907 is provided from the outside on the first floor, and an AC output unit is provided indoors on the second floor. In addition, both the AC and DC output units on the second floor were separately arranged independently of each other. Waterproof bushings were used for both AC and DC input sections. Other configurations are
This is similar to the first embodiment.

As described above, by incorporating the AC wires 910 in the wall panel 906, the wiring work of the AC wires 910 can be easily performed. In addition, by arranging both cross-flow output units in the same room, the connection box 902,
Installation work of a system for system cooperation such as a cross-current converter 903 and a switchboard 909 can be easily performed. further,
By arranging the cross-flow output units separately and independently,
Even in the event of a fire, a secondary disaster can be prevented and safety can be improved.

<Embodiment 7> The building with a solar cell provided with a wall panel and a DC power supply according to the embodiment 7 is different from the building with a solar panel provided with the wall panel and the DC power supply according to the embodiment 1 with the solar cell. Was installed on a wall to extract power. The solar cell was one string, and the DC input part was arranged on the outdoor side of the wall. Other configurations are the same as in the first embodiment.

FIG. 10 is a schematic sectional view of a building with solar cells provided with a wall panel and a DC power supply according to Embodiment 7 of the present invention.

Referring to FIG. 10, reference numeral 1001 denotes a solar cell;
002 indicates a DC-DC converter, and 1003 indicates an electric wire.

FIG. 11 shows a diagram of the DC output section. FIG.
FIG. 13 is a schematic sectional view showing a DC output unit of a wall panel according to Embodiment 7 of the present invention.

In FIG. 11, reference numeral 1101 denotes a panel-shaped solar cell; 1102, an electric wire; 1103, a DC-DC converter; 1104, a heat insulating material; 1105, a floor panel;
6 is a ceiling panel on the first floor, 1107 is an interior material of a wall panel,
Reference numeral 1108 denotes a connector.

The wall panel used in the seventh embodiment is shown in FIG.
As shown in the figure, having a DC input section on the outdoor side of the wall panel,
In addition, a DC output unit is provided in the room on the second floor. In addition, the electric wire 1102 has a portion that faces upward before being drawn into the wall panel from the panel-shaped solar cell 1101. Furthermore, a waterproof bushing (not shown) is provided on the DC input section.
And a connector 1108 was attached to the end of the electric wire 1102 on the DC input unit side. Other configurations are the same as in the first embodiment.

As described above, even when the panel-shaped solar cell 1101 is mounted on the wall panel, it is possible to connect using the connector 1108 by embedding the electric wire 1102 in the wall panel in advance. Wiring work can be performed easily. In addition, when the electric wire 1102 has a portion that faces upward and is drawn into the wall panel, waterproofness can be improved.

[0146]

The wall panel of the present invention, the building with a DC power supply using the wall panel, and the method of constructing the same have the above-described configuration, and therefore can provide the following effects.

That is, the wiring work of the electric wires can be easily performed by incorporating the electric wires in advance and using the wall panel having the polarity indication of the electric wires.

Further, by having a plurality of DC input sections and a DC output section, incorporating wires for connecting the respective DC input sections and the DC output section, and having a wiring-related display means, a plurality of solar cells can be provided. Even in the case where a string is provided, the wiring operation can be easily performed.

Further, by using a connector for the DC input section, the connection work can be easily performed, and the construction contractor can perform the electrical connection work during the construction work, so that the construction period can be shortened. it can. Also, by using a waterproof type connector, even if a rain leak occurs, an electric shock accident can be prevented. Furthermore, by using a connector of a type that cannot be inserted with a different polarity, a connection error can be completely prevented.

Further, by separating the electric wire between the positive electrode and the negative electrode, safety in the event of a fire or the like can be improved. Further, by covering the electric wire with an insulating noncombustible material or a flame retardant material, safety can be further improved.

Further, in the case where both cross-current electric wires are incorporated in the wall panel, by disposing both electric wires, particularly the output unit, apart from each other, it is possible to prevent the occurrence of a secondary disaster in the event of a fire or the like. Can be prevented. Further, by covering the electric wire with an insulating noncombustible material or a flame retardant material, safety can be further improved.

Further, it has a DC input section and a DC output section having a ground display, and has a built-in electric wire connecting the DC input and output, so that when a DC power supply having an outer shell conductor section is used, the ground wire can be used. Wiring work can be easily performed.

Further, in addition to the DC input section and the DC output section, it has an AC input section and an AC output section, and by incorporating a wire connecting the AC input section and the AC output section, the system can be easily linked. Can be built. Further, by providing the DC and AC input / output units independently, safety in the event of a fire or the like can be improved.

Further, the DC input section on the roof side of the wall is:
By providing it above the ceiling surface, the aesthetics of the room can be improved, and even if a roof fire occurs, it is possible to prevent smoke from flowing into the room through the through hole of the electric wire. be able to.

Also, even if a rain leak occurs, the electric wire taken out from the roof is drawn into the wall with an upwardly directed portion, or a waterproof bushing is attached to the DC input portion of the wall. , Electric shock accidents can be prevented.

Further, by making the DC output part of the wall an outlet or a terminal block embedded in the wall, the connection work can be easily performed.

Further, since the DC and AC wires are mixed on the wall, both AC and DC power can be extracted from the same wall.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view of a building with a solar cell provided with a wall panel and a DC power supply according to a first embodiment.

FIG. 2 is a schematic sectional view illustrating a DC input unit of the wall panel according to the first embodiment.

FIG. 3 is a schematic cross-sectional view illustrating a DC output unit of the wall panel according to the first embodiment.

4A and 4B show the wall panel of the present invention in which electric wires are embedded in advance, wherein FIG. 4A is an exploded perspective view of the wall panel for explaining a manufacturing method thereof, and FIG. 4B is an exploded perspective view of the completed wall panel. FIG.

FIG. 5 is a schematic sectional view of a building with a solar cell provided with a wall panel and a DC power supply according to a second embodiment.

FIG. 6 is a schematic cross-sectional view of a building with a solar cell provided with a wall panel and a DC power supply according to a third embodiment.

FIG. 7 is a schematic cross-sectional view of a building with a solar cell provided with a wall panel and a DC power supply according to a fourth embodiment.

FIG. 8 is a schematic cross-sectional view of a building with a solar cell provided with a wall panel and a DC power supply according to a fifth embodiment.

FIG. 9 is a schematic cross-sectional view of a building with solar cells that uses a wall panel incorporating a DC electric wire and an AC electric wire according to Example 6 to establish system cooperation.

FIG. 10 is a schematic cross-sectional view of a building with a solar cell provided with a wall panel and a DC power supply according to a seventh embodiment.

FIG. 11 is a schematic sectional view illustrating a DC output unit of a wall panel according to a seventh embodiment.

FIG. 12 is a schematic cross-sectional view showing a state where an output wire of a solar cell is drawn indoors in a conventional building having a solar cell installed on a roof.

FIG. 13 is a schematic cross-sectional view showing a state where an output wire of a solar cell is drawn indoors in a conventional building having a solar cell installed on a wall surface.

14A and 14B show a wall panel to which a bushing is attached, wherein FIG. 14A is a schematic cross-sectional view showing a state in which an electric wire is passed through the bushing, and FIG. 14B is a schematic view showing a state in which a terminal block is fixed via the bushing. It is sectional drawing.

FIG. 15 is a block diagram illustrating a schematic configuration of electric wiring in the building with a solar cell according to the first embodiment.

[Explanation of symbols]

101, 701, 801, 901, 1001, 1101
... Solar cells 201, 501, 601, 1201 ... Roof material integrated solar cells 102, 302, 405, 707, 807 ... DC output units 103, 202, 502, 602, 1003, 120
2, 1302 ... Electric wires 104, 207, 507, 607, 704, 804, 9
05, 1204 ... Roof panels 105, 206, 303, 506, 606, 705, 8
05, 906, 1206 ... wall panels 106, 208, 508, 608, 706, 806 ...
DC input units 203, 301, 403, 503, 603, 703, 8
03, 904, 1102, 1302, 1401 ... DC electric wires (wall panel built-in part) 204, 504, 604, 1108 ... electric wire connection parts (connectors) 205, 306, 505, 605, 1104, 120
7, 1304: heat insulating material 304, 1105: floor panel 305, 1106: first-floor ceiling panel 307, 1208: hanging tree 308, 902, 1502 ... connecting box 309, 702, 802, 1002, 1103, 150
3 DC / DC Converter 401 Frame Material 402 Plywood 404 Hole Drilled in Plywood 509 Ground Wire 510 Ground Wire Connector 907 System Power Circuit 908 Integrated Power Meter 909 Switchboard 910 AC Wire 1107 1305: Interior material of wall panel 1203: Rafter 1205: Ceiling panel 1209: Adjusting material 1210: Eave ceiling 1301: Solar cell mounted on wall 1303: Exterior material 1306: Hole for passing electric wire 1402: Bushing 1501: Solar cell string 903 … Cross-flow exchange (inverter) 1403… Terminal block

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) E04D 3/40 E04D 3/40 V 13/18 13/18 H01L 31/042 H02G 1/06 501A H02G 1 / 06 501 3/02 301H 3/02 301 3/22 A 3/22 H01L 31/04 R 3/38 H02G 3/28 BF term (reference) 2E002 FB07 FB16 GA01 GA06 MA47 MA52 2E108 GG16 KK01 KK04 LL01 LL04 MM00 NN07 5F051 BA03 BA11 JA08 JA09 JA20 5G357 CA02 CB05 CC01 5G363 AA01 BA01 CB08 CB11 DB06

Claims (20)

[Claims] A DC input unit and a DC output unit; and an electric wire for connecting the DC input unit and the DC output unit;
A wall panel comprising a polarity display means for displaying the polarity of the electric wire. 2. A plurality of DC input units and DC output units,
A plurality of wires for connecting the DC input sections and the DC output sections, and wiring display means for displaying a wiring relationship between the DC input sections and the DC output sections. Features wall panels. 3. The wall panel according to claim 1, wherein the DC input section comprises a connector. 4. The wall panel according to claim 3, wherein the connector has a waterproof property. 5. The wall panel according to claim 3, wherein the connector cannot be inserted with a different polarity. 6. The wall panel according to claim 1, wherein the electric wire has a positive electrode side and a negative electrode side separated from each other. 7. The electric wire according to claim 1, wherein the electric wire is coated with a non-combustible material or a flame-retardant material having an insulating property.
Or the wall panel of 2. 8. The wall panel according to claim 1, wherein the DC input section and the DC output section have a ground display. 9. The DC input unit is provided with a waterproof bushing.
A wall panel as described. 10. An AC input part and an AC output part, and an electric wire connected to the AC input part and the AC output part, wherein the DC input part, the DC output part, the AC input part and the AC output part are connected to each other. Is DC / AC, which indicates DC / AC
3. The wall panel according to claim 1, further comprising an AC display unit. 11. The wall panel according to claim 10, wherein the DC input section and the DC output section and the AC input section and the AC output section are provided independently of each other. 12. A building with a DC power supply, comprising the wall panel according to claim 1 or 2, and a DC power supply, wherein an electric wire of the wall panel and the DC power supply are connected. 13. The building with a DC power supply according to claim 12, wherein the DC power supply is a solar cell. 14. The building with a DC power supply according to claim 12, wherein the DC input section on the roof side of the wall panel is provided above a ceiling surface. 15. The electric wire according to claim 12, wherein the electric wire is drawn into the wall panel with an upwardly directed portion.
Building with DC power supply as described. 16. The building with a DC power supply according to claim 12, wherein the DC output section of the wall panel is located indoors. 17. The building with a DC power supply according to claim 12, wherein the DC output section of the wall panel is located outdoors. 18. The DC output unit of the wall panel is located both indoors and outdoors.
2. A building with a DC power supply as described in 2. 19. The building with a DC power supply according to claim 12, wherein the DC output section of the wall panel is formed of an outlet or a terminal block embedded in the wall panel. 20. A method of constructing a building with a DC power supply, wherein the DC power supply and the electric wires are electrically connected using a wall panel in which electric wires are built in advance.