JPH0322546B2 - - Google Patents

Description

[Detailed description of the invention] [Technical field to which the invention pertains] The present invention relates to a DC power generation device as main components, a power storage device for storing the power generated by the power generation device, and a DC power supplied from the DC power generation device or the power storage device. This invention relates to residential power generation equipment that is equipped with a power conversion device that converts AC power into alternating current power and is intended to supply power to electrical equipment used in houses that have stairs leading from rooms on the first floor to attics or rooms on the second floor. This type of power generation equipment does not require an unreasonably large amount of space for the house when installed, nor does it impair the livability that is essential to the house, is convenient for necessary inspection and maintenance, and is safe from accidents such as disasters. It is essential that the product is safe and secure.

[Prior art and its problems]

This is the 6th residential power generation equipment 11 of this type in the past.
It is common to have a configuration as illustrated in the figure. That is, a DC power generation device, in this case, a required number of solar cell modules 1, a power storage device, in this case, lead-acid batteries 2, and the solar cell module 1.
Or electrical equipment 1 used in a house by a power converter device supplied with DC power from a lead-acid battery 2, in this case a power generation equipment 11 consisting of an integrated structure of an inverter device 3 and its auxiliary equipment.
The device is designed to supply the necessary power to 2. At that time, in the power generation equipment, the lead acid battery 2
A terminal voltage monitoring device 4 is provided for, and when the lead acid battery 2 is overcharged by the solar cell module 1 and its terminal voltage exceeds a predetermined operating voltage value,
The DC side switch 5 that connects the solar cell module 1 and the lead acid battery 2 is opened to stop the solar cell module 1 from charging the lead acid battery 2, and then the lead acid battery 2 is discharged appropriately, so that the terminal voltage of the lead acid battery 2 reaches a predetermined level. When the voltage drops to the operating voltage value, the DC side switch 5 closes again so that the lead-acid battery 2 is charged, and if the lead-acid battery 2 is over-discharged for some reason and its terminal voltage is lower than the predetermined operating voltage value. When the voltage decreases to 100%, the AC side switch 6 that connects the inverter device 3 and the electrical equipment 12 serving as a load opens and stops power supply to the electrical equipment 12, thereby preventing further discharge of the lead-acid battery 2. After that, when the lead-acid battery 2 is properly charged and the terminal voltage of the lead-acid battery 2 is restored to a predetermined operating voltage value, the AC side switch 6 is closed again to supply power to the electrical equipment 12, thereby reducing the overload of the lead-acid battery 2. Care has been taken to prevent damage caused by charging or over-discharging. Furthermore, in some cases, as shown by the broken line in Fig. 6, it is not uncommon to connect to an external power source 13, such as an electric power company's distribution system, to configure a dual power supply system for convenience. .

When the residential power generation equipment 11 as described above is actually installed in a house, for example, as illustrated in FIGS. From this point of view, it is usually fixed to the south-facing roof of the house 14 using appropriate support means, but on the other hand, when a lead-acid battery is used as the electricity storage device 2, the first problem is that the storage battery is overcharged or even overcharged. Even if the battery is not fully charged, a portion of the electric power used to charge the lead-acid battery 2 causes the internal electrolyte to electrolyze and generate hydrogen and oxygen. Therefore, when installing a large number of lead-acid batteries, The equipment falls under Article 13 of the Fire Prevention Ordinance Regulations (according to Article 9 of the Fire Service Act) and is obligated to take prescribed disaster prevention measures.Secondly, as the usage time elapses, In order to prevent the performance of the storage battery 2 from deteriorating as a result of changes in the specific gravity or reduction of the electrolyte in the lead-acid battery 2, necessary inspection and maintenance, such as replenishment of distilled water, is carried out especially by people other than residents of the house. For reasons such as the need to be able to carry out maintenance work at any time and at will by professional maintenance personnel, residential buildings 1
It is preferable that the lead-acid battery 2 is installed inside a storeroom-like building 15 that is located on the same site and separated from the lead-acid battery 2. In this case, the power conversion device that is electrically closely related to the lead-acid battery 2, in this case the inverter device 3 itself, is generally placed in the same building. In that case, the building 15
The lead-acid battery 2 and the inverter device 3 inside the building 15 are connected to the solar cell module 1 on the roof of the residential building 14 by appropriate connecting wires 7, but in this case technically the building 15 It is preferable to provide a power receiving terminal box 8 inside the power receiving terminal box 8. As part of the disaster prevention measures, ventilation fans 9 are installed at appropriate locations in the building 15 in order to dissipate hydrogen generated by decomposition of the electrolyte of the lead acid battery 2 into the atmosphere outside the building 15 as quickly as possible. It is desirable to do so.

However, as mentioned above, in the conventional power generation equipment in which the lead-acid battery 2, the inverter device 3, and all of their auxiliary equipment are housed inside the storage-like building 15,
In the lead-acid battery 2 and inverter device 3 due to the accumulation of dust, especially conductive dust, that enters together with the outside air that enters in place of the exhaust air from inside the building due to the operation of the ventilation fan 9 installed in the building 15. The inverter is caused by thermal deterioration due to deterioration of insulation and reduction in heat dissipation ability, or atmospheric contamination by trace amounts of dilute sulfuric acid gas leaking from the lead-acid battery 2, which cannot be eliminated despite the installation of the ventilation fan 9. In addition to inconveniences such as functional deterioration of electronic components of the device 3, the connecting wire 7 from the solar cell module 1 to the building 15
If the wiring is buried underground, the construction cost will be heavy, and if the wiring is installed overhead, the scenery of the entire residence will be spoiled, and in some cases, the site area required for installing the building 15 may be too large for the residence. This inevitably involves drawbacks such as the possibility of becoming an obstacle to the effective use of the residential site as intended by the individual.

[Purpose of the invention]

In view of the above-mentioned drawbacks of conventional residential power generation equipment, the present invention provides an electrical solution for cooling main electrical equipment such as lead-acid batteries and inverter devices, or for ventilation of the atmosphere in the equipment storage area for disaster prevention reasons. In addition, it will be possible to supply air that contains significantly less harmful dust in terms of cooling effect, and it will also free you from the burden of securing a separate site for installation, as well as requiring specialized maintenance staff as needed. The purpose of the present invention is to provide residential power generation equipment that is easy to inspect and maintain from time to time.

[Key points of the invention]

In order to achieve the above object, the present invention provides the above-mentioned power generation equipment, in which the space constituted by the stage and the outer wall and side wall of the house is partitioned by an appropriate partition wall and communicated with the underfloor space of the house, and is mutually independent. The power storage device is placed in one of the two rooms closer to the outer wall, and the power storage device is placed in the other room closer to the stairs. The converters are respectively disposed, and an appropriate vent is provided above the partition wall to communicate the power converter chamber and the power storage device chamber with each other, and above the outer wall, the power storage device chamber is connected to the outside world. Appropriate communicating ventilation holes are provided respectively, and a means for entering and exiting the room for the power storage device is provided in the outer wall, and the power storage device and the power conversion device are usually installed on the roof of the house via appropriate connection means. By electrically connecting to the DC power generating device that is connected to the power converter, the power converter room and the electricity storage device room are connected to the power converter room and the power storage device room from the underfloor space of the house through each of the vents that communicate with the underfloor space. The power exchange takes advantage of the natural circulation of cold air in the underfloor space of the house that flows in, rises due to the chimney effect, and flows out to the outside world through the vents provided above the bulkhead and above the external wall. This ventilates and cools the atmosphere in the device chamber and the charging device chamber.

[Embodiments of the invention]

Next, details of the present invention will be explained based on embodiments shown in the drawings.

As shown in FIG. 1 or FIG. 2, a residential house is constructed on a general residential ground 1608 and has an attic or second floor room 1652. In the part 16 where the leading staircase 1604 is provided, the outer wall 1601 of the house, the floor part 16 of the attic or second floor room 1652
03, the floor 1602 of the room 1651 on the first floor, the side walls 1607 on both sides, and the back plate 1605 as necessary
An irregular space 1653 substantially surrounded by the stairs 1604 is provided perpendicularly to the floor 1603 of the attic or second floor room 1652 and the floor 1602 of the first floor room 1651, The two chambers 16 are separated by a bulkhead 1611 supported on the ground 1608 by a foundation 1616.
It is divided into 21 and 1622.

A ceiling plate 1606 is provided in the upper part of the chamber 1621 as necessary, and an outer wall 160 is provided in the lower part.
A floor 1619 is formed of mortar or other suitable material so as to be connected to the base 1609a of the first wall and the base 1609b of the side wall, and in some cases, the floor 1619 is sloped from the partition wall 1611 side toward the outer wall 1601 side. It is best to measure the amount of waste water. Further, a vent 1618 communicating with the underfloor space 1610 of the room 1651 on the first floor is appropriately provided in the foundation 1616 of the partition wall 1611 and, if necessary, in the foundation 1609b of the side wall 1607.
601 said attic or second floor room 16
By providing a vent 1613 below the floor portion 1603 of the 52 or, if the ceiling plate 1606 is provided, at a location as high as possible below the ceiling plate 1606, the vent 16 is removed from the underfloor space 1610.
18 into the chamber 1621, rises inside the chamber 1621 due to the chimney effect, and flows into the vent hole 1.
613 to the outside world, allowing natural circulation of the cold air within the underfloor space 1610. In this case, it is advantageous for the purpose of ventilation of the room 1621 to make the ceiling plate 1606 sloped so as to promote the outflow of the cold air rising in the room 1621 from the vent hole 1613. be.

On the other hand, the chamber 162 is separated by the partition wall 1611.
The other room 1622 adjacent to 1 has the partition wall 1611 of the floor 1602 of the room 1651 on the first floor.
A unique ventilation hole 1615 communicating with the underfloor space 1610 is appropriately provided in a portion adjacent to the underfloor space 1610, and a ventilation hole 1612 provided at the highest possible location of the partition wall 1611 allows the adjacent chamber 1621
is connected to. In this case, it is important that the position of the vent hole 1612 is lower than the position of the vent hole 1613 provided in the outer wall 1601 for the sake of ventilation effect.

By doing as described above, the underfloor space 16
10 flows into the interior of the chamber 1622 through the vent 1615 and rises inside the chamber 1622 due to the chimney effect.
After once flowing into the adjacent room 1621 through the air, the cold air rising inside the room 1621 joins with the cold air and flows into the partition wall 1611 provided on the outer wall 1601.
Natural circulation of the cold air is also performed by being discharged from a vent hole 1613 located at a higher position than the vent hole 1612 provided at the top. At this time, if a back plate 1605 is provided on the stairs 1604, the effect of promoting the circulation of cold air for ventilation of the room 1622 can be obtained.

In the residential power generating apparatus of the present invention, the chamber 1621 and the chamber 162 as explained in FIG. 1 and FIG.
2, as shown in FIG. 3, an appropriate pedestal 21 is installed near the surface of the partition wall 1611 on the side of the chamber 1621, and the necessary number of lead-acid batteries 2 are arranged and fixed on the pedestal 21, and Room 1622
The inverter device 3 is mounted on a suitable mount so that the cold air flowing from the underfloor space 1610 through the vent 1615 can be cooled from both the front and back surfaces by maintaining an appropriate distance between the inverter device 3 and the surface of the partition wall 1611 on the side. 31 or directly mounted on the partition wall 1611.

By configuring as described above, the underfloor space 1
Due to the low temperature inside 610, the dust contained in the ground 160
A portion of the relatively clean air that has settled on the air vent 161 as shown by the arrow in FIG.
8 into the chamber 1621, and while cooling the lead acid battery 2, it rises together with the dilute sulfuric acid gas leaking from the battery 2 and flows out to the outside world through the vent 1613, thereby reducing the temperature of the chamber 1621. In addition to constantly ventilating the internal atmosphere, a portion of the air in the underfloor space 1610 flows into the room 162 through the vent 1615 as shown in FIG.
The lead acid battery 2 Alternatively, while effectively cooling the inverter device 3, it is possible to prevent the accumulation of dust that is electrically and thermally harmful to the lead-acid battery 2 or the inverter device 3, and to reduce their insulation resistance or cause local overheating. In addition, it is possible to prevent the electronic components of the inverter device 3 from being damaged by the dilute sulfuric acid gas leaking from the lead acid battery 2.

Furthermore, in another embodiment illustrated in FIG. 4, a vent hole 163 is provided in the outer wall 1601 at a higher position than the vent hole 1612 provided in the partition wall 1611, and is separate from the vent hole 1613 in the outer wall.
1 is provided, and a ventilation duct 1632 is appropriately provided between the ventilation port 1612 provided in the partition wall 1611 to form an independent ventilation passage that communicates with each other. By arranging the exhaust gas to be exhausted to the outside world independently of each other, dilute sulfuric acid gas leaking from the lead-acid battery 2 disposed inside the chamber 1621 will not enter the chamber 1622 even if it accidentally leaks. Since this can be prevented, electronic components of the inverter device 3 installed inside the chamber 1622 can be more securely protected from damage due to atmospheric contamination.

〔Effect of the invention〕

As described above, the present invention includes a DC power generation device as main components, a power storage device that stores the power generated by the power generation device, and a power converter that converts the DC power supplied from the DC power generation device or the power storage device into AC power. In a residential power generation facility that is equipped with a device and is intended to supply power to electrical equipment used in a house that has stairs leading from a room on the first floor to an attic or a room on the second floor, said stage and the exterior wall of said house The space constituted by the housing and the side wall is divided by an appropriate partition wall, and is provided with appropriate mutually independent ventilation holes communicating with the underfloor space of the house.
The power storage device is arranged in one of the two rooms closer to the outer wall, and the power converter is arranged in the other room closer to the stage, and the partition wall An appropriate vent is provided above the chamber of the power conversion device and the chamber of the power storage device to communicate with each other, and an appropriate vent is provided above the outer wall to communicate the chamber of the power storage device with the outside world. , and the outer wall is provided with a means for entering and exiting the room for the power storage device, and the power storage device and the power conversion device are electrically connected to the DC power generation device usually installed on the roof of the house through an appropriate connection means. By connecting to the The power storage device and the power conversion device are housed in a space, there is no need to prepare a separate site for installing the main components, and the DC power generation device, the power storage device, and the power conversion device are electrically connected to each other. In addition to eliminating the need for economically burdensome underground wiring or unsightly overhead wiring, self-circulation of relatively clean cold air within the space under the floor of the house allows cooling or storage of the power storage device or power converter in the storage room. Since the atmosphere can be ventilated, the power required for ventilation fans can be saved, and the dielectric strength of the above devices can be reduced due to accumulation of dust, and the electronic components of power conversion equipment can be protected from local overheating or dilute sulfuric acid gas leaking from power storage devices. Since it is possible to prevent pollution and the like, it has a significant technical and economical advantage.

[Brief explanation of drawings]

1 and 2 are a schematic side view and a schematic plan view showing a space for housing the power storage device and the power conversion device in the power generation equipment of the present invention, and FIG. 4 and 5 are schematic side views and a schematic plan view of different embodiments of the space shown in FIGS. 1 and 2, and FIG. 6 is a schematic side view showing an example of the arrangement. 7 and 8 are conceptual diagrams showing the arrangement of the main components of a conventional residential power generation facility. 1... DC power generation device, 2... Power storage device, 3...
Power conversion device, 11... Residential power generation equipment, 12...
... Load electrical equipment, 16 ... Part where stairs are installed in the house, 1601 ... External wall, 1604 ... Stairs, 1607 ... Side wall, 1610 ... Underfloor space,
1611... Bulkhead, 1612, 1613, 161
5,1618,1631,1641...Vent,
1614... Means of access, 1632... Ventilation duct, 1651... Room on the first floor, 1652... Room on the attic or second floor, 1653... Irregular space formed by stairs, outer walls, and side walls.

Claims (1)

[Scope of Claims] 1 Main components include a DC power generation device, a power storage device that stores the power generated by the power generation device, and a power conversion device that converts the DC power supplied from the DC power generation device or the power storage device into AC power. Prepare,
In residential power generation equipment that is intended to supply power to electrical equipment used in a house that has stairs leading from a room on the first floor to an attic or a room on the second floor, the power generation equipment is provided by the stairs and the exterior wall and side wall of the house. The constructed space is partitioned by an appropriate partition wall to form two rooms equipped with appropriate mutually independent ventilation openings that communicate with the underfloor space of the house, and of the two rooms, the side closer to the outer wall is The power storage device is placed in one room, and the power conversion device is placed in the other room closer to the stairs, and the power conversion device room and the power storage device room are connected to each other above the partition wall. A suitable ventilation hole is provided above the outer wall to communicate the chamber of the power storage device with the outside world, and a means for entering and exiting the chamber of the power storage device is provided in the outer wall. A power generation facility for residential use, characterized in that the device and the power conversion device are electrically connected to the DC power generation device usually installed on the roof of the house through appropriate connection means. 2. In the power generation equipment according to claim 1, the appropriate ventilation hole is provided in the outer wall at a higher position than the appropriate ventilation hole provided above the partition wall of the outer wall, and is separate from the appropriate ventilation hole. A power generation facility for residential use, characterized in that a suitable ventilation hole is provided in the partition wall, and a ventilation duct is provided between the ventilation hole and the appropriate ventilation hole provided above the partition wall to communicate with each other.