JPH0225036B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a control device for an air compressor mounted on a railway vehicle.

[Conventional technology]

In general, in railway vehicles, air is used to supply the pressurized air consumed by the air brake force while running, the parking brake force when stopping at a station, the opening/closing operation of vehicle doors, and the air springs that keep the vehicle height constant. A compressor is installed, and this air compressor is driven and controlled by a controller that detects the air pressure in the original air reservoir. This controller drives the air compressor when the air pressure drops to the lower limit of the set pressure value, and stops this drive when the upper limit is reached to maintain the air pressure within the set pressure value. As an example of such an air compressor control device, there has been one shown in FIG. 1 in the past. This includes a power line 1 that connects to a power source and a compressor drive line 2 that simultaneously drives air compressors installed in multiple vehicles. , 2, and a circuit for the (first) contact 3a of the (first) controller 3 (for example, a pressure regulator) is provided, and the compressor drive line 2 is provided with a circuit for the (first) contact 3a of the (first) controller 3 (for example, a pressure regulator) that opens and closes the communication between the air compressors. A contactor 5 is provided for opening and closing the circuit to the power supply. The controller 3
For example, when the air pressure in the source air reservoir (not shown) reaches the lower limit of the set pressure value (for example, 7 Kg/Km ² ), the contact 3a is closed, and when the air pressure reaches the upper limit (for example, 8 Kg/Km ² ), the contact 3a is closed. Open the circuit. When the air pressure in the source air reservoir reaches the lower limit value (7Kg/Km ² ), the contact 3a of the controller 3 closes, connecting the power line 1 and the compressor drive line 2, and connecting to the compressor drive line 2. A current flows through the solenoid 5a of the contactor 5, energizing it, and closing the contact 5b, thereby driving the electric motor 4 of the air compressor. After that, when the air pressure in the source air reservoir reaches the upper limit value (8Kg/Km ² ), the contact 3a of the controller 3 opens, demagnetizes the solenoid 5a of the contactor 5, opens the contact 5b, and the motor 4 stops. do.
Such operations are always performed whether the vehicle is running or stopped.

[Problem to be solved by the invention]

However, in the case of conventional air compressor control devices, when the air pressure in the source air reservoir drops to the lower limit of the set pressure value of the (first) controller, whether the vehicle is running or stopped at the station, Since the configuration is such that the air compressor is driven even when the station stops, the station stops due to air consumption due to the air brake force before the station stops, air consumption due to door opening/closing after the station stops, air consumption by air springs by passengers getting on and off, etc. At times, the air pressure in the source air reservoir drops to the lower limit value and the electric motor of the air compressor is driven frequently, which causes a problem in that noise is generated.

Therefore, the technical object of the present invention is to provide an air compressor control device that suppresses the driving of the air compressor as much as possible by lowering the setting value for driving the air compressor when the station is stopped.

[Means to solve the problem]

The technical means for solving the above technical problem is to provide a power line that connects to a power source and a compressor drive line that drives the air compressor, and connects the air compressor with the power line and the compressor drive line. A circuit is provided for the first contact of the first controller that controls the drive of the air compressor to within a set pressure value, and a circuit to the power source of the electric motor that operates the air compressor is closed when the compressor drive line is electrically connected to the power source line. In an air compressor control device provided with a contactor, a compressor suppression line for suppressing the drive of the air compressor is provided in parallel with the power supply line and the compressor drive line, and the circuit of the first contact is controlled from the set pressure value. a second contact of a second controller that detects a low air pressure value and controls the air compressor; and a third contact that is connected in series with the first contact and in parallel with the second contact.
and an interlocking contact that opens in conjunction with a vehicle door closing signal and closes in conjunction with a vehicle door open signal is provided between the power supply line and the compressor suppression line, and the compressor suppression line A relay is provided which demagnetizes the interlocking contact to close the third contact when the interlocking contact is opened, and energizes and opens the third contact when the interlocking contact closes.

[Effect]

According to the above, when the vehicle door is closed (while the vehicle is running), the interlocking contact opens, demagnetizes the relay, and closes the third contact, so that the air pressure is equal to the set pressure value of the first controller. When it comes to the lower limit value, this first
The controller operates to close the first contact connected in series with the third contact to establish continuity between the power supply line and the compressor drive line, thereby closing the circuit to the motor power supply using the contactor. to drive and control the air compressor.

When the vehicle door is opened (when the station is stopped), the interlocking contact closes, which excites the relay and opens the third contact, so that the air pressure reaches the lower limit of the pressure setting of the first controller and the first Even if the first contact of the first controller is closed, the lines are not electrically connected and the air compressor is not driven. When the air pressure drops to the set value of the second controller which is lower than the set pressure value of the first controller due to the air consumption when the station is stopped, the second controller is activated and connected in parallel with the third contact. The second contact is closed to establish conduction between the lines, and the contactor closes the circuit to the power source of the motor to drive and control the air compressor.

In this way, when the door is closed (while the train is running), the air compressor is controlled to be within the set pressure value of the first controller, and when the door is opened (when the station is stopped), the air compressor is operated. Since the drive is controlled by the second controller that detects the air pressure value lower than the set pressure value of the first controller, when the station is stopped, at least the lower limit value of the first controller and the set value of the second controller are controlled. Since the differential pressure can be secured, the probability that the air compressor will be driven is lowered, and the driving of the air compressor can be suppressed as much as possible.

〔Example〕

Hereinafter, the present invention will be explained based on embodiments shown in the drawings. In FIG. 2, a power supply line 10 connected to a power source, a compressor drive line 11 for simultaneously driving air compressors installed in a plurality of vehicles, and a compressor suppression line 12 for suppressing the driving of the compressors. A switch 13 for opening and closing communication between both lines 10 and 12 and an interlocking contact 14 for opening and closing in conjunction with the vehicle door opening/closing signal are provided in series between the power supply line 10 and the compressor suppression line 12. The interlocking contact 14 opens when the door of the vehicle is closed, and closes when the door is open. A relay 15 is connected to the compressor suppression line 12, and the relay 15 is energized when the interlocking contact 14 is closed and demagnetized when the contact 14 is opened. A first pressure regulator 1 is provided between the power supply line 10 and the compressor drive line 11 for opening and closing communication between both lines 10 and 11.
6 (first controller), a second contact 17 of a second pressure regulator 17 (second controller) is provided in parallel to this circuit, and a third contact that is interlocked with the relay 15. 18 are provided in series in association with only the first contact 16a of the first pressure regulator 16, and this third contact 18 is normally closed and the relay 15
When energized, it opens. the first transformer 16
The first contact 16a is closed when the lower limit of the set pressure value (for example, 7 Kg/Km ² ) is reached, and the first contact 16a is opened when the upper limit of the set pressure value is reached (for example, 8 Kg/Km ² ). The lower limit of the set pressure value of the second transformer 17 is set to, for example, an air pressure value necessary for safety when the station is stopped, and this limit value (for example, 6
Kg/Km ² ), the second contact 17a is closed, and when the upper limit value (for example, 7 Kg/Km ² ) is reached, the second contact 17a is opened. A contactor 20 is connected to the compressor drive line 11 for opening and closing a circuit to a power source of an electric motor 19 that operates the air compressor.

Next, the operation of the air compressor control device configured as described above will be explained.

When the vehicle is running, the door of the vehicle is closed, so the interlocking contact 14 is linked to the closing signal of the door.
is opened, the relay 15 is demagnetized, and the third contact 18 is closed. For example, the air pressure in the source air reservoir is the first
When the lower limit value (7 kg/Km ² ) of the set pressure value of the pressure regulator 16 is reached, the first contact 16a of the first pressure regulator 16 is closed. Then, the solenoid 20a of the contactor 20 is energized, its contact 20b is closed, and the electric motor 19 of the air compressor is driven. When the air pressure in the source air reservoir reaches the upper limit of the set pressure value of the first pressure regulator 16 (for example, 8 Kg/Km ² ) due to the operation of this air compressor, the first contact 16a of the first pressure regulator 16 opens, The solenoid 20a of the contactor 20 is demagnetized, its contact 20b is opened, and the electric motor 19 of the air compressor is stopped. At this time, the second pressure regulator 17 has a lower set value (6 to 7 Kg/Km ² ) than the first pressure regulator 16, so the second contact 17a is always open.

When the vehicle stops at a station, the doors of the vehicle are opened, so the interlocking contact 14 is linked to the door opening signal.
is closed, the relay 15 is energized, the third contact 18 is opened, and the circuit for driving the electric motor 19 of the air compressor by the first pressure regulator 16 is cut off. Therefore ^, the air compressor's electric motor 19
is not driven. In other words, when the air pressure in the source air reservoir reaches this lower limit value (6Kg/Km ² ), the second pressure regulator 17
The second contact 17a is closed, the solenoid 20a of the contactor 20 is energized, the contact 20b is closed, and the electric motor 19 of the air compressor is driven. When the air pressure in the source air reservoir reaches the upper limit of the set pressure value (7Kg/Km ² ) of the second pressure regulator 17 due to the operation of this air compressor, the second contact 17a of the second pressure regulator 17 opens and makes contact. The solenoid 20a of the device 20 is demagnetized and its contact 2
0b is opened and the electric motor 19 of the air compressor stops. In this way, the first and second pressure regulators 16 and 17 with different set pressure values are provided, and when the door of the vehicle is closed (while the vehicle is running), the first pressure regulator 16 with the higher set value controls the electric motor of the air compressor. The electric motor of the air compressor is controlled by the second pressure regulator 17 having a low setting value when the door of the vehicle is opened (while the vehicle is stopped). Note that the switch 13 is installed in the conductor's room, driver's cabin, etc., and when the above-mentioned function, that is, the drive control of the air compressor by the second pressure regulator 17 is not required, the switch 13 can be left in the open state. If possible, the function will be similar to that of the conventional device (Fig. 1).

FIG. 3 shows another embodiment of the present invention, which differs from the embodiment in FIG. 2 in that the second contact 21a of the second pressure regulator 21 is 1
in series with the circuit of contact 16a and the third of relay 15.
This is because the contact point 18 is connected in parallel. Regarding this effect, when the vehicle is running, the interlocking contact 14 is activated by the closing signal of the vehicle door, as described above.
is opened, the relay 15 is demagnetized, and the third contact 18 is closed. Therefore, for example, when the air pressure in the source air reservoir reaches the lower limit of the set pressure value of the first pressure regulator 16 (for example, 7 Kg/Km ² ), the first contact 16a of the first pressure regulator 16 is closed and the contactor 20 is closed. The solenoid 20a is energized, its contact 20b is closed, and the electric motor 19 of the air compressor is driven. When the air pressure in the source air reservoir reaches the upper limit of the set pressure value of the first pressure regulator 16 (for example, 8 Kg/Km ² ) due to the operation of this air compressor, the first contact 16a of the first pressure regulator 16 opens. Contactor 2
Solenoid 0 is demagnetized, its contact 20b is opened, and the electric motor 19 of the air compressor is stopped. At this time, since the second pressure regulator 21 has a lower set value than the first pressure regulator 16, the second contact 21a is always open.

When the vehicle stops at a station, the interlocking contact 14 is closed by the vehicle door opening signal, the relay 15 is energized, and the third contact 18 is opened. Therefore, the air pressure in the source air reservoir is the lower limit value of the first pressure regulator 16 (7Kg/Km ² ).
, the first contact 16a is closed, but the third contact 18 is open, so the electric motor 19 of the air compressor is closed.
is not driven, and the first contact 16a of the first pressure regulator 16 maintains a closed circuit state. When the air pressure further decreases to the lower limit value (for example, 6 kg/Km ² ) of the second pressure regulator 21, the second contact 21a is closed, the solenoid 20a of the contactor 20 is energized, and the contact 20b is closed. The electric motor 19 of the air compressor is driven. Due to the operation of this air compressor, the air pressure increases to the second pressure regulator 21.
When the upper limit value (for example, 7Kg/Km ² ) is reached, the contact 21a opens and the solenoid 20a of the contactor 20
is demagnetized, its contact 20b is opened, and the electric motor 19 of the air compressor is stopped.

FIG. 4 shows still another embodiment of the present invention, and is different from the above-described FIG. and a relay 23 and its contacts 24a, and a second
The configuration is such that a contact 24b of this relay 23 is provided as a contact. To be more specific, the contact 22a of the pressure switch 22 and the relay 23 are connected in series to the first contact 16a of the first pressure regulator 16, and the contact 24 of the relay 23 is connected in parallel to the contact 22a of the pressure switch 22.
a, and a contact 24b (second contact) of the relay 23 is provided in parallel to the third contact 18 of the relay 15. Regarding this effect, when the vehicle is running, the interlocking contact 14 is opened in response to the vehicle door closing signal, and the relay 15 is demagnetized and its contact 18 is closed, as described above. Therefore, for example, when the air pressure in the source air reservoir reaches the lower limit value of the first pressure regulator 16 (for example, 7 kg/Km ² ), the first contact 16a is closed and the electric motor 19 of the air compressor is activated by the action of the contactor 20.
is driven, and the operation of this air compressor causes the air pressure in the source air reservoir to rise to the upper limit of the first pressure regulator 16 (for example, 8
Kg/Km ² ), the first contact 16a opens and the electric motor 19 of the air compressor is activated by the action of the contactor 20.
stops. At this time, since the set value of the pressure switch 22 is lower than that of the first pressure regulator 16, the contact 22a of the pressure switch 22 and the contacts 24a and 24b (second contacts) of the relay 23 are in an open state.

When the vehicle stops at a station, the interlocking contact 14 is closed by the vehicle door opening signal, the relay 15 is energized, and the third contact 18 is opened. Therefore, the air pressure in the source air reservoir is the lower limit value of the first pressure regulator 16 (7Kg/Km ² ).
, the first contact 16a is closed, but the third contact 18 is open, so the electric motor 19 of the air compressor is closed.
is not driven, and the first contact 16a of the first pressure regulator 16 maintains a closed circuit state. When the air pressure further decreases to the set value of the pressure switch 22 (for example, 6 Kg/Km ² ), its contact 22a closes and energizes the relay 23, and its contacts 24a and 24b (second
contact) is closed. Therefore, since the first contact 16a and the contact 24b (second contact) of the first pressure regulator 16 are closed, the solenoid 20 of the contactor 20
a is excited, its contact 20b is closed, and the electric motor 19 of the air compressor is driven. When the air pressure in the source air reservoir exceeds the set value of the pressure switch 22 due to the operation of this air compressor, the contact 22a opens.
Since the contact 24a is closed, the relay 23 is self-supported, and the contact 24a and the contact 24b (second contact) maintain the closed state. Due to the operation of this air compressor, the air pressure in the source air reservoir is increased to the first pressure regulator 1.
When the upper limit of 6 (8Kg/Km ² ) is reached, the first contact 16
a is opened, the solenoid 20a of the contactor 20 is demagnetized, its contact 20b is opened, and the electric motor 19 of the air compressor is stopped. The relay 23 is also demagnetized and its contacts 24a and 24b (second contacts) are opened.

As described above (FIGS. 2 to 4), the present invention provides a system that opens and closes the lines 10 and 11 between the power supply line 10 and the compressor drive line 11 in response to the air pressure in the source air reservoir, for example. A third contact 18 that opens and closes between both lines 10 and 11 in conjunction with the first contact 16a of the first pressure regulator 16 and the vehicle door opening/closing signal is provided in series, and the first contact of these first pressure regulators 16 16a
A second contact 17a of the second pressure regulator 17 may be provided in parallel with the series circuit of the first pressure regulator 16 and the third contact 18 (FIG. 2), and a second A second contact 21a of the pressure regulator 21 may be provided (FIG. 3). Furthermore, a pressure switch 22 and a relay 23 (FIG. 4) may be provided in place of the pressure regulator; that is, any controller that detects air pressure and opens and closes the contacts may be used.

〔Effect of the invention〕

As is clear from the above, the present invention controls the air compressor to within the set pressure value of the first controller when the door is closed (while the vehicle is running), and when the door is opened (while the station is stopped). By controlling the air compressor with a second controller that detects an air pressure value lower than the set pressure value of the first controller, at least the lower limit value of the first controller and the second controller are set when the station is stopped. Since the drive of the air compressor can be suppressed as much as possible by securing the differential pressure with the set value of the air compressor, the generation of noise can be suppressed during that time.

[Brief explanation of drawings]

Fig. 1 is a circuit diagram showing a conventional air compressor control device, Fig. 2 is a circuit diagram of an air compressor control device showing an embodiment of the present invention, and Fig. 3 is a circuit diagram showing an air compressor control device showing another embodiment of the present invention. Circuit diagram of compressor control device FIG. 4 is a circuit diagram of an air compressor control device showing still another embodiment of the present invention. 10... Power line, 11... Compressor drive line, 12... Compressor suppression line, 14... Interlocking contact, 15... Relay, 16... First controller (first
pressure regulator), 16a...first contact, 17, 21...
Second controller (second pressure regulator) (22...pressure switch, 23...relay, 22a, 24a...contact)
...Second controller, 17a, 21a, 24b...Second contact, 18...Third contact, 19...Electric motor, 2
0... Contactor.

Claims (1)

[Claims] 1. A power supply line connected to a power supply and a compressor drive line for driving the air compressor are provided, and the air compressor is controlled to be driven within a set pressure value between the power supply line and the compressor drive line. The air compressor is provided with a circuit for a first contact of a first controller that operates the air compressor, and a contactor that closes a circuit to a power source of a motor that operates the air compressor when the compressor drive line is electrically connected to a power source line. In the control device, a compressor suppression line for suppressing driving of the air compressor is provided in parallel with the power supply line and the compressor drive line, and an air pressure value lower than the set pressure value is detected in the circuit of the first contact point. A second contact of a second controller for driving and controlling the air compressor, and a third contact connected in series with the first contact and in parallel with the second contact are provided, and the power supply line and the compressor suppression line are provided. An interlocking contact that opens in conjunction with a vehicle door closing signal and closes in conjunction with a vehicle door open signal is provided in between, and the compressor suppression line is demagnetized when the interlocking contact opens and closes the third contact. An air compressor control device comprising: a relay that is energized to open the third contact when the interlocking contact is closed.