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 solar power generation system. [Background technology]

[0002] In a conventional solar power generation system, the DC power generated by the solar cell is converted into appropriate DC power and / or appropriate AC power by a power conditioning system. The solar cells are then converted into solar power. The converted power is then output to a distribution board or to an external power grid. For this reason, wiring for inputting power from the solar cells and wiring for outputting power to external devices are routed inside the power conditioner housing 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 through an opening on the back surface of the housing, or through an opening on the bottom surface of the housing (see, for example, Patent Document 1). The former has the advantage of maintaining aesthetic appearance since the wiring is more reliably concealed than 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).

[0005] One aspect of the present disclosure has been made to solve the above-mentioned problems, and its purpose is to provide a power conditioner that can maintain its 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 comprising 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 through the bottom of the main body and connected inside the main body, the lower housing can be attached to the main body and the wiring can be housed in the lower housing. As a result, the wiring connection work can be easily performed. Furthermore, the wiring pulled in from the outside of the rear side to the main body is concealed by the lower housing, maintaining an aesthetic appearance.

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

[0009] In the above case, when attaching the lower housing to the main body, the lower housing can be temporarily attached using a temporary fastening means and then fixed using a fixing means, thereby improving the efficiency of the attachment work. Note that it is desirable that the temporary fastening means function as a positioning means for determining the 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 inside the lower housing can be prevented from being submerged in the liquid.

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

[0012] Therefore, in the power conditioner, the opening of the lower housing may include a plurality of rear openings, and the lower housing may include 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 a wall, and the remaining rear openings can be closed with a closing member. As a result, the power conditioner can be mounted in various positions on a wall.

[0013] In the power conditioner, the lower housing may further include a positioning hole in its bottom for attaching the blocking member to a predetermined position. In this case, the blocking member can be attached to the predetermined position by the positioning hole. Furthermore, since the positioning hole is a through-hole provided in the bottom of the lower housing, the positioning hole where the blocking member is not attached to the lower housing can function as the aforementioned drain 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 electrical circuitry 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 fastening means, the 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 facilitates fastening with the fastening means. Note that the main body may be a plastic housing with a metal shielding member provided on the inner or outer surface. In this case, the electrical circuitry can still be protected from external electromagnetic waves.

[0015] According to the present disclosure, the space for wiring connection work in the lower part of the main body can be narrowed, which allows the main body to be made smaller and the strength of the lower part of the main body to be improved.

[0016] Therefore, in the power conditioner, the main body may be provided with grips on the top and bottom surfaces for carrying the main body, which eliminates the need to provide grips on the sides of the main body and allows the width of the main body to be narrower.

[0017] In the power conditioner, the main body can be fitted with a conduit on its bottom surface to house and protect the wiring, and the opening of the lower housing further includes a bottom opening through which the conduit passes, and the lower housing can be separated into front and rear sections by cutting the bottom opening. In this case, the wiring inside the conduit attached to the bottom surface of the main body can be drawn into the main body. Therefore, the wiring concealed by the conduit and the lower housing can be separated into front and rear sections by cutting the bottom opening. 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, it is possible to achieve the effects of maintaining aesthetic appearance and facilitating wiring connection work. [Brief explanation of the drawings]

[0019] [Figure 1] FIG. 1(a) shows the configuration of a power conditioner in an embodiment of the present disclosure, and is a front view showing the configuration of the power conditioner mounted on a wall surface with the front cover removed, and FIG. 1(b) is an oblique view of the power conditioner viewed from below. [Figure 2] FIG. 2 is a perspective view showing a 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 the part surrounded by the dashed line α in (b), and (e) is a cross-sectional view of the part surrounded by the dashed 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. [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 AA of (b), and (e) is a cross-sectional view showing an enlarged view of a drainage hole provided on the bottom surface of the lower housing. [Figure 6] (a) is an oblique view showing the state in which the sliding lid has begun to be closed on one of the rear openings on both sides of the rear surface of the lower housing of the power conditioner, and (b) is an oblique view showing the state in which the sliding lid has been closed. [Figure 7] 4 is a perspective view showing a procedure for attaching the power conditioner to 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 illustrating the configuration of a modified example of the power conditioner, and is attached to a wall surface with the front cover removed. [Figure 10] FIG. 10 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 INVENTION

[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] (Application example) First, an example of a situation in 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 drawn 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 has 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 from the inside to the main body 11, 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) that leads to the interior.

[0023] According to the above configuration, there is also an opening between the top opening 28 and the rear wall opening 22 in the lower housing 20. 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 housed in the lower housing 20. As a result, the wiring connection work can be performed easily. Furthermore, the wiring 4 pulled into the main body 11 from the outside on the rear side is concealed by the lower housing 20, thereby maintaining an aesthetic appearance.

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

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

[0026] A grid-connected system consists of multiple 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 the commercial power grid by switching between grid-connected operation and stand-alone operation. Here, grid-connected operation refers to operation in which the power conditioner is connected to the commercial power grid. Stand-alone operation refers to operation of only the power conditioner, for example, when the commercial power grid experiences a power outage.

[0027] 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 on the input switch, output 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 this 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 dotted line α in FIG. 3(b). FIG. 3(e) is a cross-sectional view of a portion surrounded by a dashed dotted 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 3(a), (b), (c), (d), and (e), 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 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] Furthermore, in the power conditioner 10 of this embodiment, the front top surface of the main body 11 extends upward and then rearward. Furthermore, the upper part of the front cover 13 extends rearward and then downward. As a result, a space is formed on the front top surface of the power conditioner 10 into which an operator can insert his or her fingers. Meanwhile, the front bottom surface of the main body 11 extends downward and then rearward. Furthermore, the lower part of the front cover 13 extends rearward. As a result, a space is formed on the front bottom surface of the power conditioner 10 into which an operator can insert his or 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 allows the main body 11 to be made smaller and the strength of the lower part of the main body 11 to be improved.

[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 carrying main body 11. In this case, there is no need to provide gripping portions on the sides 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 components such as a display unit are exposed. The main body bottom portion 11a of the main body 11 is provided with a plurality of main body wiring holes 14 through which external wiring 4 passes. 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 side surfaces 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), thereby mounting the main body 11 to the mounting base plate 1.

[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, the lower housing 20 can be manufactured in various shapes, as shown in FIG. 5 (described later). For example, the lower housing 20 can easily have the eaves opening 24a, the locking portion 27, the drain hole 25, the positioning hole 29, the rear pipe portion 31, and the like (described later). The main body 11 is made of metal to block external electromagnetic waves and protect the electrical circuits provided therein, but this is not a limitation. For example, the main body 11 may be a plastic housing with a metal shielding member on the inner or outer surface. Even in this case, the shielding member can block external electromagnetic waves and protect the electrical circuits.

[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 drain 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 attached to 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 attached. 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 to pull the wiring 4 into the lower housing 20 via the concealed duct 3 through one of the rear wall openings 22. In this case, the other rear wall opening 22 must be closed to prevent rainwater and other water from seeping in if 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 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 is inserted into. Therefore, depending on the position where the wiring 4 is exposed from the wall surface, the concealed duct 3 can be located on either the left or right side. As a result, the power conditioner 10 can be installed in various positions on the wall.

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

[0042] 5(a), a visor portion 24 is formed on the back side of the top opening 28 of the lower housing 20. The visor portion 24 has a visor opening 24a (temporary fastening means) through which a knurled screw 17 (temporary fastening means) described below is passed when attaching the lower housing 20 to the main body bottom surface 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 typically has various electrical devices, connection terminals, etc. provided on the front side, and a fan, heat sink, etc. provided on the rear side. Therefore, the lower housing 20 is provided below the power conditioner 10, in a position of the front half. 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 in this distance. 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 intended to facilitate the installation of the wiring 4 in the concealed duct 3, and is 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 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 on the wall) A method for attaching the power conditioner 10 to a wall surface will be described with reference to Fig. 7. Fig. 7 is a perspective view showing a procedure for attaching the power conditioner 10 to a wall surface.

[0047] As shown in Fig. 7, when mounting the power conditioner 10 of this embodiment on a wall surface (not shown), the mounting base plate 1 is first mounted on the wall surface (not shown) with a screw 1a. Note that although Fig. 7 shows only one screw 1a, in reality, the screws 1a are present in multiple locations.

[0048] After the mounting base plate 1 is attached to the wall surface, the concealed duct 3 is attached with a screw 3e to, for example, 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 back 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 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 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, passing through the bottom surface 11a of the main body 11 and screwing it onto 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. 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 wiring work, multiple wires 4 (not shown) are passed from a wiring opening (not shown) formed in a wall (not shown) through the duct back opening 3a of the concealed duct 3, and 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 multiple main body wiring holes 14 provided on the main body bottom portion 11a, as shown in FIG. 4.

[0052] 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 allows the wiring 4 from the concealed duct 3 to the main body 11 to be reliably 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 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, as shown in (a), (b), (c), and (d) of FIG. 5. Therefore, the rear wall opening 22 on the side where the concealed duct 3 is not present 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 is not present is closed with a sliding lid 23. In this embodiment, when the power conditioner 10 is viewed from the front side, the concealed duct 3 is present 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, as shown in FIG. 6(b), the slide cover 23 closes the left rear wall opening 22 of the lower housing 20. The face wall opening 22 can be closed.

[0056] Furthermore, protrusions 23b provided on both sides of the lower end of sliding cover 23 fit into positioning holes 29 provided in the bottom surface of lower housing 20. This prevents sliding cover 23 from moving back and forth or side to side, ensuring that rear wall opening 22 on the left side of 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 cover 23, function, like the 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 11a of the main body 11. (a), (b), (c), and (d) of Figure 8 are cross-sectional views showing the procedure for attaching the lower housing 20 to the main body bottom surface 11a of the main body 11.

[0059] As shown in Fig. 8(a), first, a knurled screw 17 is screwed into a 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 Fig. 8(b).

[0060] Next, as shown in Fig. 8(c), the lower housing 20 is slid forward along the main body bottom surface 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 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 11a of the main body 11.

[0061] Next, as shown in FIG. 4, the lower housing 20 is fixed to the main body 11 with screws. In this embodiment, the front corners of the lower housing 20 are rounded, and front edge portions 30 are provided on the upper surfaces of the front corners. In addition, rear pipe portions 31 are provided on the lower housing 20 between the eaves portion 24 and the rear wall openings 22. Then, four screws 32 (fixing means) are inserted from below the lower housing 20 and passed through the front edge portions 30 and 30 and the rear pipe portions 31, 31 of the lower housing 20 to screw (fix) it 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 fastened with screws, improving the efficiency of the attachment work. Furthermore, knurled screws 17, eaves openings 24a, and locking portions 27 also function as positioning means for determining the fixing position of lower housing 20 on main body 11, further improving the efficiency of the attachment work.

[0063] In this embodiment, the rear tube portions 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 portions 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, the duct cover 3d is screwed to the duct bottom opening 3c of the concealed duct 3.

[0065] As a result, as shown in FIG. 1(b), the wiring 4 drawn into the main body 11 from the wall surface is concealed. Finally, the front cover 13 is attached to the main body 11, thereby completing the installation of the power conditioner 10.

[0066] (Variation) Fig. 9 shows the configuration of a modified power conditioner, and is a front view showing the configuration of power conditioner 10a attached to a wall surface with front cover 13 removed. Fig. 10 is an exploded perspective view showing the configuration of lower housing 20a in power conditioner 10a of the modified example, 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 external conduit 40 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 electrical conduits 40, while the remaining wiring 4 is drawn into the main body 11 from the wall surface 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 electrical conduits 40, and the wiring 4 that does not use the electrical conduits 40 can be concealed using the lower housing 20. Note that this modified example can also accommodate a case where all of the wiring 4 is drawn into the main body 11 through the electrical conduits 40.

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

[0070] When attaching the lower housing 20a configured as described above to the main body 11, first, the lower housing rear portion 35 is temporarily fixed as shown in (a), (b), (c), and (d) of FIG. 8, and then fastened with two screws 32. Next, the electrical conduit 40 connected to the main body wiring hole 14 is abutted against the rear recess 35a of the lower housing rear portion 35. Next, the lower housing front portion 34 is temporarily fixed as shown in (a), (b), (c), and (d) of FIG. 8, and then fastened with two screws 32. Therefore, even when the electrical 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 portion 34 and the lower housing rear portion 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. 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 body 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 lid (closure 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 Front of lower housing 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 predetermined DC power or AC power and outputs the converted power, The power conditioner has, on a front side, an input side connection terminal to which a wiring for inputting electric power is connected and an output side connection terminal to which a wiring for outputting electric power is connected, and has, on a rear side, a heat sink; Furthermore, the power conditioner is attached to a mounting member attached to a wall surface, and has a shape that extends upward and further backward across the entire front upper surface, including the central portion, and this shape forms a space or gap into which a finger can be inserted when attaching the power conditioner to the mounting member. The power conditioner is characterized by:

2. A power conditioner according to claim 1, The front side of the lower surface of the power conditioner has a shape that extends downward and further rearward, and this shape forms a space or gap into which a finger can be inserted when attaching the power conditioner to a wall surface. The power conditioner is characterized by:

3. A power conditioner according to claim 1 or 2, A power conditioner, characterized in that the shape of the front upper surface of the power conditioner extends upward, further rearward, and further downward.

4. A power conditioner according to any one of claims 1 to 3, When attached to a vertical wall, the device has a main body having an upper surface, a lower surface, a side surface, a front side, and a rear side, The power conditioner is characterized in that the main body has a front cover attached to the front side and a heat sink 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 using a mounting member that can be mounted to the wall surface; The mounting member and the power conditioner each have an engagement portion, an attachment step in which the attachment member is attached to a wall surface; a second mounting step in which the space or gap formed on the front upper surface of the power conditioner serves as a space for inserting the fingers of an operator, the power conditioner is grasped by the operator, the power conditioner is carried to the vicinity of the mounting member, and an engaging portion of the power conditioner and an engaging portion of the mounting member are hooked together, thereby mounting the power conditioner to a wall surface; A method for mounting a power conditioner on a wall surface, comprising:

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