JP2002010416A - Ventilating air shaft of electrical equipment box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide at ventilating air shaft which is to be used as ventilation path of V-shaped cross-section capable of high waterproof effect at a lower cost. SOLUTION: Extenral louver 3 is located at the outer surface of a fitting opening 2. An inside louver 4 and an air guide box 5 are located on the inner face of the opening 2. A group of louver walls 11, 14 are formed at both louvers 3, 4 in the inside and the outside. By adjacently locating both the louvers 3, 4 under the condition that inside and outside louver walls 11, 14 are inclined mutually in reverse, the cross-sectional V-shape ventilating path is formed between both the louvers 3, 4. According to this method, the total cost reduction for the ventilation equipment is made possible, in comparison with that of being done by welding multilayer louver frames of cross-sectional V-shape.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ventilating device for ventilation mainly applied to electric equipment boxes such as distribution boards and distribution boards installed outdoors.

[0002]

2. Description of the Related Art This type of ventilation ventilation device is disclosed in
No. 8713 and JP-A-11-275718. There, in order to prevent rainwater from blowing into the electrical equipment box through a ventilation ventilation device in bad weather, the outer surface of the ventilation opening is covered with a louver body with a group of louver walls, and further guided to the inner surface of the ventilation opening A wind box and baffles are provided. The wind guide box is provided with an insect-proof and dust-proof filter, which can catch mist-like rainwater.

[0003]

As described above, in the conventional ventilation device, the louver body blocks the rain wind that is going to enter the room, and the moving direction of the rain wind passing through the louver body is controlled by the air guide box or the baffle plate. Sudden changes are made to separate rainwater and air, and the filter blocks the passage of rainwater, taking in only ventilation air. However, the louver body blocks rainwater only in the direction in which the louver wall intersects with the face of the louver wall, and cannot block rainwater in the direction along the louver wall. Therefore, in a situation where rain wind blows up along the outer wall of the electric device box, it is inevitable that rainwater enters the wind guide box, and it is difficult to obtain a sufficient waterproof action.

[0004] In order to prevent rainwater from being blown, there is a ventilation device in which a louver frame is formed in an inverted V-shape so as to prevent rainwater from entering the wind guide box together with the wind as much as possible (the literature is unknown). According to this ventilation device, since the separation load between raindrops and air in the wind guide box can be reduced, an appropriate waterproof effect can be obtained even under worst weather conditions such as a storm. The problem is that since the louver frame having an inverted V-shaped cross section is formed as an independent member in the form of a strip, each louver frame must be welded and integrated with a square frame-shaped louver base, resulting in an overall manufacturing cost. Will be higher. Since a louver frame having an inverted V-shaped cross section is used as a rainwater shielding material, there is a disadvantage that the front and rear thickness dimensions of the louver body must be large.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a ventilation ventilation device having a high degree of waterproofing function, which can prevent rain wind from directly blowing into a wind guide box even under worst conditions such as a storm. Is to do. It is an object of the present invention to provide a ventilation ventilation device having a high waterproof function as described above at a lower cost. An object of the present invention is to provide an inner louver body and an outer louver body, and to change the shape and characteristics of an air passage formed between both louver bodies by variously changing an assembling form of the two louver bodies. It is another object of the present invention to provide a ventilation ventilation device that can select various use modes according to a use environment.

[0006]

The ventilation ventilation device according to the present invention comprises an outer louver body 3 and an inner louver body 4 which cover a mounting opening 2 provided in a peripheral wall of an electric equipment box;
And The outer louver body 3 and the inner louver body 4 each include a group of louver walls 11 and 14. The inner and outer louver bodies 3 and 4 are arranged adjacent to each other with the respective louver walls 11 and 14 inclined in opposite directions, so that the ventilation passage 26 having a V-shaped cross section is provided between the inner and outer louver bodies 3.4. Is formed.

More specifically, the outer louver body 3 and the inner louver body 4 have the same shape and the same size louver walls 11 and 14, respectively.
It consists of a press-formed product formed in the above.

The inner louver body 4 and the outer louver body 3 are arranged inside and outside with the opening peripheral wall of the mounting opening 2 therebetween. The three louver bodies 3 and 4 and the air guide box 5 disposed inside the inner louver body 4 are fixed to the inner surface of the outer louver body 3 and protrude into the box through the mounting opening 2. Screw shaft 13 and a nut 25 screwed into the screw shaft 13
And fasten with.

The louver walls 1 of the inner and outer louver bodies 3, 4
1 and 14 are arranged adjacent to each other in a C-shape, and both louver bodies 3 and 4
A ventilation passage 26 having a V-shaped cross section is formed therebetween.

[0010]

The outer louver body 3 and the inner louver body 4 are arranged adjacent to each other with the respective louver walls 11 and 14 inclined in the opposite directions, and a cross section V is provided between the inner and outer louver bodies 3 and 4. Since the V-shaped ventilation path 26 is formed, the wind flowing along the louver wall 11 of the outer louver body 3 can be received by the louver wall 14 of the inner louver body 4 and the flow direction thereof can be changed. At this time, the rainwater blown with the wind tends to travel straight by its own kinetic inertia force as shown by a dotted arrow in FIG. 1 and separates from the flow of the wind and adheres to the inner louver wall 14 and flows down. On the other hand, the flow of the wind is largely bent by the inner louver wall 14, so that the momentum is reduced. Therefore, it is possible to prevent the raindrops blown into the outer louver body 3 from directly entering the wind guide box 5, whereby it is possible to prevent rainwater from entering the room indoors through the wind guide box 5, and to provide a high level of waterproofness. A ventilation ventilation device having a function is obtained.

Since the inner and outer louver bodies 3.4 provided with a group of louver walls 11 and 14 form the ventilation passage 26 having a V-shaped cross section, the louver frame having a V-shaped cross section is formed of a shielding material. As compared with the conventional ventilating device described above, the time-consuming welding work can be remarkably reduced, and the cost required for manufacturing the ventilation ventilating device having a high waterproof function can be reduced accordingly. In particular, when the louver walls 11 and 14 of the inner and outer louver bodies 3 and 4 are formed to have the same shape and the same size with the same press die, the cost required for press working of the louver bodies 3 and 4 can be reduced. Thus, the production cost of the ventilation ventilation device can be further reduced.

The inner and outer louver bodies 3 and 4 and the wind guide box 5 are disposed inside and outside with the mounting opening 2 therebetween, and a screw shaft 13 fixed to the outer louver body 3 and a nut 25 screwed into the screw shaft 13 According to the mounting structure for integrally fastening and fixing the three members, the mounting structure of each member to the mounting opening 2 is unified,
The structure of the ventilation device for ventilation can be simplified, and the labor for mounting the device can be saved.

The louver walls 1 of the inner and outer louver bodies 3, 4
According to the ventilation ventilation device in which the air passages 1 and 14 are arranged adjacent to each other in a C shape and the air passage 26 is formed in an inverted V-shaped cross section, the vertically adjacent air passages 26 are formed between the inner and outer louver walls 11 and 14. Since they communicate with each other through the gap 30, the rain and wind blowing through each ventilation path 26 can interfere with each other to reduce the momentum for blowing out the rain and the rain water that is to enter the wind guide box 5 by that much The amount of is reduced.

Since the outer louver body 3 and the inner louver body 4 form a ventilation passage 26 having a V-shaped cross section therebetween, the ventilation can be achieved by reversing the assembling posture of the inner louver body 4 vertically or inwardly or outwardly. The shape and characteristics of the passage 26 can be changed in various ways, so that a ventilation ventilation device can be configured that can exert different functions while using the same components. If a plurality of types of inner louver bodies 4 having different sizes, shapes, and the like of the louver walls 14 are prepared, a ventilation device having various ventilation characteristics can be configured according to a use environment of the ventilation ventilation device.

[0015]

1 to 4 show an embodiment of a ventilation ventilation device according to the present invention. In FIG. 3, the ventilation device is a mounting opening (venting opening) 2 opened on the peripheral wall 1 of the electric equipment box.
In contrast, the outer louver body 3 mounted from the outdoor side, the inner louver body 4 mounted from the indoor side, the wind guide box 5, and the three members 3, 4, and 5 are disposed between the joint surfaces. It is composed of three rubber packings 6 and a filter 7 arranged at the upper surface opening of the air guide box 5 if necessary.

2 and 3, the outer louver body 3
Is formed of a square press-formed product, and the peripheral side wall 10 is formed by bending toward the peripheral wall 1 along the four peripheral portions. The shape of the opening of this peripheral side wall 10 is
Is set to be slightly larger than the opening shape. On the face wall of the outer louver body 3, a group of louver walls 11 which are inclined upward toward the indoor side are formed by cutting and raising, and between these louver walls 11, upper and lower multi-stage ventilation holes 12 are opened.
The cut-out dimension of each louver wall 11 is set to be equal to or slightly smaller than the front-rear dimension of the peripheral wall 10. A total of eight screw shafts 13 are welded to the inner surface of the outer louver body 3 as shown in FIG. The lower peripheral side wall 1
Drain grooves 17 are cut out at two places on the left and right sides of 0.

The inner louver body 4 is made of a flat press-formed product, and a group of louver walls 14 which are inclined upward toward the outdoor side are cut and formed on the plate surface. A multi-stage ventilation port 15 is opened.
The group of louver walls 14 has the same shape and size as the louver walls 11 of the outer louver body 3. That is, both louver walls 11
14 is press-formed using the same molding die. As shown in FIG. 4, an insertion hole 16 for the screw shaft 13 is provided near the periphery of the plate surface of both louver bodies 4.

The air guide box 5 comprises a square mounting frame 19 and a wind guide 20 having a U-shaped cross section welded to the indoor side of the mounting frame 19. The mounting frame 19 is open to the outdoors, and the air guide 20 is open to the upper surface. Mounting frame 1
An insertion hole 21 for the screw shaft 13 is provided along the peripheral edge of the screw shaft 9. The air guide body 20 includes a pair of left and right side walls 22, an inner end wall 23 connecting the both side walls, and a drainage wall 24 inclined downward from the lower end of the inner end wall 23 toward the outdoor side.

The filter 7 is composed of a unit component in which a sheet such as a foam or a porous body which is easily ventilated is loaded into a metal holding frame. It is fixed with screws screwed near the upper end of 23 (see FIG. 3). Each rubber packing 6 is formed in a rectangular frame shape, and a screw shaft 13 is formed along the peripheral edge of the frame.
Insertion holes are provided.

Each of the above components is attached to the mounting opening 2 in the following procedure.
Attach to The rubber packing 6 is fitted into the screw shaft 13 of the outer louver body 3, and each screw shaft 13 is attached to the mounting opening 2 from outside.
At the same time to protrude indoors, and at the same time
Then, the peripheral side wall 10 is applied to the peripheral wall of the mounting opening 2. While maintaining this state, the rubber packing 6 and the inner louver body 4 and the rubber packing 6 and the air guide box 5 are respectively inserted into the screw shaft 13 and temporarily assembled. At this time, the inner louver body 4 is assembled such that the louver wall 14 is inclined in the opposite direction to the louver wall 11 of the outer louver body 3. Finally, a washer and a nut 25 are assembled on the screw shaft 13, and the nut 25
By tightening the two louver bodies 3 and 4 and the air guide box 5
The three are fastened and fixed.

When the ventilation device is mounted in the mounting opening 2, the multi-stage louver walls 11 and 14 which are adjacent inside and outside are provided.
As a result, an air passage 26 having an inverted V-shaped cross section is formed between the inner and outer louver bodies 3 and 4. Therefore, there is no rain wind passing through the ventilation path 26, especially the rain wind rising upward, as shown in FIG. 1, except for traveling along an inverted V-shaped path. It collides with and adheres to the inner louver wall 14 and is separated from air. Therefore, it is possible to prevent raindrops from being carried by the wind and directly blown into the wind guide box 5. Rainwater adhering to the inner louver wall 14 is finally received by the drain wall 24, flows down to the inner surface of the outer louver body 3, and is discharged through the drain groove 17.

FIG. 5 shows another embodiment of the present invention in which the arrangement of the inner and outer louver walls 11 and 14 is changed. There, the upper end of the inner louver wall 14 is located slightly above the upper end of the outer louver wall 11, and the upper ends of the two louvers 11 and 14 slightly overlap inward and outward. 14 differs from the previous embodiment in that 14 are arranged adjacent in a C shape. Others are the same as the previous embodiment,
The same members are denoted by the same reference numerals, and description thereof will be omitted. The same applies to other embodiments described below.

As described above, the inner and outer louver walls 11 and 14 are provided.
Are arranged adjacent to each other in a C-shape, a small gap 30 is formed between the louver walls 11 and 14, and the upper and lower ventilation paths 26 communicate with each other via the gap 30. Therefore, in a situation where the rain wind blows upward, most of the rain wind moves along the reverse V-shaped ventilation path as in the previous embodiment.
Part of the air passes through the gap 30 to the upper ventilation passage 26 and interferes with the rain breeze passing through the upper ventilation passage 26. Therefore, in each ventilation path 26, the force of the rain breeze is cut off by the wind spouting from the gap 30, and further, the flow toward the inner and outer louver walls 14 is obstructed, so that the rainwater tries to enter the wind guide box 5. Can be more effectively prevented. The insertion hole 1 of the inner louver body 4
When the long louver 6 is formed in the vertical direction, the louver walls 11 and 14 can be arranged in the same manner as described above by shifting the fixing position of the inner louver body 4 up and down.

FIG. 6 shows still another embodiment of the present invention. In this case, the inner louver body 4 that can be easily processed was used as the outer louver body 3. Further, an outer frame 31 to be assembled on the outdoor side of the mounting opening 2 is separately provided, and the screw shaft 1 is provided on the inner surface thereof.
3 was fixed. The outer louver body 3 is the same component as the inner louver body 4, but the inner and outer louver walls 11 and 14 can be inclined in opposite directions by reversing the mounting posture thereof. In this embodiment, a spacer frame 32 is interposed between the inner and outer louver bodies 3 and 4 to prevent the inner and outer louver walls 11 and 14 from coming into contact with each other.

FIG. 7 shows another embodiment of the louver wall 14 of the inner louver body 4. Here, the lower edge outdoor side of each louver wall 14 was bent upward to form the gutter portion 34.
The gutter portion 34 is formed over substantially the entire length of the lower edge of the louver wall 14, and receives rainwater flowing down along the louver wall 14 to flow down at the left and right ends of the ventilation port 15. If necessary, the lower edge of the louver wall 14 can be inclined downward toward one side end, and the rainwater collected by the gutter portion 34 can flow down at one side end of the ventilation port 15. Also, a plastic strip is attached to the lower edge of each louver wall 14 so that
Can be formed.

In the above embodiment, the louver walls 11 and 14 are used.
Has been described in the case of being formed in a multi-stage up and down,
This is not necessary, and the louver walls 11 and 14 may be arranged so as to form rows in the left-right direction in a vertically long posture. In addition, the louver walls 11 and 14 can be formed by stamping out a cross section in a partial arc shape, for example, and the cross section does not need to be flat. In some cases, the cross section may have a rectangular shape.
May be formed in a substantially V-shaped cross section. The inner louver body 4 may be formed of a plastic molded product. In the embodiment described with reference to FIG. 5, the vertical passage of the louver wall 14 of the inner louver body 4 is set to be approximately half of the adjacent pitch of the louver wall 14 in the embodiment described with reference to FIG. This includes the case where it is set to.

[Brief description of the drawings]

FIG. 1 is an enlarged view of a portion A in FIG.

FIG. 2 is a partially cutaway front view of the ventilation device for ventilation.

FIG. 3 is a sectional view taken along line CC in FIG. 2;

FIG. 4 is an exploded sectional view of the ventilation ventilation device.

FIG. 5 is a cross-sectional view showing another embodiment of the ventilation ventilation device.

FIG. 6 is a cross-sectional view showing still another embodiment of the ventilation ventilation device.

FIG. 7 is a perspective view showing a modified example of the louver wall.

[Description of Signs] 2 Mounting opening 3 Outer louver body 4 Inner louver body 5 Wind guide box 13 Screw shaft 25 Nut 26 Ventilation path

Claims (4)

[Claims] An outer louver body and an inner louver body for covering a mounting opening provided in a peripheral wall of the electric equipment box;
The outer louver body 3 and the inner louver body 4 are provided with a group of louver walls 11 and 14, respectively. The inner and outer louver bodies 3.4 are provided with respective louver walls 1 and 2.
Ventilation ventilation for an electric device box, characterized in that a ventilation passage 26 having a V-shaped cross section is formed between both louver bodies 3 and 4 so that the ventilation passages 1 and 14 are arranged adjacent to each other in a state of being inclined in opposite directions. apparatus. 2. The outer louver body 3 and the inner louver body 4 are:
The ventilation device for ventilating an electric device box according to claim 1, comprising press-formed products formed by louver walls 11 and 14 having the same shape and the same size. 3. The inner louver body 4 and the outer louver body 3 are:
The three louver members 3, 4 and the air guide box 5 disposed inside the inner louver member 4 are arranged inside and outside with the opening peripheral wall of the mounting opening 2 therebetween. 3. The electric device box according to claim 1, wherein a plurality of screw shafts fixed to the inner surface and projecting into the box through the mounting opening are fastened and fixed by nuts screwed into the screw shafts. Ventilation equipment for ventilation. 4. The louver walls 11, 14 of the inner and outer louver bodies 3, 4 are arranged adjacent to each other in a C-shape to form the louver bodies 3.
4. The ventilation device according to claim 1, wherein a ventilation passage having a V-shaped cross section is formed between the four.