JPH03208766A - Ventilation device for vehicle - Google Patents

Abstract

PURPOSE:To facilitate equipment to a car body through compactness, by arranging both air feed side and exhaust side pressure moderation devices respectively at contact point portions between the car inside and outer air, and cutting off the change of car outside pressure effectively, and at the same time putting the air feed side pressure moderation device inside a silencer. CONSTITUTION:As for outer air, the change of car outside pressure is cut off by means of a pressure moderation device 9 built inside a silencer 8, and at the same time noise is reduced by means of the silencer 8. Afterwards, air feeding is done to an air conditioning device through an air feed device 2. Meanwhile, exhaust is introduced into a suction silencer 10 through a return duct inside a car, and supplied to an exhaust device 7. Also, exhaust is supplied to a drive motor 12 through a connecting duct 11, and cooled, and then, dis charge to the outside is made through an exhaust side pressure moderation device 13. Thus, the change of car outside pressure is efficiently cut off by means of both air feed side and exhaust side pressure moderation devices 9, 13, and at the same time compactness is attained by building the air feed side pressure moderation device 9 within the silencer 8.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to public ventilation for vehicles, and particularly to a ventilation system for vehicles suitable for vehicles traveling at high speed in tunnels.

[Conventional technology]

Conventionally, in vehicles that run in tunnels at high speeds, such as Shinkansen trains, the pressure outside the vehicle changes rapidly, especially when passing each other in the tunnel. A separate air and exhaust system was installed. Furthermore, a structure in which the air supply and exhaust devices are integrated is also proposed in Japanese Patent Application Laid-Open No. 1-74161. A specific example of this arrangement is as shown in Figure 2 of Utility Model No. 50-114805. In such a device, a steeply sloped ML feeding machine with a kite volume/pressure characteristic is used so that the pressure inside the vehicle does not change much even if the pressure outside the vehicle changes. (Japanese Patent Publication No. 58-9022) The maximum pressure (that is, the maximum pressure) in the pressure characteristics of these blowers is set so as to exceed the maximum value of the change in external pressure that occurs when the train runs in a tunnel. The reason for this is that when the maximum change in external pressure (in general, the change to negative pressure is large) momentarily exceeds the maximum pressure characteristic value of the blower, a backflow phenomenon occurs in the air supply side blower, and it passes through the air supply blower. The air inside the car will flow out of the car. When the air inside the car is discharged by the exhaust blower, the amount of air inside the car flowing out of the car increases rapidly, and the air outside the car cannot be taken into the car.
This is because the pressure inside the car will drop suddenly, causing discomfort to the ears of passengers. However, if you try to further increase the train speed, the change in pressure outside the car inside the tunnel increases, so a blower JK* with even larger pressure characteristics is required, but a blower with larger pressure characteristics needs to be Since it requires larger size and higher speed, it has the disadvantage that the entire device becomes larger, more expensive, and generates more noise. Another way to deal with this increase in train speed is to use pressure relief 'II! Japanese Patent Application Laid-Open No. 62-299475 proposes a method of using a leaf spring as a structure to cut off fluctuations in pressure outside the vehicle.

[Problem to be solved by the invention]

The above-mentioned conventional technology has been devised in various ways to cut off fluctuations in pressure outside the vehicle, but the arrangement when applied to a vehicle,
Noise countermeasures were not considered.

It is an object of the present invention to provide a vehicle for use in a vehicle that can cut off fluctuations in outside pressure, effectively arrange a ventilation system that integrates air supply and exhaust, suppress fluctuations in inside pressure within permissible limits, and reduce noise. The purpose is to provide ventilation equipment.

[Means to solve the problem]

The above purposes include a ventilation system that integrates an air supply system and an exhaust system, a silencer on the supply side, a pressure relief device on the supply side, a suction muffler, a duct connecting the exhaust system outlet and the drive motor of the ventilation system, and an exhaust system. This is achieved by incorporating the air supply side pressure relief device into the air supply side silencer in a vehicle ventilation system configured with a side pressure relief device.

[For production]

Air supplied to the ventilation system is supplied to the ventilation system through a muffler with a built-in pressure relief mechanism, so noise on the air supply side is reduced. Fresh outside air is supplied from the ventilation system to the inside of the car, and the exhaust air is placed in the order of a muffler, a ventilation system, and a pressure relief mechanism.If the exhaust cools the drive motor, it is possible to not only reduce noise but also to cool the motor. .

〔Example〕

Hereinafter, one practical example of the present invention will be explained with reference to FIGS. 1 and 2. FIG. 2 is a conceptual diagram showing the flow of air in a vehicle. The solid arrows in FIG. 2 indicate the flow of air supply, and the dashed arrows indicate the flow of exhaust air. Fresh outside air is taken in through the air intake ports l (shown at both ends of the can in FIG. 2, but the locations may be any location where fresh outside air can be taken in). This air intake is generally equipped with a draining device to prevent rainwater from being taken in. The air is taken into the air supply system installed under the floor through a duct installed in the car body. A muffler with a built-in pressure relief mechanism is attached to the inlet of the air supply system, which reduces noise on the air supply side and blocks pressure fluctuations from outside the vehicle. Here, fresh outside air is passed through the duct 3 installed on the floor of the vehicle to the air conditioner! 4. The conditioned air from the air conditioner 4 is discharged into the vehicle through an air conditioning duct 5 in the floor to air condition the interior of the vehicle.

The air that has been conditioned inside the car passes through the return duct 6 as circulating air and is sent to the air conditioning system! ! 4, a part of which is exhausted as exhaust gas through the suction muffler and the exhaust system I7. Next, the configuration of the integrated supply/exhaust type ventilation system will be explained using FIG.

Fresh outside air is taken in through an air intake port l and enters a muffler 8 which includes a pressure relief mechanism 9. Here, the internal pressure damping mechanism 9 cuts off fluctuations in the external pressure of the vehicle, and the noise is reduced by the muffler 8. After passing through this muffler 8, the supply air enters the air supply device 2 and is supplied to the air conditioner [4]. Exhaust air passes through the return duct inside the car and is sucked into the muffler.
Enter O and exhaust system 1! After passing through j7, it is guided to the drive motor n via the connecting duct 11, and the drive motor n is cooled. Thereafter, it is discharged to the outside via the exhaust side pressure relief device l3. In this way, the pressure relief device is disposed at the contact point between the inside of the vehicle and the outside air on both the air supply side and the exhaust side, so that it is possible to effectively block fluctuations in the pressure outside the vehicle.

By arranging the air supply side pressure relief device 9 inside the muffler 8 in this way, noise and pressure fluctuations are reduced, and
It can be packed compactly so that silver mounting on the car body is easy.

Further, the drive motor that drives the air supply system ai2 and the exhaust device 7 can be forcibly cooled by exhaust gas, and there is also the effect that the drive motor p can be made smaller.

Next, when comparing the air resistance on the air supply side, the air resistance on the air supply side is larger. This means that the air resistance on the air supply side is the air intake! It is the sum of the air resistance of the vehicle body duct (with water drainer included), the silencer 8 (built-in pressure relief device on the air supply side), and that on the exhaust side is the sum of the air resistance of the return duct 6, the suction silencer IO, the connecting duct U, and the exhaust side pressure. This is because the resistance at the air intake port 1 attached to the draining device on the air supply side is large.

Since the supply air volume and the exhaust volume are generally the same capacity, due to the difference in air resistance mentioned above, unless some form of air resistance equivalent to a draining device is added to the exhaust side, the Jj of the supply air and exhaust air will be reduced.
An imbalance of Lf occurs. For this reason, it is best to attach a throttle as a resistor to the outlet side of the exhaust side pressure relief device l3.
This is the easiest method, but if the air volume is restricted at this outlet, the discharge air speed will be extremely high, producing wind noise and increasing noise. In addition, the high wind speed poses strength problems to surrounding structures. For this reason, if a resistance approximately equivalent to the draining device is installed at any position from the suction muffler 10 to the exhaust side pressure relief device 13, the exhaust side pressure relief device l
The wind speed at the exit of No. 3 becomes low, and noise can be suppressed.

〔Effect of the invention〕

According to the present invention, it is possible to suppress the propagation of pressure fluctuations outside the vehicle into the interior of the vehicle, and it is possible to provide an equipment arrangement that can simultaneously satisfy noise countermeasures for the interior of the vehicle, cooling of the drive motor, and reduction of exhaust wind speed. .

[Brief explanation of drawings]

FIG. 1 is a plan view showing an embodiment of the vehicle ventilation system according to the present invention, and FIG. 2 is a side view of a vehicle body showing the flow of air inside a vehicle equipped with the ventilation system of FIG.

Claims (1)

[Claims] 1. A ventilation system that integrates an air supply device and an exhaust device connected to a fresh outside air intake, an air supply side silencer, an air supply side pressure relief device, a suction muffler, an exhaust system outlet, and A vehicle ventilation system comprising a duct connecting a drive motor of the ventilation system and an exhaust side pressure relief device, characterized in that an air supply side pressure transfer device is built into an air supply side silencer. . 2. The vehicle air conditioner according to claim 1, wherein means for adjusting air volume is built into the intake silencer. 3. The vehicle ventilation system according to claim 1, characterized in that means for adjusting air volume is built into the duct that connects the exhaust side pressure relief device inlet and the drive motor casing of the ventilation system. . 4. The vehicle ventilation system according to claim 1, wherein means for adjusting air volume is built into the inlet of the exhaust side pressure relief device. 5. The vehicle ventilation system according to claim 1, further comprising a means for adjusting the air volume at the outlet of the exhaust side pressure relief device.