JP2003274523A - Ventilator for electrical apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve ventilating of a louver part at a ventilating port formed on a tubular body, while holding a function of protecting an electrical apparatus such as a distribution board from hazadous actions of sticking a rod or the like from the outside of a casing of an electric apparatus such as a distribution board. <P>SOLUTION: This ventilator, formed by mounting a plurality of V-shaped angle louvers 6 in rows on the ventilating port 4 of an outer wall panel 3 of the electrical apparatus casing, is disposed with a venting opening 6c, in such a range that a metal rod 7 or the like cannot enter inside the louver 6, on the top of an outlet side blade 6b of the angle louver 6. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ventilator for electric equipment containing a heating element, and more particularly to improvement of a louver portion of a vent provided in an outer wall panel of a power distribution tower casing.

[0002]

2. Description of the Related Art Conventionally, many transformers for distribution towers have been installed adjacent to a cubicle in a bare state or covered with a wire mesh, but in recent years, appearance improvement and fire prevention,
In addition, a structure has been adopted in which a transformer is housed in a cubicle for the purpose of protecting from anti-social vandalism caused by the intrusion of foreign matter such as a stick from the outside. However, since the transformer is a high heat generating device and requires a large amount of heat exchange, a ventilation port is provided on the outer wall panel of the cubicle around the radiator for intake and exhaust of cooling air. In addition, the ventilation port is equipped with a mountain louver to which metal rods and the like cannot be inserted in order to improve the appearance, prevent foreign matter from entering, and prevent antisocial vandalism such as damage to the radiator. ing.

FIG. 4 is a perspective view showing an example of a power distribution tower in which a transformer as a heating element is housed in a cubicle. In the figure, 1 is a cubicle, 2 is a transformer built in the cubicle 1, and 3 is a cubicle. Is an outer wall panel provided around the radiator of the transformer 2 and 4 is an outer wall panel 3
Ventilation openings are provided in the upper and lower parts of the. In addition, 5 has shown the flow of cooling air.

Next, the operation will be described. The air 5 entering from the lower ventilation port (intake port) 4 exchanges heat between the radiators of the transformer, and the upper ventilation port (exhaust port) 4
At this time, the greater the amount of air 5 flowing, the more efficiently the transformer is cooled, and the distribution tower can be made smaller and less expensive.

Next, FIG. 5 is a cross-sectional view showing details of a ventilation port 4 portion of a conventional outer wall panel 3, 3 is an outer wall panel of a cubicle, 4 is a ventilation port provided in the outer wall panel 3, 6 Indicates a V-shaped chevron louver arranged in the ventilation port 4.

FIG. 6 is an enlarged sectional view of the chevron louver 6 and a view for explaining its operation. In FIG. 6, 6a is an air inlet side blade of the chevron louver 6, 6b is an air outlet side blade, and 7 is a metal rod. A line assuming insertion of etc. (indicated by a chain double-dashed line) is shown. In addition, 5 shows the flow of cooling air. As shown in the figure, even if a non-receiver tries to damage the radiator and inserts a metal rod 7 into the radiator, the non-receiver is blocked by the chevron louvers 6 arranged at proper intervals and angles to prevent invasion of the inside. I am trying to prevent it. On the other hand, the cooling air 5 rises diagonally along the air inlet side blade 6a of the chevron louver 6 as shown by the solid arrow, but the air is changed at the top of the louver 6 peak. The blade descends along the outlet blade 6b, changes its direction again when passing through the louver, and rises.

[0007]

As described above, the conventional Yamagata louver has a function of protecting it from antisocial vandalism, but has the following problems in terms of ventilation cooling action. . (1) The direction of the air passing through the chevron louver changes twice abruptly, so the ventilation resistance is large and the air flow is obstructed. As a result, sufficient ventilation cannot be achieved, which hinders the cooling of the transformer. Sometimes. (2) In order to secure the required ventilation, it is conceivable to increase the ventilation area, but if this is done, it will exceed the ventilation area specified in the Fire Prevention Ordinance of the Fire Department and will be accepted as a product. It will not be possible. (3) There is also a method of reducing the heat generation amount of the transformer in order to keep the ventilation temperature within the allowable temperature rise even if the ventilation volume is insufficient.
That would make the device larger and more expensive.

The present invention has been made in order to solve the above-mentioned problems, and a ventilator provided with a louver having improved ventilation performance in a mode that does not impair the defense function against antisocial vandalism. Aim to get.

[0009]

A ventilator according to claim 1 of the present invention is provided with a plurality of V-shaped chevron-shaped louvers arranged in a row at a ventilation opening provided in an outer wall panel of a cubicle for accommodating a heating element. At the top of the exit blade of the chevron louver, a vent is provided to the top of the exit blade of the louver to the extent that the rod inserted from the outside is blocked by the edge of the louver and cannot enter the inside. Is designed to allow passage without changing the direction of flow.

A ventilator according to a second aspect of the present invention is such that the length of the outlet side blade of the chevron louver is made shorter than the length of the inlet side blade, and a continuous ventilation gap is provided at the top of the louver. Is.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiment 1. 1 is an enlarged cross-sectional view showing a louver portion according to Embodiment 1 of the present invention, and is a view corresponding to FIG. 6 of the above-mentioned conventional example. FIG. 2 is also a perspective view of the louver portion, and is a partial perspective view showing a single louver. Note that the configuration of the entire power distribution tower including the transformer, which is a heating element, appears as in FIG. Hereinafter, FIG.
The configuration of the ventilation port portion of the main part will be described in detail with reference to FIG. In the figure, 6 is an inverted V-shaped louver,
Reference numeral 6a denotes an inlet side blade thereof, 6b denotes an outlet side blade thereof, and 6c denotes a rectangular vent hole arranged in a lateral direction on the top of the outlet side blade 6b. As shown in FIG. 1, even if an attempt is made to insert a metal rod 7 (shown by a chain double-dashed line) into the louver 6 from the outside of the outer wall panel 3, the vent hole 6c can be provided with any edge of the louver. It is set within a range in which it cannot be penetrated by being interrupted and therefore has a sufficient defense function against anti-social vandalism. In addition, as shown by the solid arrow in FIG. 1, the flow of the cooling air 5 is Unlike the above-mentioned conventional example, the louver 6 does not turn downward at the top of the louver 6 and passes through the vent hole 6c while maintaining an upward flow state. Therefore, the cooling air can smoothly pass through the louver portion of the ventilation port without receiving the ventilation resistance, and the cooling action can be improved.

Embodiment 2. Next, FIG. 3 shows a second embodiment.
In the present embodiment, in place of the vent hole 6c provided in the first embodiment, the louver 6 itself is divided into an inlet side blade 6a and an outlet side blade 6b, and one of the air outlets is shown. By setting the length of the side blades 6b shorter than the length of the inlet side blades 6a and supporting them in an inverted V shape through the support columns 8, the same shape as in the above-described first embodiment is provided on the mountain top portion of the louver 6. Further, a continuous air gap 6d is provided in a range where the metal rod 7 cannot be inserted. With the above configuration, it becomes possible to simultaneously provide the same ventilation performance and antisocial defense function as shown in FIG.

[0013]

As described above, the ventilator for electric equipment according to the present invention is provided with a vent hole or a ventilation gap so that air can easily flow in a range where a metal rod or the like does not enter the louver. It is possible to obtain a ventilator with improved ventilation performance without impairing the function of protecting from vandalism.

[Brief description of drawings]

FIG. 1 is an enlarged cross-sectional view of a chevron louver according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing one mountain of a mountain louver according to the first embodiment of the present invention.

FIG. 3 is a perspective view showing a part of a louver according to a second embodiment of the present invention.

FIG. 4 is a perspective view showing an example of a power distribution tower including a transformer.

FIG. 5 is a cross-sectional view showing an arrangement state of louvers of a conventional ventilation port section.

6 is an enlarged cross-sectional view of the conventional chevron-shaped louver in FIG.

[Explanation of symbols]

1 cubicle, 2 transformers, 3 exterior wall panels, 4
Ventilation port, 5 Air flow, 6 Louver, 6a Inlet blade, 6b Outlet blade, 6c Vent, 6d
Ventilation gap, 7 metal rod.

Claims (2)

[Claims] 1. A ventilator comprising a plurality of V-shaped chevron louvers arranged in a row at a ventilation port provided on an outer wall panel of a cubicle for accommodating a heating element, at the top of an outlet blade of the chevron louvers. The structure is such that a rod inserted from the outside is blocked by the edge of the louver and a vent is provided in a range that cannot enter the inside, and the air flowing along the inlet blade can pass without changing the flow direction. Ventilation device for electrical equipment characterized by the above. 2. The electricity according to claim 1, wherein the length of the outlet side blade of the chevron louver is formed shorter than the length of the inlet side blade, and a continuous ventilation gap is provided at the top of the louver. Equipment ventilation.