Power conditioner

Abstract

To provide a power conditioner that can maintain a good appearance and facilitates wire connection work.SOLUTION: A lower housing (20) can be attached to a bottom face of a body (11) in which a plurality of wires (4) are drawn in from the bottom face. The lower housing (20) includes an opening that opens from a top face to a back face, and the opening includes a top face opening (28) through which the plurality of wires (4) pass from the inside to the body (11), and a back face opening (22) through which at least part of the plurality of wires (4) pass from the outside to the inside of the back face.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a power conditioner used in a photovoltaic power generation system. [Background technology]

[0002] In a conventional solar power generation system, the DC power generated by the solar cell is converted to an appropriate DC power and / or an appropriate AC power by a power conditioning system. The solar cells are converted into solar power. The converted power is output to a switchboard or to an external power system. For this reason, inside the power conditioner housing, wiring for inputting power from the solar cells and wiring for outputting power to an external device are drawn and connected to various terminals. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2017-099161 A (Published June 1, 2017) Summary of the Invention [Problem to be solved by the invention]

[0004] The wiring may be drawn in from an opening on the back of the housing, or from an opening on the bottom of the housing (see, for example, Patent Document 1). The former has the advantage of maintaining the aesthetic appearance since the wiring is concealed reliably compared to the latter. On the other hand, the latter has the advantage of making it easier to connect the wiring to various connection terminals (wiring connection work) compared to the former.

[0005] One aspect of the present disclosure has been made to solve the above-mentioned problems, and an object of the present disclosure is to provide a power conditioner that can maintain an aesthetic appearance and facilitates wiring connection work. [Means for solving the problem]

[0006] In order to solve the above problems, a power conditioner according to one embodiment of the present disclosure comprises a main body into which multiple wirings are drawn from the bottom surface, and a lower housing that can be attached to the bottom surface of the main body, the lower housing having an opening that opens from the top surface to the back surface, the opening including a top opening through which the multiple wirings pass from the inside to the main body, and a back opening through which at least some of the multiple wirings pass from the outside on the back side to the inside.

[0007] According to the above configuration, the lower housing has an opening between the top opening and the rear opening. Therefore, after wiring from the outside of the rear side is pulled in from the bottom surface of the main body and wiring connection work is performed inside the main body, the lower housing can be attached to the main body and the wiring can be stored in the lower housing. As a result, the wiring connection work can be easily performed. In addition, the wiring pulled in from the outside of the rear side to the main body is hidden by the lower housing, so that the aesthetic appearance can be maintained.

[0008] The power conditioner may include a temporary fastening means for temporarily attaching the lower housing to the main body, and a fastening means for fastening the lower housing to the main body. An example of the temporary fastening means is a mechanism that is attached by moving the lower housing in a certain direction relative to the main body and can be removed by moving the lower housing in the opposite direction. Another example is an adhesive tape that attaches the lower housing to the main body. Examples of fastening by fastening means include fastening with screws, riveting, etc. Examples include:

[0009] In the above case, when the lower housing is attached to the main body, it can be temporarily fixed using a temporary fixing means and then fixed using a fixing means, thereby improving the efficiency of the attachment work. Note that it is preferable that the temporary fixing means functions as a positioning means for determining a fixing position for fixing the lower housing to the main body. In this case, the efficiency of the attachment work is further improved.

[0010] In the power conditioner, the lower housing preferably has a drain hole on the bottom surface for draining liquid that has entered the inside to the outside. In this case, even if liquid such as rainwater enters the inside, the liquid can be drained to the outside. As a result, the wiring in the lower housing can be prevented from being submerged in the liquid.

[0011] The wiring from the outside on the rear side is usually routed through an opening formed in the wall, the location of which varies depending on the construction of the wall.

[0012] In the power conditioner, the opening of the lower housing may include a plurality of the rear openings, and the lower housing may include at least one removable blocking member that blocks each of the rear openings. In this case, one of the rear openings of the lower housing can be made to correspond to the position of various openings on the wall, and the remaining rear openings can be blocked by a blocking member. As a result, the power conditioner can be attached to various positions on the wall.

[0013] In the power conditioner, the lower housing may further include a positioning hole in a bottom portion for attaching the blocking member to a predetermined position. In this case, the blocking member can be attached to a predetermined position by the positioning hole. Furthermore, since the positioning hole is a through hole provided in the bottom portion of the lower housing, the positioning hole where the blocking member is not attached to the lower housing can function as the above-mentioned water drainage hole.

[0014] In the power conditioner, the main body may be made of metal, and the lower housing may be made of plastic. In this case, the electric circuit inside the main body can be protected from external electromagnetic waves. In addition, since the lower housing can be manufactured in various shapes, for example, the temporary fixing means, the water drainage holes, the positioning holes, etc. can be easily formed in the lower housing. Furthermore, the lower housing can be formed in a shape that makes it easy to fix with the fixing means. The main body may be a plastic housing with a metal shielding member provided on the inner or outer surface. Even in this case, the electric circuit can be protected from external electromagnetic waves.

[0015] According to the present disclosure, the space required for wiring connection work in the lower part of the main body can be narrowed, which makes it possible to reduce the size of the main body and to improve the strength of the lower part of the main body.

[0016] Therefore, in the power conditioner, the main body may be provided with gripping parts on the top and bottom surfaces of the main body for carrying the main body. In this case, it is not necessary to provide gripping parts on the sides of the main body, and the width of the main body can be narrowed.

[0017] In the power conditioner, a conduit that houses and protects the wiring can be attached to the bottom surface of the main body, the opening of the lower housing further includes a bottom opening through which the conduit passes, and the lower housing may be separable into the front and rear so as to cut the bottom opening. In this case, the wiring in the conduit attached to the bottom surface of the main body can be pulled into the main body. Therefore, the wiring concealed by the conduit and the lower housing Furthermore, even if the conduit is attached to the main body, the lower housing can be easily attached to the main body by first attaching the rear part of the lower housing to the main body and then attaching the front part of the lower housing to the main body. Effect of the Invention

[0018] According to one aspect of the present disclosure, it is possible to maintain the aesthetic appearance and facilitate wiring connection work. [Brief description of the drawings]

[0019] [Figure 1] FIG. 1A shows the configuration of a power conditioner in an embodiment of the present disclosure, being a front view showing the configuration of the power conditioner mounted on a wall surface with the front cover removed, and FIG. 1B is an oblique view looking up at the power conditioner from below. [Diagram 2] FIG. 2 is a perspective view showing a configuration of the power conditioner. [Diagram 3] (a) is a front view showing the configuration of the power conditioner, (b) is a side view thereof, (c) is a bottom view thereof, (d) is a cross-sectional view of a portion surrounded by a dashed dotted line α in (b), and (e) is a cross-sectional view of a portion surrounded by a dashed dotted line β in (b). [Figure 4] FIG. 2 is an exploded perspective view showing the configuration of the power conditioner with the front cover removed, with the front side facing up. [Diagram 5] FIG. 1A is an oblique view showing the configuration of the lower housing of the power conditioner, FIG. 1B is a front view thereof, FIG. 1C is a side view thereof, FIG. 1D is a cross-sectional view taken along line AA of FIG. 1B, and FIG. 1E is a cross-sectional view showing an enlarged view of a drainage hole provided on the bottom surface of the lower housing. [Figure 6] 1A is an oblique view showing the state in which the sliding lid has begun to be placed on one of the rear openings on both sides of the rear surface of the lower housing of the power conditioner, and FIG. 1B is an oblique view showing the state in which the sliding lid has been placed. [Figure 7] 4 is a perspective view showing a procedure for mounting the power conditioner on a wall surface. FIG. [Figure 8] 5(a), (b), (c), and (d) are cross-sectional views showing a procedure for attaching the lower housing to the bottom surface of the power conditioner main body. [Figure 9]FIG. 10 is a front view showing the configuration of a modified example of the power conditioner, the power conditioner being attached to a wall surface with the front cover removed. [Figure 10] FIG. 11 is an exploded perspective view showing the configuration of a lower housing in a power conditioner of a modified example, with the front side facing up. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] Hereinafter, an embodiment according to one aspect of the present disclosure (hereinafter also referred to as "the present embodiment") will be described with reference to the drawings.

[0021] (Examples) First, an example of a situation to which the present disclosure is applied will be described with reference to Fig. 1. Fig. 1(a) shows the configuration of a power conditioner 10 according to one embodiment of the present disclosure, and is a front view showing the configuration of the power conditioner 10 attached to a wall surface with the front cover 13 removed. Fig. 1(b) is a perspective view of the power conditioner 10 attached to a wall surface with the front cover 13 removed, viewed from below. Note that Fig. 1(a) shows some components cut away.

[0022] As shown in FIG. 1, the power conditioner 10 includes a main body 11 into which a plurality of wires 4 are led in from the bottom surface, and a lower housing 20 that can be attached to the bottom surface of the main body 11. The lower housing 20 includes an opening that opens from the top surface to the back surface. The opening includes a top opening 28 through which the plurality of wires 4 pass through the main body 11 from the inside, and a bottom opening 29 through which at least some of the plurality of wires 4 pass from the outside on the back side. It has a rear wall opening 22 (rear opening) leading to the inside.

[0023] According to the above configuration, the lower housing 20 is also open between the top opening 28 and the rear wall opening 22. Therefore, after the wiring 4 from the outside on the rear side is pulled in from the bottom surface of the main body 11 and the wiring connection work is performed inside the main body 11, the lower housing 20 can be attached to the main body 11 and the wiring 4 can be stored in the lower housing 20. As a result, the wiring connection work can be easily performed. In addition, the wiring 4 pulled into the main body 11 from the outside on the rear side is hidden by the lower housing 20, so that the aesthetic appearance can be maintained.

[0024] (Configuration example) The following describes an embodiment of the present disclosure with reference to FIGS. 1 to 8.

[0025] (Power conditioner configuration) The power conditioner of the present embodiment is a power conditioning system used in a grid-connected system that utilizes photovoltaic power generation.

[0026] A grid-connected system is composed of a number of solar cells installed on the roof of a house, and a power conditioner that converts the DC power generated by each solar cell into AC power. This grid-connected system supplies AC power to a load connected between the power conditioner and a commercial power system by switching between grid-connected operation and stand-alone operation. Here, grid-connected operation refers to operation of the power conditioner connected to the commercial power system. Also, stand-alone operation refers to operation of only the power conditioner, for example, when the commercial power system is experiencing a power outage.

[0027] Incidentally, when a power conditioner is installed on a wall, the wiring 4 exposed from the wall may be pulled in from the bottom 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 this case, the wiring 4 pulled into the power conditioner body is exposed, which is undesirable from the viewpoints of protecting the wiring 4 and aesthetics. The power conditioner of the present embodiment has been devised to solve these problems.

[0028] The configuration of the power conditioner 10 of this embodiment will be described with reference to Fig. 2 and (a), (b), (c), (d), and (e) of Fig. 3. Fig. 1 (a) shows the configuration of the power conditioner 10, and is a front view showing the configuration of the power conditioner 10 attached to a wall surface with the front cover 13 removed.

[0029] FIG. 2 is a perspective view showing the configuration of the power conditioner 10. FIG. 3(a) is a front view showing the configuration of the power conditioner 10. FIG. 3(b) is a front view showing the configuration of the power conditioner 10. FIG. 3(c) is a bottom view showing the configuration of the power conditioner 10. FIG. 3(d) is a cross-sectional view of a portion surrounded by a dashed line α in FIG. 3(b). FIG. 3(e) is a cross-sectional view of a portion surrounded by a dashed line β in FIG. 3(b). In this specification, the front side may be referred to as the front side, and the back side may be referred to as the rear side.

[0030] As shown in Figures 2 and (a), (b), (c), (d), and (e) of Figure 3, the power conditioner 10 comprises a substantially rectangular main body 11, a lower housing 20 attached to the front half of the lower side of the main body 11, and a concealed duct 3 provided below the main body 11 and on the rear right side of the lower housing 20.

[0031] The power conditioner 10 of this embodiment has a front cover 13 on the front side. The face cover 13 can be attached to the main body 11 from the front side with screws.

[0032] In the power conditioner 10 of this embodiment, the front top surface of the main body 11 extends upward and then rearward. The upper part of the front cover 13 extends rearward and then downward. This forms a space in the front top surface of the power conditioner 10 into which an operator can insert his / her fingers. Meanwhile, the front bottom surface of the main body 11 extends downward and then rearward. The lower part of the front cover 13 extends rearward. This forms a space in the front bottom surface of the power conditioner 10 into which an operator can insert his / her fingers.

[0033] 1(a) and 1(b), the wires 4 extend simply from the bottom surface of the main body 11 to the various connection terminals. This makes it possible to reduce the space required for wire connection work in the lower part of the main body 11. This makes it possible to reduce the size of the main body 11 and to improve the strength of the lower part of the main body 11.

[0034] Therefore, in power conditioner 10 of the present embodiment, the portions forming the spaces on the front side of the upper surface and the front side of the lower surface respectively serve as gripping portions 50 and 51 for transporting main body 11. In this case, it is no longer necessary to provide gripping portions on the side surfaces of main body 11, and the width of main body 11 can be narrowed.

[0035] 4 is an exploded perspective view showing the configuration of the power conditioner 10 with the front cover 13 removed, with the front side facing up. As shown in FIG. 4, when the front cover 13 is removed from the main body 11, for example, the input side switch 15, the output side terminal block 16, and other display units are exposed. A plurality of main body wiring holes 14 through which wiring 4 from the outside passes are provided on the main body bottom portion 11a of the main body 11. Therefore, the wiring 4 drawn into the main body 11 from the outside through the main body wiring holes 14 is connected to various connection terminals of the input side switch 15 and the output side terminal block 16.

[0036] Protrusions 12, 12 protruding from the sides are provided on both sides of the upper portion of the main body 11. As shown in Fig. 7 described later, these protrusions 12, 12 are hooked onto hook portions 1c of a mounting base plate 1 fixed to a wall surface (not shown), so that the main body 11 can be mounted on the mounting base plate 1.

[0037] In this embodiment, the lower housing 20 is provided to hide the wiring 4 that is drawn from the outside into the main body 11 through the main body wiring hole 14. The lower housing 20 is made of plastic and manufactured by injection molding or the like. Therefore, the lower housing 20 can be manufactured in various shapes as shown in FIG. 5 described later, so that, for example, the eaves opening 24a, the locking portion 27, the water drainage hole 25, the positioning hole 29, the rear pipe portion 31, and the like described later can be easily formed in the lower housing 20. Note that the main body 11 is made of metal from the viewpoint of blocking electromagnetic waves from the outside and protecting the electric circuit provided inside, but is not limited thereto. For example, the main body 11 may be a plastic housing provided with a metal shielding member on the inner or outer surface. Even in this case, the shielding member can block electromagnetic waves from the outside and protect the electric circuit.

[0038] FIG. 5(a) is a perspective view showing the configuration of the lower housing 20, FIG. 5(b) is a front view thereof, FIG. 5(c) is a side view thereof, FIG. 5(d) is a cross-sectional view taken along line AA of FIG. 5(b), and FIG. 5(e) is a cross-sectional view showing an enlarged view of the drainage hole 25 provided on the bottom surface of the lower housing 20. FIG. 6(a) is a perspective view showing a state in which the sliding lid 23 (closing member) has begun to be placed on one of the rear wall openings 22 present on both sides of the rear surface of the lower housing 20 of the power conditioner 10. FIG. 6(b) shows a state in which the sliding lid 23 has been placed. FIG.

[0039] As shown in (a)(b)(c)(d)(e) of Figure 5, the lower housing 20 has a box-like shape with a bottom, with an upper surface forming an upper surface opening 28, and two rear wall openings 22·22 formed on the rear side.

[0040] The two rear wall openings 22·22 are used for drawing the wiring 4 into the lower housing 20 through one of the rear wall openings 22 via the concealed duct 3. In this case, the other rear wall opening 22 needs to be closed because rainwater or the like will enter if it is left open. For this reason, as shown in (a) and (b) of FIG. 6, the other rear wall opening 22 is covered with a removable slide cover 23. That is, the two rear wall openings 22·22 are of the same size so that the slide cover 23 can slide regardless of whether it is inserted into either of the rear wall openings 22·22. For this reason, it is possible to accommodate whether the concealed duct 3 is present on the left or right side depending on the position at which the wiring 4 is exposed from the wall surface. As a result, the power conditioner 10 can be attached to various positions on the wall surface.

[0041] 5(d) and (e), in the present embodiment, lower housing 20 has drainage hole 25 formed in the bottom, and sloped portion 26 formed around drainage hole 25. As a result, even if rainwater (liquid) enters lower housing 20, the rainwater is discharged to the outside through drainage hole 25.

[0042] 5(a), the top opening 28 of the lower housing 20 has a visor portion 24 formed on the back side. The visor portion 24 has a visor opening 24a (temporary fastening means) for passing a knurled screw 17 (temporary fastening means) described later when attaching the lower housing 20 to the main body bottom portion 11a of the main body 11. The visor opening 24a is opened wide at the front side of the visor portion 24 so that the knurled screw 17 can be inserted with ease, while the rear side of the visor portion 24 is opened slightly wider than the width of the thread of the knurled screw 17 so that the knurled screw 17 can be fixed.

[0043] The concealing duct 3 is provided to conceal the wiring 4 exposed from a wall surface (not shown). That is, as shown in FIG. 4, the main body 11 is usually provided with various electric devices, connection terminals, etc. on the front side, and with a fan, a heat sink, etc. on the rear side. Therefore, the lower housing 20 is provided at the front half position under the power conditioner 10. Therefore, there is a distance between the wall surface (not shown) and the rear wall opening 22 of the lower housing 20, and the wiring 4 is exposed between the wall surface (not shown) and the rear wall opening 22 of the lower housing 20. Therefore, in this embodiment, the concealing duct 3 is provided to conceal the wiring 4 exposed between the wall surface (not shown) and the rear wall opening 22 of the lower housing 20.

[0044] 4, the concealed duct 3 has a duct rear opening 3a on the rear side, a duct front opening 3b on the front side, and a duct bottom opening 3c on the bottom side. The duct rear opening 3a and the duct front opening 3b are openings through which the wiring 4 passes. The duct bottom opening 3c is for facilitating the installation work of the wiring 4 in the concealed duct 3, and is adapted to be covered with a duct cover 3d.

[0045] Furthermore, the duct bottom opening 3c is also for attaching a new concealed duct (not shown). By making the duct cover 3d removable from the duct bottom opening 3c, it becomes easy to install the wiring 4 passing through the new concealed duct in the concealed duct 3 and to attach the new concealed duct to the duct bottom opening 3c.

[0046] (How to mount the power conditioner on the wall) A method of mounting the power conditioner 10 of this embodiment on a wall surface will be described with reference to Fig. 7. Fig. 7 is a perspective view showing a procedure for mounting the power conditioner 10 on a wall surface.

[0047] As shown in Fig. 7, when the power conditioner 10 of this embodiment is mounted on a wall surface (not shown), the mounting base plate 1 is first mounted on the wall surface (not shown) with the screw 1a. Although only one screw 1a is shown in Fig. 7, the screw 1a is actually present in a plurality of places.

[0048] After the mounting base plate 1 is attached to the wall surface, the concealed duct 3 is attached with a screw 3e, for example, to the right end of the bent lower end plate 1b of the mounting base plate 1. After that, the gap between the wall surface side edge of the duct rear opening 3a of the concealed duct 3 and the wall surface (not shown) is caulked (sealed with a sealant) from the outside.

[0049] Next, the main body 11 of the power conditioner 10 is attached to the mounting base plate 1 .

[0050] When attaching the main body 11 to the mounting base plate 1, first, the protrusions 12, 12 protruding from both the left and right side surfaces on the upper side of the main body 11 are hooked onto the hooks 1c, 1c formed on the mounting base plate 1. At this time, the main body bottom surface 11a of the main body 11 is placed on the folded lower end plate 1b of the mounting base plate 1. Therefore, a screw 1d is inserted from below the main body 11 through the main body bottom surface 11a of the main body 11 and screwed to the folded lower end plate 1b of the mounting base plate 1. This allows the main body 11 to be fixed to the mounting base plate 1.

[0051] Next, in this state, wiring work (wire connection work) is performed. The wiring work is performed with the front cover 13 of the main body 11 removed. The front cover 13 can be removed by removing the screws 13a. During the wiring work, a plurality of wires 4 (not shown) that are passed through a wiring opening (not shown) formed in a wall (not shown) and a duct rear opening 3a of the concealed duct 3 are connected to various connection terminals such as an input side switch 15 and an output side terminal block 16 provided on the main body 11 through a plurality of main body wiring holes 14 provided on the main body bottom portion 11a of the main body 11 as shown in FIG. 4.

[0052] It is preferable that the wiring 4 from the concealed duct 3 to the main body 11 is located higher than the bottom surface of the concealed duct 3. This allows the wiring 4 from the concealed duct 3 to the main body 11 to be securely accommodated inside the lower housing 20.

[0053] After the wiring work is completed, the gaps between the multiple wires 4 that have passed through the main body wiring hole 14 are filled with putty (sealed with a sealant). This makes it possible to prevent insects and the like from entering the main body 11.

[0054] Next, the lower housing 20 is attached to the main body bottom surface portion 11a of the main body 11. Here, the lower housing rear wall 21 of the lower housing 20 has two rear wall openings 22, 22 on the left and right sides, as shown in (a), (b), (c), and (d) of FIG. 5. For this reason, the rear wall opening 22 on the side where the concealed duct 3 does not exist needs to be closed. Therefore, as shown in (a) and (b) of FIG. 6, the rear wall opening 22 on the side where the concealed duct 3 does not exist is closed with a slide lid 23. In this embodiment, when the power conditioner 10 is viewed from the front side, the concealed duct 3 exists on the right side, so the rear wall opening 22 on the left side is closed.

[0055] When closing the left rear wall opening 22 of the lower housing 20, as shown in FIG. 6(a), the slide grooves 23a and 23a provided on both side ends of the slide cover 23 are inserted into the edges of the rear wall opening 22 of the lower housing rear wall 21, and the slide cover 23 is slid downward. As a result, the left rear wall opening 22 of the lower housing 20 can be closed with the slide cover 23, as shown in FIG. 6(b).

[0056] Furthermore, protrusions 23b provided on both sides of the lower end of the sliding lid 23 fit into positioning holes 29 provided in the bottom surface of the lower housing 20. This allows the sliding lid 23 to be attached in a predetermined position and prevented from moving back and forth or side to side, thereby ensuring that the left rear wall opening 22 of the lower housing 20 is closed reliably.

[0057] 6(a), the positioning holes 29·29 are provided not only near the left rear wall opening 22 but also near the right rear wall opening 22. The positioning holes 29·29 provided near the right rear wall opening 22, i.e., the positioning holes 29·29 provided near the rear wall opening 22 that is not closed by the sliding lid 23, function, like the water drainage hole 25, to drain rainwater and the like that has entered the lower housing 20 to the outside.

[0058] Next, the lower housing 20 is attached to the main body bottom surface portion 11a of the main body 11. (a), (b), (c), and (d) of Figure 8 are cross-sectional views showing a procedure for attaching the lower housing 20 to the main body bottom surface portion 11a of the main body 11.

[0059] As shown in (a) of Fig. 8, first, the knurled screw 17 is screwed into the knurled screw hole formed on the lower rear side of the main body bottom portion 11a of the main body 11. Next, the lower housing 20 is lifted up, and the knurled screw 17 is passed from above through the eaves opening 24a formed in the eaves portion 24 of the lower housing 20, and the upper surface of the eaves portion 24 is brought into contact with the lower surface of the main body bottom portion 11a of the main body 11, as shown in (b) of Fig. 8.

[0060] Next, as shown in Fig. 8(c), the lower housing 20 is slid forward along the main body bottom surface portion 11a. As a result, as shown in Fig. 8(d), the locking portion 27 (temporary fastening means) of the lower housing 20 is inserted into and locked to the flange 11b provided on the main body bottom surface portion 11a of the main body 11. Also, the knurled screw 17 is locked to the rear side of the eaves opening 24a. As a result, the lower housing 20 is temporarily fixed (temporarily fastened) to the main body bottom surface portion 11a of the main body 11.

[0061] Next, as shown in Fig. 4, the lower housing 20 is fixed to the main body 11 by screwing. In this embodiment, the front corners of the lower housing 20 are rounded, and front edge portions 30·30 are provided on the upper surfaces of the front corners. The lower housing 20 also has rear pipe portions 31·31 between the eaves portion 24 and the rear wall openings 22·22. Four screws 32 (fixing means) are then passed from below the lower housing 20 through the front edge portions 30·30 and the rear pipe portions 31·31 of the lower housing 20, and screwed (fixed) to the main body bottom portion 11a of the main body 11.

[0062] Therefore, when attaching lower housing 20 to main body 11, it is temporarily fixed and then fixed with screws, improving the efficiency of the attachment work. Furthermore, knurled screw 17, eaves opening 24a, and locking portion 27 also function as positioning means for determining the fixing position of lower housing 20 to main body 11, further improving the efficiency of the attachment work.

[0063] In this embodiment, the rear tube parts 31·31 are tapered, narrowing from the bottom to the top, which makes it easier to insert the screws 32 from the bottom to the top of the rear tube parts 31, thereby improving work efficiency.

[0064] Next, the gap between the duct rear opening 3a of the concealed duct 3 and the wall surface (not shown) is caulked from the inside of the concealed duct 3. Thereafter, a duct cover 3d is screwed to the duct bottom opening 3c of the concealed duct 3.

[0065] 1(b), it is possible to conceal the wiring 4 that is led from the wall surface into the main body 11. Finally, by attaching the front cover 13 to the main body 11, the installation work of the power conditioner 10 is completed.

[0066] (Modification) Fig. 9 shows the configuration of a modified power conditioner, and is a front view showing the configuration of a power conditioner 10a attached to a wall surface with the front cover 13 removed. Fig. 10 is an exploded perspective view showing the configuration of a lower housing 20a in the modified power conditioner 10a with the front side facing up.

[0067] 9, in this modification, a conduit 40 that houses and protects one or more wires 4 can be attached to the main body wiring hole 14 of the main body 11. Also, a conduit hole 33 (bottom opening) through which the conduit 40 from the outside passes is provided in the bottom portion of the lower housing 20a in correspondence with the main body wiring hole 14.

[0068] This modified example can also accommodate a case where some of the wiring 4 is drawn into the main body 11 through the conduit 40, while the remaining wiring 4 is drawn into the main body 11 from the wall through the rear wall opening 22, the top opening 28, and the main body wiring hole 14. Therefore, the wiring 4 can be concealed using the conduit 40, and the wiring 4 that does not use the conduit 40 can be concealed using the lower housing 20. It is also possible to accommodate a case where all of the wiring 4 is drawn into the main body 11 through the conduit 40.

[0069] 10, in this modification, the lower housing 20a can be separated into front and rear portions so as to cut the conduit holes 33. Specifically, the lower housing 20a has a lower housing front portion 34 and a lower housing rear portion 35. The lower housing front portion 34 has a front recess 34a that constitutes a portion of each conduit hole 33, and the lower housing rear portion 35 has a rear recess 35a that constitutes the remainder of each conduit hole 33.

[0070] When attaching the lower housing 20a having the above-mentioned configuration to the main body 11, first, the lower housing rear part 35 is temporarily fixed as shown in (a), (b), (c), and (d) of FIG. 8, and then screwed in with two screws 32. Next, the electric conduit 40 connected to the main body wiring hole 14 is abutted against the rear recess 35a of the lower housing rear part 35. Next, the lower housing front part 34 is temporarily fixed as shown in (a), (b), (c), and (d) of FIG. 8, and then screwed in with two screws 32. Therefore, even when the electric conduit 40 is connected to the main body wiring hole 14 of the main body 11, the lower housing 20a including the lower housing front part 34 and the lower housing rear part 35 can be easily attached to the main body 11.

[0071] It should be noted that the present disclosure is not limited to the above-described embodiments, and various modifications are possible within the scope of the claims, and embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of the present disclosure. Furthermore, new technical features can be formed by combining the technical means disclosed in each embodiment. [Explanation of symbols]

[0072] 1 Mounting base plate 1b Bent lower end plate 1c Hook part 3. Concealed Duct 3a Duct rear opening 3b Duct front opening 3c Duct bottom opening 3d duct cover 4. Wiring 10, 10a Power Conditioner 11 Main unit 11a Bottom of the main unit 11b Flange 12 Protrusion 13 Front cover 14 Main body wiring hole 15 Input side switch 16 Output terminal block 17 Knurled screw (temporary fastening means) 20, 20a Lower housing 21 Lower housing rear wall 22 Rear wall opening (opening, rear opening) 23 Slide cover (closing member) 23a Slide groove 23b Projection piece 24 Eaves 24a Eaves opening (temporary fastening means) 25 Drain hole 26 Slope 27 Locking portion (temporary fastening means) 28 Top opening (opening) 29 Positioning hole (drain hole) 30 Front edge 31 Rear pipe section 32 Screw (fixing means) 33 Conduit hole (bottom opening) 34 Lower housing front 34a Front recess 35 Rear of lower housing 35a Rear recess 40 Conduit 50, 51 Gripping part

Claims

1. A power conditioner that converts input DC power into a predetermined DC power or AC power and outputs the converted power, The rear side of the power conditioner is attached to a wall, The power conditioner has a shape extending upward on the front side of the upper surface and further extending rearward, A power conditioner, wherein the shape extending upward and further rearward is a space or gap into which a finger is inserted when mounting the power conditioner on a wall surface.

2. The power conditioner according to claim 1, The power conditioner has a shape extending downward to the front side of the lower surface and further extending rearward, A power conditioner, wherein the shape extending downward and further rearward is a space or gap into which a finger can be inserted when mounting the power conditioner on a wall surface.

3. The power conditioner according to claim 1 or 2, The power conditioner has a shape that extends upward on the front side of the upper surface, further extends rearward, and further extends downward, A power conditioner, characterized in that the shape extending upward, further rearward, and further downward forms a space or gap for inserting a finger when mounting the power conditioner on a wall surface.

4. The power conditioner according to any one of claims 1 to 3, The power conditioner includes a main body having an upper surface, a lower surface, a side surface, a front side, and a rear side when attached to a wall surface, A power conditioner characterized in that a front cover is attached to the front side of the main body and a heat sink is provided on the rear side.

5. A method for mounting a power conditioner to a wall surface, comprising: mounting the power conditioner according to any one of claims 1 to 4 to a wall surface by a mounting member that can be mounted to the wall surface, The mounting member and the power conditioner have engagement portions that engage with each other, a first step in which the mounting member is attached to a wall surface; A second step in which the space or gap formed on the front side of the upper surface of the power conditioner is grasped by an operator and carried to the vicinity of the mounting member; A third step in which an engagement portion of the power conditioner and an engagement portion of the mounting member are engaged with each other to mount the power conditioner on a wall surface; A method for mounting a power conditioner to a wall surface, comprising:

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