JPS6114030B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a control device for a vehicle electric blower during commercial operation.

When cooling heat-generating electrical components installed in a vehicle,
Generally, an electric blower is used for cooling. An example of this will be explained with reference to FIG. Electrical components 2 that require cooling are mounted inside the vehicle body 1. In order to cool the electrical equipment 2, an air flow path is formed between the cooler 3 and the electrical equipment 2, and the air passage 4 is formed between the cooler 3 and the ceiling B of the vehicle body 1.
An electric blower BM installed in the same air duct 4 circulates outside air as shown by the arrow. In addition, 5 is a wire mesh provided at the entrance of the wind path 4, and 6 is a wheel.

By the way, the control circuit of the electric blower BM is the second one.
It is configured as shown in the figure. First, the main controller has a main drum MD and an auxiliary drum AD in the power supply E.
MC is connected. The auxiliary drum AD has a circuit configuration that is cut off when the handle (not shown) comes to the open circuit position a, and is closed when the handle comes to the closed circuit position b, and is connected to the power source E, and has a circuit for controlling the blower. Shade disconnector CN and blower control coil BMK―
C is connected in series. Meanwhile, the main drum MD
When the handle (not shown) comes to the open circuit position C, the circuit is cut off, and when the handle (not shown) comes to the motor control positions A to N, the circuit is closed to control the operation of the vehicle drive motor. The contact BMK-a, which is closed by the blower control coil BMK-C, is connected in series with a main circuit current breaker L that protects the circuit of the vehicle drive motor.

Further, the electric blower BM includes a three-phase power supply U,
A contactor BMK, which is connected to V and W and is closed by excitation of the coil BMK-C, and an electric blower sheath breaker BMN are connected in series.

With this configuration, when operating the electric blower BM, the handle of the auxiliary drum AD is moved from the open circuit position a to the closed circuit position b. By moving this handle, the coil for controlling the blower can be
BMK-C is excited, closes the contactor BMK and rotates the electric blower BM. At the same time said coil BMK
Contact BMK-c closes due to the excitation of -C, allowing power running. When the handle of the main drum MD is moved from the open circuit position c to the motor control positions A to N, the main circuit interrupter L is energized and the vehicle enters power running.

When the vehicle coasts after acceleration or stops, move the main drum MD handle to open circuit position c.
Although the power supply to the vehicle drive motor is stopped, the coil BMK-C on the auxiliary drum AP side remains energized, so the contactor BMK remains closed.
The electric blower BM will continue to rotate and blow air unless the BM arm or disconnector CN is artificially disconnected.

Therefore, during commercial operation, even though there is no need to cool the electrical components 2 because the vehicle is stopped or coasting, dust, rain, snow, etc. are unnecessarily sucked in to circulate the cooling air. I ended up
It often adhered to cooling parts and led to grounding accidents.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a control device for a vehicle electric blower that can avoid unnecessary operation of the electric blower and solve problems caused by suction of dust and the like.

The present invention features an auxiliary drum having an open circuit position and a closed circuit position and a handle for moving the drum between the positions; and an auxiliary drum having an open circuit position and a motor control position for moving the drum between the positions. a main controller comprising a main drum having a handle for controlling the vehicle; a motor control circuit for a vehicle drive motor connected to a power source when the handle of the main drum is moved to a motor control position; and a handle for the auxiliary drum. When the handle of the main drum is moved to the closed circuit position and the handle of the main drum is moved to the motor control position, the electric blower control circuit is connected to the power source, and the electric blower control circuit is energized and de-energized by the operation of each of the handles. an electric blower that stops, and a delay circuit that closes when the handle of the main drum is moved to the open circuit position for coasting or stop operation and stops energizing the electric blower control circuit after a predetermined period of time has elapsed; It has the following features.

An embodiment of the present invention will be described below with reference to FIG. Incidentally, the same parts as in FIG. 2 are given the same reference numerals, so detailed explanations will be omitted. In the case of this embodiment, a confirmation device D and an auxiliary relay R are connected so as to communicate with the power source E between the open circuit position a and the closed circuit position b of the auxiliary drum AD. The confirmation device D is provided at the same position as the open circuit position c so that the circuit is closed when the handle of the main drum MD moves to the open circuit position c. Further, when the auxiliary relay R is excited, it operates the blower control circuit breaker CN to temporarily disconnect the circuit.

The master controller MC controls the entire vehicle, and is divided into the main drum MD, which performs power running of the vehicle, and the auxiliary drum AD, which controls the vehicle's auxiliary equipment system.
Each drum is provided with a handle (not shown) that is operated by an operator. In reality, the open circuit positions a and c, the closed circuit position b, the motor control positions A to N, and the confirmation device D are arranged concentrically within each drum, and each handle of each drum is also arranged concentrically. ing. In addition, so that the handle of the main drum MD can be moved only when the handle of the auxiliary drum AD is moved to the closed circuit position b, for example, the handle of the main drum is brought into contact with the rear side in the direction of movement of the auxiliary handle. It is configured such that it cannot be moved independently unless the handle of the auxiliary drum is moved.

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

First, when a vehicle is parked in a garage and business is suspended, the handles of the main drum MD and auxiliary drum AD are in open circuit positions a and c, so the main circuit breaker L and the blower control coil BMK-C is disconnected from power supply E. Also, since the handle of the main drum is in the open circuit position c, the confirmation device D closes the circuit, but the handle of the auxiliary drum AD is also in the open circuit position a, so the auxiliary relay R is also disconnected from the power source E. It will be.

When the vehicle in this state is to be taken out of the garage and started to operate, the handle of the auxiliary drum AD is moved from the open circuit position a to the closed circuit position b. Conventionally, this movement causes the blower control coil BMK-C to be excited by the power source E, which closes the contactor BMK and drives the electric blower BM.
In this embodiment, the activation of the auxiliary relay R by connecting the circuit of the confirmation device D-auxiliary relay R to the power supply E activates the blower control disconnector CN to temporarily disconnect the circuit. The blower control coil BMK-C is not excited, so the electric blower BM is not driven.

Further, by moving the handle of the auxiliary drum AD, the handle of the main drum MD can be moved. Then, when the handle of the main drum MD is moved from the open circuit position c to A of the motor control positions A to N, the confirmation device D opens the circuit due to the movement of the handle and stops the operation of the auxiliary relay R to control the blower. or turn on the disconnector CN. By turning on the blower control switch CN, the blower control coil BMK-C is excited, closes the contactor BMK, drives the electric blower BM, and contacts BMK-C.
Close a. When the contact BMK-a closes, a vehicle drive electric motor (not shown) is driven. Then, by moving the handle of the main drum MD within the range of motor control positions A to N, the vehicle is moved forward and backward for power running.

Next, the case where the vehicle is changed from power running to coasting or stopped will be explained. To coast the vehicle after accelerating the vehicle to a certain speed, keep the handle of the auxiliary drum AD in closed circuit position b and move the handle of the main drum MD to motor control positions A to N.
and return to open circuit position C. Then, since the confirmation device D also closes the circuit, the auxiliary relay R is operated to cut off the blower control shield CN and demagnetize the blower control coil BMK-C. Due to this demagnetization of the blower control coil BMK-C, the contactor BMK opens and stops the electric blower BM, and the contact
Open BMK-a to stop the operation of the main circuit circuit breaker L, and stop energizing the vehicle drive motor.

In this way, the electric blower BM is stopped and the power supply to the vehicle drive electric motor is stopped, so that the vehicle coasts.

When starting power running again from this coasting operation, the electric blower BM is driven by moving the handle of the main drum MD to the motor control positions A to N, contrary to the above.

On the other hand, when stopping the vehicle, the same operation as the steering wheel operation during the coasting operation is performed to stop energization of the vehicle drive electric motor and the electric blower BM, so a description thereof will be omitted.

By the way, in the above embodiment, the operation of the electric blower BM is immediately stopped when the vehicle enters coasting operation or stopped operation, but in some cases, if the air blower is immediately stopped, the temperature of the electrical components may rise temporarily. . Vehicles equipped with such electrical equipment have the disadvantage that the electrical equipment deteriorates more quickly. Therefore, the delay circuit
TD and auxiliary relay TDR connected in series are connected in parallel with the auxiliary relay R, and contact TD-a, which is closed by the auxiliary relay TDR, is connected in series with the auxiliary relay R to form a delay circuit section. It was constructed.

That is, when the vehicle enters coasting operation or stopped operation and the confirmation device D closes the circuit, the delay circuit TD operates the auxiliary relay TDR after a predetermined time has elapsed to close the contact TD-a. As a result, the auxiliary relay R is activated, and the blower control shield breaker CN is cut off, the blower control coil BMK-C is demagnetized, the contactor BMK is opened, and the electric blower BM is stopped. In this case, the time constant of the delay circuit TD is adjusted in accordance with the thermal time constant of the electrical component 2 shown in FIG.

In this way, the electric blower BM is stopped after a predetermined period of time has passed after the vehicle starts coasting or stopped operation, so it is possible to prevent electrical components from deteriorating due to temporary temperature rise, and it is also possible to stop the electric blower BM from coasting or stopped operation. Since unnecessary operation of the electric blower BM is eliminated, problems caused by suction of dust and the like can be solved. In addition, because there are many people gathering and houses at stations and operation areas where trains stop, noise such as the rotating sound of the electric blower BM and ventilation noise can cause discomfort to local residents. However, according to this embodiment, since the electric blower BM is stopped, there is no noise while the vehicle is stopped or coasting, so the discomfort can be reduced.

In each of the above embodiments, the electric blower BM is stopped by disconnecting the blower control shield CN, but as shown in FIG. Instead, a normally closed contact R-b having the same function is provided, and is opened and closed by the auxiliary relay R, and is always open in parallel with this normally closed contact R-b. Disconnector CN―
a is provided so that when the normally closed contact R-b remains open due to a failure in the delay circuit section, the operator manually operates the breaker CN-a to turn off the electric blower BM. It may be directly driven or stopped. Further, by providing such a disconnector CN-a, ventilation can be provided as needed even during coasting operation and stopped operation.

5 to 7 show still another embodiment according to the present invention, and FIG. 5 shows a normally closed contact SD- in parallel with the delay circuit TD on the auxiliary relay R side of the embodiment shown in FIG. b is connected, and this normally closed contact SD-
b: Of course, when the vehicle is coasting or stopped,
It is designed to be closed until the vehicle starts operating at a very low speed (for example, 3 to 5 km/hour) and stops driving.

Therefore, in the case of the embodiment shown in FIG. 5, the electric blower BM stops not only during the above-mentioned coasting operation and stopped operation, but also in the section from the extremely low speed running section to the stop, and the electric blower BM stops. The suspension period can be extended. Since the amount of heat generated by the electrical components in such extremely low-speed travel sections is extremely small, the electrical components will not deteriorate even if the ventilation is stopped.

In the embodiment shown in FIG. 6, a contact BRS that closes when a braking command is issued is provided in place of the normally closed contact SD-b of the embodiment shown in FIG. Therefore, if a braking command is received while the vehicle is stopped or coasting, the electric blower BM is stopped after a predetermined period of stop or coasting has elapsed. Of course, as shown in FIG. 8, instead of the contact BRS,
A contact BPS may be provided that closes on the condition that the brake is actually applied. In this case, for example, the contact point BPS is configured to move as the brake piston moves.

In this way, according to the above embodiment (FIGS. 6 and 7), the electric blower BM can be started and stopped by commands for power running and braking of the vehicle, and unnecessary air blowing can be eliminated. .

As explained above, the present invention makes it possible to stop the operation of the electric blower and stop air blowing when there is no need to cool the electrical components mounted on the vehicle, thereby eliminating unnecessary operation of the electric blower and eliminating dust and dirt. The amount of suction is also reduced overall. Furthermore, since the operation of the electric blower in crowded areas such as stations and operation areas can be reduced, the discomfort caused by the noise of the electric blower can be alleviated.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing the cooling state of a vehicle, FIG. 2 is a conventional electric blower control circuit, FIG. 3 is a diagram showing an embodiment of the present invention, and FIGS. It is a figure which shows another Example. MC...Main controller, MD...Main drum, C...Open circuit position, A to N...Motor control position, D...Confirmation device, R...Auxiliary relay, CN...Shin breaker for blower control, BMK-C...Blower Control coil, BMK-a
…Contact, BMK…Contactor, BM…Electric blower.

Claims (1)

[Scope of Claims] 1. An auxiliary drum having a handle that has an open circuit position and a closed circuit position and moves between these positions, and a handle that has a closed circuit position and a motor control position and moves between these positions. a main controller having a main drum; a motor control circuit of a vehicle drive motor connected to a power source when the handle of the main drum is moved to a motor control position; When the handle of the main drum is moved to the motor control position, the electric blower control circuit is connected to the power source, and the electric blower control circuit is energized and de-energized by operating each of the handles to operate and stop the electric blower. It comprises an electric blower, and a delay circuit that closes when the handle of the main drum is moved to the open circuit position for coasting operation or stop operation and stops energizing the electric blower control circuit after a predetermined period of time. A control device for a vehicle electric blower, characterized in that: 2. An auxiliary drum having an open circuit position and a closed circuit position and having a handle connecting these positions, and a main drum having an open circuit position and a motor control position and having a handle for moving between these positions. a motor control circuit for a vehicle drive motor that is connected to a power source when the handle of the main drum is moved to a motor control position; an electric blower control circuit that is connected to a power source when the handle of the controller is moved to a motor control position; an electric blower that is operated/stopped by energizing and de-energizing the electric blower control circuit by operating each of the handles; a delay circuit section that closes when the drum handle is moved to the open circuit position for coasting operation or stop operation and stops energizing the electric blower control circuit after a predetermined period of time; A control device for an electric blower for a vehicle, comprising a disconnector that connects and disconnects the electric blower control circuit to a power source when power to the electric blower control circuit is stopped.