JP5238059B2 - Outdoor installation equipment - Google Patents

Description

  The present invention relates to an outdoor installation device installed outdoors such as a junction box and a power conditioner used in a solar power generation system, and more particularly to an improvement of a rainwater waterproof structure of the outdoor installation device. .

  The solar power generation system mainly includes a plurality of solar cell modules disposed on the roof, a junction box that combines the wiring from the plurality of solar cell modules and supplies the DC power to the power conditioner, It is constituted by a power conditioner that converts a DC voltage from a connection box into AC power and links the AC power to a system power supply. Various electronic circuits such as booster circuits and inverter units are built in the junction box and power conditioner. However, for those installed outdoors, there are various types to prevent rainwater from entering the internal electronic circuit. Waterproofing measures are taken.

  A housing of this type of junction box or inverter is usually composed of an outer box whose front is opened and a lid for closing the front opening, and a gap between these outer box and the lid is used. Waterproofing measures are necessary to prevent rainwater from entering inside.

  In Patent Document 1, as shown in FIG. 24, a plate member 103 that protrudes from the upper surface 102 and has a bent guide portion on the tip side is attached to the upper surface 102 of the outer peripheral edge forming the front opening 101 of the outer box 100, An L-shaped plate member 105 extending so as to protrude downward is attached to the upper surface 104b of the lid 104 for closing the front opening 101, and the surface 103a of the plate member 103 and the surface 105a of the plate member 105 are attached. To prevent rainwater from entering inside.

Japanese Patent Laying-Open No. 2004-31481 (FIG. 4)

  However, in the structure shown in the above-mentioned Patent Document 1, since the inside of the rainwater is prevented by the contact structure between the surfaces, a gap between the surfaces is created particularly in the case of a storm or heavy rain. There is a problem that rainwater is sucked up by capillary action and enters inside.

  This invention is made | formed in view of the above, Comprising: It aims at obtaining the outdoor installation apparatus which improved the reliability of the waterproof function with respect to rainwater approach for a long term.

  In order to solve the above-described problems and achieve the object, the present invention covers a box-shaped casing body in which an opening is formed on the front surface and an electronic circuit board is accommodated therein, and a front opening in the casing body. A box-shaped front panel, and the casing body has a standing portion with the front side of the upper plate protruding upward, and is a left and right side plate of the casing body, and the left and right side plates of the front panel At least one convex part extending in the up and down direction is formed in the facing region, the region not facing the left and right side plates of the front panel in the left and right side plates of the casing body, and in the vicinity of the rear ends of the left and right side plates of the front panel Further, another convex part extending vertically is further formed at a position where the projecting position in the front-rear direction of the standing part with respect to the upper plate is a position between the convex part and the other convex part. .

  According to the present invention, the left and right side plates of the casing main body are formed with at least one convex portion that substantially contacts the left and right side plates of the front panel and extends vertically. The gap is eliminated and rainwater intrusion from the side is surely prevented, and the reliability of waterproofing can be improved even in stormy heavy rain.

FIG. 1 is a perspective view showing an external configuration of a junction box to which the present invention is applied. FIG. 2 is an exploded perspective view in which the front panel and the casing body are disassembled. FIG. 3 is a front view showing the internal structure of the casing body with the inner cover and the terminal block cover removed. FIG. 4 is a front view showing the internal structure of the casing body with the inner cover and the terminal block cover attached. FIG. 5 is a four-sided view of the casing body as seen from four directions. 6 is a D1-D1 partial sectional view showing details of the A1 portion of FIG. 7 is a D2-D2 partial cross-sectional view showing details of the A2 portion of FIG. 8 is a D3-D3 partial cross-sectional view showing details of the A3 portion of FIG. FIG. 9 is a three-side view of the front panel as seen from three directions. 10 is a BB enlarged cross-sectional view showing details of the A4 portion of FIG. FIG. 11 is a three-side view of the heat sink viewed from three directions. FIG. 12 is a three-side view of the inner cover as seen from three directions. FIG. 13 is a three-side view of the junction box as viewed from three directions with the heat sink front cover attached to the casing body. FIG. 14 is an enlarged cross-sectional view showing details of the A5 portion of FIG. FIG. 15 is an enlarged cross-sectional view showing details of the A6 portion of FIG. FIG. 16 is an enlarged cross-sectional view showing a modified form of the side waterproof structure. FIG. 17 is an enlarged cross-sectional view showing details of the A7 portion of FIG. 18 is an enlarged cross-sectional view showing details of a portion A8 in FIG. FIG. 19 is a cross-sectional view showing a sealing structure between the heat sink and the casing body. FIG. 20 is a perspective view showing the arrangement of the sealing with respect to the heat sink. FIG. 21 is a three-sided view showing a sealing structure between the heat sink and the casing body. FIG. 22 is a perspective view showing an arrangement mode of the power board and the small heat sink with respect to the heat sink. FIG. 23 is a front view showing a small heat sink. FIG. 24 is a cross-sectional view showing the prior art.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of an outdoor installation device according to the present invention will be described in detail based on the drawings. Note that the present invention is not limited to the embodiments.

  An embodiment of an outdoor installation device according to the present invention will be described with reference to FIGS. In this embodiment, the present invention is applied to a junction box (multi-array converter) used in a photovoltaic power generation system. As is well known, the connection box is a box for connecting wirings from a plurality of solar cell modules together and connecting them to the power conditioner. In this case, the connection box is used for inspection and maintenance of the solar cell modules. A switch, a lightning protection element, a backflow prevention diode for preventing backflow of electricity to the solar cell module, a booster circuit for boosting DC power from the solar cell module, and the like are provided.

  FIG. 1 is a perspective view showing an external configuration of a junction box, FIG. 2 is an exploded perspective view in which a front panel and a casing body are disassembled, and FIG. 3 is a perspective view of the casing body with the inner cover and terminal block cover removed. FIG. 4 is a front view showing the internal structure, FIG. 4 is a front view showing the internal structure of the casing main body with the inner cover and the terminal block cover attached, and FIG. 5 is a four-sided view of the casing main body from four directions. 6 is a D1-D1 partial cross-sectional view showing details of the A1 portion of FIG. 5, FIG. 7 is a D2-D2 partial cross-sectional view showing details of the A2 portion of FIG. 5, and FIG. 8 is a cross-sectional view of the A3 portion of FIG. 9 is a partial cross-sectional view of D3-D3 showing details, FIG. 9 is a three-sided view of the front panel viewed from three directions, FIG. 10 is an enlarged cross-sectional view taken along line BB showing details of the A4 portion of FIG. View the heat sink from three sides FIG. 12 is a three-side view of the inner cover as viewed from three sides, FIG. 13 is a three-side view of the connection box as viewed from three sides in a state where the heat sink front cover is attached to the casing body, and FIG. FIG. 15 is an enlarged sectional view showing details of the A5 portion of FIG. 13, FIG. 15 is an enlarged sectional view showing details of the A6 portion of FIG. 13, and FIG. 16 is an enlarged sectional view showing a modified form of the side waterproof structure. 17 is an enlarged sectional view showing details of the A7 portion of FIG. 13, FIG. 18 is an enlarged sectional view showing details of the A8 portion of FIG. 13, and FIG. 19 is a sectional view showing a sealing structure between the heat sink and the casing body. 20 is a perspective view showing the arrangement of the sealing with respect to the heat sink, FIG. 21 is a three-view drawing showing the sealing structure of the heat sink and the casing body, and FIG. Is a perspective view showing the arrangement of the power substrate and small heat sink for heat sink, Fig. 23 is a front view showing a small sink.

  As shown in FIG. 1 and FIG. 2, the housing of the connection box 1 has a substantially box-shaped casing body 2 made of metal with an open front surface and a substantially box-shaped shape made of metal covering the front opening of the casing body 2. It is comprised by the front panel 3 as a cover body. In this case, the junction box 1 is of a type installed on the wall, and has two mounting holes 4 formed above the back plate 2a (see FIGS. 3 and 5) of the casing body 2 and below the back plate 2a. The casing body 2 is screwed to the wall using the two mounting holes 5 formed.

  The casing body 2 includes a heat sink 10 for heat dissipation, a terminal block 20, a power board 30, a control board 35, a metal inner cover (also referred to as a board cover) 40, a metal terminal block cover 50, and the like. . As shown in FIG. 13 and the like described above, the heat sink 10 is disposed on the rear side of the casing body 2, and the power board 30 and the control board 35 are disposed on the front side of the casing body 2 as shown in FIG. An electronic circuit board such as is arranged.

  FIG. 3 is a front view of the inside of the casing body 2 in a state where the substrate cover 40 and the terminal block cover 50 are removed. FIG. 3 shows a plurality of pieces disposed on the front side of the casing body 2. A power board 30 (in this case, four), a plurality of (in this case, four) control boards 35, and a terminal block 20 disposed on the side thereof are shown. In this case, the control board 35 is a daughter board of the power board 30 and is attached to the power board 30 perpendicularly. One power substrate 30 and control substrate 35 correspond to one solar cell array in which a plurality of solar cell modules are connected in series, and one power substrate 30 and control substrate 35 perform a boost operation on one solar cell array. Perform various electrical processing and control. In FIG. 3, on each control board 35, an LED 36 for notifying the operation state of each power board 30 and control board 35 for each solar cell array is mounted.

  As shown in FIG. 3, the terminal block 20 includes a plurality of (in this case, four) switches 21 including input terminals 22, an output terminal 23 connected to the power conditioner side, and the like.

  In FIG. 4, a substantially L-shaped board cover 40 is attached so as to cover the plurality of power boards 30, the plurality of control boards 35, and the surrounding electric circuit portions, and further the terminal block cover so as to cover the terminal block 20. 50 is attached. On the substrate cover 40, a label 41 for entering information such as a solar cell module model name column, a solar cell array specification table, and a cable wiring diagram is attached. The substrate cover 40 and the label 41 are formed with transparent windows at positions corresponding to the four LEDs 36, and the state of each LED 36 can be confirmed even when the substrate cover 40 with the label attached is attached. it can.

  Next, the casing body 2 will be described with reference to FIGS. A plurality of vent holes 6 are formed in parallel on the upper plate 2b of the box-shaped casing main body 2 whose front surface is open so as to correspond to the position where the heat sink 10 is disposed. A plurality of vent holes 7 are also formed in parallel on the lower plate 2c of the casing body 2 so as to correspond to the arrangement position of the heat sink 10. The arrangement pitch of the vent holes 6 and 7 is equal to the arrangement pitch of the radiating fins 11 of the heat sink 10 to be described later, thereby improving the air permeability to the heat sink 10. That is, the hole width d1 of each vent hole 6, 7 is equal to the distance d2 (see FIG. 11) between the radiating fins 11 of the heat sink 10, and the width of the radiating fin 11 is set between the holes in the vent holes 6, 7. The heat sink 10 is attached to the casing body 2 so that the air holes 6 and 7 and the gaps between the heat radiation fins 11 of the heat sink 10 face each other.

  The lower plate 2c of the casing body 2 has a knockout hole 15 for passing a protective tube (not shown) for housing the exposed wiring connection cable to the solar cell array side and the power conditioner, and the lower plate 3c of the front panel 3. A screw hole 16 for fixing the screw (see FIG. 2) is formed. In addition to the mounting holes 4 and 5 described above, a mounting hole 17 for bolting the heat sink 10 and a concealed wiring cable from the wall to the solar cell array side and the power conditioner are provided on the back plate 2a of the casing body 2. A knockout hole 18 for inputting is formed.

  The front side of the left and right side plates 2d of the casing body 2 is formed to protrude forward with respect to the upper plate 2b and the lower plate 2c. As shown in FIG. 6 which is a partial sectional view of the A1 portion and the D1-D1 portion, a convex portion 8a formed by drawing with a mold extends vertically in the portion protruding forward of the left and right side plates 2d. doing. Moreover, the convex part 8b is formed in parallel with the convex part 8a. These convex portions 8a and 8b will be described in detail later with reference to FIG. 15, and function to prevent rainwater from entering the inside of the casing body 2 from the gaps on both side surfaces of the casing body 2 and the front panel 3.

  Further, the front upper side (A2 portion) 2e of the left and right side plates 2d of the casing body 2 protrudes upward with respect to the surface of the upper plate 2b as shown in FIG. The front side of the upward projecting portion 2e is curved so that the front panel 3 can be easily attached. The front side of the upper plate 2b of the casing body 2 is bent in a U shape as shown in FIG. 7 which is a D2-D2 partial sectional view. That is, a standing portion 2f that rises upward is formed on the front surface side of the upper plate 2b of the casing body 2, and a rear protruding portion 2g that protrudes rearward from the standing portion 2f is formed on the tip side thereof. Is formed. Although described in detail later with reference to FIG. 14, the rearward projecting portion 2 g functions to prevent rainwater from entering the casing body 2 from the upper gap between the casing body 2 and the front panel 3.

  Next, the plurality of ventilation holes 6 formed in the upper plate 2b of the casing body 2 are slightly depressed downward by drawing as shown in FIG. 8 which is a partial sectional view of the A3 portion and the D3-D3 portion. Formed in position. That is, an upper plate portion (referred to as an inter-hole edge portion) 2h located between the vent hole 6 and the adjacent vent hole 6 in the upper plate 2b is recessed with respect to the other upper plate portion 2b, and between the two Steps 2i and 2j are formed on the substrate. In this case, a gentle slope is formed in the rear stepped portion 2j. Thus, by making the inter-hole edge 2h recessed downward, the rain water that has entered the vent hole 6 does not flow in the lateral direction but is easily drained downward.

  Next, the front panel 3 will be described with reference to FIGS. 9 and 10. 10 is a cross-sectional view taken along line BB in FIG. The front panel 3 having a substantially box shape includes a front plate 3a, an upper plate 3b, a lower plate 3c, and left and right side plates 3d. An attachment hole 60 for screwing the front panel 3 to the casing body 2 is formed in the lower plate 3c. As shown in FIG. 10, a bent portion 3e that is bent substantially vertically downward is provided on the front end side of the upper plate 3b.

  Next, the heat sink 10 will be described with reference to FIG. The heat sink 10 is composed of a base plate 12 and a plurality of heat radiation fins 11 that are erected with respect to the base plate 12 and extend vertically. The base plate 12 is formed with screw holes 62 for fixing the plurality of power boards 30 and the like.

  Here, among the plurality of heat radiating fins, the plurality of inner heat radiating fins 11 excluding the two heat radiating fins 11 a on both outer sides of the upper surface of the base plate 12 have a step 63 formed between the upper surface of the base plate 12. The upper surface is located at a position lower by a predetermined height h1. With such a structure, rainwater that has entered the upper surface of the radiating fin 11 of the heat sink 10 flows laterally and does not flow into the various electronic circuit boards disposed on the front side of the casing body 2. Rainwater that has entered the upper surface of the water is easily drained to the lower side.

  Next, the substrate cover 40 will be described with reference to FIG. The substrate cover 40 has a substantially L-shaped box shape, and includes a front plate 40a, an upper plate 40b, a lower plate 40c, left and right side plates 40d, and the like. A plurality of ventilation holes 64 are formed in one side plate 40d. A plurality of transparent windows 65 for visually recognizing the state of the LEDs 36 of the control board 35 are formed on the front plate 40a. The front plate 40a is formed with a plurality of screw holes 66 for fixing the substrate cover 40 to the casing body 2 via the power substrate 30, for example.

  The depth dimension of the upper plate 40 b and the lower plate 40 c is set so that the rear end side of the substrate cover 40 contacts the base plate 12 of the heat sink 10. Here, the upper plate 40b of the substrate cover 40 has a downward inclination of a predetermined angle θ from the rear side to the front side, whereby the casing main body from the heat sink 10 side and the front surface side of the upper plate 2b of the casing main body 2 is obtained. Even if rainwater enters the second electronic circuit board side, the entered rainwater is made to flow quickly forward by the inclined upper plate 40b. Rainwater that has flowed forward through the upper plate 40b of the substrate cover 40 travels down the front plate 40a and passes through the gap between the lower plate 2c of the casing body 2 and the lower plate 3c of the front panel 3. Fall outside.

  Next, various waterproof structures in the junction box 1 will be described in detail with reference to FIGS. FIG. 13 is a schematic cross-sectional view of the main part when the heat sink 10 is mounted in the casing body 2 and the front panel 3 is attached to the front surface of the casing body 2 when viewed from three directions.

  First, the upper waterproof structure of the casing body 2 and the front panel 3 indicated by A5 in FIG. 13 will be described with reference to FIG. As shown in FIG. 7, a standing portion 2 f that rises upward is formed on the front surface side of the upper plate 2 b of the casing body 2, and further protrudes rearward from the standing portion 2 f on the tip side. A flat plate-like rear protrusion 2g is formed. Also, as shown in FIG. 10, a bent portion 3e extending substantially vertically downward is formed on the front end side of the upper plate 3b of the front panel 3. When the front panel 3 is attached to the casing body 2, the inner wall surface of the bent portion 3 e of the front panel 3 comes into contact with the front edge of the rear protruding portion 2 g of the casing body 2. The contact structure is obtained. A space 67 having a certain height is provided below the contact portion between the bent portion 3e and the rear protrusion 2g.

  According to such a waterproof structure, rainwater is surely prevented from entering into the casing body 2 by capillarity as in the conventional waterproof structure by contact between the surfaces, and even in a stormy heavy rain The reliability of waterproofing can be improved. Moreover, since the said structure was implement | achieved by bending, without attaching another component to a casing main body, there is no worry of the occurrence of water leak by the clearance gap between attachment components.

  Next, a side waterproof structure between the casing body 2 and the front panel 3 indicated by A6 in FIG. 13 will be described with reference to FIG. As shown in FIG. 6, the left and right side plates 2d of the casing body 2 are formed with two rows of convex portions 8a and 8b formed by drawing with a mold. When the front panel 3 is attached to the casing body 2, one convex portion 8 b located near the tip of the side plate 3 d of the front panel 3 and located outside is located on the side of the casing body 2 and the front panel 3. It is provided in order to prevent the intrusion of rainwater from the gap between the parts. Therefore, the convex portion 8b protrudes as much as possible from the outer shape of the front panel 3 so that the side gap between the casing body 2 and the front panel 3 does not increase the gap between the convex portion 8a due to the deformation of the front panel 3. It is desirable to make it as close as possible.

  On the other hand, although it is the other convex part 8a arrange | positioned inside, this convex part 8a prevents the rainwater which entered from the side part clearance gap between the casing main body 2 and the front panel 3 from approaching into the back | inner side further. Is provided to do. Accordingly, it is desirable to make the gap between the convex portions 8a and 8b and the side plate 3d of the front panel 3 as small as possible, and the convex portions 8a and 8b and the side plate 3d of the front panel 3 are in contact with each other in a range where the front panel 3 is not deformed. It is better to do it.

  According to such a waterproof structure on the side part, there is no gap between the side part of the casing body 2 and the front panel 3, and the intrusion of rainwater from the side part is surely prevented, and the reliability of waterproofing is ensured even in a stormy heavy rain. Can be improved.

  In addition, if the convex portions 8a and 8b are respectively formed in a plurality of rows, the waterproof property can be further improved. In this case, in the plurality of rows of convex portions 8a formed on the inner side, at least one row of the convex portions may be substantially in contact with the side plate 3d of the front panel 3, and the other convex portions are not necessarily side plates 3d of the front panel 3. It is not necessary to make it contact.

  In the above description, the convex portions 8a are provided on the casing body 2. However, as shown in FIG. 16 (a), the same one to plural rows of convex portions 8a are provided on the inner surface side of the side plate 3d of the front panel 3. Even if they are formed, the same effect can be obtained. Also in this case, it is sufficient that at least one row of the convex portions 8a provided on the inner surface side of the side plate 3d of the front panel 3 is substantially in contact with the side plate 2d of the casing main body 2, and the other convex portions are not necessarily the casing main body 2. The side plate 2d may not be in contact with the side plate 3d. Further, as shown in FIGS. 16B to 16D, similar one or more convex portions 8 a may be formed on both the casing body 2 and the front panel 3. In the case of FIG. 16 (b), the convex portion 8 a on the front panel 3 side is arranged on the rear side of the convex portion 8 a on the casing body 2 side, and the front panel 3 is deformed and fitted into the casing body 2. become. In the case of FIG. 16C, the convex portion 8a on the front panel 3 side is formed so that the convex portion 8a on the casing body 2 side faces, and the height of each convex portion can be lowered. The bending and deformation of the casing body 2 and the front panel 3) can be suppressed. In the case of FIG. 16D, the convex portion 8 a on the front panel 3 side is disposed on the front side of the convex portion 8 a on the casing body 2 side, and is fitted into the casing body 2 without deforming the front panel 3. be able to. If one to a plurality of convex portions 8a are formed on both the casing body 2 and the front panel 3 as described above, it is possible to obtain a waterproof effect equal to or higher than the above.

  Next, a waterproof structure of the mounting portion of the heat sink 10 shown by A7 in FIG. 13 will be described with reference to FIG. In this case, the heat sink 10 is fixed to the back plate 2 a of the casing body 2 with screws 14 using the legs 13 that are separate from the heat sink 10. That is, the legs 13 are respectively fixed to the heat radiating fins 11 a on both outer sides where the step 63 is not formed, and the legs 13 are fixed to the back plate 2 a of the casing body 2 with the screws 14. Here, the sealing performance against rainwater is improved by interposing the packing 70 between the heat radiation fin 11a and the leg body 13 and between the leg body 13 and the back plate 2a of the casing body 2. Further, a caulking 80 is formed outside the packing 70 so as to close a gap between the leg 13 and the back plate 2a of the casing body 2.

  Next, the waterproof structure of the upper part of the heat sink indicated by A8 in FIG. 13 will be described with reference to FIG. First, as described above, in the heat sink 10, the upper surfaces of the plurality of radiating fins 11 are made to face the upper surface of the base plate 12 so that a step 63 is formed between the upper surface of the base plate 12 and the upper surfaces of the plurality of radiating fins 11. It is set to a low position. Moreover, as shown in FIG. 8, the several ventilation hole 6 formed in the upper board 2b of the casing main body 2 is formed in the position dented below by drawing. That is, a portion (inter-hole edge portion) 2h between the vent hole 6 and the adjacent vent hole 6 in the upper plate 2b is recessed with respect to the other upper plate portion 2b. In this case, the height position of the inter-hole edge 2 h is lower than the upper surface of the base plate 12.

  Here, a packing 71 as a sealing member is fitted between the upper surface of the base plate 12 of the heat sink 10 and the upper plate 2b of the casing body 2, and as will be described later, the heat sink 10 and the casing body 2 A caulking 80 as a sealing member is applied to all the places where the water contacts and the gaps where rainwater may enter. Therefore, in the present connection box 1, rainwater invades in the region C where the heat sink fins 11 of the heat sink are arranged, which is basically indicated by broken lines in FIG. 13, but rainwater does not invade other regions. . However, there is no guarantee that packing or caulking as a sealing member always ensures complete sealing performance due to aging or manufacturing variations.

  Therefore, in this connection box 1, the heat sink 10 is formed so that the upper surfaces of the plurality of heat radiation fins 11 are lower than the upper surface of the base plate 12, so that the upper surfaces of the plurality of heat radiation fins 11 and the base plate 12 are formed. A step 63 is formed between the upper surface and the rainwater that has reached the upper surface of the radiating fin 11 so that it does not easily enter the upper surface side of the base plate 12, that is, the packing 71, and easily falls downward. Yes. Incidentally, when the upper surface of the plurality of radiating fins 11 and the upper surface of the base plate 12 are made the same height so that the step 63 is eliminated, the rainwater that has reached the upper surface of the radiating fins 11 has no obstacles in the lateral direction ( It flows in the horizontal direction) and becomes easier to enter the packing 71.

  Further, the inter-hole edge 2h between the vent hole 6 and the vent hole 6 is recessed with respect to the other upper plate portion 2b, so that rainwater stored on the upper plate 2b can easily fall downward. At the same time, rainwater that has reached the inter-hole edge 2h is difficult to enter the upper surface side of the base plate 12, that is, toward the packing 71, and easily falls downward. Incidentally, when the inter-hole edge 2h is formed on the same plane as the upper plate 2b without being recessed, the rainwater stored on the upper plate 2b becomes difficult to fall downward and reaches the inter-hole edge 2h. The rainwater travels along the back surface of the inter-hole edge 2h and enters the packing 71. It is desirable that the inter-hole edge 2h is recessed as deep as possible. When the heat sink 10 having the step 63 is formed as in the present embodiment, it is more waterproof if the inter-hole edge 2h is recessed downward to a position lower than the upper surface of the base plate 12. In terms of aspect.

  Thus, according to the waterproof structure of the upper part of the heat sink according to the present embodiment, the rain water easily falls downward and does not easily enter the horizontal direction into the heat sink 10 and the ventilation hole portion on the upper side of the heat sink 10. Since the step structure is provided, it is difficult for rainwater to enter the casing body 2 even if the sealing performance of sealing members such as packing and caulking deteriorates due to aging and manufacturing variations.

  Next, a sealing structure such as a heat sink portion will be described with reference to FIGS. 19 is a cross-sectional view showing a sealing structure between the heat sink 10 to which the leg 13 is attached and the casing body 2, and FIG. 20 is a perspective view showing the arrangement of caulking with respect to the heat sink 10 to which the leg 13 is attached. FIG. 3 is a three-side view showing the arrangement of caulking with respect to the heat sink 10 and the casing body 2 to which the legs 13 are attached. As shown in these drawings, the caulking 80 is applied to the entire periphery of the heat sink 10 so as to eliminate the gap between the heat sink 10 and the casing body 2 and prevent rainwater from entering the inner part of the casing body 2. . Further, as shown in FIG. 21, a caulking 81 is also applied to the inside of the upper projecting portion 2 e of the side plate 2 d of the casing body 2.

  Next, the waterproof structure on the electronic circuit board side will be described with reference to FIG. 22 and FIG. As described above, various waterproofing measures are taken in the junction box 1, and the area where the electronic circuit boards such as the power board 30 and the control board 35 are mounted is directed from the rear side toward the front side. A substrate cover 40 having an upper plate 40b formed with a downward slope of a predetermined angle θ is covered. For this reason, rainwater hardly enters the area where the electronic circuit board is mounted, but the following waterproof measures are provided for the area where the electronic circuit board is mounted in case rainwater enters. Has been made.

  In FIG. 22, a plurality of power boards 30 are attached to the back side of the base plate 12 of the heat sink 10 as described above. Further, a high-voltage driven power substrate 91 having a large amount of heat, such as an IGBT (Insulated Gate Bipolar Transistor), which is electrically connected to the power substrate 30, is mounted on a small flat heat sink 90. In order to avoid the entry of water as much as possible to the power element 91 of such a high voltage drive, in this case, a flange 92 is formed on the upper portion of the small heat sink 90, and the flange 92 is not horizontal. The one inclined to the left or right is used. FIG. 23 is a plan view showing a small heat sink 90 having a flange 92, and the flange 92 is formed with an inclination of an angle φ.

  According to the small heat sink 90 having such a flange 92, rainwater that enters the area where the electronic circuit board is mounted and flows down the back side of the base plate 12 of the heat sink 10 is stopped by the flange 92. Then, it flows downward along the inclination of the flange 92. Therefore, it becomes possible to reliably prevent rainwater from entering the power board 91 as an electronic circuit mounted on the heat sink 90.

  In addition, you may make it apply this invention to the power conditioner which may be installed outdoors in a solar power generation system. Furthermore, you may make it apply not only to the apparatus used for a solar cell system but to other arbitrary outdoor installation apparatuses.

  As described above, the present invention is useful for outdoor installation equipment according to the present invention, connection boxes for solar power generation systems, power conditioners, and other outdoor installation equipment for any system.

DESCRIPTION OF SYMBOLS 1 Connection box 2 Casing main body 3 Front panel 4,5 Mounting hole 6,7 Vent hole 8a, 8b Convex part 10 Heat sink 11, 11a Radiation fin 12 Base board 13 Leg 15 Knockout hole 18 Knockout hole 20 Terminal block 21 Switch 22 Input terminal 23 Output terminal 30 Power board 35 Control board 40 Board cover (inner cover)
41 label 50 terminal block cover 63 step 70, 71 packing 80, 81 caulking 90 small heat sink 91 power element 92 collar

Claims (6)

A box-shaped casing body in which an opening is formed on the front surface and an electronic circuit board is accommodated therein;
A box-shaped front panel covering the front opening of the casing body;
With
The casing body has an upright portion that projects upward the front side of the upper plate,
The left and right side plates of the casing main body, and in the region facing the left and right side plates of the front panel, at least one convex portion extending vertically is formed,
Other convex portions extending vertically are further provided at positions on the left and right side plates of the casing body that are not opposed to the left and right side plates of the front panel and in the vicinity of the rear ends of the left and right side plates of the front panel. Forming,
The outdoor installation device, wherein the protruding position of the standing part with respect to the upper plate in the front-rear direction is a position between the convex part and the other convex part.   2. The outdoor installation device according to claim 1, wherein at least one convex portion extending vertically is formed in a region facing the left and right side plates of the casing main body on the left and right side plates of the front panel.   The outdoor installation device according to claim 1 or 2, wherein the casing body is made of metal.   The outdoor installation device according to claim 3, wherein the standing portion is formed by bending a front side of the upper plate. A metal box-shaped casing body in which an opening is formed on the front surface and an electronic circuit board is accommodated therein,
A metal front panel that covers the front opening of the casing body and has a U-shaped cross section in top view;
With
The left and right side plates of the front panel, wherein at least one convex portion extending vertically is formed in a region facing the left and right side plates of the casing body,
The convex portion is formed by denting the outside of the left and right side plates of the front panel,
The casing body has a box-like shape, and has an upright portion that protrudes upward on the front side of the upper plate,
The left and right side plates of the casing main body, and in the region facing the left and right side plates of the front panel, at least one convex portion extending vertically is formed,
Other convex portions extending vertically are further provided at positions on the left and right side plates of the casing body that are not opposed to the left and right side plates of the front panel and in the vicinity of the rear ends of the left and right side plates of the front panel. Forming,
Outdoor equipment projecting position in the longitudinal direction of the erected portion to said upper plate, characterized by position der Rukoto to be between other protrusions of the convex portion and the casing body of the casing body. The outdoor installation device according to claim 5 , wherein the standing portion is formed by bending a front side of the upper plate.

Images