JP2023046618A - Air intake structure for outdoor electric apparatus housing - Google Patents

Abstract

To provide an air intake structure for an outdoor electric apparatus housing capable of performing appropriate waterproofing and drainage without restricting a housing installation place and disturbing a worker.SOLUTION: An air intake structure comprises: a first ventilation hole 11 formed in a housing wall 10 of a housing 1; a ventilation path 30 extending in a vertical direction from the first ventilation hole 11 to a second ventilation hole 31 at an upper side Y1 at a deeper side X2 of the housing 1 from the housing wall 10; and a deep wall 32, a front wall 33 and a bottom wall 35 forming the ventilation path 30. The front wall 33 includes a first inclined plate 42 extending from the front wall 33 to a lower side Y2 and the deep side X2. The deep wall 32 includes a second inclined plate 43 extending from the deep wall 32 to the lower side Y2 and a front side X1. The first inclined plate 42 and the second inclined plate 43 are disposed alternately in the vertical direction. The bottom wall 35 forming the ventilation path 30 is inclined toward the first ventilation hole 11 in a direction from the upper side Y1 to the lower side Y2 and configured to discharge water which enters the ventilation path 30 via the first ventilation hole 11.SELECTED DRAWING: Figure 4

Description

TECHNICAL FIELD The present disclosure relates to an air intake structure for an outdoor electrical equipment housing that is installed outdoors and accommodates electrical equipment.

2. Description of the Related Art When electrical equipment such as a power board, a power distribution board, a receiving board, a capacitor board, and a light board is installed outdoors, the electrical equipment is housed in an outdoor electrical equipment housing in order to avoid adverse effects due to rainfall or the like. Electrical equipment generates heat and requires a ventilation structure.

Patent Document 1 describes, as one of the air intake structures, the provision of an air intake hood that covers the air intake of an outdoor electric equipment housing from the outside of the housing.

Japanese Utility Model Laid-Open No. 5-31296

However, Patent Document 1 has a structure in which the suction hood is attached to the outside of the housing, and the suction hood protrudes greatly from the wall surface of the housing. There are problems such as restrictions on the installation location of the body, and if the suction hood is attached to the door wall of the enclosure, it will be an obstacle for the operator, and there is room for improvement in the structure. think.

In addition, it is also required to be able to properly discharge water that has entered from the intake port without increasing the size of the structure.

The present disclosure provides an air intake structure for an outdoor electric equipment housing that does not restrict the installation location of the housing or interfere with workers, and is capable of adequate waterproofing and drainage.

The air intake structure of the outdoor electrical equipment housing of the present disclosure includes a first ventilation opening formed in a housing wall extending in the vertical direction of a housing that accommodates the electrical equipment, and a rear side of the housing relative to the housing wall. , a ventilation path extending vertically from the first ventilation opening to a second ventilation opening above the first ventilation opening, and a back wall, a front wall, a pair of side walls and a bottom wall forming the ventilation path. wherein the front wall forming the ventilation passage has at least one first inclined plate extending downward and to the rear from the front wall, and the rear wall forming the ventilation passage is the rear wall at least one second inclined plate extending downward and forward from the ventilation The bottom wall forming the passage is inclined toward the first ventilation opening from above to the bottom so that water that has entered the ventilation passage can be discharged through the first ventilation opening. It is

1 is an external view showing the front of an outdoor electrical equipment housing of the present disclosure; FIG. FIG. 4 is a rear perspective view showing how the cover is fixed to the housing wall from the back side. An assembly diagram of the cover, inclined plate, packing, and filter. FIG. 5(b) is a cross-sectional view taken along IV-IV. FIG. 5 is a view of the cover viewed from the back and a front view of the second ventilation port of the cover. The figure which shows a 1st inclination plate and a 2nd inclination plate.

An embodiment of the present disclosure will be described with reference to the drawings.

As shown in FIG. 1, the outdoor electrical equipment housing is a housing 1 that accommodates electrical equipment inside. The housing 1 has a box shape and has housing walls 10 extending in the vertical direction (Y1, Y2). In this embodiment, the housing wall 10 is a wall surface of a part of the door, but it is not limited to this. It is good also as a wall surface extending in an up-down direction instead of a door. Here, the vertical direction may be slightly slanted with respect to the vertical, and it does not mean that it is limited to being parallel to the vertical direction. In the example of FIG. 1, a plurality of housings 1 are arranged side by side, and each housing 1 is provided with a door. A first ventilation port 11 is formed in the housing wall 10 of each door. The housing wall 10 is provided with a handle 12 for opening the door and a window 13 for making the inside visible. The housing 1 is covered with a roof 14 from above Y1.

As shown in FIG. 2, the cover 2 is fixed to the surface of the housing wall 10 from the depth side X2 to the depth side X2 of the housing wall 10 . The cover 2 is attached so as to cover the first ventilation port 11 . The cover 2 is fixed with fasteners 60 such as bolts. FIG. 5 is a rear view of the cover 2 and a front view of the second ventilation port 31 of the cover 2. FIG. FIG. 5(b) is a view of the cover 2 attached to the housing wall 10 as viewed from the back side X2 toward the front side X1. FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 5(b). As shown in FIGS. 4 and 5B, the cover 2 forms a ventilation path 30 extending in the vertical direction on the inner side X2 of the housing 1 from the housing wall 10. As shown in FIG. The ventilation path 30 extends vertically from the first ventilation port 11 to the second ventilation port 31 . The second ventilation intake port 31 is formed in the cover 2 and arranged above the first ventilation port 11 Y1. As shown in FIGS. 2, 3 and 4, the ventilation passage 30 is defined by at least a back wall 32, a front wall 33, a pair of side walls 34 and a bottom wall 35. As shown in FIG. The rear wall 32, the front wall 33, the side walls 34 and the bottom wall 35 are integrally formed by bending or welding to form a box shape. A downward U-shaped packing 40 is provided between the box-shaped cover 2 and the housing wall 10 to seal the upper, left, and right sides of the box.

As shown in FIGS. 2 to 4 (especially FIG. 4), the front wall 33 forming the ventilation passage 30 has at least one first inclined plate 42 extending downward Y2 and back X2 from the front wall 33. As shown in FIG. In this embodiment, two first inclined plates 42 are provided. Although the number can be changed as appropriate, it is preferably two or more. Similarly, the back wall 32 forming the ventilation path 30 has at least one second inclined plate 43 extending downward Y2 and forward X1 from the back wall 32 . The first inclined plates 42 and the second inclined plates 43 are alternately arranged along the vertical direction (Y1, Y2). In this embodiment, the first slanted plates 42, the second slanted plates 43, and the first slanted plates 42 are alternately arranged in this order from the lower side Y2 toward the upper side Y1. The first inclined plate 42 and the second inclined plate 43 of the present embodiment are inclined at 45 degrees with respect to the horizontal direction, but the angle can be changed as appropriate.

Since the first sloping plate 42 and the second sloping plate 43 are directed downward, even if the water flowing upward from below enters, the water can be repelled downward. Furthermore, the water adhering to the first inclined plate 42 and the second inclined plate 43 can be dropped downward, and the water falling from above can be guided further downward, so that the water can be discharged appropriately.

Further, as shown in FIG. 4, the first inclined plate 42 and the second inclined plate 43 are arranged at positions that do not overlap when viewed in a line of sight parallel to the vertical direction (Y1, Y2). This forms the atrium space SP1 in the ventilation path 30 between the first inclined plate 42 and the second inclined plate 43 . By forming the atrium space SP1, air resistance can be reduced compared to a configuration without the atrium space SP1, and ventilation performance can be improved. Of course, the first slanted plate 42 and the second slanted plate 43 may be arranged at overlapping positions when viewed parallel to the vertical direction (Y1, Y2) so that the atrium space SP1 is not provided.

FIG. 6 is a diagram showing the first inclined plate 42 and the second inclined plate 43. As shown in FIG. FIG. 6(a) is a perspective view of the first inclined plate 42 and the second inclined plate 43, and FIG. 6(b) is a side view of the first inclined plate 42 and the second inclined plate 43 viewed from the left-right direction. is. As shown in FIG. 6 , the first inclined plate 42 and the second inclined plate 43 are composed of a body plate portion 44 , bending pieces 45 formed at the ends of the body plate portion 44 in the front-rear direction, and the body plate portion 44 . fixed bending pieces 46 formed at the left and right ends of the . As shown in FIG. 4 , the first inclined plate 42 has a bent piece 45 at the end of the front side X1 of the housing 1 . The bent piece 45 of the first inclined plate 42 is attached while being pressed against the wall surface (the front wall 33 ) forming the ventilation passage 30 and accumulating an elastic repulsive force. A fixed bending piece 46 is fixed to the side wall 34 of the first inclined plate 42 . This makes it possible to reduce or eliminate the gap between the bending piece 45 and the front wall 33 without performing a complicated sealing process. Similarly, the second inclined plate 43 has a bent piece 45 formed at the end of the housing 1 on the back side X2. The bent piece 45 of the second inclined plate 43 is attached while being pressed against the wall surface (back wall 32) forming the ventilation passage 30 and accumulating an elastic repulsive force. A fixed bent piece 46 of the second inclined plate 43 is fixed to the side wall 34 . This makes it possible to reduce or eliminate the gap between the bent piece 45 and the front wall 33 without performing a complicated sealing process.

A bottom wall 35 forming the ventilation path 30 is inclined toward the first ventilation port 11 from the upper side Y1 toward the lower side Y2. As a result, water that has entered the ventilation path 30 can be discharged through the first ventilation port 11 . In this embodiment, the bottom wall 35 protrudes to the front side X1 (outside) of the housing 1 through the first ventilation port 11 . The bottom wall 35 protrudes from the front surface of the housing wall 10 toward the front side X1 of the housing 1 . The amount of protrusion of the bottom wall 35 in the front-rear direction (X1, X2) from the housing wall 10 is smaller than the amount of protrusion of the door handle 12 in the front-rear direction (X1, X2) from the housing wall 10 . As a result, the protrusion of the bottom wall 35 does not interfere with the operator.

As shown in FIGS. 2 and 4, the lower edge of the first ventilation port 11 is fitted with a downward U-shaped packing 41 that sandwiches the lower edge. As shown in FIG. 2, with the bottom wall 35 of the cover 2 inserted into the first ventilation port 11, the bottom plate forming the bottom wall 35 is pressed downward, and the cover 2 is positioned on the back side X2 of the housing wall 10. As shown in FIG. fixed to As a result, the bottom plate forming the bottom wall 35 is fixed while compressing the packing 41 . With this configuration, the sealing process between the bottom plate and the lower edge of the first ventilation port 11 can be performed simply by pressing the bottom plate against the packing 41 .

As shown in FIGS. 2, 3, 4 and 5, filters 50, 51 are provided to cover the second vent 31. As shown in FIGS. The filter 50 is a mesh filter with expanded medals. Filter 51 is a salt resistant filter. The filter 50 and the filter 51 are fixed in a state of being held down by a fixture 52 attached to the cover 2 .

The air intake structure of this embodiment is an air intake structure in which the air taken in through the first ventilation port 11 flows into the housing 1 through the second ventilation port 31, as indicated by an arrow L1 in FIG. In order to ensure the intake performance, the minimum cross-sectional area of the ventilation path 30, which is determined by the first inclined plate 42 and the second inclined plate 43 as one of the conditions, is the area of the second ventilation port 31 and the transmittance of the filters 50 and 51. is set to be larger than the area multiplied by For example, when the board width is 600 mm, as shown in FIG. .2 mm. As shown in FIG. 5B, the lateral width W2 of the ventilation path 30 is 270 mm. Therefore, the minimum cross-sectional area of the ventilation path 30 is 85.2 mm×270 mm≈23004 mm ² . FIG. 5(a) is a front view of the second ventilation port 31. FIG. As shown in the figure, the area of the second ventilation port 31 is width W3 (=245 mm)×length W4 (128 mm)=31360 mm ² . The transmittance of filters 50 and 51 is 67%. The area obtained ^by multiplying the area of the second ventilation port 31 by the transmittance of the filters 50 and 51 is about 21011 mm ² . It becomes possible to avoid that the performance is impaired. The minimum cross-sectional area of the ventilation passage 30, which is ^determined by the first inclined plate 42 and the second inclined plate 43 as one of the conditions, is 23004 mm ² as described above. It is larger than the area of the second ventilation port 31 (approximately 21011 mm ² ) considering the transmittance of , and prevents the deterioration of the air intake performance.
In addition, the transmittance is a value measured by a measuring method specified in JIS G3351. In this embodiment, the transmittance is determined by considering both the mesh filter (50) and the salt-resistant filter (51), but the transmittance is not limited to this. When only the mesh filter (50) is used, the transmittance means the aperture ratio of the mesh filter (50). In the case of only the salt-resistant filter (51), the transmittance means the transmittance of the salt-resistant filter (51).

As shown in FIG. 4, the vertical width W5 of the first ventilation port 11 is 110 mm, and the horizontal width of the first ventilation port 11 is 270 mm, which is the same as the lateral width W2 of the ventilation path 30. The area of 11 is 29700 mm ² . The area of the second ventilation port 31 is 31360 mm ² , and the area of the first ventilation port 11 is made smaller than the area of the second ventilation port 31 . Thus, by making the first ventilation opening 11 small while securing the air intake performance, it is possible to suppress the infiltration of rain compared to the case where the first ventilation opening 11 and the second ventilation opening 31 are the same size.

Although the above sizes are exemplified when the width of the board is 600 mm, the width of the board can be appropriately changed to, for example, 650 mm, 700 mm, 750 mm, 800 mm, 900 mm, 1000 mm, and 1100 mm. When changing the board width, W2 and W3 may be changed.

As described above, the air intake structure of the outdoor electrical equipment housing of the present embodiment includes the first ventilation opening 11 formed in the housing wall 10 extending in the vertical direction (Y1, Y2) of the housing 1 that accommodates the electrical equipment. and a ventilation path 30 extending vertically from the first ventilation port 11 to a second ventilation port 31 above the first ventilation port 11 on the back side X2 of the housing 1 from the housing wall 10, and ventilation It comprises a back wall 32, a front wall 33, a pair of side walls 34 and a bottom wall 35 forming a passage 30, the front wall 33 forming the ventilation passage 30 extending downwardly Y2 and backward X2 from the front wall 33 at least. The back wall 32, which has one first inclined plate 42 and forms the ventilation passage 30, has at least one second inclined plate 43 extending downward Y2 and forward X1 from the back wall 32, and has at least one first inclined plate 43. The slanted plates 42 and at least one second slanted plate 43 are alternately arranged along the vertical direction (Y1, Y2), and the bottom wall 35 forming the ventilation path 30 is inclined from the upper side Y1 toward the lower side Y2. It may be slanted toward the first ventilation port 11 so that water that has entered the ventilation passage 30 can be discharged through the first ventilation port 11 .

According to this configuration, the ventilation path 30 is formed on the back side X2 of the housing 1 from the housing wall 10 extending in the vertical direction (Y1, Y2) of the housing 1. It becomes possible to reduce the obstruction of the operator. In addition, since the first inclined plate 42 and the second inclined plate 43 in the ventilation passage 30 face downward Y2, respectively, the infiltration of water from the downward direction Y2 to the upward direction Y1 is prevented, and the first inclined plate 42 and the second inclined plate 42 are prevented from entering upward Y1. Water attached to the inclined plate 43 can be dropped and guided to the bottom wall 35.例文帳に追加Furthermore, since the bottom wall 35 forming the ventilation path 30 is inclined toward the first ventilation port 11, the water that has entered the ventilation path 30 can be discharged through the first ventilation port 11. waterproofing and drainage are possible.

Although not particularly limited, the bottom wall 35 extends to the front side X1 of the housing 1 through the first ventilation port 11 and protrudes outside the housing 1 beyond the first ventilation port 11 as in the present embodiment. , may be
According to this configuration, since the tip of the bottom wall 35 is positioned outside the housing 1 relative to the first ventilation port 11, water can be drained accurately.

Although not particularly limited, as in the present embodiment, the packing 41 that sandwiches the lower edge of the first ventilation port 11 may be provided, and the bottom plate forming the bottom wall 35 may be fixed in a state of compressing the packing 41. .
According to this configuration, the bottom plate forming the bottom wall 35 and the lower edge of the first ventilation port 11 can be sealed simply by pressing the bottom plate against the packing 41 without applying a sealing process between them. As a result, the easiness of assembly can be improved.

Although not particularly limited, as in this embodiment, the first inclined plate 42 has a bending piece 45 at the end of the front side X1 of the housing 1, and the second inclined plate 43 is located at the back side X2 of the housing 1. The bent pieces 45 of the first inclined plate 42 and the second inclined plate 43 are pressed against the wall surfaces (back wall 32, front wall 33) forming the ventilation passage 30, respectively, and become elastic. It may be attached in a state of accumulating a repulsive force.
According to this configuration, the sealing process between the first inclined plate 42 and the second inclined plate 43 and the wall surfaces (back wall 32 and front wall 33) forming the ventilation passage 30 can be realized with a simple configuration. . It may be possible to omit the sealing member between the two, which makes it possible to simplify the structure and improve the easiness of assembly.

Although not particularly limited, as in the present embodiment, the first inclined plate 42 and the second inclined plate 43 are arranged at positions where none of them overlap when viewed in a line of sight parallel to the vertical direction (Y1, Y2). The atrium space SP1 may be formed in the ventilation path 30.
According to this configuration, air resistance can be reduced by the atrium space SP1, so that intake performance (ventilation performance) can be improved.

Although not particularly limited, filters 50 and 51 covering the second ventilation port 31 are further provided as in the present embodiment, and the air sucked from the first ventilation port 11 flows into the inside of the housing 1 from the second ventilation port 31. It may be assumed that it is an intake structure that
According to this configuration, the filters 50 and 51 can provide an insect repellent effect, a small animal invasion preventive effect, and a salt resistance effect. In addition, since it is a structure in which air is sucked from the first ventilation port 11 on the lower side Y2 and air flows into the inside of the housing 1 from the second ventilation port 31 on the upper side Y1, it moves from the front side X1 to the back side X2 along the horizontal direction. The second ventilation port 31 can be made smaller compared to a structure in which air is directed toward the air, and the cost can be reduced by reducing the area of an expensive filter such as a salt-resistant filter.

Although not particularly limited, as in the present embodiment, the minimum cross-sectional area of the ventilation path 30 determined by the first inclined plate 42 and the second inclined plate 43 as one of the conditions is the area of the second ventilation port 31 and the passage of the filter. It may be more than the area multiplied by the ratio.
According to this configuration, it is possible to reduce the size of the structure such as the cover 2 while avoiding a significant decrease in the intake capacity.

Although not particularly limited, as in this embodiment, the area of the first ventilation port 11 is smaller than the area of the second ventilation port 31 to which the filters 50 and 51 are attached, and the area of the second ventilation port 31 and the filters 50 and 50 are smaller than the area of the second ventilation port 31. 51 times the passage rate or more.
According to this configuration, it is possible to prevent the infiltration of rain while ensuring the air intake capacity.

The present disclosure is by no means limited to the above-described embodiments, and various improvements and modifications are possible without departing from the gist of the present disclosure.

(1) In this embodiment, the bottom plate forming the bottom wall 35 protrudes from the first ventilation port 11 toward the front side X1 (outside) of the housing 1 . It may be configured to be connected to the first ventilation port 11 via a packing without protruding from.

(2) In the present embodiment, both the mesh filter (50) and the salt-resistant filter (51) are provided as filters, but only one of them may be used, and a structure without a filter may also be adopted.

1 housing 10 housing wall 11 first ventilation port 30 ventilation path 31 second ventilation port 32 inner wall 33 front wall 35 bottom wall 41 packing 42 first inclined plate 43 second inclined plate 45 bending piece 50, 51 filter SP1 atrium space

Claims (8)

a first ventilation opening formed in a housing wall extending in the vertical direction of a housing that houses the electric device;
a ventilation path extending vertically from the first ventilation opening to a second ventilation opening above the first ventilation opening on the inner side of the housing with respect to the housing wall;
a back wall, a front wall, a pair of side walls and a bottom wall that form the ventilation path,
the front wall forming the ventilation path has at least one first inclined plate extending downward and to the rear from the front wall;
the back wall forming the ventilation path has at least one second inclined plate extending downward and forward from the back wall;
The at least one first inclined plate and the at least one second inclined plate are arranged alternately along the vertical direction,
The bottom wall forming the ventilation path is inclined toward the first ventilation opening from above to the bottom, and water that has entered the ventilation path can be discharged through the first ventilation opening. The air intake structure for an outdoor electrical equipment enclosure, which is composed of: 2. The outdoor electrical equipment enclosure according to claim 1, wherein the bottom wall extends to the front side of the enclosure through the first ventilation opening and protrudes outside the enclosure beyond the first ventilation opening. intake structure. A packing that sandwiches the lower edge of the first ventilation port is provided,
3. The air intake structure for an outdoor electrical equipment housing according to claim 2, wherein a bottom plate forming said bottom wall is fixed in a state of compressing said packing. the first inclined plate has a bent piece at the front end of the housing,
the second inclined plate has a bent piece at an end on the back side of the housing,
4. The bent pieces of the first inclined plate and the second inclined plate according to any one of claims 1 to 3, wherein the bending pieces are attached in a state of being pressed against the wall surface forming the ventilation passage and accumulating an elastic repulsive force. 2. The air intake structure of the outdoor electrical equipment housing according to 1. The first sloping plate and the second sloping plate are arranged at positions that do not overlap each other when viewed in a line of sight parallel to the vertical direction, and form an atrium space in the ventilation passage. 5. The air intake structure for an outdoor electric equipment housing according to any one of 4. 6. The air intake structure according to any one of claims 1 to 5, further comprising a filter covering said second ventilation port, and allowing air taken in from said first ventilation port to flow into said housing from said second ventilation port. The air intake structure of the described outdoor electrical equipment housing. 7. The minimum cross-sectional area of the ventilation path determined by the first inclined plate and the second inclined plate as one of the conditions is equal to or larger than the area obtained by multiplying the area of the second ventilation port by the passage rate of the filter. 2. The air intake structure of the outdoor electrical equipment housing according to 1. 6 or 8. The intake structure of the outdoor electric equipment housing according to 7.

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