JP2734848B2 - Vehicle ventilation system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle ventilation system, and more particularly to a vehicle ventilation system suitable for a vehicle running at high speed in a tunnel.

[0002]

2. Description of the Related Art In a high-speed vehicle such as a bullet train or a floating railway, a large pressure fluctuation occurs in a tunnel when the vehicle travels in the tunnel. The magnitude of this external pressure fluctuation is
The value is almost proportional to the square of the speed and increases when there is an oncoming train in the tunnel. In order to prevent discomfort (earspan) felt by passengers due to the propagation of the pressure fluctuation into the vehicle, a blower having a pressure characteristic equal to or higher than the external pressure fluctuation is used as a ventilation device, or the external pressure fluctuation is transmitted to the vehicle. It is necessary to provide a pressure relief mechanism in the ventilation system to suppress intrusion. Here, in order to cope with the recent increase in speed by the former method, it is necessary to increase the size of the ventilation device. Therefore, the latter method is generally used to suppress the in-vehicle pressure fluctuation.

Conventionally, as described in Japanese Patent Application Laid-Open No. 62-227850, a pressure relief ventilator for a high-speed vehicle has been provided on the suction side of a blower in accordance with the detection result. Method for controlling aperture means,
As described in Japanese Patent No. 2-227852, a method of detecting a passing period during traveling in a tunnel and reducing or blocking the supply / exhaust air volume of the train during the detection period, or
As described in JP-A-63-315365,
2. Description of the Related Art There is known a method of detecting a pressure fluctuation outside a vehicle and controlling a blowing capability of air supply and exhaust.

[0004]

In the above prior art, the throttle means, the shutoff means, or the air blowing capacity control means is controlled by using the detection result of the vehicle interior pressure or the vehicle exterior pressure. Therefore, depending on the problem of how to compensate for the delay in the response of the control system, or the pattern in which the pressure fluctuation is completely different depending on the timing of tunnel entry.
And there is a problem that it is not possible to cope with an excessive pressure fluctuation that may occur during a period other than the passing period.

[0005] It is an object of the present invention to provide a vehicle ventilating device which alleviates discomfort felt by passengers when the vehicle is traveling at high speed in a tunnel.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides an air supply device for taking outside air into a vehicle.
And an exhaust device for exhausting the air inside the vehicle to the outside,
A throttle valve installed in the flow path of the air supply device to adjust the air volume
And installed in the flow path of the exhaust device to adjust the air volume
In a vehicle ventilation system having a throttle valve,
Change of external pressure fluctuation received by own train during train operation
Pressure fluctuation estimating means for estimating and calculating the external pressure
A target value of the air volume of the air supply device based on the force fluctuation estimation result
And the in-vehicle pressure for calculating the target value of the air volume of the exhaust device
And a control device, wherein the in-vehicle pressure control device is
The throttle valve of the flow path having the lower airflow of the target value is not provided.
Control and set the throttle valve of the other flow path to the target value.
Control is performed so that

[0007]

In the above configuration, during traveling in a tunnel,
Estimate and calculate the temporal change of external pressure fluctuation received by the own train
External pressure fluctuation estimation calculating means;
The target value of the air volume of the air supply device and the
In-vehicle pressure control device that calculates the target value of the air volume of the exhaust device
And the pressure control device includes the two target values.
The throttle valve of the flow path having the lower air volume is not controlled, and other
The throttle valve of one of the flow paths is controlled so as to reach the target value.
Control when traveling in a tunnel.
Pleasant feeling can be eased, and throttle valve control is easy.
Can be done.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1, 2 and 3 show a first embodiment of the present invention. 1 and 2, reference numeral 1 denotes an air supply device installed in a vehicle, 2 denotes a fresh outside air intake, 3 denotes an air supply blower, and 4 denotes a supply air volume adjustment mounted on an air flow path of the air supply device 1. Throttle valve, 5 is an air conditioning duct, 6 is a discharge grill, 7 is a passenger compartment, 8 is a discharge grill for discharging contaminated air inside the vehicle to the outside, 9 is a discharge duct, 10 is an exhaust device, 11 is an exhaust blower, Reference numeral 12 denotes a throttle valve for adjusting the amount of exhaust air, which is mounted in the air passage of the exhaust device 10. 14 is own train speed detecting means, 15 is own train tunnel entry timing detecting means,
16 is an oncoming train speed detecting means, 17 is an oncoming train tunnel entry timing detecting means, 18 is tunnel shape data comprising a length, a cross-sectional area, a hydraulic diameter and a wall friction coefficient relating to a tunnel in a running section, in order. A tunnel shape data output device 19 for outputting a train shape data output comprising a length, a vehicle body cross-sectional area, a hydraulic diameter, a side frictional resistance coefficient, and a pressure resistance coefficient relating to the own train and the oncoming train. A shape data output device, 20 is an external pressure fluctuation estimating means by a digital computer, and 13 is an in-vehicle pressure control device comprising a digital computer. Here, the outside pressure fluctuation estimation calculating means 20 receives the signals from the own train speed detecting means 14, the own train tunnel entering timing detecting means 15, the oncoming train speed detecting means 16 and the oncoming train tunnel entering timing detecting means 17 when entering the tunnel. In response to the detection result and the data output from the tunnel shape data output device 18 and the train shape data output device 19, the time of the external pressure fluctuation received by the own train is calculated by a numerical calculation method using a characteristic curve method or the like. The target change P0 is estimated and calculated. However, when there is no oncoming train in the tunnel, there is no need to use the oncoming train speed detecting means 16 and the oncoming train tunnel entry timing detecting means 17.

Next, the calculation result P0 of the pressure data outside the vehicle by the calculation means 20 is transmitted to the pressure control device 13 inside the vehicle.
Using the result, the throttle valve 4 or the exhaust air volume adjusting device, which is an air supply air volume adjusting device, so that the internal pressure related to the ear lobe and the internal pressure changing speed do not exceed an allowable value by an operation signal from the internal pressure control device 13. Is controlled.

FIG. 3 shows an embodiment of a control method in the in-vehicle pressure control device 13. The in-vehicle pressure control device 13 calculates the difference between the out-of-vehicle pressure estimated value P0 and the in-vehicle pressure control target value P2 transmitted from the out-of-vehicle pressure fluctuation estimation calculating means 20, the pressure / flow characteristics of the air supply blower 3 and the exhaust blower 11, and From the amount of leakage of the vehicle body, a supply air volume target value Q1 and an exhaust air volume target value Q2 for satisfying the vehicle interior pressure control target value P2 are calculated.
Of the supply air and the exhaust air, the throttle valve with the lower air volume may be uncontrolled, and the throttle valve with the higher air volume may be adjusted. One aperture
Since the control is performed only with the valve, the configuration can be simplified. The in-vehicle pressure control device 13 considers the delay of the throttle valves 4 and 12,
An operation signal is output so that the supply air flow target value Q1 and the exhaust air flow target value Q2 are obtained. Here, the in-vehicle pressure control target value P
2 can be set arbitrarily as long as the in-vehicle pressure and the in-vehicle pressure change rate related to the ear lobe do not exceed the permissible value. In FIG. 3, the in-air pressure target value Q1 when the in-vehicle pressure control target value P2 is always 0 is set. And an exhaust air flow target value Q2. In addition, it is also possible to provide a vehicle interior pressure detection device and monitor the control state. By such control, it is possible to suppress the imbalance between the supply air volume and the exhaust air volume, and to prevent the passengers from feeling uncomfortable (earspan) due to the intrusion of the external pressure fluctuation into the vehicle.

Here, the calculation of the time variation of the external pressure fluctuation by the external pressure fluctuation estimating means 20 is performed in real time for a plurality of cars in the train set, and the in-vehicle pressure control device 13 is provided for each car. It may be performed by using. In addition, own train speed detecting means 14, own train tunnel entry timing detecting means 15, oncoming train speed detecting means 16, oncoming train tunnel entering timing detecting means 17,
Any one of the tunnel shape data output device 18, the train shape data output device 19, and the outside pressure fluctuation estimating means 20 may be based on transmission data from the ground.

According to the embodiment, since the pressure fluctuation outside the vehicle is predicted and controlled, it is possible to perform the control in which the delay of the control system is compensated.

[0013]

As described above, according to the present invention, it is possible to prevent the discomfort (ear pinching) felt by the passenger due to the intrusion of the external pressure into the vehicle in the tunnel, and the throttle valve.
Can be easily controlled.

[Brief description of the drawings]

FIG. 1 is a block diagram showing control contents of a first embodiment of a vehicle ventilation device according to the present invention.

FIG. 2 is a cross-sectional view of a vehicle ventilating device according to a first embodiment of the present invention, schematically illustrating the device.

FIG. 3 is an explanatory diagram of a control target of the first embodiment according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Air supply device, 4 ... Throttle valve, 10 ... Exhaust device, 12 ... Throttle valve, 13 ... Car interior pressure control means, 14 ... Own train speed detection means, 15 ... Own train tunnel entry timing detection means,
16: Oncoming train speed detecting means, 17: Oncoming train tunnel entry timing detecting means, 18: Tunnel shape data output device, 19: Train shape data output device, 20: Outside vehicle pressure fluctuation estimation calculating means .

 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Masakazu Matsumoto Inventor 794, Higashi-Toyoi, Katsumatsu-shi, Yamaguchi Pref. Kasado Plant, Hitachi, Ltd. Hei 3-266762 (JP, A) JP-A-62-227852 (JP, A)

Claims (1)

(57) [Claims] 1. A and air supply apparatus incorporating outside air into the vehicle, the exhaust device for exhausting the interior of the air to the outside of the vehicle, before
A throttle valve installed in the flow path of the air supply device to adjust the air volume
And installed in the flow path of the exhaust device to adjust the air volume
A ventilator for a vehicle having a throttle valve , an external pressure fluctuation estimation calculating means for estimating and calculating a temporal change of the external pressure fluctuation received by the own train during tunnel running, and the air supply based on the external pressure fluctuation estimation result. Target value of air flow of device
And an in- vehicle pressure control device that calculates a target value of the air volume of the exhaust device .
The throttle valve of the flow path having the lower airflow of the target value is not provided.
Control and set the throttle valve of the other flow path to the target value.
It is to control so that, vehicle ventilating device according to claim.