JP2002019607A - Ventilator for rolling stock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a ventilator for a rolling stock capable of keeping the low noise level at the exhaust side and utilizing the cold of the exhaust. SOLUTION: An instrument cooling duct and an exhaust duct are connected to an exhaust blower via a shunt duct 11. The shunt duct 11 is provided with a butterfly valve 22 and the duct resistance corresponding to its fixed angle is set so that the air blast is adjusted to the defined amount. This butterfly valve 22 divides the airflow within an airflow channel into two flows and inversely sets the duct resistances of the shunted airflow 21a and airflow 21b. By adjusting the defined angle of the butterfly valve 22, airflow amounts of the airflow 21a and 21b can be differentiated. As a result, airflow amounts flowing into the outlet 23, 24 and an outlet 25 are optionally adjustable.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ventilation system for a railway vehicle, and more particularly to a ventilation system for a railway vehicle suitable for use with a blower for discharging air inside the vehicle to the outside of the vehicle.

[0002]

2. Description of the Related Art In a high-speed vehicle, particularly in a railway vehicle running at a speed at which the pressure inside the vehicle may fluctuate due to fluctuations in the pressure outside the vehicle when traveling in a tunnel, fresh air outside the vehicle may be discharged inside the vehicle. An air blower that takes in air into the vehicle, and an exhaust air blower that discharges air inside the vehicle to the outside of the vehicle, wherein the air supply blower and the exhaust air blower are configured with a blower having a higher top pressure than the pressure fluctuation outside the vehicle. It is known that the air volume is made equal to eliminate pressure fluctuations in the vehicle. Particularly, in recent years, among high-speed vehicles, vehicles having an operating speed of about 300 km / h have been developed. Examples of these vehicle ventilators include, for example, JP-A-7-17230.
No. 8 is known.

[0003] These railcar ventilation devices have a function of sending clean air outside the vehicle into the vehicle and simultaneously sending air inside the vehicle to the outside of the vehicle. Conventionally, a compact design has been required because the device is to be mounted on a vehicle, and therefore, the internal air flow path has been configured as a single flow path for each of the flow path to be sent into the vehicle and the flow path to be sent out of the vehicle.

[0004]

In the conventional ventilator, the amount of air discharged from each discharge port of the air supply fan and the exhaust air blower is determined from the required ventilation amount of the occupant. Since the size of the discharge port is also limited by the overall size of the apparatus, the discharge port cannot be made to have a sufficient size, and the discharge is performed without reducing the flow rate of the discharge portion.

[0005] Air discharged outside the vehicle is cooled by an air conditioner inside the vehicle. Discharging the exhaust air as it is to the outside of the vehicle is inefficient because the use of the cold heat of the exhaust air is not sufficiently considered.

Further, when a ventilation device is constructed by combining the air supply blower and the exhaust blower, the amount of air blown depends on the structure or arrangement of each duct itself connected to each blower, and furthermore, the variation in characteristics of each blower itself. Unbalance occurs. In the initial adjustment of the ventilator, the imbalance was adjusted by providing a flow path resistance adjuster in each air passage so as to balance the air flow on the air supply side and the air flow on the exhaust side.

An object of the present invention is to provide a ventilation device for a railway vehicle that can effectively utilize the cool heat of the exhaust ventilation and reduce the noise of the exhaust ventilation.

[0008]

SUMMARY OF THE INVENTION The object of the present invention is to provide a railcar ventilation system comprising: an air supply means for supplying air outside the vehicle to the inside of the vehicle; and an exhaust means for discharging air inside the vehicle to the outside of the vehicle.
In the discharge-side air flow path of the exhaust blower that constitutes the exhaust means, via a flow divider, an exhaust duct that guides exhaust from the exhaust blower to the outside of the vehicle and a cooling duct that guides exhaust from the exhaust blower to a device to be cooled. Connected, the shunt is
An inflow air flow path connected to the exhaust blower, an exhaust flow path connected to the exhaust duct, and a cooling flow path connected to the cooling duct are provided. A flow path resistance adjuster that divides the inflow air flow path into an exhaust air flow and a cooling air flow and makes a difference in the resistance of each of the divided air flows is installed. The cooling-side airflow is formed by the flow path, and is achieved by being formed by the cooling-side flow path.

That is, a flow divider is provided in the discharge flow path of the exhaust blower to divide the exhaust blow path, and the number of discharge ports is reduced to reduce the flow velocity at the discharge ports to reduce noise. By providing a rotary butterfly valve serving as a flow path resistance adjuster at an appropriate position as a flow dividing mechanism, and having a structure in which the butterfly valve itself is configured to suppress the generation of a vortex that causes noise generated in an air flow, noise is reduced. Aim for reduction.

In addition, a duct is configured so that the exhaust gas can be used for cooling electric components installed on the vehicle, and the cool heat of the exhaust gas is effectively used.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to FIGS. FIG. 5 shows the configuration of a conventional ventilator, which will be described in detail in comparison with the embodiment of the present invention. Here, FIG. 1 and FIG. 2 are diagrams showing the equipment configuration and the flow path of the ventilator. FIG. 5 shows a conventional example, and FIG. 2 shows an example of a device configuration and a flow path of the ventilator of the present invention.

In FIG. 5, fresh air 1 outside the vehicle is sent into the vehicle interior 3 by an air supply fan 2. Exhaust gas 4 exhausted to the outside of the vehicle is exhausted by an exhaust fan 5 to a motor 6 for driving the air supply fan 2 and the exhaust fan 5.
Is cooled and discharged from the discharge port 7 to the outside of the vehicle. Normal,
The electric device 8 for controlling the motor 6 is housed in a storage box 9 separate from the ventilation device, and a dedicated cooling fan 10 for cooling the electric device 8 is installed in the storage box 9. Here, FIG.
In the case of the conventional ventilator shown in FIG. 1, since all the exhaust gas 4 discharged from the inside of the vehicle is discharged from the discharge port 7 to the outside of the vehicle, if the opening area of the discharge port 7 cannot be made sufficiently large, the flow rate of the exhaust gas at the discharge port 7 And the noise outside the vehicle may increase. In addition, since a dedicated cooling fan 10 is required to cool the electric device 8 that controls the motor 6, power consumption is increased and maintenance is complicated.

Therefore, in order to solve the above-mentioned problem, the ventilation device is configured as shown in FIGS. In FIG. 1, fresh air 1 outside a vehicle is sent into a vehicle interior 3 by an air supply fan 2. Exhaust gas emitted from the vehicle 4
Is blown by the exhaust fan 5 to the shunt duct 11 forming a shunt. The butterfly valve 12 built in the distribution duct 11 has a function of adjusting the resistance of an exhaust system duct that guides the exhaust gas 4 from the interior of the vehicle by an exhaust fan 5 serving as an exhaust blower due to a manufacturing error for each vehicle. That is, the butterfly valve 12 is rotatably installed,
When the installation angle is inclined with respect to the flow of the exhaust gas, the resistance to the flow of the exhaust gas 4 increases, and the resistance can be adjusted. Exhaust gas 4 exhausted from the inside of the vehicle
Alternatively, the exhaust gas discharged through the discharge port 14 to the outside of the vehicle and the cooling air 15 of the electric device 8 for controlling the motor 6, for example.
And shunted. The cooling air 15 enters the storage box 9 via the cooling air intake duct 16 of the electric device 8, cools the electric device 8, passes through the discharge port 17, and is discharged out of the vehicle.
By diverting the exhaust gas 4 discharged from the exhaust fan 5 by the distribution duct 11 in this manner, each discharge port 1
3. Dispersed and discharged from the discharge port 14 and the discharge port 17, the flow velocity of each can be reduced, and noise can be reduced. Further, the exhaust gas 4 is supplied to the cooling air 1 of the electric device 8.
By using it as 5, the cooling fan dedicated to the electric device 8 can be eliminated. Since the exhaust gas 4 may contain dust inside the vehicle, if the electric device 8 has an adverse effect on the adhesion of dust, a filter 18 is provided between the cooling air intake duct 15 and the storage box 9. It is also conceivable to install

FIG. 2 and FIG. 3 show an example of the structure of the branch duct 11. Discharged air 21 discharged from the exhaust fan 5
The flow resistance is set according to the fixed angle of the butterfly valve 22 installed in the inflow air flow path, and is adjusted to a predetermined air flow rate. The butterfly valve 22 divides the air flow in the inflow air flow passage into two, and sets the flow resistances of the divided air flow 21a and air flow 21b so as to have an inverse ratio. Therefore, by adjusting the fixed angle of the butterfly valve 22, the air flow 2
A difference can be made between the air flow rates of the air flow 1a and the air flow 21b. Thereby, the discharge ports 23 and 24 and the discharge ports 25
The flow rate of the air flowing to the air can be arbitrarily adjusted.

As an example, in order to diverge a large amount into the discharge port 23, the angle of the butterfly valve 22 is used by being inclined in the direction of the discharge port 23. Conversely, in order to diverge a large amount to the discharge port 25, the angle of the butterfly valve 22 is used by being inclined in the direction of the discharge port 25. As in the case of the branch duct 11 shown in FIG. 2, when the installation position of the butterfly valve 22 is located before the branch point 27 of the branch duct 11, that is, in the inflow air flow path on the upstream side of the air flow, only the adjustment of the air volume distribution is necessary. Instead, for example, by fixing the butterfly valve 22 vertically or parallel to the discharge air 21, the total air volume can be adjusted. Since the adjustment of the whole air volume becomes possible, it becomes possible to adjust the in-vehicle pressure when the ventilator is mounted on the vehicle. When a constant air volume is always secured at the discharge port 23 and the distribution of the air volume at the discharge port 24 or 25 is adjusted, a partition wall 28 is provided inside the distribution duct 11 to form a two-layer structure, so that it is not necessary to adjust the air volume. A structure is also conceivable in which a butterfly valve is not provided in a layer that requires adjustment, and a butterfly valve is provided only in a layer that requires adjustment.

FIG. 4 shows an example of the detailed structure of the butterfly valve. The butterfly valve 22 includes a rotary rod 26, a current plate 29, and a positioning hole 30. The angle at which the butterfly valve is adjusted is fixed by inserting fastening means such as bolts, screws, and pins into the positioning holes 30 from outside the distribution duct 11. Current plate 29
Has an area substantially equal to the cross-sectional area of the inflow air flow path in which the butterfly valve 22 is installed. However, in consideration of the function of adjusting the flow path resistance, the size of the air conditioning plate 29 is equal to the cross-sectional area of the inflow air flow path at the maximum, and is adjusted to adjust the resistance of each branch at a minimum. Configured to the required cross-sectional area. The shape of the current plate 29 may have various cross-sectional shapes perpendicular to the axial direction depending on the purpose.
For example, a crescent-shaped cross-sectional shape can be considered when the wind is preferentially flown in a certain direction. The illustrated cross-sectional shape is configured such that the middle portion in the width direction is thick and becomes thinner toward the front end of the edge. With such a configuration,
When disposed at an angle to the airflow, it is possible to prevent vortices from being generated on the downstream side of the edge of the butterfly valve 22, thereby suppressing noise.

According to such a configuration, since the exhaust gas is dispersed and flowed through the plurality of flow paths by the branch flow duct, the respective flow rates can be reduced, and the noise can be suppressed. By providing a butterfly valve in the inflow air flow path of the diverting duct, a difference in resistance due to a manufacturing error or a difference in arrangement or shape of each of the exhaust duct or the supply duct formed in the vehicle is adjusted by the butterfly valve. be able to. Thereby, the initial adjustment of the air flow rate on the exhaust side and the air supply side can be performed. The butterfly valve divides the exhaust gas in the inflow air flow path of the diverting duct, and adjusts the resistance of the diverted flow to adjust the distribution amount of the exhaust gas to the plurality of discharge ports.

[0018]

As described above, according to the present invention, it is possible to effectively use the cold heat of the exhaust ventilation and to reduce the noise of the exhaust ventilation.

[Brief description of the drawings]

FIG. 1 is an air flow path diagram showing an air flow path system of one embodiment of a railcar ventilation device according to the present invention.

FIG. 2 is a perspective view showing a detailed structure of a branch duct of FIG. 1;

FIG. 3 is a plan view showing a detailed structure of a branch duct of FIG. 1;

FIG. 4 is a perspective view showing a detailed structure of the butterfly valve of FIG. 1;

FIG. 5 is an air flow path diagram showing a conventional railcar ventilation device.

[Explanation of symbols]

1 ... fresh air outside the vehicle, 2 ... air supply fan, 3 ... inside the vehicle, 4 ... air inside the vehicle, 5 ... exhaust fan, 6 ... motor, 7 ... discharge port,
8 ... Electrical equipment, 9 ... Storage box, 10 ... Exclusive cooling fan, 1
DESCRIPTION OF SYMBOLS 1 ... Dividing duct, 12 ... Butterfly valve, 13, 14 ... Discharge port, 15 ... Cooling air, 16 ... Cooling air intake duct, 17 ...
Discharge port, 18: filter, 21: discharge air, 22: butterfly valve, 23, 24, 25: discharge port, 26: rotating rod,
27: diverting point, 29: rectifying plate, 30: positioning hole.

Claims (3)

[Claims] 1. A ventilator for a railway vehicle comprising an air supply means for supplying air outside the vehicle into the vehicle and an exhaust means for discharging the air inside the vehicle to the outside of the vehicle, wherein a discharge side air of an exhaust blower constituting the exhaust means. An exhaust duct that guides exhaust gas from the exhaust blower to the outside of the vehicle and a cooling duct that guides exhaust gas from the exhaust blower to a device to be cooled are connected to the flow path via a flow divider. An inflow air passage connected to the blower, an exhaust passage connected to the exhaust duct, and a cooling passage connected to the cooling duct; A flow path resistance adjuster that divides the air flow path into an exhaust-side air flow and a cooling-side air flow and makes a difference in resistance between the divided air flows is provided, and the exhaust-side air flow is provided in the exhaust-side flow path. Formed by the cooling side air The ventilation device for a railway vehicle, wherein the flow is formed from the cooling-side flow path. 2. The ventilator for a railway vehicle according to claim 1, wherein the flow path resistance adjuster includes a butterfly valve rotatably installed in the inflow air flow path across the air flow path. The ventilator for a railway vehicle, wherein the butterfly valve has an angle adjuster for adjusting an installation angle with respect to a flow direction of air. 3. The ventilation device for a railway vehicle according to claim 2, wherein the butterfly valve is smaller than a flow passage area of the inflow air flow passage, and has a difference in air pressure of an air flow passage partitioned by the butterfly valve. And a cross-sectional shape perpendicular to the rotation axis thereof is formed such that the middle part is thicker and thinner toward the tip part.