JPH04126662A - Blast duct for rolling stock - Google Patents

Abstract

PURPOSE:To easily eliminate the water drops included in cooled wind thus preventing electric apparatus carried on the vehicle from defecting by providing a fitting type baffle board in the middle of the blast duct, which is provided between a port for intaking air for cooling the electric apparatus and the electric apparatus. CONSTITUTION:A baffle board 2 is installed in the middle of a blast duct 1 for blasting cooled wind from air intake port for air cooling electric apparatus. This baffle board 2 has such a shape that a plurality of channels(receiving boards) 3, 3... whose cross section is generally like U-shape are arranged alternately so as to repeat U turn as wind passages resulting in dividing the inside of the duct into a plurality of narrow passage full of twists and turns. In addition, this baffle board 2 is diagonally fitted in the duct 1 so as to partition the duct 1 by the baffle board. This constitution lets the water drops 7 included in the cooled wind flowing from the windward stick to the receiving boards 3, 3... to separate the water drops from the wind and flow from the upper section to down section thus discharging them outside from the drain hole 5 in the lower section.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a water droplet removal device for a ventilation duct for a railway vehicle.

(Prior art) Various electrical equipment is installed on a railway vehicle, and in order to cool the heat generated by the operation of these equipment with air, a ventilation duct is provided between the air intake and the electrical equipment 8. ing.

Normally, the outside temperature is low in the winter and high in the summer, and increases and decreases depending on the season, but the temperature of the ventilation ducts for railway vehicles also depends on the season.

By the way, in the case of a long tunnel such as a front tunnel, the temperature inside the tunnel is approximately constant throughout the year, and is approximately 20° to 25° C. in the front tunnel.

In winter, when a vehicle enters a tunnel, the air duct, which has become cold due to exposure to low outside temperatures, is exposed to the relatively high temperature air inside the tunnel, causing dew condensation to appear on the inside and outside surfaces of the air duct. If the above phenomenon persists in a long tunnel, the condensation on the inner surface of the air duct becomes water droplets that flow together with the cooling air and reach electrical equipment.

In cold regions, the outside temperature in winter is often below freezing, so the temperature difference between the inside temperature of the tunnel and the outside temperature becomes extremely large, making the above phenomenon more likely to occur.

(Problem to be Solved by the Invention) When the above-mentioned condensation condition persists in a long tunnel, etc., the condensation becomes water droplets, and the water droplets flow with the cooling air and reach electrical equipment, causing damage to the electrical equipment such as deterioration of insulation. It is the cause of this.

Also, in the summer, the temperature inside the tunnel is lower than the outside temperature, so dew condensation occurs when exiting a long tunnel, but this temperature difference is small and does not pose a problem.

In view of the above-mentioned points, an object of the present invention is to separate water droplets caused by dew condensation in winter from the cooling air and discharge the same to the outside of the ventilation duct, thereby allowing only the cooling air to reach electrical equipment.

[Structure of the invention]

(Means for Solving the Problems) For the above-mentioned purpose, the present invention provides a lattice made by combining a plurality of elongated receiving plates (channels) each having a U-shaped cross section over the longitudinal section of the duct in winter. A shaped baffle plate is installed at an angle, and this baffle plate is removed in the summer.

(Function) With the above configuration, when the cooling air containing water droplets generated due to dew condensation flows and hits the baffle plate, the water droplets adhere to the baffle plate, and the cooling air passes between the plates and is sent to the electrical equipment. Water droplets adhering to the board run down the sloped board and are drained out through the drain hole.

The presence of the baffle plate increases pressure loss and reduces the amount of cooling air, but since the temperature is low in winter, the effect on cooling electrical equipment is small and does not pose a problem.

In addition, in the summer, the baffle plate is removed, so the duct becomes a normal air duct, and a sufficient amount of cooling air is blown.

(Example) The present invention will be explained based on the example shown in FIGS. 1 and 2.

A baffle plate 2 is installed in the middle of a blower duct 1 that blows flat cooling air for cooling electrical equipment from an air intake.

The baffle plate 2 is basically a channel with a U-shaped cross section (
3.3...Multiple pieces are arranged in a staggered combination to create a shape that repeats U-turns as a wind passage, and as a result, the inside of the duct is divided into multiple winding narrow passages. do.

When this baffle plate 2 is installed obliquely into the duct, the duct is partitioned off by the baffle plate 2.

Although such a structure may be used as a baffle plate, in consideration of cases where it is inconvenient to have a baffle plate (such as during the summer), the baffle plate should be made to be easily attached and detached.

That is, a cassette type duct 4 is constructed by cutting out the duct portion provided with the baffle plate, and a drain hole 5 is provided at the bottom of this cassette.

The cassette type duct 4 equipped with this baffle plate is used as a winter cassette, and a separate cassette type duct without a baffle plate is prepared as a summer cassette 6, and these cassettes can be inserted and removed in the middle of the duct. Make it.

A cassette type duct 4 or 6 like this is placed in the middle of the duct.
If the winter cassette is inserted in the winter, the cooling air containing water droplets 7 flowing from upwind will hit the receiving plate, and the water droplets will adhere to the receiving plate 3.3... Furthermore, the wind passes through the gap between the receiving plates 3 and 3 while adhering water droplets to the receiving plates, and becomes wind that separates the water droplets 7 and flows downwind.

The water droplets adhering to the receiving plate 3.3... flow down from top to bottom due to the component force of the wind due to the downward slope of the receiving plate 3 and the own weight of the water droplet 7, and flow down from the top to the bottom of the winter cassette 3. The water is discharged to the outside from the drain hole 5. In summer compared to winter,
Since the temperature difference inside and outside the tunnel is small and the degree of occurrence of dew condensation is low, the winter cassette 4 is replaced with the summer cassette 6.

Since the summer cassette 6 does not have a baffle plate, the cooling air can flow without any obstruction and can supply sufficient air to electrical appliances.

As another example, if there is no problem with the winter cassette 4 being installed throughout the year, it is also possible to assemble and fix the receiving plates 3, 3, etc. directly to the ventilation duct 1 without having to remove them. This is a moot point.

Furthermore, in this embodiment, the winter cassette 4 or the summer cassette 6 is replaced at the bottom of the cassette, but depending on the equipment arrangement of the vehicle, it is also possible to replace the cassette at the top or side. be.

〔Effect of the invention〕

According to the present invention, water droplets contained in cooling air can be easily removed in a ventilation duct for a railway vehicle, thereby preventing damage to on-board electrical components and improving the reliability of the railway vehicle.

[Brief explanation of drawings]

FIG. 1 is a plan sectional view of a blower duct according to the present invention, FIG. 2 is a cross-sectional view taken along the line ■ to ■ in FIG. 1, and FIG. It is a figure equivalent figure. 1...Blower duct 2...Baffle plate 3...
Receiving plate (channel)

Claims (1)

[Scope of Claims] In a railway vehicle ventilation duct that is installed between an air intake port and the electrical equipment in order to air-cool the electrical equipment, a fitting-type baffle plate is provided in the middle of the air duct. Characteristic ventilation duct for railway vehicles.