JPH1035489A - Ventilator for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent large variation of pressure outside a vehicle from propagation to the inside of the vehicle by detecting the pressure variation only in the large pressure variation outside the vehicle to vary individually ands rapidly the ventilation flue area of a suction or exhaust air duct according to the detecting value. SOLUTION: A detecting means 14 measures always pressure variation outside a vehicle to input the information to a controller 13. The controller 13 judges the presence of the ecessity for the action of a ventilating air flow changing mechanism 2 or 11 on the basis of the data of inputted pressure variation outside the vehicle. When the controller 13 judges the necessity to be present, an air flow adusting blade provided in the ventilating air flow changing mechanism 2 or 11 is operated to change a ventilating flue area. For example, when the pressure outside the vehicle is abruptly lowered, the ventilating flue area is changed to reduce exhaust amount from the inside to the outside of the vehicle, so that the balance between suction and exhaust is maintained to retrain the pressure variation inside the vehicle.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a vehicle ventilation system,
Particularly, the present invention relates to a vehicle ventilation device suitable for a vehicle running at high speed.

[0002]

2. Description of the Related Art Generally, vehicles are ventilated by an air supply device for taking fresh air outside the vehicle into the vehicle and an exhaust device for discharging contaminated air inside the vehicle to the outside of the vehicle. When a vehicle travels through a tunnel, the pressure outside the vehicle fluctuates greatly, and its magnitude fluctuates largely in proportion to the square of the train speed, provided that the cross-sectional area of the train and the tunnel are the same. Within a train, it fluctuates most when trains pass each other. Accordingly, the following problems related to the above-described pressure fluctuations occur in the development of a high-speed Shinkansen vehicle in recent years.

[0003] That is, with respect to fluctuations in the pressure outside the vehicle exceeding the maximum pressure of the blower used in the ventilation system, for example, the forced backflow of air through the ventilation airway for ventilation or through the supply airway. A large amount of air is sucked in,
A sudden change in pressure occurs in the vehicle, which causes passengers to feel uncomfortable with the ear due to fluctuations in air pressure (hereinafter, referred to as earplugs). Therefore, in order to prevent passengers from catching ears, use a blower having a pressure characteristic equal to or greater than the maximum external pressure fluctuation acting during traveling, or use a ventilation air volume change mechanism that suppresses the propagation of the external pressure fluctuation into the vehicle. It must be installed in the grid. However, the former method leads to an increase in the size and weight of the ventilation device, which may make it impossible to mount the device on a vehicle. Therefore, measures are generally taken by the latter method.

[0004] Conventionally, as a ventilating device with a ventilation air volume changing mechanism used for a railway vehicle running at a high speed, for example, a ventilation passage corresponding to a pressure difference between the inside and outside of the vehicle as described in Japanese Patent Application Laid-Open No. 05-254428 is disclosed. In some cases, a flexible plate for changing the area is provided, and holding means for holding the flexible plate at a maximum deformation position of the flexible plate and attenuating vibration of the flexible plate is provided in a ventilation path.

[0005] Further, as described in Japanese Patent Application Laid-Open No. 07-172308, a variable flow resistance device capable of detecting the pressure in the vehicle and sliding the air volume adjusting plate to change the area of the air passage is provided in the air passage. There are things.

[0006]

SUMMARY OF THE INVENTION The above-mentioned Japanese Patent Application Laid-Open No. 05-25 / 2005
The prior art described in Japanese Patent No. 4428 has a structure in which an elastic body or a flexible plate that is cantilevered is deformed so as to change a ventilation passage area in accordance with a pressure difference between the inside and outside of the vehicle. However, since the operation can be performed even if a pressure difference between the inside and outside of the vehicle is generated, the operation frequency increases, and the cantilever support portion is fatigued or permanently deformed, and there is a problem in reliability.

Further, even if a slight pressure difference between the inside and outside of the vehicle is generated, the elastic body or the flexible plate is deformed, so that the ventilation passage area is frequently reduced, the ventilation is reduced, and the concentration of carbon dioxide in the vehicle is reduced. There was a problem of rising.

Further, since the elastic body or the flexible plate is uniformly deformed by the pressure difference between the inside and outside of the vehicle without distinction between air supply and exhaust, the air passage area can be changed individually for air supply and exhaust. However, when a large external pressure fluctuation occurs during driving, the propagation of the pressure fluctuation into the vehicle can be suppressed to some extent, but it cannot be suppressed to a level that prevents the ears of passengers. was there.

In the prior art described in Japanese Patent Application Laid-Open No. 07-172308, the air volume adjusting plate is slid by an air cylinder to change the ventilation passage area.
The stroke of the air cylinder was long, and there was a limit to the improvement in operating speed. In addition, since an air cylinder is used to change the ventilation passage area, information on the detected pressure fluctuation is taken into a control device, and the control device operates the air cylinder via an electromagnetic valve. There is a problem that the path from the operation to the operation is long and there is a concern that the response is delayed.

A first object of the present invention is to detect a pressure fluctuation only when the pressure fluctuation outside the vehicle is particularly large, for example, when the vehicle is running and passing an oncoming train in a tunnel, and supply power in accordance with the value. By individually and quickly changing the ventilation path area of the air or exhaust air path, it is possible to prevent large pressure fluctuations outside the vehicle from propagating into the vehicle, and to suppress the rise in the concentration of carbon dioxide in the vehicle. It is an object of the present invention to provide a vehicle ventilation device having a ventilation air volume changing mechanism capable of providing an indoor space, and a control method thereof.

However, with only the above function, the pressure value serving as the reference for control is fixed at a constant value. For example, during driving, when the climate changes and the atmospheric pressure changes, or when the altitude of the running section increases. If the atmospheric pressure changes due to changes,
Despite the fact that the pressure outside the vehicle is not suddenly changed, it is determined that the pressure outside the vehicle has fluctuated, and the air supply / exhaust air volume is unbalanced to change the air supply / exhaust ventilation path area. As a result, Although pressure fluctuations outside the vehicle are not abrupt, the pressure inside the vehicle may change abruptly, which may cause passengers to have ears.

A second object of the present invention is to prevent the operation of the ventilation air volume change mechanism due to a change in pressure outside the vehicle due to a climate change or an altitude change in a traveling section as described above. It is an object of the present invention to provide a vehicle ventilating device having a ventilation air volume changing mechanism capable of changing a ventilation passage area only when the occurrence of the air flow, and a control method thereof.

A third object of the present invention is to provide a ventilating apparatus for a vehicle having a ventilation air flow rate changing mechanism with a high response which can improve the operation speed as described above and can quickly respond to pressure fluctuations requiring control. It is to provide a control method.

[0014]

In order to achieve the above object, a first aspect of the present invention is to arrange a large number of air volume adjusting blades on a circumference, wherein the air volume adjusting blade is provided in an air passage for air supply and exhaust of a ventilator. A driving device that changes the ventilation path area of the air path, a detection unit that is disposed outside the vehicle and detects the degree of pressure fluctuation during traveling, and a control device that is connected to the driving device. It is a vehicle ventilation device provided.

According to a second aspect of the present invention, in the second aspect, the detection means accumulates the detected pressure fluctuation data outside the vehicle for a predetermined time in the control device, and calculates an average value thereof. The vehicle ventilation device includes a control device that operates the driving unit when the difference between the reference value and the detected outside pressure is read and the difference reaches a set threshold value. Things.

In order to achieve the third object, a third aspect of the present invention is to detect a pressure fluctuation outside the vehicle at every minute time, first calculate an average value of several times, and further calculate the average value. By dividing the data into several steps so that the average value is calculated and used as the reference value for operation after accumulating several times, the data for calculating the reference value for operation while strictly measuring pressure fluctuations is reduced. And a control device having a function of improving the calculation speed.

According to the first aspect of the invention, since a large pressure fluctuation outside the vehicle is detected to change the area of the air supply or exhaust air passage of the ventilation device, the pressure fluctuation is transmitted before the pressure fluctuation propagates into the vehicle. The ventilation path area can be changed, and as a result, the pressure fluctuation in the vehicle can be suppressed, and the ears of the passenger can be prevented. In addition, the driving means for changing the ventilation passage area is directly controlled by the stroke of the driving means for changing the same amount and the control device in order to improve the operating speed. ,
Response delay can be prevented. Further, when the pressure fluctuation outside the vehicle is small, the ventilation path area is not changed, so that the number of times of reducing the ventilation path area is reduced, and as a result, the ventilation is secured and the increase of the carbon dioxide concentration in the vehicle is suppressed. I can do it.

According to the second aspect of the present invention, the pressure fluctuation data outside the vehicle detected during running is accumulated in the control device for a certain period of time in the past, and an average value thereof is calculated and used as a reference value for operation. Even if the atmospheric pressure changes due to weather changes or altitude changes, the rate of change is slow and the reference value follows the change in atmospheric pressure. It can be prevented from changing. As a result, the air passage area is changed only when the pressure fluctuation outside the vehicle greatly deviates from the reference value, so that the vehicle interior pressure is not changed to a gradual change such as a change in the atmospheric pressure. Following, it is possible to suppress rapid pressure fluctuation.

According to the third aspect, the pressure fluctuation outside the vehicle is detected at small time intervals, so that the pressure fluctuation outside the vehicle can be detected quickly. Further, the reference value of the operation for operating the ventilation path area is not integrated as it is, but is collected in several steps, and thus the number of data for calculating the reference value is reduced. Since the calculation speed is improved, the operation of changing the ventilation path area can quickly respond to the pressure fluctuation outside the vehicle.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to FIGS. In FIG. 1, reference numeral 1 denotes a fresh outside air intake. Reference numeral 3 denotes an air supply blower, and a ventilation air volume change mechanism 2 is installed on an air passage closer to the outside air than 3. 4
The fresh air from the air supply blower 3 is supplied to the air conditioner 5.
It is a vehicle wind path for supplying to the vehicle. Reference numeral 6 denotes a discharge port for supplying conditioned air from the air conditioner 5 to the vehicle interior 7. Reference numeral 8 denotes a discharge port for discharging contaminated air in the vehicle to the outside of the vehicle. Reference numeral 9 denotes a vehicle wind path for sending contaminated air from the outlet 8 to the exhaust blower 10. Reference numeral 12 denotes a discharge port for discharging contaminated air out of the vehicle.
A ventilation air volume changing mechanism 11 is installed on an air path closer to the outside air than 0. The operations of the ventilation air volume changing mechanisms 2 and 11 are performed by the control device 13. In addition, a detecting means 14 for detecting a pressure fluctuation outside the vehicle is provided in order to give the material for judging the operation to the above 13.

FIG. 2 shows an example of the operation mechanism of the ventilation air volume changing mechanisms 2 and 11. The detecting means 14 constantly measures the pressure fluctuation outside the vehicle, and inputs the information to the control device 13. The control device 13 determines the necessity of the operation of the ventilation air volume changing mechanism 2 or 11 based on the input external pressure fluctuation data, and is installed inside the ventilation air volume changing mechanism when it is determined to be necessary. The air volume adjusting blades 15 are operated to change the ventilation path area to change the air volume of the air supply or exhaust.
The operation of the air volume adjusting blade 15 is performed by a driving device 16 attached to the air volume adjusting blade 15, and the operation of the 16 is performed by an electric motor 17 connected to a starting device 13. By installing the air volume adjusting blades 15 in this manner, it is possible to shorten the stroke of the driving device 16 for changing the same amount, improve the operation speed, and prevent a response delay from information detection to operation. I can do it.

The mechanism of the driving device 16 is shown below FIG. When the aperture lever 16a is moved by the electric motor 17, the aperture cam 16b rotates and the bell crank 16c rotates at the same time. When the 16c rotates, the wire 16d also rotates, and the air volume adjusting blade 1 connected to the 16d is rotated.
5 can also be rotated to change the ventilation path area. The configuration of the child is the same as that of the shutter mechanism of the camera.

FIG. 3 is a diagram showing an example of the pressure fluctuation outside the vehicle occurring during traveling and the pressure fluctuation inside the vehicle when the ventilation air volume changing mechanism is operated in response to the fluctuation. In FIG. 3, when the external pressure suddenly decreases as indicated by A, the external pressure becomes lower than the internal pressure, so that the amount of air supply from the outside to the inside of the vehicle decreases, and conversely, the amount of exhaust from the inside of the vehicle to the outside increases. become. As a result, the balance between air supply and exhaust is disrupted, and the pressure inside the vehicle also fluctuates. Also, in FIG. 3, when the external pressure rises sharply as shown by B, the opposite phenomenon occurs.
Therefore, for example, when a phenomenon as shown in FIG.
By changing the ventilation passage area of the exhaust ventilation air volume changing mechanism in order to reduce the increasing exhaust air volume, it is possible to suppress the in-vehicle pressure fluctuation as shown in FIG. I can do it. In addition, when a phenomenon as shown in FIG. 3B occurs, by performing an operation reverse to the above, it is possible to suppress the in-vehicle pressure fluctuation as shown in FIG. 3D.

FIG. 4 is a diagram showing an altitude map of a route when the altitude changes during traveling, and a diagram showing an example of a state of pressure fluctuation in the vehicle when traveling in this section. As the altitude of the route increases as shown in FIG. 4E, the outside pressure decreases as shown in FIG. 4F as the atmospheric pressure decreases. As a result, the control device 13 determines that a situation similar to that shown in FIG. 3A has occurred, and performs an operation of reducing the amount of ventilation air on the exhaust side. However, unlike FIG. 3A, in the case of FIG. 4, the change is gradual due to the pressure change outside the vehicle due to the change in altitude, and the pressure inside the vehicle follows the change. There is no pressure difference outside the vehicle, and supply and exhaust balance is maintained. Accordingly, by performing the operation of reducing the ventilation air volume on the exhaust side as described above, the balance between the air supply and the exhaust is disturbed, and the pressure in the vehicle fluctuates.
The phenomenon shown in FIG. Also,
If the altitude of the route decreases during traveling, the opposite phenomenon will occur. Furthermore, the same phenomenon occurs when the weather changes and the atmospheric pressure changes during traveling.

FIG. 5 is a diagram showing an example of the state of pressure fluctuation inside and outside the vehicle when the average value of the pressure fluctuation outside the vehicle within a certain period in the past is taken as the reference value for the operation of the ventilation air volume changing mechanism. In order to solve the problem as shown in FIG. 4, the reference value of the operation of the ventilation air volume changing mechanism is to take the average value of the pressure fluctuation outside the vehicle for the past fixed time as shown in FIG. Looking at the difference between J and the pressure outside the vehicle, when the difference is opened as shown in FIG. 5K, the ventilation air volume changing mechanism is operated as shown in FIG.
As a result, since the above-mentioned J follows a gradual change in the external pressure due to a change in the altitude of the route or a change in the mechanism, the difference between the J and the external pressure does not open. The problem as shown in FIG. 4 can be solved without being performed.

FIG. 6 is a diagram showing an example of the calculation of the average value. If the average value is calculated without any change in the outside pressure fluctuation data 18 measured by the detection means 14 in FIG. 1, the amount of data becomes enormous and the calculation takes too much time. Therefore, according to the present embodiment, 18 data are accumulated several times and the average value 19 is calculated. Next,
The data of No. 9 are accumulated several times, and the average value 20 is calculated. Further, the data of the 20 are integrated several times, and the reference value 21 is obtained.
Is calculated. By adopting such a method, the pressure fluctuation can be measured at every minute time, while the calculation data of the reference value is reduced, the calculation speed is improved, and the control device 13 can perform a quick judgment operation. .

[0027]

According to the present invention, it is possible to suppress the propagation of sudden pressure fluctuations outside the vehicle that occur during high-speed running of the vehicle into the vehicle while following the fluctuations in the atmospheric pressure due to changes in the weather and altitude. In addition, the operation speed for suppressing is improved.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a vehicle body showing a system configuration to which a vehicle ventilation device and a control method thereof according to the present invention are applied.

FIG. 2 is a perspective view of the ventilation air volume changing mechanism of FIG. 1;

FIG. 3 is a diagram showing a pressure fluctuation outside the vehicle occurring during traveling and a pressure fluctuation state inside the vehicle when a ventilation air volume changing mechanism is operated in response thereto.

FIG. 4 is a diagram showing a route elevation diagram when the altitude changes during traveling and a diagram showing the pressure fluctuation state outside and inside the vehicle when traveling in this section.

[FIG. 5] The values of pressure fluctuations outside the vehicle for a certain period of time in the past are accumulated,
It is a figure which shows the vehicle outside and vehicle interior pressure fluctuation | variation situation when the average value is made into the reference value of operation | movement of a ventilation air volume change mechanism.

FIG. 6 is a diagram showing a means for improving the calculation speed of the average value.

[Explanation of symbols]

1 ... fresh air intake, 2 ... ventilation air volume change mechanism for air supply,
3 ... air supply blower, 4 ... body airway, 5 ... air conditioner,
6 ... Discharge port, 7 ... In car, 8 ... Exhaust port, 9 ... Body wind path, 1
0: exhaust air blower, 11: exhaust ventilation air volume change mechanism, 1
2 ... contaminated air discharge port, 13 ... control device, 14 ... detection means, 15 ... air volume adjusting blade, 16 ... drive device, 16a ... throttle lever, 16b ... throttle cam, 16c ... bell crank,
16d: wire, 17: electric motor, 18: pressure fluctuation data outside the vehicle, 19: average value, 20: average value, 21: reference value.

Claims (3)

[Claims] 1. A drive device in which a number of air volume adjusting blades are arranged on a circumference, and are provided in air supply and exhaust air passages of a ventilation device, respectively, and change a ventilation passage area of the air passages. A ventilating device for a vehicle, comprising: detecting means arranged outside the vehicle for detecting the degree of pressure fluctuation during traveling; and control devices each connected to the driving device. 2. The vehicle ventilating device according to claim 1, wherein the control device accumulates data of the pressure outside the vehicle detected during traveling in the control device for a fixed time in the past, and calculates an average value thereof. A ventilating device for a vehicle, wherein the value is used as a reference value for operation and the difference between the reference value and the pressure outside the vehicle is read to output the difference to the drive device. 3. The ventilating device for a vehicle according to claim 2, wherein the control device detects a pressure fluctuation outside the vehicle every unit time, calculates an average value of several times, and further calculates the average value. After accumulating several times, the average value is calculated and used as a reference value for operation.