JP2021184446A - Housing of power apparatus - Google Patents

Abstract

To provide a technique that can effectively drain rain water entering the inside of a housing for leading wire provided on the bottom of a main body of a power apparatus that is installed on a wall surface of a building.SOLUTION: A housing of a power apparatus is installed on a wall surface of a building, and has a main body into which a plurality of wires are led from a bottom face and a lower housing that is attached to the bottom of the main body. The lower housing comprises at least a first member that opens in its top face to be on a bottom side of the main body while attached to a bottom of the main body and includes a back opening for receiving the wires on its back to be on the wall surface side. Back side drainage holes in a shape having a longitudinal direction are provided in a bottom face in the vicinity of the boundary between the back opening of the first member and a wall part forming the back of the first member.SELECTED DRAWING: Figure 4

Description

The present invention relates to a housing of an electric power device installed on a wall surface of a building, and more specifically to a drainage mechanism of the housing.

In a conventional photovoltaic power generation system, the DC power generated by a solar cell is converted into an appropriate DC power and / or an appropriate AC power by a power conditioner (Power Conditioning System). The converted power is output to the switchboard or to an external power system. Therefore, in the housing of the power conditioner, the wiring for inputting the electric power from the solar cell and the wiring for outputting the electric power to the external device are drawn in and connected to various terminals.

Many electric power devices including such power conditioners are installed on the wall surface of a building. Electric power equipment installed on the wall surface of such a building facilitates the work of connecting wiring to various connection terminals (wiring connection work) while maintaining the aesthetics of the surroundings of the device, so that it can be pulled into the housing. It is known that a separate housing (hereinafter referred to as a wiring box) for receiving wiring is provided on the bottom side of the housing (see, for example, Patent Document 1).

Since (the housing) of the electric power equipment having such a configuration installed outdoors is exposed to wind and rain, the rain travels along the side surface of the electric power equipment main body, and the joint between the electric power equipment main body housing and the wiring box is formed. Invades the inside of the wiring box.

If the rainwater that has entered in this way accumulates in the wiring box, the water may evaporate and enter the main body of the electric power device, or water may enter the wall hole of the building for drawing in the wiring. Is required.

It is conceivable to have a closed structure at the joint between the housing of the electric power device and the wiring box to prevent rainwater from entering, but such a means has a drawback that the cost is high.

In this regard, in the invention described in Patent Document 1, since the drainage hole for water that has entered the inside is provided in the center of the bottom surface of the wiring box, it is a measure to avoid cost increase due to the closed structure.

Japanese Unexamined Patent Publication No. 2019-201549

By the way, since rainwater usually invades along the housing of the wiring box (particularly, the joint portion of a plurality of members), a large amount of rainwater is stored in the wiring box along the inner wall constituting the housing.

The present invention has been made in view of the above circumstances, and provides a technique capable of effectively draining rainwater that has entered the wiring lead-in housing provided at the bottom of the main body of the electric power device. With the goal.

In order to solve the above problems, the housing of the electric power device according to the present invention is
It is a housing of an electric power device installed on the wall surface of a building, and has a main body in which a plurality of wirings are drawn from the bottom side and a lower housing attached to the bottom of the main body.
The lower housing is
It is provided with at least a first member having a back opening for receiving the wiring on the back side, which is the wall surface side, while opening to the upper surface side, which is the bottom side of the main body, in a state of being attached to the bottom of the main body.
The bottom surface in the vicinity of the boundary between the back opening of the first member and the wall forming the back surface of the first member is characterized in that a back drain hole having a shape having a longitudinal direction is provided. do.

Here, "electric power equipment" refers to equipment that converts electric power into other energy, stores electric power, converts electric power into voltage, adjusts power factor, and connects / disconnects electric power, for example, a power conditioner or The peripheral equipment (for example, a transformer unit, a power measurement unit, etc.) and the like are included. Further, the "lower housing" does not need to store electric power equipment, and includes, for example, a wiring box in which only wiring such as electric wires is stored. Further, only items other than equipment such as tools may be stored.

According to the above configuration, in the wiring box provided at the bottom of the housing of the electric power device, the rainwater that has entered the inside of the drainage box can be efficiently discharged, so that the intrusion of rainwater can be prevented. This mechanism can be omitted, and the manufacturing cost of the housing of the electric power device can be reduced. In addition, since the drainage hole has a shape having a longitudinal direction, it is possible to increase the surface area of the hole while reducing the width of the hole, and it is possible to efficiently drain water while suppressing the entry of foreign matter. Will be possible.

Further, the drainage hole on the back surface side may have a longitudinal direction in the left-right direction toward the wall surface. With such a configuration, drainage holes are formed along the back surface of the housing in which rainwater enters, so that drainage can be performed more efficiently.

Further, the electric power device is connected to a conduit in which the wiring is housed at the rear opening.
The lower housing includes a second member that is coupled to the first member at the back opening and prevents the connection portion with the electric wire duct from being exposed.
The back surface side drainage hole may be provided on the bottom surface of the first member in the vicinity of the coupling structure with the second member.

As for the joint portion with other members, rainwater easily infiltrates. With such a configuration, a drainage hole can be provided along the vicinity of the portion where rainwater easily infiltrates, so that rainwater can be efficiently discharged. It will be possible to discharge.

Further, the first member is provided with two back openings symmetrically toward the wall surface, and the back side drain holes are provided for each of the two back openings.
Left and right identification drain holes may be further provided in the vicinity of any of the two back openings in such a manner that the left and right sides of the back opening can be discriminated.

In the manufacturing process of a member having a symmetrical structure, if the structure is not easy to distinguish between the left and right, work mistakes may occur or it may take time to confirm, resulting in a decrease in work efficiency. turn into. In this respect, with the above configuration, even if the wiring box has symmetrical openings, it is easy to distinguish the left and right by checking the drain holes, so that it is possible to prevent a decrease in work efficiency. Can be done.

Further, the first member has an opening on the front side facing the back side.
The lower housing further includes a third member that is coupled to the first member in the vicinity of both side surfaces of the first member in a manner that covers the opening on the front side.
A front drainage hole having a shape in the longitudinal direction is further provided on the bottom surface of the first member in the vicinity of the boundary between the first member and the third member and in the vicinity of the coupling structure between the first member and the third member. May be.

With such a configuration, it is possible to remove the front lid of the rear box to facilitate easy maintenance inside the wiring box, and to prevent rainwater from entering from the joint portion between the front lid and the member to be coupled. It becomes possible to drain water efficiently.

Further, the front drainage hole may have a longitudinal direction in the depth direction between the front side and the back side. With such a configuration, drainage holes are formed along the side surfaces of the housing through which rainwater penetrates, so that drainage can be performed more efficiently.

Further, the first member may further include a bottom opening on the bottom surface side for receiving wiring connected to the power device. By providing a drainage hole along the wall surface near the joint of the members, it is possible to effectively use the vicinity of the center of the bottom surface of the wiring box. It becomes possible to provide an opening.

Further, the housing of the power equipment is a housing of the power equipment installed on the wall surface of the building, and includes a main body in which a plurality of wirings are drawn from the bottom side and a lower housing attached to the bottom of the main body. Have and
The lower housing is
A fourth member that opens an upper surface side that is the bottom side of the main body and a front side that faces the wall surface side when attached to the bottom of the main body.
A fifth member that is coupled to the fourth member in the vicinity of both side surfaces of the fourth member is provided so as to cover the opening on the front side of the fourth member.
A front drainage hole having a shape having a longitudinal direction is provided on the bottom surface of the fourth member near the boundary between the fourth member and the fifth member and near the coupling structure between the fourth member and the fifth member. It may be the one that has.

With such a configuration, even if the back side of the wiring box is made waterproof (sealed) and the wiring is pulled in from the bottom, it is efficient at the joint with the front lid. It becomes possible to drain water.

It should be noted that each of the above configurations can be combined with each other to construct the present invention as long as no technical contradiction occurs.

INDUSTRIAL APPLICABILITY According to the present invention, it is possible to provide a technique capable of effectively draining rainwater that has entered the wiring lead-in housing provided at the bottom of the housing body of the electric power device.

FIG. 1 is a perspective view showing a schematic configuration of a power conditioner according to an embodiment. FIG. 2 shows the configuration of the power conditioner according to the embodiment, and is a front view showing the state of the power conditioner attached to the wall surface and with the front cover removed. FIG. 3 is a perspective view showing a schematic configuration of the wiring box according to the embodiment. FIG. 4 is a plan view showing a schematic configuration of the wiring box according to the embodiment. FIG. 5 is an exploded perspective view showing a schematic configuration of a main member and a back guide member of the wiring box according to the embodiment. FIG. 6 is an explanatory diagram illustrating a state of a main member to which a back surface guide member is connected. FIG. 7 is an explanatory diagram illustrating a cross section taken along the line AA in FIG. 8A, 8B, and 8C are explanatory views illustrating changes in the state of the back guide member in each step for connecting the main member and the back guide member.

Hereinafter, embodiments relating to one aspect of the present disclosure will be described with reference to the drawings. However, unless otherwise specified, the dimensions, materials, shapes, relative arrangements, and the like of the components described in the following embodiments are not intended to limit the scope of the present invention to those alone.

<Application example>
First, an application example of the present invention will be described with reference to FIGS. 1 and 4. FIG. 1 is a perspective view showing the configuration of the power conditioner 10 according to the embodiment. FIG. 4 is a plan view showing the configuration of the wiring box 20.

As shown in FIG. 1, the power conditioner 10 has a substantially rectangular main body 11, a wiring box 20 attached to the front half on the lower side of the main body 11, and a left side of the wiring box 20 on the lower side of the main body 11. It is provided with a conduit 3 provided on the rear side.

FIG. 4 is a plan view showing the internal structure of the wiring box 20. The wiring box 20 is roughly composed of a main member 21 made of metal, a back guide member 22 made of resin, and a front lid 23, and has a structure in which the upper portion is open. The back guide member 22 is connected to the main member 21 by an engaging means described later, and the front lid 23 is connected to the main member 21 by a screw.

Since the wiring box 20 is attached to the lower side of the main body 11 of the power conditioner 10, rainwater travels along the side surface of the main body 11 and enters the wiring box 20 through the gaps between the joints of the members constituting the wiring box 20 in rainy weather. invade.

If the invading rainwater accumulates in the wiring box 20, inconveniences such as evaporation of the water and entry into the main body of the power conditioner occur. Is provided.

According to the configuration in which the drainage hole is provided near the place where the rainwater mainly enters, the rainwater that has entered the wiring box 20 can be quickly discharged to the outside, and the rainwater is stored in the wiring box 20. It is possible to effectively prevent this from happening.

<Embodiment 1>
Subsequently, the power conditioner 10 according to the present embodiment will be described in more detail with reference to FIGS. 1 to 8.

The power conditioner of the present embodiment is a power conditioner (Power Conditioning System) used in a grid interconnection system using photovoltaic power generation.

The grid interconnection system is composed of a plurality of solar cells installed on the roof of a house or the like, and a power conditioner that converts the DC power generated by each solar cell into AC power. In this grid interconnection system, the load connected between the power conditioner and the commercial power grid is switched between grid interconnection operation and independent operation to supply AC power. be. Here, the grid interconnection operation means that the power conditioner and the commercial power grid are connected and operated. Further, the self-sustaining operation means that only the power conditioner is operated, for example, when the commercial power system is out of power.

By the way, when the power conditioner is installed on the wall surface, the wiring exposed from the wall surface is pulled in from the bottom surface of the power conditioner body and connected to various connection terminals in the input side switch, output side terminal block, etc. of the power conditioner body. In some cases. In this case, the wiring drawn into the main body of the power conditioner is exposed, which is not preferable from the viewpoint of protection of the wiring and aesthetics. Therefore, the power conditioner according to the present embodiment is configured to provide a wiring box for accommodating the wiring inside.

FIG. 1 is a perspective view showing the configuration of the power conditioner 10. The power conditioner 10 is provided with a front cover 13 on the front side, and the front cover 13 can be attached to the main body 11 from the front side by a screw. In the present specification, the front side of the power conditioner 10 may be referred to as a front side, and the back side may be referred to as a rear side.

FIG. 2 shows the configuration of the power conditioner 10, and is a front view showing the configuration of the power conditioner 10 attached to the wall surface and with the front cover 13 removed. ―

As shown in FIGS. 1 and 2, the power conditioner 10 includes a wiring box 20 that can be attached to the bottom surface of the main body 11 to which a plurality of wirings 4 are drawn from the bottom surface, and a wiring box 20 that is below the main body 11 and is below the main body 11. It is provided with a conduit 3 provided on the rear side on the left side.

The wiring box 20 is provided to hide the wiring 4 drawn into the main body 11 through a main body wiring hole (not shown), and has an opening that opens from the upper surface to the back surface. The opening includes an upper surface opening 24 through which the plurality of wirings 4 pass from the inside to the main body 11, and a back wall opening 25 (rear opening) in which at least a part of the plurality of wirings 4 passes from the outside to the inside on the back side. Further, on the bottom surface side of the wiring box 20, a bottom surface opening 214 for connecting a conduit (PF tube) or the like in which wiring is housed is provided.

The conduit 3 is provided to hide the wiring 4 exposed from the wall surface (not shown). That is, the main body 11 is usually provided with various electric devices, connection terminals, etc. on the front side, and a fan, heat sink, etc. on the rear side (none of them are shown). The wiring box 20 is provided at a position of the front half on the lower side of the power conditioner 10. Therefore, there is a distance between the wall surface (not shown) and the back wall opening 25 of the wiring box 20, and the wiring 4 is exposed between them. Therefore, in the present embodiment, a conduit 3 is provided to conceal the wiring 4 exposed between the wall surface (not shown) and the back wall opening 25 of the wiring box 20.

Subsequently, the wiring box 20 according to the present embodiment will be described in more detail with reference to FIGS. 3 and 4. FIG. 3 is a perspective view showing the configuration of the wiring box 20, and FIG. 4 is a plan view showing the configuration of the wiring box 20.

As shown in FIGS. 3 and 4, the wiring box 20 has a bottomed box shape generally composed of a main member 21, a back guide member 22, and a front lid 23, and the upper surface is an opening on the upper surface. It is 24. Further, two back wall openings 25 are formed symmetrically on the back side of the main member 21.

The two back wall openings 25 are used for the wiring 4 to be drawn into the wiring box 20 through the conduit 3 through one of the back wall openings 25. In that case, the other back wall opening 25 needs to be closed because rainwater or the like will infiltrate if it is left open. Therefore, the other back wall opening 25 is sealed by a slideable and removable guide cover 26.

That is, the two back wall openings 25 have the same size so that the guide cover 26 can slide even if it is inserted into any of the back wall openings 25. Therefore, depending on the position where the wiring 4 is exposed from the wall surface, the conduit 3 can be installed on either the left or right side. As a result, the power conditioner 10 can be attached to various positions on the wall surface.

The wiring box 20 is configured by connecting a main member 21, a back guide member 22, and a front lid 23, which are separate members. The main member 21 and the front lid 23 are connected by screws, but the main member 21 and the back guide member 22 are connected by a special engaging method. This will be described in detail later.

The main member 21 of the wiring box 20 is formed by bending, drawing, or the like to roughly form a metal plate into a shape having a bottom surface portion, both side surface portions, and a back surface portion. It has a plurality of openings on the bottom surface.

Specifically, the back surface drainage hole 211 is provided on the bottom surface near the joint portion with the back surface guide member 22, and the front side drainage hole 212 is provided on the bottom surface near the joint portion with the front cover 23. .. Further, in the vicinity of the joint portion of one of the back wall openings 25 with the back guide member 22, a drain hole 213 for left / right identification is provided in order to make it possible to distinguish between the left and right sides of the back wall opening 25.

Further, as described above, a plurality of bottom openings 214 (four in the present embodiment) are provided for connecting a conduit (PF tube) or the like in which wiring is housed. A grommet may be attached to the bottom opening 214, or a cover may be attached to the unused bottom opening 214 to seal the bottom opening 214.

Each drain hole has a function of draining rainwater that has entered the inside of the wiring box 20, and the rear drain hole 211 is in the direction along the back surface of the wiring box 20 (that is, the left-right direction when viewed from the front). It has an oblong shape with a longitudinal direction. Further, the front drainage hole 212 has an oblong shape having a longitudinal direction in a direction along the side surface of the wiring box 20 (that is, a depth direction when viewed from the front). Due to the shape having such a longitudinal direction, it is possible to increase the surface area of the hole while reducing the width of the hole, and it is possible to efficiently perform drainage while suppressing the entry of foreign matter.

Since the left-right identification drainage hole 213 has a perfect circular shape, the drainage efficiency is lower than that of other drainage holes having an elliptical shape. However, since the position where the drainage hole 213 for left / right identification is arranged is on the back side and inside of the wiring box 20 (the side closer to the center in the left-right direction), the intrusion of rainwater is less than in other places, and the drainage efficiency is reduced. The negative effects of the decline are limited.

Next, with reference to FIGS. 5 to 8, a mechanism for connecting the main member 21 and the back guide member 22 will be described. Hereinafter, the configuration of the front lid 23 will be omitted. FIG. 5 is an exploded perspective view of the main member 21 and the back guide member 22. FIG. 6 is a diagram illustrating a state in which the back guide member 22 is connected and viewed from the front of the main member 21. FIG. 7 is a diagram illustrating a cross section taken along the line AA of FIG. FIG. 8 is a diagram illustrating changes in the state of the back guide member 22 in each step for connecting the main member 21 and the back guide member 22, and is a diagram showing a change in the state of the back guide member 22 in each process, and is a portion of the back wall opening 25 of the main member 21 and the back guide member 22. Includes a front view of and a corresponding side transmission view.

As shown in FIGS. 5, 6 and 7, the main member 21 includes a lower hook receiving portion 215, an upper hook receiving portion 216, and a rib receiving hole 217 as a configuration for connecting to the back guide member 22. There is. Among these configurations, the lower hook receiving portion 215 is formed by maintaining the back wall 21a from the bottom surface (that is, the lower end of the back wall) by a certain area and forming a convex shape in the back wall opening 25. Further, the upper hook receiving portion 216 is provided at the upper end portion of the back wall in a certain region from the left and right ends of the back wall opening 25. Further, a rib receiving hole 217 is provided in the middle (slightly above the center) between the upper hook receiving portion 216 and the lower end of the back wall 21a.

On the other hand, the back guide member 22 includes a lower hook portion 221, an upper hook portion 222, and a rib portion 223 as a configuration for connecting to the main member 21. The back guide member 22 is made of resin, and as shown in FIG. 5, has a bottomed box shape with an open upper side, and the plate-shaped portions constituting the front and back are the back of the main member 21. It is largely cut out to correspond to the wall opening 25. Then, a lower hook portion 221, an upper hook portion 222, and a rib portion 223 are formed on the surface 224a side of the front plate-shaped portion 224 that comes into contact with the main member 21.

The lower hook portion 221 is formed in a shape that is concave on the upper side in the vicinity of the lower end portion of the notched portion of the front plate-shaped portion 224. The upper hook portion 222 is formed in a shape that is concave on the upper side at the upper end of the uncut portion of the front plate-shaped portion 224. Further, the rib portion 223 is provided in the middle (slightly above the center) between the upper hook portion 222 and the lower end of the front plate-shaped portion 224. As shown in FIG. 6, the rib portion 223 is a substantially L-shaped protrusion having a horizontally convex portion and a vertically convex portion orthogonal to the horizontally convex portion.

The lower hook portion 221 and the lower hook receiving portion 215, the upper hook portion 222 and the upper hook receiving portion 216, respectively having the above configuration, are engaged with each other, and the rib portion 223 is inserted into the rib receiving hole 217. 21 joins the main member 21 and the back guide member 22. The flow for the coupling will be described with reference to FIG.

FIG. 8A is a diagram showing a state of the back guide member 22 in a state where the lower hook portion 221 is engaged with the lower hook receiving portion 215. Further, FIG. 8B is a diagram showing a state of the back guide member 22 in a state where the upper hook portion 222 is engaged with the upper hook receiving portion 216. Further, FIG. 8C is a diagram showing a state in which the rib portion 223 is inserted into the rib receiving hole 217 and the connection between the main member 21 and the back guide member 22 is completed.

First, the lower hook portion 221 is engaged so as to be hooked on the lower hook receiving portion 215. Then, as shown in FIG. 8A, the upper end of the back guide member 22 is slightly inclined in the direction away from the main member 21.

Next, the upper hook portion 222 is engaged so as to be hooked on the upper hook receiving portion 216. In this state, as shown in FIG. 8B, a part of the rib portion 223 is positioned slightly above the rib receiving hole 217 (that is, the rib portion 223 is not inserted into the rib receiving hole 217). .. Since the back guide member 22 is made of resin, it is elastically deformed, and the central portion in the vertical direction thereof is slightly separated from the main member 21 so as to be in a state of being bent like a bow.

Here, the rear guide member 22 is pushed into the main member 21 side by inserting the convex portions of the upper and lower hook receiving portions into the concave portions of the upper and lower hook portions (that is, applying a load downward). Then, the rib portion 223 is inserted into the rib receiving hole 217, and as shown in FIG. 8C, the main member 21 and the back guide member 22 are in a state of complete contact. In this state, the upper end of the rib portion 223 is locked at the upper end of the rib receiving hole 217, so that the engagement between the upper and lower hook portions and the hook receiving portion cannot be released. As a result, the main member 21 and the back guide member 22 are so-called fit-and-kill, and are irremovably coupled.

By providing the wiring box 20 having the above configuration, it is possible to effectively drain the rainwater that has entered the wiring box 20, and provide a power conditioner 10 that can be easily assembled at the installation site. can do.

In the present embodiment, the wiring box 20 corresponds to the lower housing of the present invention, the main member 21 corresponds to the first member of the present invention, the back guide member 22 corresponds to the second member, and the front lid. 23 corresponds to the third member of the present invention.

<Modification example>
The above-described embodiment is merely an example of the present invention, and the present invention is not limited to the above-mentioned specific embodiment. The present invention can be variously modified and combined within the scope of its technical idea. For example, in the above embodiment, the wiring box 20 is configured to include the front lid 23 as a separate member, but a configuration corresponding to the front lid may be integrally formed.

Further, the back side drainage hole 211 and the front side drainage hole 212 each have an elliptical shape, but the shape is not limited to the elliptical shape as long as it has a shape having a longitudinal direction. Further, the drainage hole 213 for left / right identification has a perfect circular shape, but the shape is not limited to this as long as the rear wall opening 25 is formed in such a manner that the left / right can be identified. For example, the same shape as the other drainage holes may be provided, and more drainage holes may be provided in the vicinity of the back wall opening 25 on either the left or right side than the other, and this may be used as the left and right identification drainage holes.

Further, the wiring box 20 may be configured so that the bottom surface opening 214 is not provided, or conversely, the wiring is drawn from only the bottom surface without providing the back wall opening 25. Further, the shape of the rib portion 223 is not limited to the L-shape, but may be a T-shape, an I-shape, or a substantially U-shape.

Further, although the power conditioner used in the photovoltaic power generation system has been described above, it may be applied to the power conditioner used in the power storage system alone and the power conditioner used in the hybrid system. It may also be applied to the peripheral device.

<Additional Notes>
One aspect of the present invention is a housing of an electric power device (10) installed on the wall surface of a building, which is attached to a main body (11) into which a plurality of wirings (4) are drawn from the bottom surface side and the bottom of the main body. It has a lower housing (20) that is attached to it.
The lower housing is
A first member having an opening (24) on the upper surface side which is the bottom side of the main body in a state of being attached to the bottom of the main body and a back opening (25) which receives the wiring on the back surface side which is the wall surface side. (21) is at least provided,
The bottom surface near the boundary between the back opening of the first member and the wall portion (21a) forming the back of the first member has a shape having a longitudinal direction in the left-right direction toward the front of the power conditioner. The back side drain hole (211) is provided.
It is a housing for electric power equipment, which is characterized by this.

10 ... Power conditioner 11 ... Main body 13 ... Front cover 20 ... Wiring box 21 ... Main member 211 ... Back side drain hole 212 ... Front side drain hole 213 ... Left / right identification drainage hole 214 ... Bottom opening 215 ... Lower hook receiving part 216 ... Upper hook receiving part 217 ... Rib receiving hole 22 ... Back cover member 221 ... Lower hook Part 222 ... Upper hook part 223 ... Rib part 224 ... Front plate-shaped part 23 ... Front lid 24 ... Top opening 25 ... Back wall opening 26 ... Guide cover 3 ...・ Conduit 4 ・ ・ ・ Wiring

Claims (9)

It is a housing of an electric power device installed on the wall surface of a building, and has a main body in which a plurality of wirings are drawn from the bottom side and a lower housing attached to the bottom of the main body.
The lower housing is
It is provided with at least a first member having a back opening for receiving the wiring on the back side, which is the wall surface side, while opening to the upper surface side, which is the bottom side of the main body, in a state of being attached to the bottom of the main body.
A back surface drainage hole having a shape having a longitudinal direction is provided on the bottom surface near the boundary between the back surface opening of the first member and the wall portion forming the back surface of the first member.
The housing of electric power equipment, which is characterized by this. The rear drainage hole has a longitudinal direction in the left-right direction toward the wall surface.
The housing of the electric power device according to claim 1, characterized in that. The electric power device is connected to a conduit in which the wiring is housed at the rear opening.
The lower housing includes a second member that is coupled to the first member at the back opening and prevents the connection portion with the electric wire duct from being exposed.
The back surface side drainage hole is provided on the bottom surface of the first member in the vicinity of the coupling structure with the second member.
The housing of the electric power device according to claim 1 or 2, characterized in that. The first member is provided with two back openings symmetrically toward the wall surface, and the back side drain holes are provided for each of the two back openings.
In the vicinity of any of the two back openings, left and right identification drain holes are further provided in such a manner that the left and right sides of the back opening can be distinguished.
The housing of the electric power device according to any one of claims 1 to 3, wherein the housing is characterized by the above. The first member has an opening on the front side facing the back side.
The lower housing further includes a third member that is coupled to the first member in the vicinity of both side surfaces of the first member in a manner that covers the opening on the front side.
A front drainage hole having a shape in the longitudinal direction is further provided on the bottom surface of the first member in the vicinity of the boundary between the first member and the third member and in the vicinity of the coupling structure between the first member and the third member. ing,
The housing of the electric power device according to any one of claims 1 to 4, characterized in that. The front drainage hole has a longitudinal direction in the depth direction between the front side and the back side.
5. The housing of the electric power device according to claim 5. Each drainage hole has an oblong shape.
The housing of the electric power device according to any one of claims 1 to 6, characterized in that. The first member further includes a bottom opening on the bottom side for receiving wiring connected to the power device.
The housing of the electric power device according to any one of claims 1 to 7, wherein the housing is characterized by the above. It is a housing of an electric power device installed on the wall surface of a building, and has a main body in which a plurality of wirings are drawn from the bottom side and a lower housing attached to the bottom of the main body.
The lower housing is
A fourth member that opens an upper surface side that is the bottom side of the main body and a front side that faces the wall surface side when attached to the bottom of the main body.
A fifth member that is coupled to the fourth member in the vicinity of both side surfaces of the fourth member is provided so as to cover the opening on the front side of the fourth member.
A front drainage hole having a shape having a longitudinal direction is provided on the bottom surface of the fourth member near the boundary between the fourth member and the fifth member and near the coupling structure between the fourth member and the fifth member. ing,
The housing of electric power equipment, which is characterized by this.

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