JPS5819483B2 - Ventilation control device for vehicles - Google Patents

Description

[Detailed description of the invention] This invention relates to improvements in ventilation control devices for vehicles.

2. Description of the Related Art Conventionally, for example, ventilation inside a train with fixed windows has been controlled using a ventilation fan.

In other words, when the number of passengers increases, or when the vehicle is stopped in a tunnel due to a power outage, etc., the air inside the vehicle becomes polluted, so ventilation fans are rotated to keep fresh air inside the vehicle at all times.

FIG. 1 is a circuit diagram showing an example of this railway vehicle ventilation control device, in which a normally open contact 2a of a ventilation fan power supply no-fuse breaker 1 and a ventilation fan electromagnetic contactor 2 is connected between the power supply buses B1 and 82. Ventilation fan 3 is connected.

On the other hand, a DC control power source 4 such as a battery is connected to the DC control bus BD, and a control power no-fuse breaker 5 and a ventilation control switch 6 are connected between the control power source 4 and the control bus BD.

A coil 2c of a ventilation fan electromagnetic contactor 2 is connected between the control bus BD and the ground.

In addition, the input side of an inverter 7 is connected between the connection point between the ventilation control switch 6 and the control power no-fuse breaker 5 and the ground, and the output side of the inverter 7 is connected to the power supply bus B1.
, B2, respectively.

The output side of the inverter 7 is connected to the power supply buses B1 and B2 because operation of the ventilation fan 3 is especially necessary in an emergency such as during a power outage in the absence of AC power.

In such a configuration, in order to operate the ventilation fan 3, a crew member or the ventilation control switch 6 may be turned on while the no-fuse breaker 5 for control power supply and the no-fuse breaker 1 for ventilation fan power supply are turned on.

Then, the coil 2 of the electromagnetic contactor 2 is activated by the DC control power source 4.
c is energized, which closes the normally open contact 2a, so the ventilation fan 3 receives either the output of the inverter 7 or the power supply bus B1,
It is applied via B2, and the ventilation fan 3 rotates.

In order to stop the ventilation fan 3 in this state, the crew member only has to open the ventilation control switch 6.

Then, the coil 2c of the electromagnetic contactor 2 is deenergized and the normally open contact 2a is opened, so that the output from the inverter 7 is not applied to the ventilation fan 3, and the ventilation fan 3 is stopped.

In this way, in the conventional vehicle ventilation control device, the ventilation fan 3 cannot be controlled unless the ventilation control switch 6 is turned on or opened by the crew member, and the operation of turning on or opening the ventilation control switch 6 is done at the discretion of the crew member. Therefore, the judgment cannot always be said to be constant, and it often happens that the ventilation fan 3 is operated when it is not necessary to operate, or is not operated when it is necessary to operate.

This invention was made in view of the above circumstances, and provides a vehicle ventilation control system that automatically controls the ventilation fan according to the load corresponding to the occupancy rate in the vehicle, without the driver making a mistake in controlling the ventilation fan in the vehicle. The purpose is to provide equipment.

The present invention will be described below with reference to embodiments shown in the drawings.

FIG. 2 is a circuit diagram showing an embodiment of the present invention, in which a variable load device 10 and a current limiter, which are normally used to control the current during braking or driving, are connected between both ends of the DC control power source 4. The accelerating relay 11 is also connected in series.

In addition, the output of the variable load device 10 is inputted between both ends of the DC control power source 4 via a backflow blocking diode 13, and the number of passengers in each vehicle is detected, and when the number of passengers exceeds an arbitrarily set operating point, A variable load detector 12 that closes a normally open contact 12a connected in series to the coil 2c of the electromagnetic contactor 2.
is connected.

Since the other points are configured similarly to the conventional circuit shown in FIG. 1, the explanation thereof will be omitted here.

In the vehicle ventilation control system configured in this manner, the output of the load variable device 10 varies in detection voltage depending on the occupancy rate, for example, as shown in FIG.

When the detected voltage of the variable load device 10 exceeds the operating point for the number of passengers arbitrarily set by the variable load detector 12, an output is generated and the normally open contact 12a closes.

By closing the normally open contact 12a, the coil 2c of the electromagnetic contactor 2 is energized, and this normally open contact 2a is closed.

By closing the normally open contact 2a, since the no-fuse breaker 1 for the ventilation fan power supply has already been turned on, the output voltage of the inverter 7 is applied to the ventilation fan 3, so that the ventilation fan 3 rotates.

Also, when the number of passengers in the car becomes smaller than the set value, no output is generated from the variable load detector 12, so this normally open contact 12a
is opened, the coil 2C of the electromagnetic contactor 2 is deenergized, and the ventilation fan 3 is stopped.

In this way, the output of the variable load device 10 used for controlling the current value when braking or moving is linked to a variable load detector whose operating value can be arbitrarily set, and this output controls the ventilation fan 3. Since it is driven, there is no need for the crew to operate the ventilation control switch at their discretion as in the past, which prevents wasted power consumption due to forgetting to turn off the ventilation control switch, and maintains a constant environment inside the car at all times. I can do it.

FIG. 4 is a circuit diagram showing only the essential parts of another embodiment of the present invention. In the embodiment described above, the number of passengers is detected by combining a general variable load device and a variable load detector. , an air spring (not shown) is installed at the bottom of the car body that changes depending on changes in the load on the car body, and this air spring and the air pressure switch 1
This is linked to 4.

That is, when the pressure of the air spring exceeds a predetermined value, the air pressure switch 14 is closed, and the coil 2 of the electromagnetic contactor 2 is closed.
Since C is energized, the normally open contact 2a closes and the ventilation fan 3 rotates.

Also, when the air spring pressure is less than a predetermined value, the air pressure switch 1
4 opens and ventilation fan 3 stops.

Therefore, this embodiment also produces the same effects as described above.

Note that the embodiments of the present invention described above can be modified as follows.

In the embodiment described above, the ventilation fan 3 operates when the load on the vehicle body, which changes depending on the occupancy rate, exceeds a predetermined value.
For example, when the occupancy rate is 100%, one ventilation fan 3 is operated in one vehicle, and when the occupancy rate is 200%, two ventilation fans 3 of the same capacity are operated.

In addition, as the ventilation fan 3, one whose rotation speed can be changed is used,
The configuration may be such that the rotation speed of one ventilation fan 3 is changed depending on the occupancy rate.

By doing so, ventilation efficiency is increased.

According to the invention described above, the control of the ventilation fan in the car is not limited to the judgment of the crew, but the ventilation fan is automatically controlled according to the load corresponding to the occupancy rate, which prevents unnecessary power consumption and keeps the inside of the car constantly running. It is possible to provide a vehicle ventilation control device that can maintain a constant environment.

[Brief explanation of the drawing]

Fig. 1 is a circuit diagram showing an example of a conventional ventilation control device for a vehicle, Fig. 2 is a circuit diagram showing an embodiment of the ventilation control device for a vehicle according to the present invention, and Fig. 3 explains the operation of the same embodiment. FIG. 4 is a circuit diagram showing another embodiment of the vehicle ventilation control device according to the present invention. B1, B2...Power bus, BD...
Control bus bar, 1... No-fuse breaker for ventilation fan power supply, 2... Magnetic contactor, 3... Ventilation fan, 4... DC control power supply, 5. ...No fuse breaker for control power supply, 7...Inverter, 10...Load variable device, 11...
Current limiting acceleration relay, 12... Variable load detector, 13
..., backflow blocking diode, 14...atmospheric pressure switch.

Claims (1)

[Claims] 1. A control power source, a ventilation fan that is connected to the control power source via a switch to ventilate the vehicle, and a load signal corresponding to the occupancy rate of the vehicle, and only when this load signal is equal to or higher than a predetermined value, the A vehicle ventilation control device consisting of a control circuit that gives a closing command to a switch.