JPH0641315U - Closed switchboard ventilation system - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent dust from entering the board and improve noise resistance and strength. A side wall composed of an inner plate 8 and an outer plate 9, a side wall space 10 formed between the inner plate 8 and the outer plate 9, and a side wall space 1
0 which is formed at the upper end of 0 and communicates with the outside air to cover the upper side, an inner plate opening 12 which is formed at the lower part of the inner plate 8 and communicates with the inside of the plate, a top plate 17 and a ceiling above the top plate 17. Board cover 18
, A ceiling space 19 formed between the top plate 17 and the top cover 18, a top plate opening 20 formed in the top plate 17 and communicating with the interior, and a side end of the ceiling space 19. And an exhaust port 21 that is communicated with the outside air.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a closed switchboard ventilation device that prevents dust from entering the panel and improves noise resistance and strength.

[0002]

[Prior art]

 The conventional ventilation device for a closed switchboard has an intake port formed at the bottom of a side wall made of a single iron plate, and an exhaust port formed on the ceiling so that the outside air that flows in from the intake port by natural convection or a fan is exhausted to the exhaust port. I'm trying to release it from.

[0003]

[Problems to be solved by the device]

 In the case of the conventional ventilation device, since the intake port is formed in the lower part, there is a problem that dust on the floor surface and in the vicinity thereof easily enter the board. It is also possible to attach a filter to the intake port in order to prevent dust from entering the board, but this will block intake and reduce ventilation efficiency.

Further, since the side wall is a single plate, there is a problem that noise resistance performance and strength are low. The present invention has been made in consideration of the above points, and an object of the present invention is to provide a closed switchboard ventilation device that prevents dust from entering the inside of the board, and has improved noise resistance and strength.

[0005]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, a closed switchboard ventilation device of the present invention includes a side wall including an inner plate and an outer plate, a side wall space formed between the inner plate and the outer plate, and an upper end of the side wall space. Air inlet that is formed and communicates with the outside air and covers the upper side, an inner plate opening that is formed in the lower part of the inner plate and communicates with the inside of the board, and a ceiling composed of the top plate and the top plate cover above the top plate. A ceiling space formed between the plate and the top cover, a top plate opening formed in the top plate and communicating with the inside of the board, and an exhaust port formed at a side end of the ceiling space and communicating with the outside air Is.

[0006]

[Action]

 In the closed switchboard ventilation device of the present invention configured as described above, since the intake port is formed at the upper end of the side wall space, dust on the floor surface and its vicinity does not enter the panel, and the inner plate Since the side wall is formed by two plates, the outer plate and the outer plate, it is difficult for noise from the outside to enter the panel, and noise from the panel does not easily exit to the outside, improving the noise resistance performance and increasing the strength. .

[0007]

【Example】

 One embodiment will be described with reference to FIGS. 1 to 3. In these figures, 1 is a closed switchboard, 2 is a frame body of the switchboard 1, 3, 4, 5 and 6 are front doors, rear walls, right walls and left walls forming the side walls of the switchboard 1, respectively. It is attached to the frame body 2 via the packing 7.

Next, the side wall will be described. 8 is an inner plate, 9 is an outer plate, 10 is a side wall space formed between the inner plate 8 and the outer plate 9, 11 is an intake port formed at the upper end of the side wall space 10 and communicates with the outside air, and 12 is an inner side. An inner plate opening formed in the lower part of the plate 8 and communicating with the inside of the plate, 13 a side plate covering the side parts of the inner plate 8 and the outer plate 9, and 14 a bottom plate covering the bottom parts of the inner plate 8 and the outer plate 9. The side wall is open only at the intake port 11 and the inner plate opening 12, and the other side is covered.

Reference numeral 15 is a bottom plate of the switchboard 1, 16 is a ceiling composed of a top plate 17 and a top cover 18 above the top plate 17, and 19 is formed between the top plate 17 and the top cover 18. A ceiling space, 20 is a top plate opening formed in the central portion of the top plate 17 and communicates with the inside of the board, 21 is an exhaust port formed at four side ends of the ceiling space 19 and is connected to the outside air, and 22 is an exhaust port 21. The fan is a scraped fan, and the peripheral edge portion of the ceiling 16 projects above the intake port 11 of each side wall and covers the upper side of the intake port 11.

The flow of air is such that the outside air is sucked in through the intake ports 11 in the surroundings, moves downward in the side wall space 10, enters the board through the inner plate openings 12, and flows upward in the board. It enters the ceiling space 19 through the plate opening 20, moves in all directions in the ceiling space 19, and is discharged to the outside from each exhaust port 11. Therefore, the cooling surface is enlarged, the cooling efficiency is good, and the possibility of heat buildup inside the panel is extremely low.

In the above-mentioned embodiment, the fan 22 is provided for forced ventilation, but in the case of natural convection ventilation, it is not necessary to provide the fan 22. Moreover, although each side wall of the front door 3, the rear wall 4, the right wall 5, and the left wall 6 has been described as a double wall including the inner plate 8 and the outer plate 9, the double wall is not all four walls, but one wall. Or may be applied to 3 walls.

[0012]

[Effect of device]

 Since the present invention is configured as described above, it has the following effects. The side wall is composed of an inner plate 8 and an outer plate 9, a side wall space 10 is formed between both plates 8 and 9, and an intake port 11 is formed at the upper end of the side wall space 10 so as to communicate with the outside air and cover the upper side. Since the inner plate opening 12 communicating with the inside of the panel is formed in the lower part of the inner plate 8, dust on the floor surface and its vicinity does not enter the panel, and since the side wall is a double wall, the It is difficult for the noise in the panel to enter the panel, and the noise from the panel does not easily flow to the outside, improving the noise resistance performance and increasing the strength.

Moreover, the ceiling 16 is composed of a top plate 17 and a top plate cover 18 above the top plate 17, and a ceiling space 19 is formed between the top plate 17 and the top plate cover 18, Since the top plate opening 20 that communicates with the inside of the panel is formed and the exhaust port 21 that communicates with the outside air is formed at the side end of the ceiling space 19, the air flow is smooth and efficient ventilation is achieved even by natural convection. can do.

[Brief description of drawings]

FIG. 1 is a schematic side view of an embodiment of the present invention.

FIG. 2 is a partially removed plan view of FIG.

FIG. 3 is a perspective view of a side wall of FIG.

[Explanation of symbols]

 8 Inner plate 9 Outer plate 10 Side wall space 11 Intake port 12 Inner plate opening 16 Ceiling 17 Top plate 18 Top plate cover 19 Ceiling space 20 Top plate opening 21 Exhaust port

Claims (1)

[Scope of utility model registration request] 1. A side wall including an inner plate and an outer plate, a side wall space formed between the inner plate and the outer plate, and an upper end of the side wall space communicating with the outside air and covering the upper side. An intake port, an inner plate opening formed in the lower part of the inner plate and communicating with the inside of the plate, a ceiling composed of a top plate and a top plate cover above the top plate, the top plate and the top plate cover. A closed switchboard ventilation device comprising a ceiling space formed between the ceiling space, a top plate opening formed in the top plate and communicating with the inside of the board, and an exhaust port formed at a side end of the ceiling space and communicating with the outside air.