JP2013222882A - Ventilator for ventilation of electric apparatus box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a ventilator for ventilation of an electric apparatus box for efficiently ventilating the inside of an electric apparatus box by effectively introducing ventilation air independent of difference in wind directions.SOLUTION: A ventilator for ventilation of an electric apparatus box includes a louver plate 2 which covers the outer surface of a mounting opening 1 provided to an outer wall W. On a plate wall 8 of the louver plate 2, a group of louver walls 9, and a group of ventilation ports 10 to be formed along the lower edges of the louver walls 9 are formed like multistage every fixed interval. Each of the louver walls 9 is constituted in the upper convex shape, of an apex 18 provided at least at one part of a middle part in the longitudinal direction of the louver wall 9, and a plurality of hem walls 19 inclining upward toward the apex 18. The swelling base end side of the louver wall 9 is provided with a diversion wall 20 for diverting and guiding a part of wind collided with the louver wall 9 toward a ventilation port 10 located on the upper side of the louver wall 9.

Description

  The present invention relates to a ventilation device for ventilation applied to electrical equipment boxes such as distribution boards and distribution boards.

  This type of ventilation device is known, for example, from Patent Document 1 according to the proposal of the present applicant. There, a louver plate that covers the outer surface of the mounting opening, a filter that is disposed on the inner surface of the louver plate, and an air guide box that is disposed on the inner surface of the mounting opening and guides the air after passing through the filter upward. Is used as a main water-stop element to constitute a ventilation device. On the plate surface of the louver plate, a louver wall that opens downward is formed in a multi-stage shape in a state where the louver wall bulges outward, and a ventilation opening is horizontally opened along the lower edge of each louver wall.

  In the ventilation device of Patent Document 2, the outer surface of the mounting opening is covered with an outer louver body, and further, the inner surface of the outer louver body is covered with an inner louver body, and an inverted V-shaped ventilation path is formed between both louver bodies. ing. In addition, a wind guide box for guiding the ventilation air upward is disposed on the inner surface of the inner louver body. In the outer louver body, a louver wall that rises and inclines toward the indoor side is cut and raised, and similarly, a louver wall that rises and inclines toward the outdoor side is cut and formed in the inner louver body. A horizontal ventilation opening is formed between the upper and lower adjacent louver walls.

Japanese Patent Laying-Open No. 2005-057213 (paragraph numbers 0019 to 0020, FIG. 1) JP 2002-010416 A (paragraph numbers 0015 to 0017, FIG. 1)

  In the ventilation device of Patent Document 1, since the louver wall is bulging horizontally with the downward opening, the ventilation air is introduced from the ventilation port into the ventilation device while guiding raindrops flowing down the louver wall. Can do. However, since the ventilation opening is opened horizontally along the lower edge of the louver wall, it is difficult to effectively introduce the ventilation air depending on the wind direction, so that the ventilation efficiency in the electric equipment box is lowered. . For example, when a wind mixed with rain blows toward the louver wall obliquely from above, most of the wind hitting the inclined louver wall is guided obliquely downward along the louver wall together with raindrops. . Similarly, when the wind mixed with rain flows parallel to the ventilation opening, it is difficult to effectively introduce the ventilation air. In particular, when the inside of the electrical equipment box is a ventilation device that introduces ventilation air by the natural convection effect of air, the ventilation air cannot be effectively introduced. Therefore, ventilation in the electrical equipment box cannot be performed efficiently.

  An object of the present invention is to provide a ventilation device for ventilation of an electrical equipment box, which can effectively ventilate the electrical equipment box by effectively introducing ventilation air without being greatly affected by the difference in wind direction. It is to provide.

  The ventilation device for an electrical equipment box according to the present invention includes a louver plate 2 that covers the outer surface of the mounting opening 1 provided on the outer wall W. On the plate wall 8 of the louver plate 2, a group of louver walls 9 and a group of ventilation openings 10 formed along the lower edge of the louver wall 9 are formed in multiple stages at regular intervals. The louver wall 9 is configured to be upwardly convex with a top portion 18 provided at at least one midway in the left-right direction of the louver wall 9 and a plurality of skirt walls 19 inclined upward toward the top portion 18. It is characterized by.

  The plate wall 8 of the louver plate 2 is pressed to form a louver wall 9 bulging outwardly continuously from the plate wall 8. As shown in FIG. 2, a direction for guiding a part of the wind colliding with the louver wall 9 toward the ventilation port 10 located on the upper side of the louver wall 9 on the bulging base end side of the louver wall 9. A wall 20 is provided.

  The louver wall 9 is formed in a square shape with a top portion 18 provided at the center of the left and right sides of the louver wall 9 and a pair of left and right hem walls 19 that incline and incline toward the top portion 18 (see FIG. 1).

  As shown in FIG. 5A, the louver wall 9 is formed in an upwardly convex curve shape with the top portion 18 and the skirt wall 19 smoothly connected.

  As shown in FIG. 5 (b), the louver wall 9 includes a top portion 18 provided at a plurality of locations in the middle in the left-right direction of the wall 9 and a plurality of skirt walls 19 inclined upward toward each top portion 18. Form a continuous waveform.

  As shown in FIG. 5 (c), a plurality of rows of bar-shaped louver walls 9 can be provided on the plate wall 8 of the louver plate 2.

  In the present invention, the louver wall 9 formed on the plate wall 8 of the louver plate 2 includes a top portion 18 provided at at least one middle portion in the left-right direction of the louver wall 9 and a plurality of slopes that rise upward toward the top portion 18. The hem wall 19 is configured to be convex upward. In this way, when the louver wall 9 is configured to be convex upward, a part of the wind that collides with the louver wall 9 is laterally guided by the inclined hem wall 19 so that the wind is changed and guided. It can be made to flow to the vent 10 located on the upper side. Therefore, according to the ventilating device for ventilation according to the present invention, ventilation air is effectively introduced into the louver plate 2 without being greatly affected by the difference in wind direction, and ventilation in the electric equipment box is efficiently performed. Can be done well. In particular, even when a rain-mixed wind blows from diagonally above or when a rain-mixed wind blows sideways along the plate wall 8 of the louver plate 2, a skirt wall 19 that inclines a part of the wind. Thus, the ventilation air can be reliably introduced into the interior of the louver plate 2. Further, when the same number of horizontal louver walls and upward convex louver walls 9 are formed on the louver plate, when comparing the opening areas of the two ventilation openings 10, the opening area of the former ventilation opening 10 is compared. As compared with the above, the opening area of the latter vent 10 can be increased. Therefore, ventilation air can be more effectively introduced into the louver plate 2 to efficiently ventilate the electric equipment box.

  When the louver wall 9 is continuously bulged outwardly from the plate wall 8 and a turning wall 20 is provided on the bulging base end side of the louver wall 9, a part of the wind that collides with the louver wall 9 is turned to the turning wall. At 20, it is possible to guide the direction of change more actively toward the vent 10 located on the upper side. For example, compared to the case where the cross section of the louver wall 9 is formed of a wall that is linearly inclined downward from the bulging base end, a larger amount of wind is redirected and guided by the deflecting wall 20, Ventilation in the electrical equipment box can be performed more effectively.

  When the louver wall 9 is formed in a U-shape by a top portion 18 provided at the center of the left and right sides of the louver wall 9 and a pair of left and right skirt walls 19 that rises and inclines linearly toward the top portion 18, Can be introduced evenly from the ventilation openings 10 facing the left and right hem walls 19. Therefore, even if the wind direction is rightward or leftward, the ventilation air is effectively introduced into the louver plate 2 without being greatly affected by the difference, and ventilation in the electric equipment box is effective. Can be done.

  When the louver wall 9 is formed in an upwardly convex curved shape with the top portion 18 and the skirt wall 19 smoothly connected, the flow direction of the wind guided by the turning wall 20 and the louver wall 9 The intersection angle with the hem wall 19 can be gradually increased as it approaches the left and right ends from the left and right center. Further, the vertical distance between the louver walls 9 adjacent to each other in the vertical direction can be gradually reduced as the louver wall 9 approaches the left and right ends of the louver wall 9. Therefore, the wind guided by the turning wall 20 can be introduced more accurately from the ventilation openings 10 facing both sides of the bottom wall 19.

  When the louver wall 9 is formed in a continuous waveform by the plurality of top portions 18 and the plurality of skirt walls 19, the area occupied by the louver wall 9 and the vent 10 in the plate wall 8 of the louver plate 2 is increased. Ventilation air can be effectively introduced into the louver plate 2. As shown in FIG. 1 or FIG. 5 (a), when the upper convex louver wall 9 is provided in multiple stages, the lower center of the lowermost louver wall 9 and the uppermost louver wall 9 are arranged. This is because triangular dead spaces are inevitably generated on the upper left and right sides of the, and the opening area is reduced accordingly.

  When a plurality of row-shaped louver walls 9 are provided on the plate wall 8 of the louver plate 2, the length of each hem wall 19 is half the length of the hem wall 19 described in FIG. 1 or FIG. Since it can be made below, the rainwater that flows down along the louver wall 9 can flow down and discharge along the plate wall 8 quickly. Therefore, the residence time of rainwater on the outer surface of the louver plate 2 can be minimized, and the raindrops contained in the ventilation air can be separated more quickly.

It is a front view of the ventilation apparatus for ventilation which concerns on this invention. It is a center vertical side view of the ventilation apparatus of FIG. It is a disassembled perspective view of the state which looked at the ventilation apparatus for ventilation of FIG. 1 from the rear surface side. It is explanatory drawing which shows the air introduction effect | action of the louver board which concerns on this invention. It is a front view which shows another Example of the ventilation apparatus for ventilation which concerns on this invention.

(Example) FIG. 1 thru | or FIG. 4 shows the Example of the ventilation apparatus for ventilation which concerns on this invention. In the present invention, front / rear, left / right, and upper / lower follow the cross arrows shown in FIG. 1 and FIG.

  In FIG. 2, the ventilation device includes a louver plate 2 that covers the outer surface of the mounting opening 1 that opens to the outer wall W of the electrical equipment box, a wind guide box 3 that covers the inner surface of the mounting opening 1, and an upper opening 4 of the wind guide box 3. The baffle plate 5 (see FIG. 3) provided on the inner surface of the box so as to be inclined downward is provided.

  The louver plate 2 is formed of a square-shaped press-formed product made of a steel plate or a stainless steel plate, and a group of louver walls 9 formed on the plate wall 8 along the lower edge of the louver wall 9. Are formed in multi-stages at regular intervals. The lower edge of the louver wall 9 and the ventilation opening 10 are parallel to each other, and the ventilation opening 10 is opened along a horizontal plane passing through the lower edge of the louver wall 9. A peripheral side wall 11 is formed integrally with the plate wall 8 around the plate wall 8, and the peripheral side wall 11 is received by a packing 15 disposed on the peripheral wall of the mounting opening 1. Stud bolts 12 are welded to six locations around the inner surface of the plate wall 8, and the louver plate 2 and the air guide box 3 are fastened to the peripheral wall of the mounting opening 1 with the stud bolts 12. Therefore, six insertion holes 13 corresponding to the stud bolts 12 are formed in the peripheral wall of the mounting opening 1. Reference numeral 14 denotes a nut that is screwed into the stud bolt 12 via a plain washer.

  As shown in FIG. 2, the louver wall 9 is formed so as to bulge outward by pressing the plate wall 8 of the louver plate 2. Specifically, as shown in FIG. 1, the louver wall 9 is seen from a position facing the louver plate 2, and a top portion 18 that is bent upward at the center of the left and right, and a straight left and right side that is inclined upward toward the top portion 18. A pair of skirt walls 19 are formed in a heft shape (upward convex shape). On the bulging base end side of the louver wall 9, a deflecting wall 20 that guides a part of the wind colliding with the louver wall 9 toward the vent 10 located above the louver wall 9 is provided on the plate wall 8. Are provided in a continuous state. As shown in FIG. 2, the cross-sectional shape of the louver wall 9 is formed in an inverted J shape by a partial arc-shaped turning wall 20 and a wall 21 that is continuous with the wall 20 and covers the outer surface of the vent 10. It is. In this embodiment, eight louver walls 9 are formed on the plate wall 8 of the louver plate 2, and the inclination angle θ of the skirt wall 19 is 30 degrees.

  In FIG. 2, the air guide box 3 includes an air guide wall 24 that faces the louver plate 2, a drain wall 25 that slopes downward continuously from the lower end of the wind guide wall 24, and both sides of the wind guide wall 24 and the drain wall 25. A pair of left and right box side walls 26 to be covered, a drainage wall 25, a rectangular frame-like fastening seat 27 extending along the box side wall 26, and the like. By providing the air guide box 3, the air entering from the ventilation port 10 of the louver plate 2 can be guided upwardly by the air guide wall 24 to separate raindrops from the ventilation air, and the separated raindrops are separated into the drainage wall 25. Then, it can be discharged out of the ventilation device through the drain hole 28 opened at the lower part of the louver plate 2. The baffle plate 5 is provided so as to incline downward from the upper frame portion of the fastening seat 27 toward the air guide wall 24, and the baffle plate 5 receives raindrops that have entered from the ventilation openings 10 of the louver plate 2. Raindrops can be prevented from directly entering the inside of the electrical equipment box from the upper opening 4 of the air guide box 3.

  When the ventilation device is attached to the mounting opening 1, the stud bolt 12 is inserted into the insertion hole 13 from the outer surface side of the mounting opening 1 with the packing 15 assembled to the inner surface of the louver plate 2, and the inner surface of the mounting opening 1. The wind guide box 3 is applied to the fastening bolt 27 and the fastening seat 27 is engaged with the stud bolt 12. In this state, the louver plate 2 and the air guide box 3 can be attached to the mounting opening 1 by screwing the nut 14 into each stud bolt 12 via a washer.

  Below, the introduction | transduction effect | action of the ventilation air by the louver board 2 is demonstrated. FIG. 4 shows a state where a part of the louver wall 9 is enlarged, and a cross-sectional view taken along the line aa on the right side and a cross-sectional view taken along the line bb below it. In FIG. 4, an arrow R indicates a state in which rain-mixed wind blows obliquely from above and collides with the turning wall 20. As described above, the bottom wall 19 occupying most of the louver wall 9 is inclined downward from the top portion 18. Further, the turning wall 20 is inclined downwardly in a partial arc shape with respect to the vertical plate wall 8. Therefore, a part of the wind mixed with rain that collides with the turning wall 20 is reflected or turned by the turning wall 20 and is directed in the direction of arrow R1, that is, above the turning wall 20 with which the wind mixed with rain collides. It is turned sideways toward the vent hole 10 located. At this time, most of the raindrops that have collided with the turning wall 20 flow from the turning wall 20 toward the wall 21 and fall from the lower edge of the wall 21. Therefore, a part of the rain mixed wind that is blown obliquely from above and collides with the turning wall 20 is turned to the side by the turning wall 20 and enters the inside of the louver plate 2 from the vent 10 located on the upper side. Enter.

  Further, when the wind mixed with rain blows sideways along the plate wall 8 of the louver plate 2, the inclined hem wall 19 and the direction of flow of the sideways wind intersect each other. Can be received by the inner surface of the bottom wall 19 and introduced into the louver plate 2. By the way, when the louver wall and the ventilation opening are formed horizontally like a conventional louver plate, most of the wind mixed with rain that blows from the diagonally upper side and collides with the louver wall is the front outer surface of the louver wall. It is difficult to introduce the ventilation air into the louver board. In addition, when wind mixed with rain blows sideways along the horizontal louver wall and ventilation openings, the wind only passes between the upper and lower adjacent louver walls. Difficult to introduce to.

  According to the ventilating device having the above configuration, the opening area of the vent hole 10 is increased by about 15% compared to the case where the same number (eight) of louver walls in the shape of horizontal letters are formed on the louver plate. can do. This is because the inclination angle θ of the skirt wall 19 is 30 degrees. When comparing the total length of one hem wall 19 with the half length of the horizontal louver wall, when the former is 2, the latter is This is because the route 3 is provided, and the opening area of the vent 10 can be increased in proportion to the difference in length. Therefore, ventilation air can be more effectively introduced into the louver plate 2 to efficiently ventilate the electric equipment box.

  FIGS. 5A to 5C show another embodiment of the louver plate 2. In FIG. 5A, the shape of the louver wall 9 when facing the louver plate 2 is formed in a partial arc shape (upward convex curve shape), and the top portion 18 and the left and right hem walls 19 are in a state without a boundary. It was made to continue smoothly. In addition to forming the louver wall 9 in a partial arc shape, the louver wall 9 can be formed in an upwardly convex curved shape by rounding the intersecting portion of the left and right hem walls 19 to form a top portion 18. If necessary, louver walls 9 having a smaller left and right length than the other louver walls 9 are arranged at the center below the lowermost louver wall 9 and above and to the left and right of the uppermost louver wall 9. The opening area of the louver plate 2 can be enlarged.

  FIG. 5B shows still another embodiment of the louver plate 2. In this case, the shape of the louver wall 9 when facing the louver plate 2 was formed in a continuous waveform, and top portions 18 were provided at two midway portions in the left-right direction of the louver wall 9. Further, the bottom wall 19 formed between the top portions 18 adjacent to the left and right is made continuous to form the entire shape of the louver wall 9 in a continuous waveform.

  FIG. 5C shows still another embodiment of the louver plate 2. In this case, the louver walls 9 having a square shape are formed in multiple stages on the left and right sides of the plate wall 8 of the louver plate 2, respectively. As can be understood from this embodiment, the louver wall 9 can be provided in a plurality of rows on the louver plate 2.

  In the embodiment shown in FIG. 1, the top portion 18 is provided at the center in the left-right direction of the louver wall 9, but this is not necessary, and the top portion 18 may be provided at a position shifted from the left-right center of the louver wall 9 to the left or right. it can. In this case, the length of the left and right hem walls 19 differs between the right hem wall 19 and the left hem wall 19, but the inclination angle θ of the left and right hem walls 19 is different from that of the right hem wall 19. The left hem wall 19 may be different or the same.

  In the above embodiment, the ventilation device for ventilation is configured by the louver plate 2, the air guide box 3, the baffle plate 5 and the like, but this is not necessary, and the structure of the ventilation device can be changed as necessary. . For example, a filter can be arranged on the inner surface of the louver plate 2 or the inner surface of the mounting opening 1 to add an insectproof function or a dustproof function to the ventilation device. Moreover, a ventilation fan unit can be provided in the inner surface of the attachment opening 1, and it can be set as a forced ventilation type ventilation apparatus. When the electric equipment box is installed indoors, the outer surface of the mounting opening 1 can be covered with the louver plate 2 to provide a ventilation device.

  The louver plate can be formed of a plastic molded product or an insert molded product with a metal frame inserted, if necessary, in addition to press forming a metal plate material. The metal frame in that case is good to form at least the part to which the stud bolt 12 is fixed in square frame shape. The louver wall 9 can be formed as a separate part from the louver plate 2. Regarding the cross-sectional shape of the louver wall 9, it is not necessary to form the louver wall 9 by the partial arc-shaped turning wall 20 and the vertical wall 21, for example, a straight shape in which the turning wall 20 is continuously inclined with respect to the plate wall. Or a cross section of the louver wall 9 can be formed in an inverted L shape. The ventilation port 10 does not need to open along a horizontal plane passing through the lower edge of the louver wall 9, and is directed from the lower edge of the louver wall 9 toward the plate wall 8 with respect to the horizontal plane passing through the lower edge of the louver wall 9. An opening can be made along a plane inclined downward.

  The louver wall 9 can be formed in a state in which only one inclined skirt wall 19 continues in a multi-stage shape. However, in that case, when wind mixed with rain blows sideways along the plate wall 8 of the louver plate 2 toward the vent 10, the wind can be introduced into the louver plate 2, but in the opposite direction. In the case of blowing through, the wind cannot be effectively introduced in that the wind cannot be introduced into the louver plate 2.

DESCRIPTION OF SYMBOLS 1 Installation opening 2 Louver board 3 Plate wall 9 of the air guide box 8 2 Louver wall 10 Ventilation hole 18 Top part 19 Bottom wall 20 Turning wall 21 庇 Wall W The outer wall of an electric equipment box

Claims (6)

A ventilating device for ventilation of an electrical equipment box comprising a louver plate (2) covering an outer surface of a mounting opening (1) provided on an outer wall (W),
The plate wall (8) of the louver plate (2) has a group of louver walls (9) and a group of ventilation holes (10) formed along the lower edge of the louver wall (9) at regular intervals. It is formed in multiple stages,
A louver wall (9) having a top portion (18) provided at at least one midway in the left-right direction of the louver wall (9), and a plurality of bottom walls (19) inclined upward toward the top portion (18); A ventilating device for ventilation of an electrical equipment box, characterized in that it is configured in an upward convex shape. The plate wall (8) of the louver plate (2) is subjected to press working, and the louver wall (9) is continuously formed to bulge outward from the plate wall (8),
On the bulging base end side of the louver wall (9), a part of the wind colliding with the louver wall (9) is deflected and guided toward the ventilation port (10) located above the louver wall (9). The ventilation device for ventilation of an electric equipment box according to claim 1, wherein a facing wall (20) is provided.   The louver wall (9) has a square shape with a top portion (18) provided at the center of the left and right sides of the louver wall (9) and a pair of left and right hem walls (19) that rises linearly toward the top portion (18). The ventilation apparatus for ventilation of the electrical equipment box according to claim 2 formed in the above.   The ventilation device for ventilation of an electric equipment box according to claim 2, wherein the louver wall (9) is formed in an upwardly convex curved shape in a state where the top portion (18) and the bottom wall (19) are smoothly continuous.   The louver wall (9) includes a top portion (18) provided at a plurality of locations in the middle in the left-right direction of the wall (9), and a plurality of skirt walls (19) inclined upward toward each top portion (18). The ventilation device for ventilation of an electric equipment box according to claim 2, which is formed in a continuous waveform.   The ventilation device for ventilation of an electric equipment box according to claim 2, wherein a plurality of rows of louvered walls (9) are provided on the plate wall (8) of the louver plate (2).

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