JP7281669B2 - Casing for wiring and power conversion system including the same - Google Patents

Description

TECHNICAL FIELD The present disclosure relates to a wiring enclosure and a power conversion system including the same. More specifically, the present disclosure relates to a wiring enclosure for housing wires electrically connected to electrical equipment, and a power conversion system including the same.

Patent Literature 1 discloses a power conversion device (electrical equipment) in which electrical components for power conversion of DC power to AC power are housed inside a box-shaped housing with an open front surface. A through hole is provided in the lower part of the rear surface of the housing. A first opening (wire introduction port) is provided on the rear side of the cover (accommodating case) attached to the through-hole.

When this power conversion device is installed on a wall surface, an electric wire passed from a hole in the wall surface to the inside of the cover through the first opening is inserted into the housing through the through hole to electrically connect the electrical components. Connected.

JP 2016-152766 A

When the above power converter is installed outdoors, wires are introduced into the housing through conduits connected to the bottom of the cover, and are electrically connected to electrical components. In this case, although the first opening on the back side of the cover is closed by the auxiliary cover, there is a possibility that rainwater or the like may enter the inside of the cover through the gap between the cover and the auxiliary cover.

An object of the present disclosure is to provide a wiring housing capable of suppressing entry of water into the storage case and a power conversion system including the wiring housing.

A wiring housing according to one aspect of the present disclosure includes a storage case that is attached to an electrical device and stores electric wires that are electrically connected to the electrical device. The storage case includes a first member having an opening at a lower portion thereof in an installation state where the electric device is installed at an installation location, and a second member combined with the first member so as to close the opening of the first member. and a member. A wire introduction port into which the wire can be inserted from the outside is formed in the housing case in a state in which the first member and the second member are combined. A cover member for closing the wire inlet can be attached between the first member and the second member. The first member has a fitting structure into which the outer peripheral portion of the lid member is fitted. The second member has a water receiving portion that is arranged below the fitting structure in the installed state and stores falling water.

A power conversion system according to one aspect of the present disclosure includes a device main body that houses a power conversion circuit that performs power conversion, and the wiring housing described above. The storage case included in the wiring housing is attached to the apparatus main body. The housing case houses the electric wire that electrically connects the external circuit and the power conversion circuit.

Advantageous Effects of Invention According to the present disclosure, it is possible to provide a wiring housing capable of suppressing entry of water into the storage case and a power conversion system including the wiring housing.

FIG. 1 is a cross-sectional view of main parts in a state where a wiring housing according to an embodiment of the present disclosure is attached to a power conversion system. FIG. 2 is a partially broken perspective view of the power conversion system same as the above. FIG. 3 is an external perspective view of the wiring housing as viewed from above. FIG. 4 is an external perspective view of the wiring housing as viewed from below. FIG. 5 is an exploded perspective view of the wiring housing same as the above. FIG. 6 is a perspective view of a lid member included in the wiring housing same as the above. 7 is a cross-sectional view taken along the line A1-A1 in FIG. 1. FIG. FIG. 8 is a system configuration diagram of a power supply system including the same power conversion system. FIG. 9 is an external perspective view of the power conversion system same as the above. FIG. 10 is an exploded perspective view of the same power conversion system as seen from the front side. FIG. 11 is an exploded perspective view of the same power conversion system as seen from the rear side. FIG. 12 is an exploded perspective view of the power conversion system as seen from the rear side. FIG. 13 is a partially broken side view of the power conversion system installed on the wall. FIG. 14 is a perspective view of the state in which the same power conversion system is installed upright, as seen from the rear side.

(embodiment)
(1) Overview A wiring housing of the present embodiment and a power conversion system including the same will be described with reference to FIGS. 1 to 14. FIG. Each drawing described in the following embodiments is a schematic drawing, and the ratio of the size and thickness of each component in each drawing does not necessarily reflect the actual dimensional ratio. .

As shown in FIGS. 1 and 2, the wiring housing 7 of the present embodiment is attached to an electric device (power conversion system 100), and a wire electrically connected to the electric device (power conversion system 100). A housing case 70 for housing W1 is provided.

As shown in FIGS. 1 to 7, the storage case 70 includes a first member 4 having an opening 45 at the bottom in an installation state where the electrical equipment (power conversion system 100) is installed at the installation location, and the first member 4 and a second member 5 combined with the first member 4 so as to close the opening 45 of the.

In a state in which the first member 4 and the second member 5 are combined, the housing case 70 is formed with a wire introduction port 43 into which the wire W1 can be inserted from the outside.

Between the first member 4 and the second member 5, a lid member 6 for closing the wire inlet 43 can be attached.

The first member 4 has a fitting structure 47 with which the outer peripheral portion of the lid member 6 is fitted.

The second member 5 has a water receiving portion 50 . The water receiving portion 50 is arranged below the fitting structure 47 in the installed state, and is configured to collect water that falls.

In the following embodiments, a case will be described in which the electrical equipment is a power conversion system 100 that converts, for example, a DC voltage output from a photovoltaic module 201 (see FIG. 8) into an AC voltage. The power conversion system 100 is installed indoors or outdoors for use. The device main body 1 of the power conversion system 100 is fixed to a wall 300 of a facility such as a house as shown in FIGS. In some cases, it is used by being fixed to a frame or the like installed outdoors. In the case of outdoor installation, the power conversion system 100 is arranged, for example, under the solar cell panel, and as shown in FIGS. It is used with the main body 1 fixed. The power conversion system 100 is used with the Z-axis direction in FIG.

In the following description, the X-axis direction in FIG. 2 etc. is defined as the horizontal direction, the Y-axis direction as the front-rear direction (depth direction), and the Z-axis direction as the vertical direction. Further, the positive direction of the X-axis direction is defined as the right side, the positive direction of the Y-axis direction is defined as the front side, and the positive direction of the Z-axis direction is defined as the upper side. Here, the installation location of the electrical equipment (power conversion system 100) is, for example, the wall 300 of the building or a frame provided outdoors. Axial direction is negative. However, these directions are examples, and are not meant to limit the directions during use of the power conversion system 100 . In addition, the arrows indicating each direction in the drawings are only shown for explanation and are not substantial.

As described above, the housing case 70 that houses the wires W1 includes the first member 4 and the second member 5 . A housing case 70 in which the first member 4 and the second member 5 are combined is formed with a wire inlet 43 into which the wire W1 can be inserted from the outside (rear side in this embodiment). When the wire inlet 43 is not used, the lid member 6 is attached between the first member 4 and the second member 5. There is a possibility that water will enter the inside of the housing case 70 through the gap between the housing 6 . Here, when water that has entered the interior of the storage case 70 from the gap between the first member 4 and the lid member 6 falls along the lid member 6, the water that has fallen along the lid member 6 is is accumulated in As a result, it becomes difficult for water to enter the inside of the second member 5 where the water receiving portion 50 is provided (that is, the side opposite to the wire introduction port 43 connected to the outside). can be provided.

Further, the wiring housing 7 of the present embodiment is provided, for example, in a power conversion system 100, which is a type of electrical equipment. The power conversion system 100 includes a device body 1 that houses a power conversion circuit 101 (see FIG. 8) that performs power conversion, and a wiring housing 7 . A storage case 70 included in the wiring housing 7 is attached to the device main body 1 . The housing case 70 houses electric wires W<b>1 that electrically connect an external circuit (for example, a circuit such as the photovoltaic module 201 , the storage battery unit 206 or the distribution board 203 ) and the power conversion circuit 101 .

Thus, the power conversion system 100 includes the wiring housing 7, and the wires W1 that electrically connect the external circuit and the power conversion circuit 101 are accommodated in the wiring housing 7. FIG. Here, the lid member 6 is attached between the first member 4 and the second member 5 when the wire introduction port 43 of the housing case 70 is not used. To provide a power conversion system 100 capable of suppressing entry of water into a storage case 70 because a second member 5 is provided with a water receiving part 50 for storing water falling along a lid member 6.例文帳に追加be able to.

(2) Details (2.1) Configuration Hereinafter, the wiring housing 7 according to the present embodiment and the power conversion system 100 including the same will be described in detail with reference to FIGS. 1 to 14. FIG. In the present embodiment, a case where the electric device to which the wiring housing 7 is attached is the power conversion system 100 will be described as an example, but the electric device to which the wiring housing 7 is attached is not limited to the power conversion system 100 . The electrical equipment to which the wiring housing 7 is attached may be, for example, a power receiving device installed outdoors, or various wiring devices.

Here, a power supply system 200 including the power conversion system 100 will be described with reference to FIG.

The power supply system 200 includes one or more (eg, two in the illustrated example) photovoltaic modules 201 , a power conversion system 100 , a remote controller 202 , and a distribution board 203 . The power conversion system 100 includes electric circuits such as a DC-DC converter and a DC-AC converter, and converts DC power output from the photovoltaic module 201 into AC power. The power conversion system 100 outputs AC power to the distribution board 203 and supplies the AC power to the load devices 205 via the distribution board 203 . The load device 205 is, for example, a lighting fixture, an air conditioner, or a television set used in a facility. Surplus AC power that is not used by the load device 205 among the AC power output by the power conversion system 100 can be reversely flowed to the commercial AC power supply 204 . The power conversion system 100 is electrically connected to a remote controller 202, and the remote controller 202 can be used to set driving conditions for the power conversion system 100, check the power generation amount of the photovoltaic power generation module 201, and the like. configured to allow

The power conversion system 100 may charge the storage battery unit 206 with the DC power output from the photovoltaic module 201 , convert the DC power discharged from the storage battery unit 206 into AC power, and supply it to the distribution board 203 . may be output. Note that the power conversion system 100 is not limited to being combined with the photovoltaic power generation module 201, and may be a system that converts DC power generated by a power generation system such as a fuel cell system or a wind power generation system into AC power.

Below, the configuration of the power conversion system 100 will be described more specifically.

As shown in FIGS. 2, 10 and 13, the power conversion system 100 accommodates the circuit components 110 forming an electric circuit including the power conversion circuit 101 inside the device main body 1 . The power conversion circuit 101 includes circuits such as a DC-DC converter circuit and a DC-AC converter, for example.

The power conversion system 100 includes a device body 1 that accommodates electric circuits such as a power conversion circuit 101 . The device body 1 of the power conversion system 100 includes a case body 2 and a cover 3, as shown in FIGS.

The case body 2 is formed in a box shape having an opening 21 on the front surface by drawing a sheet metal such as aluminum or its alloy. The case body 2 includes a rectangular rear plate 22 , side plates 23 projecting forward from the entire circumference of the rear plate 22 , and outer flanges 24 projecting outward from the front ends of the side plates 23 . A circuit component 110 is housed in a housing space 20 surrounded by a rear plate 22 and a side plate 23 in the case body 2 . A resin cover 27 is arranged on the case body 2 to cover the front side of the circuit component 110 housed in the case body 2 . The resin cover 27 does not need to cover all the circuit components 110 housed in the case main body 2. The resin cover 27 is formed so as to expose the front surfaces of the circuit components having the display section and the circuit components having the operation section. 27 is formed.

The cover 3 is formed, for example, by drawing a sheet metal such as aluminum or its alloy. The cover 3 is attached to the case body 2 using screws or the like while covering the outer flange 24 of the case body 2 in order to block the opening 21 of the case body 2 . An annular packing 31 (see FIG. 13) is arranged on the outer flange 24, and the cover 3 is fixed to the case body 2 via the packing 31. Therefore, the space between the case body 2 and the cover 3 is It becomes difficult for foreign matter such as water or dust to enter the inside of the device main body 1 through the gap between the two.

Further, a through hole 25 is provided in the lower right portion of the rear portion of the case body 2 so as to extend between the lower portion of the side plate 23 and the rear plate 22 .

As shown in FIG. 13 , when the power conversion system 100 is attached to the wall 300 , the electric wire W1 inserted into the storage case 70 through the hole 301 of the wall 300 and the electric wire introduction port 43 passes through the through hole 25 to the case body 2 . is inserted into the accommodation space 20 of the Here, in the accommodation space 20, a terminal block 111 is accommodated above the through hole 25, and four switches 112 are accommodated on the left side of the terminal block 111 in a horizontal direction. is electrically connected to the wire W1. Therefore, when the power conversion system 100 is attached to the wall 300, the electric wire W1 can be concealed and wired so that it cannot be seen from the front side of the wall 300. FIG.

Also, as shown in FIGS. 2 and 14, when the power conversion system 100 is attached to a horizontal member 320 or the like of a frame installed outdoors, the conduit 310 attached to the hole in the bottom surface of the second member 5 is accommodated. A wire W1 is inserted inside the case 70 . The electric wire W1 is inserted into the housing space 20 of the case body 2 through the through hole 25 and electrically connected to the terminal block 111 or the switch 112 housed in the housing space 20, so that the conduit 310 is exposed. Exposed wiring can be performed in the state where

As shown in FIGS. 10 to 12, the rear plate 22 of the case body 2 has a hollow heat sink case 210 attached to the upper side of the through hole 25, and a heat sink 220 attached to the left side of the heat sink case 210. ing.

The heat sink case 210 is made of, for example, aluminum or an alloy thereof, and is shaped like a box with an open front surface. The rear plate 22 of the case body 2 is provided with a first through portion smaller than the front surface of the heat sink case 210 at a portion to which the heat sink case 210 is attached. The housing space 20 of the case main body 2 and the inside of the heat sink case 210 are connected to each other by the first through portion, and one or more circuit parts (for example, large parts such as a transformer and an AC reactor) are also provided inside the heat sink case 210. is accommodated.

In addition, the rear plate 22 of the case body 2 is provided with a second through portion where the heat sink 220 is attached, and the heat generating component included in the circuit component 110 is thermally coupled to the heat sink 220 through the second through portion. It is Here, a heat-generating component is a component whose heat generated during energization is greater than the heat that can be dissipated by the component, and the temperature of the component exceeds the rated temperature while the component is in use. It is a component that requires a heat dissipation measure such as a heat sink to prevent it from being damaged. Examples of such heat-generating parts include parts such as switching elements such as IPMs (Intelligent Power Modules) used in DC-DC converters or DC-AC converters, transformers, and reactors. An IPM is a semiconductor device incorporating a power device for controlling power and a drive circuit and protection circuit for the power device. The power element is, for example, a power MOSFET (Metal Oxide Semiconductor Field Effect Transistor) or an IGBT (Insulated Gate Bipolar Transistor).

One countersunk screw 11 (see FIGS. 11 and 12) for hooking the device main body 1 to the mounting member 8 is attached to each of the rear surfaces of the heat sink case 210 and the heat sink 220 . A fixing piece 12 and a fixing piece 13 having screw holes are provided on the upper and lower surfaces of the heat sink 220 (see FIGS. 11 and 12).

The apparatus main body 1 is attached to a wall 300 or a horizontal member 320 of a frame using an attachment member 8 . As shown in FIGS. 9 to 14, the mounting member 8 includes a back plate 81 fixed to a wall 300 or a horizontal member 320 of a frame by means of screws or the like, and protrudes forward from the left and right edges of the back plate 81, respectively. and a lower guard 83 projecting forward from the lower edge of the back plate 81. - 特許庁

The back plate 81 is provided with a plurality of holes 84 through which screws are passed for fixing to the wall 300 or the horizontal member 320 of the pedestal. The back plate 81 is fixed to the wall 300 or the horizontal member 320 of the pedestal using screws passed through the plurality of holes 84 respectively. The upper edge of the back plate 81 is provided with two hooking grooves 85 into which the threaded portions of the two countersunk screws 11 fixed to the rear surfaces of the heat sink case 210 and the heat sink 220 are respectively inserted. The back plate 81 is provided with a through hole 86 that communicates with the wire inlet 43 of the first member 4 .

When the screw portion of the countersunk screw 11 provided in the case body 2 is inserted into the hooking groove 85 , the head of the countersunk screw 11 is hooked on the peripheral portion of the hooking groove 85 , thereby attaching the case body 2 to the mounting member 8 . With the case main body 2 attached to the mounting member 8, the mounting screws passed through the round holes 87 (see FIG. 10) of the lower guard 83 are screwed into the screw holes of the fixed piece 13 arranged below the heat sink 220. , to fix the case body 2 to the mounting member 8 . When the case main body 2 is attached to the mounting member 8 , the side surfaces of the heat sink case 210 and the heat sink 220 are covered with the lateral guards 82 , and the lower surfaces of the heat sink case 210 and the heat sink 220 are covered with the lower guard 83 . Therefore, the lateral guard 82 and the lower guard 83 can reduce the possibility that the user will touch the heat sink/case 210 and the heat sink 220 which become hot. Since the lateral guard 82 and the lower guard 83 are integrally provided with the mounting member 8 for mounting the case body 2 on the wall 300 or the horizontal member 320 of the frame, the number of parts can be reduced. In addition, since the number of parts that need to be handled when installing or removing the device main body 1 is reduced, there is an advantage that workability is improved.

An upper guard 9 is fixed to the case main body 2 to cover the upper surfaces of the heat sink case 210 and the heat sink 220 . The upper guard 9 is fixed to the case body 2 by screwing the mounting screws through the round holes 91 (see FIGS. 10 and 11) of the upper guard 9 into the screw holes of the fixing piece 12 arranged on the upper part of the heat sink 220. be done. When the upper guard 9 is fixed to the case main body 2, the upper surfaces of the heat sink case 210 and the heat sink 220 are covered with the upper guard 9, so that the possibility of the user touching the upper surfaces of the heat sink case 210 and the heat sink 220 which are heated can be reduced. . The upper guard 9 is formed, for example, by covering the surface of a metal component with a resin material. Since the surface of the upper guard 9 is covered with a resin material, the permissible outer temperature of the heat sink case 210, the heat sink 220, etc. can be set higher than when the surface of the upper guard 9 is not covered with a resin material. .

In this embodiment, the above-described wiring housing 7 is attached to the case main body 2 over the lower outer peripheral surface (lower portion of the side plate 23 ) and the rear plate 22 in the installed state.

Here, the storage case 70 of the wiring housing 7 includes the first member 4 having openings in the lower portion, the front side portion, and the rear side portion in the installed state, and the second member 5 attached to the lower portion of the first member 4. and The first member 4 and the second member 5 are molded articles of synthetic resin such as polycarbonate. Further, the wiring housing 7 of this embodiment further includes a lid member 6 .

The first member 4 includes a tubular portion 41 that has openings on the front side, the rear side, and the lower side, respectively, and protrudes rearward from the rear surface 221 of the case body 2 , and on the lower side of the front end portion of the tubular portion 41 . and a U-shaped frame portion 42 integrally connected thereto. An opening 44 that communicates with the housing space 20 of the case main body 2 is provided in front portions of the tubular portion 41 and the frame portion 42 . The first member 4 is in a state in which the end surface of the opening 44 is in contact with the rear surface 221 of the case body 2 (the outer surface of the rear plate 22) and the outer peripheral surface of the case body 2 (the outer surface of the side plate 23). It is attached to the case body 2 using fastening members such as screws. Specifically, the first member 4 is configured such that the front end surface 411 of the cylindrical portion 41 is brought into contact with the peripheral portion of the through hole 25 in the rear plate 22 , and the frame portion is attached to the peripheral portion of the through hole 25 in the lower portion of the side plate 23 . 42 is attached to the case main body 2 with the upper end surface 421 of 42 in contact with the case body 2 .

As shown in FIGS. 1 and 13, the upper surface 412 of the tubular portion 41 of the first member 4 is inclined with respect to the front-rear direction in the installed state. Specifically, the upper surface 412 of the cylindrical portion 41 is inclined with respect to the front-rear direction so as to descend forward in the installed state. Here, the heat sink/case 210 is arranged on the upper side of the tubular portion 41, and the gap between the tubular portion 41 and the heat sink/case 210 is widened toward the front side in the vertical direction in the installed state. can be done. Therefore, while maintaining a wide opening area of the wire introduction port 43 provided in the tubular portion 41, the gap between the tubular portion 41 (the first member 4) and the heat sink/case 210 on the front side of the tubular portion 41 is increased. It can be expanded to improve ventilation. Therefore, the heat radiation performance can be improved while miniaturization is achieved as a whole.

At the rear end portion of the tubular portion 41 of the first member 4 , an opening portion surrounded by the left and right walls and the upper wall of the tubular portion 41 serves as the wire introduction port 43 . A fitting structure 47 is formed at the rear end portion of the tubular portion 41 of the first member 4 so that the outer peripheral portion of the cover member 6 is fitted to the outer peripheral portion of the wire inlet 43 . The fitting structure 47 is provided at the rear end portion of the inner surface of the cylindrical portion 41 and slightly inside the wire inlet 43 . The fitting structure 47 has a groove portion 471 into which the outer peripheral portion of the lid member 6 is inserted. The groove 471 is formed between the rear side wall 472 and the front side wall 473 . The groove portion 471 is provided continuously with the left and right inner side surfaces of the cylindrical portion 41 and the upper inner side surface of the cylindrical portion 41 . The lid member 6 is inserted into the fitting structure 47 of the tubular portion 41 from below the tubular portion 41 . At the rear end portion of the tubular portion 41 of the first member 4 , hooking claws 48 that are hooked on the protrusions 64 on the rear surface of the lid member 6 are provided near the lower ends of the left and right side walls 472 . The cylindrical portion 41 is formed in an inverted U shape when viewed from the rear, and when the left and right side walls 472 of the cylindrical portion 41 are expanded outward, an elastic force is generated that causes the side walls 472 to return inward. Using this elastic force, the hooking claw 48 can be held in a state of being hooked on the projection 64. - 特許庁Also, the first member 4 has an opening 45 at its lower portion in the installed state, and the second member 5 is attached to the first member 4 so as to block the opening 45 .

As shown in FIGS. 1 to 5 and 7, the second member 5 has a rectangular bottom plate portion 51 and a side plate portion 52 projecting upward from the peripheral portion of the bottom plate portion 51 in the installed state. are doing. Marking lines 511 for forming round holes for connecting electric conduits 310 are formed at a plurality of locations on the upper surface of the bottom plate portion 51 . A round hole is made in a part of the bottom plate portion 51 along the scribed line 511, and a wire tube 310 (see FIG. 2) is connected to the round hole, so that the wire W1 inserted into the wire tube 310 is placed in the storage case 70. can be introduced inside the Cylindrical boss portions 531 are provided on the left and right of the front portion of the bottom plate portion 51 and on the left and right of the rear portion of the bottom plate portion 51, respectively. is formed. Here, the first member 4 has two screw holes 461 (see FIG. 12) into which the mounting screws passed through the two rear through-holes 53 are respectively screwed in the portions corresponding to the two rear through-holes 53 respectively. ) are provided. Also, the first member 4 is provided with two through holes 462 for inserting mounting screws through the two front through holes 53 at portions corresponding to the two front through holes 53 respectively. Further, on the inner surface of the cylindrical portion 41 of the first member 4, two ribs 413 having holes for inserting mounting screws are provided on the left and right sides.

Further, the second member 5 is provided with the water receiving portion 50 described above. The water receiving part 50 is arranged below the fitting structure 47 of the first member 4 in the installed state, and is configured to collect water that falls. Specifically, the water receiving portion 50 has a space 56 for storing water between the first wall 54 and the second wall 55 . The first wall 54 is provided on the second member 5 inside (on the front side) of the wire inlet 43 . The second wall 55 is provided inside the first wall 54 in the second member 5 . The first wall 54 is formed inside the side plate portion 52 . The first wall 54 includes a lateral wall portion 541 provided substantially entirely in the left-right direction along the end portion (the rear portion of the side plate portion 52) of the second member 5 on the side of the wire inlet 43, and the lateral wall portion 541. A vertical wall portion 542 extending forward from the left end portion and the right end portion is provided. The first wall 54 is formed in a U shape by a horizontal wall portion 541 and left and right vertical wall portions 542 when viewed from above. The second wall 55 includes a horizontal wall portion 551 provided along the horizontal wall portion 541 of the first wall 54, and vertical wall portions 552 extending forward from the left end and right end of the horizontal wall portion 551, respectively. . The front ends of the vertical wall portions 542 and 552 are connected to a boss portion 531 provided on the bottom plate portion 51, and the fitting structure 47 is fitted in the space 56 surrounded by the first wall 54, the second wall 55, and the boss portion 531. It collects the water that falls from the That is, the water receiving portion 50 extends in the front-rear direction and extends inward from the wire inlet 43 along the inner surface of the first member 4 . The fitting structure 47 extends from the rear side wall 472 to the front side wall 473 in the front-rear direction. It is possible to reduce the possibility that the water that has entered inside through the gap and dropped will fall outside the water receiving part 50.例文帳に追加In addition, the water receiving portion 50 is further provided over the entire end portion (rear end portion) of the second member 5 where the wire inlet 43 is provided. Even if water that has entered from the vicinity of the center in the left-right direction of the fitting structure 47 falls along the inner surface of the lid member 6, the water that has fallen can be received by the water receiving portion 50, and the water will flow inside the storage case 70. of water can be suppressed.

Here, as shown in FIG. 1, in the installed state, the height H1 of the first wall 54 (more specifically, the lateral wall portion 541) is equal to the height H2 of the second wall 55 (more specifically, the lateral wall portion 551). is lower than Also, in the installed state, the height H3 of the lower edge portion 861 of the through hole 86 in the mounting member 8 is lower than the height H1 of the first wall 54 (more specifically, the lateral wall portion 541). A packing 90 may be arranged between the wiring housing 7 and the mounting member 8 to surround the wire inlet 43 . It prevents water from entering through gaps. However, the packing 90 is not an essential component and can be omitted as appropriate.

In addition, in the bottom plate portion 51 of the second member 5, a plurality of (eg, six) drain holes 57 are provided between the first wall 54 and the second wall 55, respectively penetrating the bottom plate portion 51 in the vertical direction. is provided. That is, the second member 5 has at least one drain hole 57 for draining the water accumulated in the water receiving portion 50 to the outside. In addition, in the bottom plate portion 51, a plurality of (for example, six) drain holes 58 are provided in a portion between the rear side portion of the side plate portion 52 and the first wall 54, respectively penetrating the bottom plate portion 51 in the vertical direction. It is The drain holes 57 and 58 are sized so as to prevent dust or small insects from entering.

The lid member 6 is, for example, a molded article of synthetic resin such as polycarbonate. The lid member 6 has a main portion 60 formed in a substantially rectangular shape when viewed from the rear side, and side portions 62 protruding forward from the outer peripheral portion of the main portion 60 other than the lower side. A fitting portion 61 that fits with the fitting structure 47 of the first member 4 is formed in the lid member 6 at an outer peripheral portion other than the lower side of the main portion 60 . The fitting portion 61 has a first wall 611 that is the outer peripheral portion of the main portion 60 and a second wall 612 that protrudes outward from the outer surface of the side portion 62 . Here, in a state where the lid member 6 is attached to the first member 4, the first wall 611 of the lid member 6 is inserted into the groove portion 471 of the first member 4, and the gap between the first wall 611 and the second wall 612 is The side wall 473 on the front side of the first member 4 is inserted into the recessed groove formed at . As a result, when the lid member 6 is attached to the first member 4, the fitting structure 47 of the first member 4 having a U-shaped cross section and the fitting portion 61 having a U-shaped cross section of the lid member 6 are fitted. It will be in a combined state. When the fitting structure 47 and the fitting portion 61 are fitted together, the shape of the gap formed between the first member 4 and the lid member 6 is viewed from a direction perpendicular to the front-rear direction (horizontal direction or vertical direction). However, the labyrinthine (zigzag) shape has the advantage that it is difficult for water or the like to enter through the gap between the first member 4 and the lid member 6 .

The second wall 612 of the lid member 6 is provided with a projection 63 (see FIG. 6) projecting rearward from the vertical side portion extending along the vertical direction. In other words, the lid member 6 interferes with the first member 4 when the outer peripheral portion (first wall 611) of the lid member 6 is inserted into the groove 471 with the inner surface of the lid member 6 facing outward. An erroneous connection prevention structure (for example, a projection 63) is provided to prevent attachment to the first member 4 by doing so. When trying to insert the left and right outer peripheral portions of the lid member 6 into the grooves 471 of the first member 4 while the front and rear of the lid member 6 are turned upside down, the protrusions 63 interfere with the side walls 472, so that the lid member 6 is pointed backwards. can reduce the possibility of work errors. The shape of the erroneous connection prevention structure can be appropriately changed as long as it interferes with the first member 4 when the lid member 6 is attached in the opposite direction. Moreover, since the protrusion 63 protrudes from the vertical side portion of the second wall 612 in a direction orthogonal to the vertical side portion, the rigidity of the lid member 6 can be increased by the protrusion 63 . On the inner surface (front surface) of the main portion 60 of the lid member 6, characters WD1 (see FIG. 6) such as "inside" indicating the mounting direction of the lid member 6 are expressed by unevenness formed by resin molding. may

Further, the rear surface of the lid member 6 is provided with protrusions 64 with which the hooking claws 48 provided at the lower ends of the left and right side walls 472 are hooked when the lid member 6 is attached to the first member 4 .

Also, the lower portion of the lid member 6 is inserted into the gap between the side plate portion 52 of the second member 5 and the first wall 54 (specifically, the lateral wall portion 541). That is, the lower portion of the lid member 6 is arranged between the first wall 54 and the wire inlet 43 in the front-rear direction. A projection 65 projecting rearward is provided on the rear surface of the lid member 6 at a portion above the rear side portion of the side plate portion 52 . The projection 65 is provided on the rear surface of the lid member 6 along the left-right direction, covering substantially the entire left-right direction. The protrusion 65 is formed so that the amount of protrusion to the rear side increases toward the lower side, and the protrusion 65 is formed in a state in which the cover member 6 is attached between the first member 4 and the second member 5 . The lower end contacts the upper end of the rear wall portion of the side plate portion 52 . As a result, when the water hitting the rear surface of the lid member 6 from the outside flows down along the rear surface of the lid member 6, it is guided to the outside of the side plate portion 52 along the protrusions 65, so that the water flows along the rear surface of the lid member 6. It is possible to guide the water flowing down from the housing case 70 to the outside. When the lid member 6 is removed from the first member 4 for hidden wiring, after removing the second member 5 from the first member 4, the lid member 6 is pulled downward to separate the lid member from the first member 4. Remove 6. At this time, since the protrusion 65 can be used as a handle for pulling the cover member 6 downward, the operation of removing the cover member 6 can be easily performed.

In addition, on the peripheral portion of the front side surface of the main portion 60 (that is, the insertion portion of the lid member 6 that is inserted into the groove portion 471), the inner side surface (front surface) of the insertion portion is provided on the inner side surface (that is, the side wall of the groove portion 471). 473) are provided. When the lid member 6 is attached to the first member 4 , the rib 66 contacts the inner side surface of the groove 471 (the rear surface of the side wall 473 ) and is inserted into the outer side surface of the groove 471 (the front surface of the side wall 472 ). The outer surface at the site is pressed. As a result, the rear surface of the main portion 60 of the lid member 6 can be brought into close contact with the peripheral edge portion of the wire inlet 43 in the first member 4 , and the gap between the rear surface of the main portion 60 and the peripheral edge portion of the wire inlet 43 can be increased. Since gaps are less likely to form, entry of water or the like into the storage case 70 from the wire inlet 43 can be suppressed. In this embodiment, a plurality of ribs 66 are provided on the peripheral portion of the main portion 60 on the front side, but the number and arrangement of the ribs 66 can be changed as appropriate.

Here, the first member 4 contacts the rear plate 22 of the case main body 2 with the front end surface 411 and the lower part of the side plate 23 of the case main body 2 with the upper end surface 421 . It is fixed to the case main body 2 by screwing the mounting screw passed through the case main body 2 into the screw hole of the case main body 2 . In the second member 5, the mounting screw passed through the through hole 53 on the rear side is screwed into the screw hole 461 of the first member 4 and passed through the through hole 53 on the front side and the through hole 462 of the first member 4. The second member 5 is attached to the first member 4 by screwing attachment screws into the screw holes of the case body 2 . As a result, the wiring housing 7 is fixed to the case main body 2 while the lid member 6 is held between the first member 4 and the second member 5 .

(2.2) Installation Method An installation method for installing the power conversion system 100 (electrical equipment) of the present embodiment at an installation location will be described.

First, an installation method in which the power conversion system 100 is attached to the wall 300 and concealed wiring is performed will be described.

The case main body 2 accommodates circuit components 110 that form an electric circuit (power conversion circuit 101, etc.), and a heat sink case 210 and a heat sink 220 are preliminarily attached to the rear surface 221 of the case main body 2. do. Here, in the case of concealed wiring, the lid member 6 is previously removed from the storage case 70 of the wiring housing 7 .

First, the mounting member 8 is fixed with screws or the like to the wall 300 where the electrical equipment is installed (see FIG. 10). The wall 300 is provided with a hole 301 for passing the electric wire W1, and the mounting member 8 is fixed to the wall 300 so that the through hole 86 and the hole 301 of the wall 300 are connected.

When the mounting member 8 is fixed to the wall 300 , the case body 2 is lowered from above the mounting member 8 and the threaded portion of the countersunk head screw 11 is inserted into the hooking groove 85 to attach the case body 2 to the mounting member 8 . hook to Then, the case body 2 is fixed to the mounting member 8 by passing the mounting screw through the round hole 87 of the lower guard 83 of the mounting member 8 and screwing the mounting screw into the screw hole of the fixing piece 13 . In addition, the upper guard 9 is placed on the upper side of the case 210 and heat sink 220 that also serve as a heat sink, and the upper guard 9 is attached to the case body 2 by screwing the mounting screws passed through the round holes 91 of the upper guard 9 into the screw holes of the fixing piece 12 . fixed.

After that, as shown in FIG. 13, the electric wire W1 is inserted from the back side of the wall 300 through the hole 301, the through hole 86, and the electric wire introduction port 43 into the wiring housing 7, and the electric wire W1 is passed through the through hole 25 into the case. It is inserted inside the main body 2 . Then, by connecting the electric wire W1 to the circuit components 110 such as the terminal block 111 and the switch 112, the electric wire W1 from the outside is connected to the power conversion system 100 (electrical equipment) having the device main body 1.

When the device main body 1 of the power conversion system 100 is installed on the wall 300 , the packing 90 is arranged between the wiring housing 7 and the mounting member 8 and the packing 90 is arranged between the mounting member 8 and the wall 300 . This packing prevents water from entering the wiring housing 7 .

Next, a construction method in which the power conversion system 100 is attached to a frame installed outdoors or the like and exposed wiring is performed will be described.

In the case of outdoor installation, the mounting member 8 is fixed with screws or the like to a horizontal member 320 (see FIGS. 2 and 14) provided on a frame, for example.

When the mounting member 8 is fixed to the horizontal member 320, the case body 2 is lowered from above the mounting member 8 and the threaded portion of the countersunk screw 11 is inserted into the hooking groove 85, whereby the case body 2 is attached to the mounting member. Hook on 8. Then, the case body 2 is fixed to the mounting member 8 by passing the mounting screw through the round hole 87 of the lower guard 83 of the mounting member 8 and screwing the mounting screw into the screw hole of the fixing piece 13 . In addition, the upper guard 9 is placed on the upper side of the case 210 and heat sink 220 that also serve as a heat sink, and the upper guard 9 is attached to the case body 2 by screwing the mounting screws passed through the round holes 91 of the upper guard 9 into the screw holes of the fixing piece 12 . fixed.

After that, as shown in FIGS. 2 and 14, the electric wire W1 is passed through the electric conduit 310 fixed to the hole provided in the second member 5 and introduced into the wiring housing 7 . By inserting the electric wire W1 into the case body 2 from the through hole 25 and connecting the electric wire W1 to the circuit components 110 such as the terminal block 111 and the switch 112, the power conversion system 100 ( A wire W1 from the outside is connected to the electrical equipment).

When the device main body 1 of the power conversion system 100 is mounted on the pedestal, the rear surface of the mounting member 8 is exposed, and rainwater or the like from the outside may directly hit the lid member 6 that closes the wire inlet 43. Here, in the wiring housing 7 , the outer peripheral portion of the lid member 6 is inserted into the fitting structure 47 of the first member 4 . Specifically, the first wall 611 of the lid member 6 is inserted into the groove 471 of the fitting structure 47 . A side wall 473 inside (front side) of the groove portion 471 is inserted into a groove formed between the first wall 611 and the second wall 612 in the lid member 6 . Therefore, when the fitting structure 47 of the first member 4 and the fitting portion 61 of the lid member 6 are fitted together, the gap formed between the fitting structure 47 and the fitting portion 61 is labyrinth-shaped ( zigzag). As a result, even if water hitting the cover member 6 from the outside enters the gap between the fitting structure 47 and the fitting portion 61 , it stays in the labyrinthine gap, and the fitting structure 47 and the fitting portion 61 remain in the gap. It is possible to reduce the possibility of water entering further inside beyond the part where the is fitted. Here, the fitting structure 47 of the first member 4 and the lid member 6 are in direct contact, and a sealing member such as packing is arranged between the fitting structure 47 of the first member 4 and the lid member 6. Therefore, it is possible to reduce the number of parts and save the trouble of attaching the sealing member.

When water that has entered the gap between the fitting structure 47 and the fitting portion 61 drops downward, the water that has dropped accumulates in the water receiving portion 50 of the second member 5. It is possible to reduce the possibility of water entering further inside the wiring housing 7. Here, since the water receiving portion 50 extends inward along the left and right inner surfaces of the cylindrical portion 41 of the first member 4, the fitting structure 47 and the fitting portion 61 are fitted. It is possible to reduce the possibility that the water falling from the part falls outside the water receiving part 50. - 特許庁In addition, since the water receiving portion 50 is provided on the entire left-right direction at the rear end portion of the second member 5 (the end portion at which the wire introduction port 43 is provided), It is possible to reduce the possibility that water that has entered through the gap between the portion 61 and the fitting structure 47 will fall outside the water receiving portion 50 .

In addition, since the water accumulated in the water receiving portion 50 flows to the outside from the water drain hole 57 in the bottom portion of the water receiving portion 50, the water accumulated in the water receiving portion 50 flows over the water receiving portion 50 and is used for wiring. It is possible to reduce the possibility of further intrusion into the housing 7 . In addition, between the first wall 54 and the second wall 55 of the water receiving portion 50, the first wall 54 closer to the wire inlet 43 is lower than the second wall 55, so the water level of the water receiving portion 50 is rises over the first wall 54 and flows out over the first wall 54 . Here, when the packing 90 is attached between the wiring housing 7 and the mounting member 8 , the water that flows out from the water receiving portion 50 over the first wall 54 flows through the first wall 54 and the mounting member 8 . will accumulate between The bottom plate portion 51 of the second member 5 is provided with a drain hole 58 in a portion between the first wall 54 and the side plate portion 52, so that the water flows out from the water receiving portion 50 beyond the first wall 54. Water flows out through the drain holes 58 . Further, the height of the rear portion of the side plate portion 52 of the second member 5 and the height H3 of the lower edge portion 861 of the through hole 86 of the mounting member 8 are each lower than the height H1 of the first wall 54. It's becoming Therefore, when the level of water accumulated between the first wall 54 and the mounting member 8 exceeds the height of the lower edge portion 861, the water accumulated between the first wall 54 and the mounting member 8 penetrates. It will flow out from the hole 86 . As described above, the water accumulated in the water receiving portion 50 flows out from the water drain holes 57 and 58 or the through hole 86 of the mounting member 8, so that the water accumulated in the water receiving portion 50 flows further inside the storage case 70. can reduce the possibility of infiltration into Therefore, it is possible to realize the wiring housing 7 that can suppress the entry of water into the storage case 70 .

(3) Modifications The embodiment described above is merely one of various embodiments of the present disclosure. The above-described embodiment can be modified in various ways according to design and the like, as long as the object of the present disclosure can be achieved.

Modifications of the above embodiment are listed below. Modifications described below can be applied in combination as appropriate.

Although the case main body 2 and the first member 4 are formed separately in the above embodiment, the first member 4 may be provided integrally with the case main body 2 .

In the above embodiment, the fitting structure 47 of the first member 4 and the lid member 6 are in direct contact, but a sealing member such as a packing is provided between the fitting structure 47 of the first member 4 and the lid member 6. may be placed.

In the above embodiment, the case body 2 is formed by drawing, but the case body 2 may be formed by bending or welding a sheet metal.

(summary)
As described above, the wiring housing (7) of the first aspect is a housing for housing the electric wire (W1) attached to the electric device (100) and electrically connected to the electric device (100). A case (70) is provided. The storage case (70) includes a first member (4) having an opening (45) at the bottom in an installation state where the electric device (100) is installed at an installation location, and an opening (45) in the first member (4). a second member (5) combined with the first member (4) so as to occlude the . With the first member (4) and the second member (5) combined, the housing case (70) is formed with a wire inlet (43) into which the wire (W1) can be inserted from the outside. A lid member (6) can be attached between the first member (4) and the second member (5) to close the wire inlet (43). The first member (4) has a fitting structure (47) into which the outer peripheral portion of the lid member (6) is fitted. The second member (5) has a water receiving part (50) which is arranged below the fitting structure (47) in the installed state and collects falling water.

According to this aspect, when the water that has entered between the fitting structure (47) of the first member (4) and the lid member (6) from the outside of the storage case (70) drops, it falls into the water receiving part (50). be accumulated. Therefore, by accumulating water in the water receiving part (50), it is possible to suppress the intrusion of water beyond the water receiving part (50) to the inside, thereby suppressing the intrusion of water into the inside of the storage case (70). A possible wiring enclosure (7) can be provided.

In the wiring housing (7) of the second aspect, in the first aspect, the water receiving part (50) is provided for storing water between the first wall (54) and the second wall (55). It has a space (56). The first wall (54) is provided inside the wire inlet (43) in the second member (5). The second wall (55) is provided inside the first wall (54) in the second member (5).

According to this aspect, when water that has entered between the fitting structure (47) of the first member (4) and the lid member (6) drops from the outside of the storage case (70), the first wall (54) and the second wall (55). Therefore, it is possible to provide a wiring housing (7) capable of suppressing the intrusion of water into the storage case (70).

In the wiring housing (7) of the third aspect, in the second aspect, the lower portion of the lid member (6) is arranged between the first wall (54) and the wire inlet (43).

According to this aspect, water hitting the outer surface of the lid member (6) flows down between the first wall (54) and the wire inlet (43) along the outer surface of the lid member (6). , the intrusion of water into the housing case (70) can be suppressed.

In the wiring housing (7) of the fourth aspect, in the second or third aspect, in the installed state, the height (H1) of the first wall (54) is the height (H1) of the second wall (55) H2).

According to this aspect, when the level of water stored in the space (56) exceeds the height (H1) of the first wall (54), it flows outside beyond the first wall (54). Intrusion of water into the storage case (70) over the wall (55) can be suppressed.

In the wiring housing (7) of the fifth aspect, in any one of the first to fourth aspects, the second member (5) is a water-receiving member for flowing water accumulated in the water receiving part (50) to the outside. At least one vent (57) is provided.

According to this aspect, since the water accumulated in the water receiving part (50) flows out through the drain hole (57), it is possible to suppress the infiltration of water into the storage case (70).

In the wiring housing (7) of the sixth aspect, in any one of the first to fifth aspects, the water receiving part (50) extends inward along the inner surface of the first member (4) there is

According to this aspect, water that has entered between the fitting structure (47) of the first member (4) and the lid member (6) from the outside of the storage case (70) falls outside the water receiver (50). Since the possibility can be reduced, it is possible to suppress the intrusion of water into the interior of the storage case (70).

In the wiring housing (7) of the seventh aspect, in the sixth aspect, the water receiving part (50) extends over the entire end of the second member (5) where the wire inlet (43) is provided. are further provided.

According to this aspect, water that has entered between the fitting structure (47) of the first member (4) and the lid member (6) from the outside of the storage case (70) is reliably transported to the water receiver (50). Since the water can be stored, it is possible to prevent water from entering the storage case (70).

In the wiring housing (7) of the eighth aspect, in any one of the first to seventh aspects, the fitting structure (47) includes a groove (471) into which the outer peripheral portion of the lid member (6) is inserted. have

According to this aspect, since the outer peripheral portion of the lid member (6) is inserted into the groove (471), the storage case (70) can be opened from the gap between the lid member (6) and the first member (4). It becomes difficult for water to enter the inside, and it is possible to suppress the infiltration of water into the inside of the storage case (70).

In the case for wiring (7) of the ninth aspect, in the eighth aspect, the lid member (6) has a groove (471) on the inner side surface of the insertion site to be inserted into the groove (471). A rib (66) is provided that contacts the inboard side of the . The contact of the rib (66) with the inboard side surface of the groove (471) presses the outer side surface of the insertion site against the outboard side surface of the groove (471).

According to this aspect, by reducing the gap between the insertion portion of the lid member (6) and the outer side surface of the groove (471), water is prevented from entering the storage case (70). be able to.

In the case for wiring (7) of the tenth aspect, in the eighth or ninth aspect, the cover member (6) is provided with an incorrect connection prevention structure (63). The erroneous connection prevention structure (63) is such that when the outer peripheral portion of the lid member (6) is inserted into the groove (471) with the inner surface of the lid member (6) facing outward, the first member (4) prevents attachment to the first member (4) by interfering with the

According to this aspect, work mistakes can be reduced by suppressing erroneous connection of the lid member (6).

The wiring housing (7) of the eleventh aspect, in any one of the first to tenth aspects, further comprises a lid member (6).

According to this aspect, it is possible to suppress the intrusion of water into the storage case (70).

A power conversion system (100) of a twelfth aspect includes a device body (1) that houses a power conversion circuit (101) that performs power conversion, and a wiring housing (7) of any one of the first to eleventh aspects. ) and A storage case (70) included in the wiring housing (7) is attached to the apparatus main body (1). A housing case (70) houses a wire (W1) electrically connecting an external circuit and a power conversion circuit (101).

According to this aspect, when the water that has entered between the fitting structure (47) of the first member (4) and the lid member (6) from the outside of the storage case (70) drops, it falls into the water receiving part (50). be accumulated. Therefore, the electric power provided with the wiring housing (7) that can reduce the possibility of water entering beyond the water receiving part (50) and further inside, and can suppress the infiltration of water into the storage case (70) A conversion system (100) can be provided.

The configurations according to the second to eleventh aspects are not essential to the wiring housing (7) and can be omitted as appropriate.

1 device main body 4 first member 5 second member 6 lid member 7 wiring housing 43 wire inlet 45 opening 47 fitting structure 50 water receiving portion 54 first wall 55 second wall 56 space 57 drain hole 63 projection ( Incorrect connection prevention structure)
66 rib 70 housing case 100 power conversion system (electrical equipment)
101 power conversion circuit 471 groove W1 electric wire

Claims (12)

A housing case that houses electric wires that are attached to an electrical device and electrically connected to the electrical device,
The storage case includes a first member having an opening at a lower portion thereof in an installation state where the electric device is installed at an installation location, and a second member combined with the first member so as to close the opening of the first member. and
A wire introduction port into which the wire can be inserted from the outside is formed in the housing case in a state in which the first member and the second member are combined,
A lid member that closes the wire inlet can be attached between the first member and the second member,
The first member has a fitting structure in which an outer peripheral portion of the lid member is fitted,
The second member has a water receiving portion that is arranged below the fitting structure in the installed state and stores falling water.
Casing for wiring. The water receiving portion is located between a first wall provided at a portion inside the wire inlet and a second wall provided at a portion inside the first wall in the second member. , having a space for storing water,
The wiring housing according to claim 1. a lower portion of the lid member is disposed between the first wall and the wire inlet;
The wiring housing according to claim 2. In the installed state, the height of the first wall is lower than the height of the second wall.
The wiring housing according to claim 2 or 3. The second member has at least one drain hole for draining water accumulated in the water receiving portion to the outside.
The wiring housing according to any one of claims 1 to 4. the water receiver extends inward along the inner surface of the first member;
The wiring housing according to any one of claims 1 to 5. The water receiving portion is further provided over the entire end of the second member where the wire inlet is provided,
The wiring housing according to claim 6. The fitting structure has a groove into which the outer peripheral portion of the lid member is inserted,
The wiring housing according to any one of claims 1 to 7. An insertion portion of the lid member that is inserted into the groove is provided with a rib on an inner side surface of the insertion portion that contacts an inner side surface of the groove,
The outer surface of the insertion site is pressed against the outer side surface of the groove by the rib coming into contact with the inner side surface of the groove.
The housing for wiring according to claim 8. The lid member is attached to the first member by interfering with the first member when the outer peripheral portion of the lid member is inserted into the groove with the inner surface of the lid member facing outward. Incorrect connection prevention structure is provided to prevent
The wiring housing according to claim 8 or 9. further comprising the lid member;
The wiring housing according to any one of claims 1 to 10. a device body that houses a power conversion circuit that performs power conversion;
A wiring housing according to any one of claims 1 to 11,
the storage case included in the wiring housing is attached to the device main body,
The housing case houses the electric wire that electrically connects the external circuit and the power conversion circuit.
power conversion system.

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