JPH04128017U - ventilation system - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a ventilation system that prevents water droplets from falling into the inside of a box even if dew condensation occurs in the ventilation system. [Structure] In a switchgear in which a heat-generating device such as a transformer is housed inside a box, an intake port is provided on the door of the box, and a ventilation device is provided on the roof to ventilate the inside of the box. The upper surface of the rain cover of the ventilation device is inclined, and a moisture-absorbing material such as glass wool is adhered to the entire lower inner circumference of the ventilation tube of the ventilation device.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This idea was developed to cover the roof of switchgear housing heat-generating equipment such as transformers. Regarding ventilation equipment provided.

0002

[Conventional technology]

Conventionally, as shown in FIG. In the switch gear 1, an intake port 4 is provided in the door 21 portion of the box body 2, and the roof 22 A ventilation device 5 is provided in the section to ventilate the inside of the box body 2 as shown by the arrow in the figure. I'm doing it. The upper part of the box body 2 has a so-called double ceiling structure consisting of a roof 22 and a ceiling 23. It is constructed.

0003 By the way, as shown in FIG. 2, the ventilation device 5 is a rain cover with a horizontal upper surface. 51 and a ventilation cylinder 52.

0004

[Problem that the idea aims to solve]

When the outside temperature suddenly drops due to sudden rain during the day, the box 2 When the warmed air inside is exhausted to the outside through the ventilation device 5, the rain cover 51 and the inner surface of the vent cylinder 52 and are rapidly cooled, causing dew condensation in these areas. In addition, two Due to the heavy ceiling structure, there is no condensation on the inner surface of the ceiling 23.

[0005] In the case of the conventional ventilation system 5, if there is significant dew condensation, the top surface of the rain cover 51 will become wet. Since the top surface is flat, water droplets that form on the top surface will fall there, and Water droplets generated in the cylinder 52 will fall from the lower end along the vertical surface.

[0006] Water droplets then fall onto the equipment, conductors, and insulators stored inside the box body 2. As a result, rust and deterioration of insulation occur, leading to serious accidents. There is.

[0007] This idea was designed with the above points in mind, so that even if condensation occurs in the ventilation system, water droplets will be removed from the box. The purpose is to provide a ventilation system that prevents objects from falling into the interior of the room.

[0008]

[Means to solve the problem]

In order to solve the above problem, the ventilation system of this invention has a transformer etc. inside the box. The heat-generating equipment is stored, and an intake port is installed on the door of the box, and a ventilation system is installed on the roof. In a switchgear in which the inside of the box is ventilated by providing a The upper surface of the rain cover is sloped, and the entire lower part of the inner surface of the ventilation pipe of the ventilation device is It is constructed by pasting a moisture-absorbing material such as glass wool on the top.

[0009]

[Effect]

The ventilation system of this invention configured as described above has a sloped top part of the rain cover. Therefore, water droplets formed on the upper surface move down to the lower slope, and Since it falls to the outside of the box from its lower end, it does not fall into the inside of the box.

0010 In addition, moisture-absorbing material such as glass wool is attached to the entire lower part of the inner surface of the ventilation cylinder, so Water droplets formed in the ventilation tube are retained by the moisture-absorbing material even if they fall down a vertical surface. to prevent it from falling inside the box. This water evaporates during the day when the outside temperature is high.

[0011]

【Example】

An embodiment of this invention will be described below with reference to FIG. In addition, in Figure 1 2 and 3 indicate the same or corresponding parts. The difference from the conventional one is that the top surface of the rain cover 51 of the ventilation system 5 is sloped. It is constructed by pasting a moisture-absorbing material 53 such as glass wool around the entire lower inner surface of the ventilation cylinder 52. That's what I did.

0012 In addition, the moisture absorbing material 53 is made of glass wool, cotton, cloth, sponge, etc. that absorbs and retains moisture. It is fine as long as it is possible.

[0013]

[Effect of the idea]

Since this device is configured as explained above, it achieves the effects described below. play. Even if condensation occurs in the ventilation system, water droplets will not fall into the inside of the box, preventing rust and damage. It is possible to prevent the deterioration of edge materials and prevent the occurrence of accidents.

[Brief explanation of drawings]

FIG. 1 is a sectional view of one embodiment of the ventilation device of this invention.

FIG. 2 is a cross-sectional view of a conventional ventilation device.

FIG. 3 is a schematic side view of the switchgear.

[Explanation of symbols]

1 Switch gear 2 Box body 21 Door 22 Roof 3 Transformer 4 Intake port 5 Ventilation equipment 51 Rain cover 52 Ventilation cylinder 53 Moisture absorbing material

Claims (1)

[Scope of utility model registration request] [Claim 1] A heat-generating device such as a transformer is housed inside the box, and an intake port is provided on the door of the box, and a ventilation device is provided on the roof to ventilate the inside of the box. A ventilation device for a switchgear, characterized in that the upper surface of the rain cover of the ventilation device is inclined, and a moisture-absorbing material such as glass wool is adhered to the entire lower inner circumference of the ventilation tube of the ventilation device.