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 Art

[0002] In a conventional photovoltaic power generation system, DC power generated by a solar cell is converted into appropriate DC power and / or appropriate AC power by a power conditioning system. The converted power is output to a distribution board or output to an external power grid. For this reason, inside the casing of the power conditioner, wiring for inputting power from the solar cell and wiring for outputting power to an external device are drawn in and connected to various terminals.

Prior Art Literature

Patent Literature

[0003]

Patent Literature 1

Summary of the Invention

Problem to be Solved by the Invention

[0004] There are two cases where the above wiring is drawn in: one is from an opening on the rear surface of the casing, and the other is from an opening on the bottom surface of the casing (see, for example, Patent Literature 1). Compared with the latter case, the former case has the advantage that the aesthetic appearance can be maintained because the wiring is reliably concealed. On the other hand, compared with the former case, the latter case has the advantage that the work of connecting the above wiring to various connection terminals (wiring connection work) is easy.

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

Means for Solving the Problem

[0006] To solve the above problems, a power conditioner according to one aspect of the present disclosure comprises a main body through which a plurality of wires are drawn from the bottom, and a lower housing that can be attached to the bottom of the main body, wherein the lower housing has an opening that extends from the top to the rear, and the opening comprises a top opening through which the plurality of wires pass from the inside to the main body, and a rear opening through which at least a portion of the plurality of wires pass from the outside on the rear side to the inside.

[0007] According to the above configuration, there is also an opening between the top opening and the rear opening of the lower housing. Therefore, wiring from the outside on the rear side can be pulled in from the bottom of the main unit, and after wiring connection work is done inside the main unit, the lower housing can be attached to the main unit and the wiring can be housed in the lower housing. As a result, the wiring connection work can be performed easily. In addition, since the wiring pulled into the main unit from the outside on the rear side is concealed by the lower housing, the aesthetic appearance can be maintained.

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

[0009] In the above case, when attaching the lower housing to the main body, it can be temporarily fixed using temporary fixing means and then fixed using fixing means, thereby improving the efficiency of the installation work. It is desirable that the temporary fixing means function as a positioning means for determining the fixing position where the lower housing is fixed to the main body. In this case, the efficiency of the installation work is further improved.

[0010] In the power conditioner described above, it is preferable that the lower housing has drainage holes on its bottom surface for draining any liquid that has entered the interior to the outside. In this case, even if liquid such as rainwater enters the interior, the liquid can be drained to the outside. As a result, it is possible to prevent the wiring inside the lower housing from being submerged in the liquid.

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

[0012] Therefore, in the power conditioner, the opening of the lower housing is provided with a plurality of rear openings, and the lower housing may be provided with at least one removable closing member that closes each of the rear openings. In this case, one of the rear openings of the lower housing can be aligned with the position of various openings on the wall, and the remaining rear openings can be closed with the closing members. As a result, the power conditioner can be mounted at various positions on the wall.

[0013] In the power conditioner, the lower housing may further have a positioning hole at the bottom for attaching the sealing member to a predetermined position. In this case, the sealing member can be attached to a predetermined position using the positioning hole. Furthermore, since the positioning hole is a through hole provided at the bottom of the lower housing, the positioning hole to which the sealing member is not attached to the lower housing can function as the aforementioned drain hole.

[0014] In the power conditioner described above, the main body may be made of metal, and the lower housing may be made of plastic. In this case, the electrical circuit inside the main body can be protected from external electromagnetic waves. Furthermore, since the lower housing can be manufactured in various shapes, for example, the temporary fixing means, the drainage holes, the positioning holes, etc., can be easily formed in the lower housing. Moreover, the lower housing can be formed in a shape that facilitates fixing with the fixing means. The main body may be a plastic housing with a metal shielding member provided on the inner or outer surface. In this case as well, the electrical circuit can be protected from external electromagnetic waves.

[0015] Incidentally, in this disclosure, the space for wiring connection work in the lower part of the main body can be narrowed. This makes the main body smaller and improves 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 for transporting the main body. In this case, it becomes unnecessary to provide gripping parts on the sides of the main body, and the width of the main body can be reduced.

[0017] In the power conditioner, the main body is capable of having a conduit for housing and protecting the wiring attached to its bottom surface, and the opening of the lower housing further includes a bottom opening through which the conduit passes, and the lower housing may be separable into front and rear sections by cutting through the bottom opening. In this case, the wiring inside 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 The wiring, which is concealed by the conduit, can be routed into the main body. 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. [Effects of the Invention]

[0018] According to one aspect of the present disclosure, the following advantageous effects are provided: aesthetic appearance can be maintained, and wiring connection work is easy. Brief Description of the Drawings

[0019] [Figure 1] (a) is a front view showing the configuration of the power conditioner according to an embodiment of the present disclosure, showing the configuration of the power conditioner attached to a wall surface with a front cover removed, and (b) is a perspective view of the power conditioner viewed upward from the lower side. [Figure 2] It is a perspective view showing the configuration of the power conditioner. [Figure 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 enclosed by an alternate long and short dash line α in (b), and (e) is a cross-sectional view of a portion enclosed by an alternate long and short dash line β in (b). [Figure 4] It is an exploded perspective view showing the configuration of the power conditioner in a state where the front cover is removed, with the front side facing upward. [Figure 5] (a) is a perspective view showing the configuration of the lower housing of the power conditioner, (b) is a front view thereof, (c) is a side view thereof, (d) is a cross-sectional view taken along line A-A of (b), and (e) is an enlarged cross-sectional view showing a drainage hole provided on the bottom surface of the lower housing. [Figure 6] (a) is a perspective view showing a state where a sliding cover has started to be closed on one of the rear openings located on both sides of the rear surface of the lower housing of the power conditioner, and (b) is a perspective view showing a state where the closing of the sliding cover is completed. [Figure 7] It is a perspective view showing a procedure for attaching the power conditioner to a wall surface. [Figure 8] (a), (b), (c), and (d) are cross-sectional views showing a procedure for attaching the lower housing to the bottom surface portion of the power conditioner main body. [Figure 9]It is a front view showing the configuration of a modified example of the power conditioner, showing the configuration of the power conditioner attached to a wall surface with the front cover removed. [Figure 10] It is an exploded perspective view showing the configuration of a lower housing in the power conditioner of the modified example, with the front side facing upward.

Mode for Carrying Out the Invention

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

[0021] (Application Example) First, an example of a scenario 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 an aspect 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, as viewed upward from the lower side. Note that in Fig. 1(a), some members are shown in cutaway.

[0022] As shown in Fig. 1, the power conditioner 10 includes a main body 11 into which a plurality of wires 4 are led 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 upper surface to the back surface, and the opening includes an upper surface opening 28 through which the plurality of wires 4 pass from the inside to the main body 11, and at least a part of the plurality of wires 4 passes from the outside on the back side to a back wall opening 22 (back opening) that communicates with the inside.

[0023] According to the above configuration, there is also an opening between the top opening 28 and the rear wall opening 22 of the lower housing 20. Therefore, the wiring 4 from the outside on the rear side can be pulled in from the bottom of the main body 11, the wiring connection work can be done inside the main body 11, and then the lower housing 20 can be attached to the main body 11, and the wiring 4 can be housed 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 concealed by the lower housing 20, thus maintaining an aesthetic appearance.

[0024] (Example configuration) The embodiments of this disclosure will be described below with reference to Figures 1 to 8.

[0025] (Power conditioner configuration) The power conditioner in this embodiment is a power conditioner (Power Conditioning System) used in a grid-connected system utilizing solar power generation.

[0026] A grid-connected system consists of multiple solar panels installed on the roof of a house, etc., and a power conditioner that converts the DC power generated by each solar panel into AC power. This grid-connected system supplies AC power to loads connected between the power conditioner and the commercial power grid by switching between grid-connected operation and standalone operation. Here, grid-connected operation means operating the power conditioner in conjunction with the commercial power grid. Standalone operation means operating only the power conditioner, for example, when the commercial power grid 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 unit and connected to various connection terminals on the input side switch, output side terminal block, etc. of the power conditioner unit. In this case, the wiring 4 pulled into the power conditioner unit will be exposed, which is undesirable from the standpoint of protecting the wiring 4 and aesthetically. The power conditioner of this embodiment was devised to solve these problems.

[0028] The configuration of the power conditioner 10 in this embodiment will be described based on Figures 2 and 3(a), 3(b), 3(c), 3(d), and 3(e). Figure 1(a) shows the configuration of the power conditioner 10, and is a front view showing the configuration of the power conditioner 10 mounted on a wall with the front cover 13 removed.

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

[0030] As shown in Figures 2 and 3(a),(b),(c),(d), and(e), the power conditioner 10 comprises a roughly 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 on the lower side of the main body 11 and on the right rear side of the lower housing 20.

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

[0032] Furthermore, in the power conditioner 10 of this embodiment, the upper front side of the main body 11 extends upward and further to the rear. Also, the upper part of the front cover 13 extends rearward and further downward. As a result, a space is formed on the upper front side of the power conditioner 10 into which an operator's fingers can be inserted. On the other hand, the lower front side of the main body 11 extends downward and further to the rear. Also, the lower part of the front cover 13 extends rearward. As a result, a space is formed on the lower front side of the power conditioner 10 into which an operator's fingers can be inserted.

[0033] By the way, referring to Figures 1(a) and 1(b), the wiring 4 from the bottom of the main body 11 to the various connection terminals extends in a simple manner. Therefore, the space for wiring connection work in the lower part of the main body 11 can be narrowed. This makes the main body 11 smaller and improves the strength of the lower part of the main body 11.

[0034] Therefore, in the power conditioner 10 of this embodiment, the parts forming the upper front side and the lower front side of the main body 11 become gripping parts 50 and 51 for transporting the main body 11, respectively. In this case, it is not necessary to provide gripping parts on the sides of the main body 11, and the width of the main body 11 can be reduced.

[0035] Figure 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 upwards. As shown in Figure 4, when the front cover 13 is removed, the main body 11 exposes components such as the input switch 15, the output terminal block 16, and other display units. The bottom surface 11a of the main body 11 is provided with multiple wiring holes 14 for passing external wiring 4. Therefore, the wiring 4 that is drawn into the main body 11 from the outside through the wiring holes 14 is connected to the various connection terminals of the input switch 15 and the output terminal block 16.

[0036] On both sides of the upper part of the main body 11, there are projections 12, 12 that protrude from the sides. As shown in Figure 7, which will be described later, the main body 11 can be attached to the mounting base plate 1 by hooking these projections 12, 12 onto the hook portion 1c of the mounting base plate 1 which is fixed to a wall surface (not shown).

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

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

[0039] As shown in Figures 5(a),(b),(c),(d), and(e), the lower housing 20 has a bottomed box shape, with an upper opening 28 on the top surface and two rear wall openings 22,22 on the rear side.

[0040] The two rear wall openings 22-22 are used to allow wiring 4 to be routed through one of the rear wall openings 22 to the lower enclosure 20 via the concealed duct 3. In this case, the other rear wall opening 22 needs to be closed to prevent rainwater from entering. Therefore, as shown in Figures 6(a) and 6(b), the other rear wall opening 22 is covered with a removable sliding cover 23. That is, the two rear wall openings 22-22 are the same size so that the sliding cover 23 can slide regardless of which rear wall opening 22-22 it is inserted into. This allows the concealed duct 3 to be located on either the left or right side, depending on where the wiring 4 is exposed from the wall. As a result, the power conditioner 10 can be mounted at various positions on the wall.

[0041] In this embodiment, as shown in Figures 5(d) and 5(e), the lower housing 20 has drainage holes 25 formed at its bottom, and a sloping portion 26 is formed around the drainage holes 25. As a result, even if rainwater (liquid) enters the lower housing 20, the rainwater is discharged to the outside through these drainage holes 25.

[0042] Furthermore, as shown in Figure 5(a), a canopy portion 24 is formed on the rear side of the upper opening 28 of the lower housing 20. The canopy portion 24 has a canopy opening 24a (temporary fastening means) for passing a knurled screw 17 (temporary fastening means), which will be described later, through when attaching the lower housing 20 to the bottom surface portion 11a of the main body 11. The canopy opening 24a is large on the front side of the canopy portion 24 so that the knurled screw 17 can be inserted with ease, while the rear side of the canopy portion 24 is an opening slightly wider than the width of the knurled screw 17 so that the knurled screw 17 can be fixed in place.

[0043] The concealed duct 3 is provided to conceal the wiring 4 exposed from a wall surface (not shown). That is, as shown in Figure 4, the main body 11 usually has various electrical equipment, connection terminals, etc. on the front side and a fan, heat sink, etc. on the rear side. Therefore, the lower housing 20 is located on the lower side of the power conditioner 10, in the front half position. As a result, 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 in this space. Therefore, in this embodiment, the concealed 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] As shown in Figure 4, the concealed duct 3 has a rear duct opening 3a on the back side, a front duct opening 3b on the front side, and a bottom duct opening 3c on the bottom side. The rear duct opening 3a and the front duct opening 3b are openings through which the wiring 4 passes. The bottom duct opening 3c is for facilitating the installation of the wiring 4 in the concealed duct 3 and is covered by a duct cover 3d.

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

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

[0047] As shown in Figure 7, when mounting the power conditioner 10 of this embodiment to a wall surface (not shown), the mounting base plate 1 is first attached to the wall surface (not shown) with screws 1a. Although only one screw 1a is shown in Figure 7, in reality, there are multiple screws 1a in different locations.

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

[0049] Next, the main unit 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 that protrude from both the left and right sides 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 bottom surface 11a of the main body 11 is resting on the bent lower end plate 1b of the mounting base plate 1. Therefore, the main body 11 is fastened from below with a screw 1d through the bottom surface 11a of the main body 11 to the bent lower end plate 1b of the mounting base plate 1. This fixes the main body 11 to the mounting base plate 1.

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

[0052] Furthermore, it is preferable that the wiring 4 from the concealed duct 3 to the main body 11 be positioned higher than the bottom surface of the concealed duct 3. This ensures that the wiring 4 from the concealed duct 3 to the main body 11 is securely housed inside the lower housing 20.

[0053] After the wiring work is completed, the gaps between the multiple wires 4 that pass through the main unit wiring hole 14 are filled with putty (sealed with a sealing material). This prevents insects and other creatures from entering the main unit 11.

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

[0055] To close the left rear wall opening 22 of the lower housing 20, as shown in Figure 6(a), the sliding grooves 23a and 23a provided on both ends of the sliding cover 23 are inserted into the edges of the rear wall opening 22 of the rear wall 21 of the lower housing, and the sliding cover 23 is slid downward. As a result, the sliding cover 23 can be used to close the left rear wall opening 22 of the lower housing 20, as shown in Figure 6(b).

[0056] Furthermore, the protrusions 23b, 23b provided on both sides of the lower end of the slide cover 23 fit into the positioning holes 29, 29 provided on the bottom surface of the lower housing 20. This ensures that the slide cover 23 is mounted in a predetermined position, preventing it from moving forward, backward, left, or right, and reliably closing the left rear wall opening 22 of the lower housing 20.

[0057] Furthermore, as shown in Figure 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, that is, the positioning holes 29-29 provided near the rear wall opening 22 that is not closed by the sliding cover 23, function similarly to the drainage holes 25 to discharge rainwater and the like that which have entered the lower housing 20 to the outside.

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

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

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

[0061] Next, as shown in Figure 4, the lower housing 20 is screwed and fixed to the main body 11. In this embodiment, the front corners of the lower housing 20 are rounded, and front edge portions 30, 30 are provided on the upper surface of the front corners. The lower housing 20 also has rear pipe portions 31, 31 between the canopy portion 24 and the rear wall openings 22, 22. Then, four screws 32 (fixing means) are used from below the lower housing 20 to fasten (fix) it to the bottom surface portion 11a of the main body 11, passing through the front edge portions 30, 30 and the rear pipe portions 31, 31.

[0062] Therefore, when attaching the lower housing 20 to the main body 11, it is temporarily fixed before being secured with screws, thus improving the efficiency of the installation work. Furthermore, the knurled screw 17, the canopy opening 24a, and the locking part 27 also function as positioning means to determine the fixed position of the lower housing 20 on the main body 11, further improving the efficiency of the installation work.

[0063] In this embodiment, the rear tube sections 31-31 are tapered, becoming narrower from the bottom to the top. This makes it easier to insert the screw 32 from the bottom to the top of the rear tube section 31, resulting in increased work efficiency.

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

[0065] As a result, as shown in Figure 1(b), the wiring 4 that is routed from the wall to the main unit 11 can be concealed. Finally, the installation of the power conditioner 10 is completed by attaching the front cover 13 to the main unit 11.

[0066] (modified version) Figure 9 shows a modified configuration of the power conditioner, and is a front view showing the configuration of the power conditioner 10a mounted on a wall with the front cover 13 removed. Figure 10 is an exploded perspective view showing the configuration of the lower housing 20a of the modified power conditioner 10a with the front side facing upwards.

[0067] As shown in Figure 9, in this modified example, a conduit 40 for housing and protecting one or more wires 4 can be attached to the main body wiring hole 14 of the main body 11. In addition, a conduit hole 33 (bottom opening) for passing the conduit 40 from the outside is provided on the bottom surface of the lower housing 20a, corresponding to the main body wiring hole 14.

[0068] This modified version can accommodate cases where some of the wiring 4 is routed into the main body 11 through the conduit 40, while the remaining wiring 4 is routed into the main body 11 through the wall surface, 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, while the wiring 4 that does not use the conduit 40 can be concealed using the lower housing 20. This modification can also accommodate cases where all of the wiring 4 is routed into the main body 11 through the conduit 40.

[0069] As shown in Figure 10, in this modified example, the lower housing 20a is separable into front and rear sections so as to cut through the conduit holes 33. Specifically, the lower housing 20a comprises a front section 34 and a rear section 35. The front section 34 has a front recess 34a that forms part of each conduit hole 33, and the rear section 35 has a rear recess 35a that forms the remainder of each conduit hole 33.

[0070] When attaching the lower housing 20a with the above configuration to the main body 11, first, the rear part 35 of the lower housing is temporarily fixed as shown in Figure 8 (a), (b), (c), and (d), and then it is screwed in with two screws 32. Next, the conduit 40 connected to the main body wiring hole 14 is brought into contact with the rear recess 35a of the rear part 35 of the lower housing. Next, the front part 34 of the lower housing is temporarily fixed as shown in Figure 8 (a), (b), (c), and (d), and then it is screwed in with two screws 32. Therefore, even when the conduit 40 is connected to the main body wiring hole 14 of the main body 11, the lower housing 20a, which includes the front part 34 and the rear part 35 of the lower housing, can be easily attached to the main body 11.

[0071] Furthermore, this disclosure is not limited to the embodiments described above, and various modifications are possible within the scope of the claims. Embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of this disclosure. Moreover, 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 Front opening of the duct 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 unit wiring holes 15 Input side switch 16 Output terminal block 17. Knurled screw (temporary fastening method) 20, 20a Lower enclosure 21 Lower enclosure rear wall 22 Rear wall opening (opening, rear opening) 23. Sliding lid (closing member) 23a Slide groove 23b Projection piece 24 Eaves 24a Canopy opening (temporary fastening means) 25 drainage holes 26 Slope 27 Locking mechanism (temporary fastening means) 28 Top opening (opening) 29 Positioning holes (drainage holes) 30 Front edge 31 Rear pipe section 32. Screw (fixing means) 33 Conduit hole (bottom opening) 34 Front of the lower housing 34a Front recess 35 Rear of the lower casing 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 it, The rear side of the aforementioned power conditioner is attached to a mounting member that is mounted on the wall. The power conditioner has a shape that extends upward to the front of its upper surface and further extends to the rear. The aforementioned shape, which extends upward and further backward, is characterized in that it is a space or gap for inserting a finger when attaching the power conditioner to the mounting member attached to the wall surface.

2. A power conditioner according to claim 1, The power conditioner has a shape that extends downward from the front of its lower surface and further extends to the rear. The aforementioned shape, which extends downward and further backward, is characterized in that it is a space or gap for inserting a finger when mounting the power conditioner to a wall surface.

3. A power conditioner according to claim 1 or 2, The power conditioner has a shape that extends upward on the upper front side, then further extends backward, and then further extends downward. The aforementioned shape, which extends upward, then backward, and then downward, is characterized in that it is a space or gap for inserting a finger when mounting the power conditioner to a wall surface.

4. A power conditioner according to any one of claims 1 to 3, The power conditioner, when mounted on a wall, comprises a main body having a top surface, a bottom surface, side surfaces, a front side, and a rear side. A power conditioner characterized in that a front cover is attached to the front side of the main unit and a heat sink is provided on the rear side.

5. A method for mounting a power conditioner to a wall, comprising mounting the power conditioner according to any one of claims 1 to 4 to a wall using a mounting member that can be attached to the wall, The mounting member and the power conditioner each have an engaging portion that engages with each other. The first step involves attaching the aforementioned mounting member to the wall surface, A second step involves the worker grasping the space or gap formed on the upper front side of the power conditioner and transporting it to the vicinity of the mounting member, A third step involves engaging the engaging portion of the power conditioner with the engaging portion of the mounting member, thereby mounting the power conditioner to the wall surface. A method for mounting a power conditioner to a wall, characterized by having [a certain feature].

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