JP7379001B2 - Drainage structure for housing - Google Patents

Description

The present invention relates to a drainage structure for a housing used in a power conditioner, a battery unit, etc.

Electrical equipment such as a power conditioner (hereinafter also simply referred to as a power conditioner) that converts direct current electricity to alternating current, a battery unit containing a plurality of storage batteries, and communication equipment are often housed inside a housing. If rainwater infiltrates the inside of the casing of such electrical equipment, there is a possibility that wiring may short out and cause a malfunction. Therefore, the housing of such electrical equipment is guaranteed to have a certain level of water-tightness. However, electrical system connections for connecting to the outside via electric wires or the like are often exposed or open to the outside, and it is necessary to take waterproof measures by sealing the area around them during construction. However, there may be cases where such sealing is not applied sufficiently during construction. Therefore, a housing for accommodating such electrical equipment is provided with, for example, a drainage structure provided on the bottom surface of the housing with a drain port that communicates between the inside and outside of the housing. The water that has entered the interior of the housing drips down the walls inside the housing and is drained from the drain port.

If such a case is outdoors, it may be directly exposed to rainwater, and if it is indoors, it may be exposed to unintentional water spray or drainage. Such rainwater, unintentional water discharge, drainage, etc. (hereinafter collectively referred to as rainwater, etc.) may splash up on the ground or floor, splash onto the bottom of the housing, and flow from below through the drain opening into the interior of the housing. There was a possibility of a backflow.

In addition, these casings are used for the IP test (International Protection test) for electrical machinery and equipment based on IEC 60529 and JIS C0920, which is a harmonized JIS standard of the same standard. In response to requests from organizations (such as protection rating tests, reliability evaluation tests, or environmental tests), it is necessary to take measures against backflow of water that flows from below into the housing through the drain outlet.

As a structure that communicates the inside and outside of the housing, for example, Patent Document 1 discloses that the door of the outdoor housing has a hollow double structure with a duct, the lower part of the duct opens to the outside of the housing, and the upper part of the duct opens to the outside of the housing. A structure is disclosed in which the upper part of the casing is communicated with the inside of the casing. For example, Patent Document 2 discloses that a recess is formed in the casing from the bottom to the top in the middle of a hole that passes through the casing and its installation base and communicates the inside and outside of the outdoor casing. A structure is disclosed in which a space closed by an installation stand is provided.

Japanese Patent Application Publication No. 2001-308554 Utility Model Publication No. 64-54375

Patent Document 1 and Patent Document 2 mentioned above relate to the structure of the breathing hole of the housing. The breathing hole is provided to prevent a pressure difference between the inside and outside of the casing due to the temperature difference between the outside air and the inside of the casing. Therefore, in Patent Document 1 and Patent Document 2, measures are taken to prevent rainwater etc. from dripping down the outer surface of the casing and forming a water film that blocks the breathing holes, and ensuring breathing function even under conditions where a large amount of rainwater etc. flows down the outer surface of the casing. Discloses measures to achieve this. However, the structure of the breathing hole disclosed in Patent Document 1 and Patent Document 2, which are conventional technologies, is a drainage structure for water that has entered the inside of the casing. No countermeasures have been taken for backflow water. Furthermore, the structure disclosed in Patent Document 1 and Patent Document 2 has a complicated configuration, and requires the creation of a mold specifically for that structure in manufacturing, and the need to change the mold when changing the structure. However, there were problems that required cost and time.

Therefore, the present invention provides a drainage structure for intruding water that has entered the interior of the housing, which has a simple configuration and takes measures against backflow water that flows from the bottom of the housing through the drain port and into the interior of the housing. The purpose of this invention is to provide a drainage structure for a housing.

As a result of various studies, the present inventors have found that the above object can be achieved by the following present invention.

That is, the housing drainage structure according to the present invention is
comprising a first plate material having a first hole, a second plate material having a cutout inside thereof communicating with the first hole, and a third plate material,
A casing in which the second plate material is sandwiched between the first plate material and the third plate material, and the first plate material, the second plate material, and the third plate material are laminated in the order from the bottom to the top. A drainage structure used in
The second plate material or the third plate material has a second hole that communicates the cutout portion with the inside of the casing,
Furthermore, the cutout portion has a cross-sectional area larger than the cross-sectional area of the first hole when viewed in the axial direction of the first hole, and has a cross-sectional area larger than the cross-sectional area of the second hole when viewed in the axial direction of the second hole. has a cross-sectional area larger than the cross-sectional area of .

According to this configuration, water such as rainwater that has entered the inside of the casing can be drained from the first hole corresponding to the drainage port, and the first plate, the second plate, and the third This can be realized with a simple configuration in which the plate materials of 2 are laminated as described above (Configuration 1). Further, since the second hole present in the second plate material or the third plate material communicates with the first hole present in the first plate material through the cutout, the intruding water moves in the direction of movement. On the other hand, the positions of the first hole and the second hole can be arranged so that they are not in a straight line (Configuration 2). With this structure, it is possible to reduce the force of backflow water when it flows back into the case from the bottom of the case through the first hole and the second hole, and it is possible to prevent backflow with a simple structure. be able to. Furthermore, due to the relationship between the dimensions of the cutout and the dimensions of the first hole and the second hole in terms of the cross-sectional area as described above, which is not disclosed in the prior art (configuration 3), the backflow water flowing back into the inside of the casing is prevented. The water force can be further reduced, and countermeasures against backflow can be enhanced with a simple configuration (the above configurations 1 to 3 are collectively referred to as the basic configuration).

The cutout of the second plate material has a labyrinth structure in which the liquid flowing from the first hole collides with the inner surface of the cutout at least once when reaching the second hole via the cutout. It is preferable to have. In addition to the basic configuration, by having this labyrinth structure, the force of backflow water can be reduced by the collision, and countermeasures against backflow can be further enhanced with a simple configuration.

In the configuration, the second plate member may have the second hole, and the casing may further include a wall plate with which the liquid flowing out from the second hole collides. According to this configuration, the liquid, which is intruding water such as rainwater flowing out from the second hole, collides with the wall plate, so that the force of the intruding water can be reduced, and the simple configuration is a countermeasure for preventing backflow. can be further increased.

In the basic configuration, it is preferable that the first plate is a part of an outer wall of the casing, and the third plate covers at least a part of the cutout of the second plate from above. . By using the first plate material also as part of the outer wall of the casing, a simpler configuration can be achieved. Further, by making the third plate material cover at least a part of the cutout portion of the second plate material from above, in addition to providing the second hole only in the second plate material, The second hole can also be provided in the third plate material, and the third plate material can serve as a lid, so that countermeasures against backflow can be further enhanced with a simple configuration.

In the basic configuration, it is preferable that the first plate is a support member that supports the casing, and the third plate covers at least a portion of the cutout of the second plate from above. . By using the first plate material also as a support member that supports the casing, a simpler configuration can be achieved. Further, by making the third plate material cover at least a part of the cutout portion of the second plate material from above, in addition to providing the second hole only in the second plate material, The second hole can also be provided in the third plate material, and the third plate material can serve as a lid, so that countermeasures against backflow can be further enhanced with a simple configuration.

In the casing drainage structure having the above configuration, a plurality of drainage channels are formed by one of the cutout portions, one of the first holes and one of the second holes that communicate with the cutout portion, and
In one of the drainage channels,
The first plate material is a part of the outer wall of the casing,
The second plate is a first mounting member to which an electrical component is attached,
The third plate material is a second mounting member to which an electrical component is attached,
In the other drainage channel,
The first plate material is a support member that supports the casing,
The second plate material is a part of the outer wall of the casing,
The third plate may be the first mounting member to which an electrical component is attached.
With this configuration, the plurality of drainage channels are arranged adjacently among the four plate members: the support member that supports the housing, a part of the outer wall of the housing, the first mounting member, and the second mounting member. It is constructed by overlapping three sheets of plate material, and shares a part of the outer wall of the housing and the first mounting member, so that even if there are a plurality of drainage channels, the construction can be simple.

The drainage structure for a housing according to the present invention is a drainage structure for intruding water that has entered the inside of the housing, and has a simple configuration to prevent backflow water that flows from the bottom of the housing back into the inside of the housing via the drain port. countermeasures can be taken.

BRIEF DESCRIPTION OF THE DRAWINGS It is an overall block diagram which shows an example of the system to which the housing|casing in which the drainage structure for housing|casings of this invention is used is connected. FIG. 1 is a longitudinal cross-sectional view of a casing in which the casing drainage structure according to the first embodiment of the present invention is used. FIG. 3 is a longitudinal cross-sectional view of the housing drainage structure according to the embodiment, with main parts of FIG. 2 enlarged. It is an exploded perspective view of the drainage structure for cases concerning the same embodiment. It is a top view of the drainage structure for housing|casings based on the same embodiment. FIG. 7 is a perspective view showing the internal structure of a casing in which a casing drainage structure according to a second embodiment of the present invention is used. FIG. 7 is an enlarged perspective view of the main part of FIG. 6; It is a top view of the drainage structure for housing|casings based on the same embodiment. 9 is a sectional view taken along line IX-IX in FIG. 8 and an enlarged view thereof. It is a perspective view of the drainage structure for cases concerning the same embodiment. It is a top view which shows the 1st attachment member before bending processing. FIG. 7 is a plan view of another housing drainage structure according to the same embodiment. 12 is a sectional view taken along the line XII-XII in FIG. 11 and an enlarged view thereof. FIG. 7 is a perspective view of another housing drainage structure according to the same embodiment.

Embodiments of the present invention will be described below based on the drawings. Note that the same reference numerals in each figure indicate the same or corresponding parts, and unless there is a special explanation of changes, the explanation will be omitted as appropriate.

FIG. 1 shows an example of a system connected to a casing in which a drainage structure (hereinafter also referred to as a casing drainage structure) according to the present invention is used. The casing is, for example, a casing for a power conditioner or a casing for a battery unit. The power conditioner housing and the battery unit housing are installed outdoors, for example. As shown in FIG. 1, DC power from the solar cell module SM installed on the roof of the house HS is transmitted to the battery unit (battery unit housing) 20 and the power distribution board DB via the power conditioner (power conditioner housing) 10. Ru. The power from the solar cell module SM and the battery unit 20 is converted into DC/AC by the power conditioner 10, and is transmitted to the electrical equipment EE inside the house HS via the power distribution board DB, and then back to the commercial power system PS via the power meter PM. The tide is flowing.

A drainage structure for a housing according to a first embodiment of the present invention will be described. In FIGS. 2 and 3, a case in which the case drainage structure is used will be described using a power conditioner case 10 as an example. The power conditioner case 10 in FIG. 2 includes a front wall plate 100, a rear wall plate 200, a top plate 300, a bottom plate 400, and left and right wall plates (not shown), which are the outer walls of the case. The interior 500 of is a closed space surrounded by the front wall plate 100, the rear wall plate 200, the top plate 300, the bottom plate 400, and the left and right wall plates. In the interior 500 of the power conditioner housing 10, a housing drainage structure 600 is configured in contact with the bottom plate 400. Intrusion water such as rainwater from the electrical system connection part (not shown) present at the upper part of the housing that hangs down from the housing drainage structure 600 through the wall plate 100 and the wall plate 200 inside the power conditioner housing 10 is prevented. Drained.

The drainage structure 600 for a housing according to the present embodiment shown in FIG. It consists of a second plate material 630 and a third plate material 650. The first hole 613 is, for example, perpendicular to the main surface of the first plate member 610 (including substantially orthogonal that can be considered to be substantially orthogonal). The second plate 630 is sandwiched between the first plate 610 and the third plate 650, and the first plate 610, second plate 630, and third plate 650 are stacked in this order from bottom to top. There is. Due to the structure sandwiched between the first plate material 610 and the third plate material 650, the third plate material 650 serves as a lid, so that the cutout portion 635 exists inside the housing drainage structure 600. It is a hollow part. In this way, the housing drainage structure 600 of this embodiment is realized by overlapping the three plates having the above-mentioned predetermined shape, and has a simple configuration.

The second plate 630 has a second hole 638 that communicates the cutout 635 with the inside 500 of the casing. In this embodiment, the second hole 638 extends in the horizontal direction (in the front-rear direction in FIG. 3). Note that the second hole may be formed in the third plate member 650. In this case, the second hole is perpendicular to the main surface of the third plate member 650, for example. The cutout portion 635 has a cross-sectional area larger than the cross-sectional area of the first hole 613 when viewed in the axial direction (in FIG. 3, viewed in the vertical direction). Further, the cutout portion 635 has a cross-sectional area larger than the cross-sectional area of the second hole 638 when viewed in the axial direction (in FIG. 3, viewed from the front and rear directions). Here, the axial direction of the first hole and the axial direction of the second hole refer to the longitudinal direction of each hole, the direction perpendicular to the radius of each hole, or the direction in which the rainwater, etc. moves in each hole. , each cross-sectional area is the area of a cross-section perpendicular to each axis. Due to the relationship between the dimensions of the cutout 635 and the first hole 613, and the relationship between the dimensions of the cutout 635 and the second hole 638, backflow water is prevented from flowing into the cutout 635, which is the hollow portion. The first hole 613 serving as an inlet and the second hole 638 serving as an outlet for backflow water are designed to be narrow. A backflow prevention function that reduces the force of backflow water (liquid 690 such as rainwater) flowing back to 500 can be exhibited.

The housing drainage structure 600 has a plurality of first holes 613, cutouts 635, and second holes 638 in a set of first plate material 610, second plate material 630, and third plate material 650. , may have multiple drainage points. In this embodiment, the housing drainage structure 600 has two first holes 613A, 613B, two cutouts 635A, 635B, and two second holes 638A, 638B, as shown in FIG. , has two drainage points AA and BB. The first hole 613A and the second hole 638A communicate with the cutout 635A, and the first hole 613B and the second hole 638B communicate with the cutout 635B. The reason why there are two drainage points AA and BB is that, for example, even if the power conditioner housing 10 is installed at an angle with respect to the front-rear direction, one of the two drainage points A and B can perform the drainage function. This is because it becomes possible to have.

Furthermore, specifically, in the drainage structure 600 for a housing according to the present embodiment, the cutout portion 635 of the second plate member 630 is formed so that the drain opening (the first hole 613 ) has a labyrinth structure for reducing the force of backflow water flowing back into the housing interior 500 through the casing. FIG. 4 shows an exploded perspective view of the housing drainage structure 600 according to the same embodiment, and FIG. 5 shows a plan view of the housing drainage structure 600 according to the same embodiment. As shown in FIG. 4, the third plate material 650 and the second plate material 630 are connected to the first plate material 610 (400) by passing members (not shown) such as screws and rivets into the three screw holes ND. Fixed against. As shown in FIG. 5, the labyrinth structure 636 allows the liquid 639 such as rainwater that has flowed in from the first hole 613 to pass through the cutout 635 and reach the second hole 638 at least once. It has a function of colliding with the inner surface 635w (635wa, 635wb) of the cutout portion 635. By having this labyrinth structure 636, the drainage structure 600 for the housing according to the present embodiment reduces the force of the backflow water due to the collision, and has a simple configuration, and has a first drain opening from the bottom of the housing 10. Measures to prevent backflow can be further enhanced against backflow water (liquid 639 such as rainwater) flowing back into the interior 500 of the housing 10 through the hole 613. Note that the shape, dimensions, etc. of the labyrinth structure are not limited to those shown in FIGS. 4 and 5 as long as it has the above function.

In this embodiment, the housing 10 includes a wall plate against which liquid 639 such as rainwater that has flowed out from the second hole 638 via the labyrinth structure 636 (cutout portion 635) collides with the wall plate. In this embodiment, these wall plates are the front wall plate 100 and the rear wall plate 200, which are present in the direction in which the liquid 639 flows backward. When the liquid 639 flowing backward from the second hole 638 collides with the wall plate 100.200, the water force of the liquid 639 flowing backward can be reduced, and a countermeasure for preventing the backward flowing water can be taken with a simple configuration. It can be further increased.

Next, a drainage structure for a housing according to a second embodiment of the present invention will be described. In FIG. 6, a case in which the case drainage structure is used will be described using a battery unit case 20 as an example. The battery unit housing 20 is surrounded by an outer wall OW (only the upper right part is shown in FIG. 6) on the top and bottom, front, back, left and right, and a plurality of long batteries BT occupying most of the interior (in FIG. 6, indicated by double dashed lines). A control section area 510 is located above the battery section 530 and houses a control device (not shown) that controls each battery. and a lower region 540 near a bottom plate 750 where a housing drainage structure 700 (described later) according to the present embodiment is configured. Note that an electrical system connection section 520 for connecting to the outside via electric wires or the like is provided on the outer wall of the rear surface of the control section region 510.

FIG. 7 shows an enlarged perspective view of the lower region 540, which is the main part of FIG. 6. An outline of the configuration of the lower region 540 will be described. The lower region 540 includes a bottom plate 750 that is a part of the outer wall OW of the housing 20, a first mounting member 770 to which the front side of an electrical component (not shown) such as a battery or an electronic circuit board is attached, and a first mounting member 770 that is attached to the front side of the electrical component (not shown) such as a battery or an electronic circuit board. It includes a second mounting member 780 to which the rear side of the product is attached, and a leg portion 710 and a bracket 720 that are supporting members that support the casing 20. The first attachment member 770 is attached to the upper surface of the bottom plate 750, and the second attachment member 780 is attached to the rear upper surface of the first attachment member 770. Legs 710 are attached to bottom plate 750 via brackets 720. Electrical system connections hanging down from the housing drainage structures 700, 700A configured in the lower area 540 of the battery unit housing 20 in FIG. 6 along the wall board inside the battery unit housing 20 (lower area 540, etc.) Rainwater and the like from the section 520 is drained through a drainage path 792 (FIG. 9) or a drainage path 794 (FIG. 12). The configuration of this lower region 540 will be explained in detail using an example and drawings.

FIG. 8 shows a plan view of the lower region 540 including the housing drainage structure 700 according to the present embodiment, and FIG. 9 shows a cross-sectional view taken along line IX-IX in FIG. 8 including the housing drainage structure 700 and its enlarged view. Show the diagram. Further, FIG. 10A shows a perspective view from the right rear of the housing drainage structure 700 according to the present embodiment, and FIG. 10B shows a plan view of the first mounting member before bending. The housing drainage structure 700 of this embodiment mainly drains rainwater and the like dripping down the inner surface of the rear outer wall and the like of the battery unit housing 20. The housing drainage structure 700 includes a bottom plate 750 whose periphery is bent downward at a right angle into an L shape, a first mounting member 770 whose periphery is bent upward at a right angle at two points in a U shape, and an L-shaped bottom plate 750. and a second mounting member 780 bent upward at a right angle. The bottom plate 750, the first mounting member 770, and the second mounting member 780 each have a first plate member having a first hole 752 in the present invention, and a cutout portion 772 communicating with the first hole 752 inside. This is a third plate material that covers at least a portion (in this example, all) of the cutout portion 772 of the first mounting member 770 from above. The first hole 752 is, for example, perpendicular to the horizontal main surface of the bottom plate 750. The first mounting member 770 is sandwiched between the bottom plate 750 and the second mounting member 780, and the bottom plate 750, the first mounting member 770, and the second mounting member 780 are stacked in this order from bottom to top. Due to the structure sandwiched between the bottom plate 750 and the second mounting member 780, the second mounting member 780 serves as a lid, so that the cutout portion 772 exists inside the housing drainage structure 700. It is a hollow part. In this way, the housing drainage structure 700 of this embodiment is realized by overlapping the three plates having the above-mentioned predetermined shape, and has a simple structure.

The first mounting member 770, which is the second plate material, has a second hole 774 that communicates the cutout portion 772 with the lower region 540, which is the interior of the casing. In this embodiment, the second hole 774 extends in the horizontal direction (in the front-rear direction in FIG. 9). Note that the second hole may be formed in the second mounting member 780. In this case, the second hole is perpendicular to the main surface of the second attachment member 780, for example. The cutout portion 772 has a cross-sectional area larger than the cross-sectional area of the first hole 752 when viewed in the axial direction (in FIG. 9, viewed in the vertical direction). Further, the cutout portion 772 has a cross-sectional area larger than the cross-sectional area of the second hole 774 when viewed in the axial direction (in FIG. 9, viewed from the front and rear directions). Due to the relationship between the dimensions of the cutout 772 and the first hole 752 and the relationship between the dimensions of the cutout 772 and the second hole 774, the drain port (first The force of the backflow water (in the opposite direction of the drainage path 792) flowing back into the lower region 540 inside the housing 20 through the hole 752) is reduced, and a backflow prevention function against the backflow water is exhibited.

As shown in FIG. 10A, the cutout portion 772 and the second hole 774 are punch holes 776 provided in the L-shaped bent portion of the first attachment member 770. The punch hole 776 is formed by punching out two ovals or ellipses (hereinafter simply referred to as ellipses) having different dimensions so that they overlap. As shown in FIG. 10B, these two ellipses are formed by, for example, making each major axis parallel to the front-rear direction and making each minor axis have a different length, so that some of the ellipses are partially parallel to each other in the major axis direction. The shapes overlap each other. The cutout portion 772 and the second hole 774 can be easily formed by bending the first mounting member 770 at right angles at the elliptical portion where the short axis of the two stacked ellipses is short.

FIG. 11 shows a plan view of a lower region 540 (battery unit casing 20) including another example of the housing drainage structure 700A according to the present embodiment, and FIG. 12 shows a plan view including the housing drainage structure 700A. 11 and an enlarged view thereof, and FIG. 13 shows a perspective view from the rear left of another example of the housing drainage structure 700A according to the present embodiment. The housing drainage structure 700A includes a bracket 720 that is a supporting member that supports the housing 20 and is bent downward at right angles in two places in a U shape, and a bracket 720 that is a support member that supports the housing 20 and is bent downward at right angles in an L shape at the periphery as described above. It consists of a bottom plate 750 that is bent upward, and a first mounting member 770 that is bent upward at right angles at two places in a U-shape. The bracket 720, the bottom plate 750, and the first mounting member 770 each include a first plate material having a first hole 722 in the present invention, and a second plate material having a cutout portion 754 communicating with the first hole 722 therein. This is a third plate material that covers at least a portion of the cutout portion 754 of the bottom plate 750 from above. The first hole 722 is, for example, perpendicular to the main surface of the bracket 720 in the horizontal direction. The bottom plate 750 is sandwiched between the bracket 720 and the first mounting member 770, and the bracket 720, the bottom plate 750, and the first mounting member 770 are stacked in this order from bottom to top. In the structure sandwiched between the bracket 720 and the first mounting member 770, the first mounting member 770 has a structure that covers at least a portion of the cutout portion 754 from above, so that the cutout portion 754 functions as a lid. 754 is a hollow portion existing inside the housing drainage structure 700A. In addition, in this embodiment, the other part of the cutout part 754 that is not covered from above by the first mounting member 770 is a second hole 778 (described later) that is present in the first mounting member 770, which is a third plate material. are communicating. In this way, the housing drainage structure 700A of the present embodiment is realized by overlapping the three plates having the above-mentioned predetermined shape, and has a simple configuration.

The first mounting member 770, which is the third plate material, has a second hole 778 that communicates the cutout portion 754 with the lower region 540, which is the interior of the casing. In this embodiment, the second hole 778 extends in the vertical direction (in the vertical direction in FIG. 12). Here, the second hole 778 is a part of a punch hole 779 (described later) which is a cutout portion, and refers to a portion of the punch hole 779 that overlaps with the cutout portion 754 when viewed in the vertical direction. Note that the second hole 778 may be formed in the bottom plate 750, which is the second plate material. In this case, the second hole in the bottom plate 750 is, for example, parallel to the horizontal main surface of the bracket 720 or the first mounting member 770, and is continuous with the second hole in the vertical direction in the first mounting member 770. This communicates with the lower region 540. The cutout portion 754 has a cross-sectional area larger than the cross-sectional area of the first hole 722 when viewed in the axial direction (in FIG. 12, viewed in the vertical direction). Further, the cutout portion 754 has a cross-sectional area larger than the cross-sectional area of the second hole 778 (part of the punch hole 779) when viewed in the axial direction (in FIG. 12, viewed in the vertical direction). Due to the relationship between the dimensions of the cutout 754 and the first hole 722 and the relationship between the dimensions of the cutout 754 and the second hole 778, the drain port (first The force of the backflow water (in the opposite direction of the drainage path 794) flowing back into the lower region 540 inside the housing 20 through the hole 722) is reduced, and a backflow prevention function against backflow water is exhibited.

As shown in FIG. 13, a cutout 754 provided in the bottom plate 750 and a punch hole 776 provided in the L-shaped bent portion of the first mounting member 770 are similar to the example shown in FIG. 10B. The bottom plate 750 and the first mounting member 770, which are one flat plate, are each formed by punching into an oblong or elliptical shape.

The housing drainage structure 700 and the housing drainage structure 700A according to the present embodiment each have one cutout 772, one first hole 752 and one second hole 774 communicating with this, and , a plurality of (four in FIG. 11) drainage channels are formed by one cutout 754, one first hole 722 and one second hole 778 that communicate with the cutout. The housing drainage structure 700 and the housing drainage structure 700A are formed by overlapping any three laminated plate materials among the bracket 720, the bottom plate 750, the first mounting member 770, and the second mounting member 780. Since the bottom plate 750 and the first mounting member 770 are shared, even if there are a plurality of drainage channels, the structure can be simple.

As shown in FIGS. 7 and 8, two drainage structures 700 for the housing are provided on the left and right sides of the rear, and as shown in FIGS. 7 and 11, the drainage structure 700A for the housing is located near the center. There are four on the front, back, left and right. The reason why a plurality of drainage channels etc. are provided in this way is that, for example, when the battery unit housing 20 is installed at an angle with respect to the front-rear direction and/or the left-right direction, one of these housing drainage channels is installed. This is because the structures 700 and 700A can have a drainage function.

The present invention is not limited to the above-described embodiments, and various additions, changes, or deletions can be made without departing from the gist of the present invention. Therefore, such materials are also included within the scope of the present invention. For example, the battery unit housing 20 may be provided with the housing drainage structure 600, and the power conditioner housing 10 may be provided with the housing drainage structure 700 or the housing drainage structure 700A. Further, in the battery unit housing 20, the positions of the housing drainage structure 700 and the housing drainage structure 700A described in the second embodiment may be switched. In addition, the housing drainage structure 700 and the housing drainage structure 700A can be configured of three laminated plate materials, which are arbitrary plate materials included in the housing. Furthermore, the housing drainage structures 600, 700, and 700A may be formed in the housing of electrical equipment other than the power conditioner and the battery unit. In the above embodiment, for example, the first plate material, the second plate material, and the third plate material may be made of a metal obtained by subjecting a steel plate to a rust prevention treatment such as galvanizing, thereby reducing costs. can be achieved. Further, for example, the material of the second plate material and the third plate material in the first embodiment may be carbon fiber having a predetermined strength, or resin such as engineering plastic such as PBT resin or PPS resin.

10 Power conditioner case 20 Battery unit case 100,200 Wall plate (with which the liquid flowing out from the second hole collides) 100,200,300,400,OW Outer wall (of the case) 400,610,720,750 1st plate 613, 613A, 613B, 722, 752 1st hole 635, 635A, 635B, 754, 772 Cutout part 630, 750, 770 2nd plate 650, 770, 780 3rd plate 638, 638A, 638B , 774, 778 Second hole 635w, 635wa, 635wb Inner surface (of the cutout) 636, 636A, 636B Labyrinth structure 710, 720 Support member 770 First mounting member 780 Second mounting member

Claims (3)

comprising a first plate material having a first hole, a second plate material having a cutout inside thereof communicating with the first hole, and a third plate material,
A casing in which the second plate material is sandwiched between the first plate material and the third plate material, and the first plate material, the second plate material, and the third plate material are laminated in the order from the bottom to the top. A drainage structure used in
The second plate material or the third plate material has a second hole that communicates the cutout portion with the inside of the casing,
Furthermore, the cutout portion has a cross-sectional area larger than the cross-sectional area of the first hole when viewed in the axial direction of the first hole, and has a cross-sectional area larger than the cross-sectional area of the second hole when viewed in the axial direction of the second hole. has a cross-sectional area larger than the cross-sectional area of
The cutout of the second plate material has a labyrinth structure in which the liquid flowing from the first hole collides with the inner surface of the cutout at least once when reaching the second hole via the cutout. have,
Drainage structure for the housing. In the housing drainage structure according to claim 1 ,
The second plate material has the second hole, and further,
The casing includes a wall plate with which the liquid flowing out from the second hole collides.
Drainage structure for the housing. comprising a first plate material having a first hole, a second plate material having a cutout inside thereof communicating with the first hole, and a third plate material,
A casing in which the second plate material is sandwiched between the first plate material and the third plate material, and the first plate material, the second plate material, and the third plate material are laminated in the order from the bottom to the top. A drainage structure used in
The second plate material or the third plate material has a second hole that communicates the cutout portion with the inside of the casing,
Furthermore, the cutout portion has a cross-sectional area larger than the cross-sectional area of the first hole when viewed in the axial direction of the first hole, and has a cross-sectional area larger than the cross-sectional area of the second hole when viewed in the axial direction of the second hole. has a cross-sectional area larger than the cross-sectional area of
The first plate material is a part of an outer wall of the casing, or the first plate material is a support member that supports the casing,
the third plate material covers at least a portion of the cutout portion of the second plate material from above;
A plurality of drainage channels are formed by one cutout, one first hole and one second hole communicating with the cutout,
In one of the drainage channels,
The first plate material is a part of the outer wall of the casing,
The second plate is a first mounting member to which an electrical component is attached,
The third plate material is a second mounting member to which an electrical component is attached,
In the other drainage channel,
The first plate material is a support member that supports the casing,
The second plate material is a part of the outer wall of the casing,
the third plate material is the first mounting member to which an electrical component is attached;
Drainage structure for the housing.

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