JP7497111B2 - Ventilation system for electrical equipment cabinets - Google Patents

Description

The present invention relates to a ventilation device for electrical equipment storage cabinets.

As described in Patent Document 1, the electrical equipment storage cabinet is provided with a ventilation device for releasing heat generated by the equipment stored inside to the outside. In order to ensure higher dustproofing performance, the ventilation device in Patent Document 1 discloses a technology for improving dustproofing performance by placing a packing member around the periphery of the filter and tightly attaching the filter to the case.

JP 2017-166707 A

However, because the filter and packing material are integrated, when replacing the filter during maintenance, the packing around the periphery must also be replaced at the same time, which increases costs. Also, because the packing around the periphery of the filter is used to seal the filter against the case, it can be difficult to replace the filter, especially from inside the cabinet.

The inventor of this case has thoroughly investigated this issue and attempted to solve it. The problem that this invention aims to solve is to create a ventilation device for electrical equipment storage cabinets that can fit a filter tightly to the case without using a filter with a packing.

To solve the above problem, a ventilation device for an electrical equipment storage cabinet is provided that includes a case with a filter storage section that opens on the front side and extends to the rear side, and an adapter that covers the upper and side edges of the filter storage section on the front side of the case.

It is also preferable to have an adapter attached so that a drainable gap is provided at the bottom of the filter storage section.

It is also preferable that the lower part of the adapter is provided with a movement restriction portion that is used to restrict the movement of the adapter relative to the case.

The present invention makes it possible to create a ventilation device for electrical equipment storage cabinets that can fit a filter tightly to the case without using a filter with a packing.

1 is a perspective view showing a part of an electrical equipment storage cabinet to which a ventilation device (louver) of an embodiment is attached. FIG. 2 is an exploded perspective view of the electrical equipment storage cabinet and the louvers shown in FIG. 1 . 3 is an exploded perspective view of the electrical equipment storage cabinet and the louvers, as viewed from a different direction than that of FIG. 2 . FIG. 2 is an exploded perspective view of the louver with the louver portion separated. FIG. 2 is a perspective view of the case as viewed from the front side. FIG. 2 is a perspective view of the case as viewed from the rear side. 7 is a cross-sectional view taken along line VII-VII of FIG. FIG. 2 is a diagram showing the state in which the adapter is attached to the case. FIG. 2 is an exploded perspective view of the louver portion disassembled into a main louver member and a sub-louver member. 2 is a cross-sectional view taken along the line XX in FIG. 1. 1. FIG. 1 is a cross-sectional view taken along the line XI-XI of FIG. This is a cross-sectional view taken along line XII-XII of FIG. 11 is an exploded perspective view showing a state in which a main body louver member has been removed from a louver attached to an electrical equipment storage cabinet. FIG.

The following describes an embodiment of the invention. As can be seen from Figs. 1 to 4, the ventilation device of this embodiment is a louver 1 for an electrical equipment storage cabinet, and includes a case 3 with a filter storage section 34 that opens on the front side and extends to the rear side, and an adapter 61 that covers the upper and side portions of the periphery of the filter storage section 34 on the front side of the case 3. This allows the ventilation device to be configured so that the filter 4 can be tightly attached to the case 3 without using a filter with a packing.

The case 3 of the embodiment stores the filter 4 and has a filter storage section 34 with a U-shaped cross section. As can be seen from Figs. 5 and 6, this filter storage section 34 extends to the rear side of the case 3 and has a front opening 41 that opens across the entire front side, and has an air vent 42 on the rear side that is narrower than the front opening 41. Around the air vent 42, there is a frame 43 that will be located on the rear side of the filter 4, and a side portion 44 that extends from the frame 43 to the front side.

The case 3 of the embodiment also includes a filter retaining portion 45 that crosses the frame portion 43. The filter retaining portion 45 is formed to protrude further toward the front side than the frame portion 43, and is designed to prevent the filter 4 from falling off from the filter storage portion 34. Since the filter 4 is unlikely to fall off from the filter storage portion 34, even if a ventilation fan is attached to the rear side of the ventilation device, the filter 4 can be prevented from being caught in the ventilation fan.

As can be seen from FIG. 7, the adapter 61 of the embodiment is installed on the front side of the case 3 equipped with the filter storage section 34 having a U-shaped cross section. This makes it possible to suppress the gap between the filter 4 provided in the filter storage section 34 and the filter storage section 34. This makes it possible to suppress the intrusion of large dust from the gap between the filter 4 and the filter storage section 34, and therefore makes it unnecessary to use a filter equipped with a packing on the periphery, and the filter 4 can be easily stored in the filter storage section 34 from the front opening 41. In addition, the filter 4 can be stored from the ventilation hole 42 side of the filter storage section 34 by bending the filter 4, and when a ventilation device is attached to the cabinet 8, the filter 4 can be replaced from both the outside and inside of the cabinet 8. In addition, the intrusion of water can also be suppressed.

The adapter 61 of the embodiment has a plate-like structure with a ventilation hole 62 near the center, which ensures the rigidity of the adapter 61 while ensuring ventilation from the center of the adapter 61. The adapter 61 is positioned between the sub-loobar member 22 (described later) and the filter 4, so that a space is created between the sub-loobar member 22 and the filter 4. This prevents water that has moved from the sub-loobar member 22 side to the filter 4 side from seeping into the filter 4. The adapter 61 shown in FIG. 2 has an auxiliary support portion 63 that extends in the vertical direction near the center of the ventilation hole 62 of the adapter 61. Although this auxiliary support portion 63 is not essential, providing the auxiliary support portion 63 can reduce the risk of the filter 4 falling off.

As can be seen from FIG. 8, the ventilation device of the embodiment is equipped with an adapter 61 so as to provide a drainable gap Sp at the bottom of the filter storage section 34. This allows water that has entered the filter 4 to be drained through the gap Sp. This prevents water from entering the ventilation device and seeping into the filter 4, causing it to overflow from the case 3 and flood the cabinet 8, improving the waterproof performance of the ventilation device.

In addition, the lower part of the adapter 61 in the example shown in FIG. 2 is provided with a movement restriction part used to restrict the movement of the adapter 61 relative to the case 3. In the example shown in FIG. 2, the movement restriction part is a through hole 65, and is configured so that the boss stud 39 provided on the case 3 can be inserted as shown in FIG. 4. If the adapter 61 is adjacent to the case 3 so that the boss stud 39 is inserted into this hole 65, the movement of the adapter 61 relative to the case 3 is restricted. If the movement of the adapter 61 relative to the case 3 can be restricted, it is not necessary to hold the adapter 61 by hand when assembling the ventilation device, and the assembly work becomes easier. In the embodiment, as can be understood from FIG. 7, by fixing the louver part 2 to the case 3, the adapter 61 is sandwiched between the louver part 2 and the case 3 and is firmly fixed.

As can be seen from FIG. 3, the adapter 61 of the embodiment is provided with a gasket 67 on the side facing the case 3. In other words, this gasket 67 is positioned so as to be sandwiched between the adapter 61 and the case 3. With this configuration, it is possible to more effectively prevent a decrease in dustproof performance caused by a gap occurring between the filter 4 and the filter storage section 34.

The adapter 61 is not essential for the ventilation device, so you can choose whether to install it or not depending on the level of dust-proofing required.

The ventilation device of this embodiment is a louver 1 for electrical equipment storage cabinets. As can be seen from Figs. 9 and 10, this louver 1 for electrical equipment storage cabinets is provided with a louver section 2 that is configured in two layers by combining a main louver member 21 with a plurality of overhanging portions 27 extending outwardly downward from a vertical surface and a sub-louver member 22 with a plurality of sub-overhanging portions 28 extending outwardly upwardly from a vertical surface toward the overhanging portion 27, and the sub-overhanging portion 28 located at the bottom of the sub-louver member 22 is provided with a drainage portion that serves as a path for draining infiltrated water. Note that the term "two-layered" as described here means that it does not mean that it is configured with three or more layers by adding other louver members. In this way, there are two louver members, the sub-overhanging portion 28 is configured to extend toward the overhanging portion 27, and a drainage portion is provided in the sub-overhanging portion 28 located at the bottom of the sub-louver member 22, so that it is possible to suppress the intrusion of water from the outside while maintaining breathability, and to make it easy to drain infiltrated water.

The louver 1 of the embodiment includes a case 3 that stores a filter 4, and a louver section 2. The louver section 2 includes a main louver member 21 that is exposed to the outside, and a sub louver member 22 that is located between the main louver member 21 and the case 3. As can be understood from FIG. 2 and FIG. 3, the main louver member 21 includes a plurality of protruding portions 27 that extend outwardly downward from the vertical surface, and includes a first locking portion 23 that locks to the case 3 at the upper part of the inner left and right side surfaces. The sub louver member 22 includes a plurality of secondary protruding portions 28 that extend outwardly upwardly from the vertical surface. The sub louver member 22 includes a second locking portion 24 that locks to the case 3 at the lower part of the left and right side surfaces. The sub louver member 22 also includes a first abutment portion 25 that is bent toward the case 3 over one side of the upper end. Furthermore, the louver member 22 includes a second abutment portion 26 that protrudes from the left and right side surfaces toward the main louver member 21. In this embodiment, the protruding portion 27 of the main louver member 21 is opened to form a passage that extends diagonally downward toward the outside of the louver 1, and the secondary protruding portion 28 of the sub louver member 22 is opened to form a passage that extends diagonally upward toward the main louver member 21.

In order to ensure smooth ventilation between the overhanging portion 27 and the sub-overhanging portion 28, it is preferable to configure the lower end of the opening of the sub-overhanging portion 28, i.e., the tip of the sub-overhanging portion 28, to be located within the range of the height of the vertical opening Sv of the overhanging portion 27 located on the front side. If the lower end of the opening of the sub-overhanging portion 28 is located at a position higher than the lower end of the height of the vertical opening Sv of the overhanging portion 27 located on the front side and lower than the upper end, it is possible to ensure easy ventilation between the overhanging portion 27 and the sub-overhanging portion 28 while allowing some of the water that has entered from the overhanging portion 27 to hit the sub-overhanging portion 28. By hitting the sub-overhanging portion 28, the momentum of the water that has entered from the overhanging portion 27 is weakened, so that the water can be prevented from moving toward the filter 4. In the example shown in FIG. 10, the lower end of the opening of the sub-overhanging portion 28 is configured to be located near the center position of the height of the vertical opening Sv, which is the entrance and exit of the overhanging portion 27 located on the front side.

It is also preferable that the tip of the secondary projection 28 be adjacent to the vertical opening Sv of the opposing projection 27. In this way, even if the main louver member 21 and the sub louver member 22 are combined to form a two-layer structure, the horizontal thickness can be reduced.

The sub-louver member 22 of this embodiment has a drainage section in the secondary extension 28 located at the bottom. This drainage section serves as a path for draining water that has infiltrated inside the louver section 2, and is configured by partially cutting out the secondary extension 28, etc.

It is also desirable to cut out a portion of the horizontal surface 51 located below the secondary extension 28 of the sub-louver member 22, providing a drainage section. Even if water falls from the secondary extension 28 onto the horizontal surface 51 that extends horizontally, the water can be drained downward from the drainage section provided on the horizontal surface 51 into the drainage hole 18 provided at the lower end of the louver 1. Drainage is also possible with a structure in which the main louver member 21 and the sub-louver member 22 are fastened together.

It is also desirable to cut out a portion of the vertical surface 52 located below the secondary extension 28 of the sub-loobar member 22 to provide a drainage section. Because water can move beyond the space partitioned by the sub-loobar member 22, if water accumulates on one side of the space partitioned by the sub-loobar member 22, some of the water can be moved to the space on the other side.

In the example shown in Figures 9 to 12, the secondary extension 28 is provided with a drainage section that spans the vertical and horizontal surfaces, eliminating the need to provide separate openings for the drainage section on the secondary extension 28, the vertical and horizontal surfaces. In this example, only one drainage section is provided in the center of the sub-lobar member 22 in the left-right direction, but it is not necessary to limit the drainage section to being provided in the center of the secondary extension 28 in the left-right direction, and multiple drainage sections may be provided on the secondary extension 28.

The drainage section does not have to be provided only at this position, and in the example shown in Figures 11 to 13, a first drainage section D1 is provided in the center below the sub-lobar member 22, and second drainage sections D2 are provided on the left and right below the sub-lobar member 22. The first drainage section D1 is an opening that continues from the secondary extension section 28 through a vertical plane to a horizontal plane, and water that seeps into this secondary extension section 28 basically moves downward through this first drainage section D1.

In the example shown in FIG. 13, water that has entered the inside of the louver is drained downward by dripping, and normally drains downward through the second drainage section D2 formed between the sub-louver member 22 and the case 3. However, if too much water enters and drainage from the second drainage section D2 is impeded, some of the water on the case 3 side of the sub-louver member 22 can flow downward through the first drainage section D1.

2 and 3, the case 3 covered by the louver section 2 has a first notch 31 at the upper part of the left and right side surfaces rising toward the front side, which engages the first locking section 23 of the main louver member 21. The case 3 also has a second notch 32 at the lower part of the left and right side surfaces rising toward the front side, which engages the second locking section 24 of the sub-louver member 22. The upper end of the case 3 also has a bent section 38 bent toward the front side of the louver 1 of the electrical equipment storage cabinet 8, and the bent section 38 and the louver section 2 can be overlapped so that they are in contact with each other. This makes it possible to prevent water from entering the louver 1 between the bent section 38 and the louver section 2.

2 and 3, a belt-shaped restricting portion 35 bent toward the rear side is provided on one side of the lower end of the case 3. By forming the restricting portion 35 in a belt shape on the lower end of the case 3 in this way, the louver 1 can be uniformly positioned at the appropriate position. In addition, bolts 36 are fixed by welding around the filter storage portion 34 so as to protrude toward the rear side. The base end of the bolt 36 is provided with a flange portion 37, and the flange portion 37 and the restricting portion 35 are configured so that their end faces are on the same plane so that when the louver 1 is attached to the housing of the electrical equipment storage cabinet 8, the flange portion 37 and the restricting portion 35 can both come into contact with the surface. In this way, if the case 3 is configured to have a bolt 36 for attaching to the cabinet 8 and one end of the bolt 36 is configured to have a flange portion 37 that limits the compression amount of the packing 91 with the same limiting amount as the restricting portion 35, the louver 1 can be more uniformly positioned at the appropriate position.

Here, an example of how to assemble the louver 1 will be described. First, the filter 4 is stored in the filter storage section 34 of the case 3. If it is necessary to improve the dustproof performance, an adapter 61 is further attached. After that, the second locking portion 24 of the sub louver member 22 is inserted into the second notch portion 32 of the case 3. At this time, the first abutment portion 25 can be abutted against the case 3. Then, the first locking portion 23 of the main louver member 21 is hooked onto the first notch portion 31 of the case 3. At this time, the second abutment portion 26 can be in contact with the main louver member 21. Finally, the main louver member 21 is screwed from the outside of the front surface. In this embodiment, at this time, the screw 94 is inserted into the main louver member 21 and the sub louver member 22, and then screwed into the boss stud 39 provided on the case 3.

10, in this embodiment, the first abutment portion 25 of the sub louver member 22 is abutted against the case 3, and the second abutment portion 26 of the sub louver member 22 is abutted against the main louver member 21, and the wobble of the louver 1 can be suppressed. In addition, the upper end of the sub louver member 22 is bent over one side toward the case 3 to form the first abutment portion 25, which is abutted against the case 3. Therefore, water that has infiltrated from the gap at the top of the louver 1 (the joint surface between the main louver member 21 and the folded portion 38 of the case 3) is discharged to the protruding portion 27 of the main louver member 21, or drips down the inside of the louver portion 2 and is discharged from the water drainage hole 18 provided at the lower end of the louver 1. In other words, by providing the first abutment portion 25, water is prevented from infiltrating into the filter 4 and seeping into the filter 4, and a drainage flow path to the outside of the louver 1 is secured. In addition, the drainage hole 18 in this embodiment is configured by cutting out the rear side of the lower part of the main body louver member 21.

Next, an example of how to attach the louver 1 to the electrical equipment storage cabinet 8 will be described. As can be seen from Figures 2 and 3, the outer wall 80 of the electrical equipment storage cabinet 8 has a louver attachment hole 81 aligned with the filter storage section 34 and a round hole 82 aligned with the position of the bolt 36. In this example, after the packing 91 is attached to the louver 1, the filter storage section 34 is inserted into the louver attachment hole 81, and then the mounting fixture is tightened to attach the louver 1 to the electrical equipment storage cabinet 8 via the packing 91.

Specifically, the bolts 36 provided on the case 3 are inserted through the round holes 92 in the packing 91 and the round holes 82 in the outer wall 80 of the electrical equipment storage cabinet 8, and the nuts 95 are turned and tightened from inside the electrical equipment storage cabinet 8 to secure the case in place. In this example, the bolts 36 and nuts 95 are the mounting fixtures.

When the nut 95 is screwed in, the packing 91 arranged between the case 3 and the electrical equipment storage cabinet 8 is crushed, but since the restricting portion 35 provided at the lower end of the case 3 and the like are configured to abut against the outer wall 80 of the electrical equipment storage cabinet 8 at a position where it is tightened to a certain extent, excessive tightening of the packing 91 can be avoided. Therefore, it is possible to prevent the outer wall 80 of the electrical equipment storage cabinet 8 from coming close to the louver 1 due to overtightening of the nut 95, thereby narrowing the space between the drain hole 18 and the outer wall 80. In addition, since the end face of the flange portion 37 around the bolt 36 and the end face of the restricting portion 35 are on the same plane, the entire louver 1 can be tightened uniformly. Therefore, the louver 1 can be installed properly without being tilted.

The present invention has been described above using examples of embodiments, but the present invention is not limited to the above-mentioned embodiments and can be implemented in various forms. For example, the structure of the louver portion is not limited to the examples shown in the drawings, and the orientation of the ventilation holes in the main louver member and the sub louver member may be different.

3 Case 34 Filter storage section 61 Adapter Sp Gap

Claims (3)

a case including a frame portion located on a rear side of the filter, an extension portion extending from the frame portion to a front side, and a filter storage portion having an opening on the front side and extending to the rear side;
an adapter having an air vent and being attached between the louver portion and the case so as to cover an upper portion and a side portion of a peripheral portion of the filter storage portion on the front side of the case;
Equipped with
A ventilation device for an electrical equipment storage cabinet in which an adapter is attached so that a portion does not overlap with the upper surface of the extended portion located below the filter when viewed from the front, thereby providing a path that allows water that has entered the filter storage section to be drained from the bottom of the filter storage section to the front side of the case. The ventilation device for electrical equipment storage cabinets according to claim 1, in which an adapter is attached so as to provide a drainable gap below the filter storage section. The ventilation device for electrical equipment storage cabinets according to claim 1 or 2, which is provided with a movement restriction part at the bottom of the adapter, which is used to restrict the movement of the adapter relative to the case.

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