JPH10157617A - Control device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a control device for a vehicle to be arranged on the exhaust side of a cooling passage without increasing the size of an electric motor for a blowing device. SOLUTION: A control device for a vehicle is constituted such that a cooling passage 9 to cool electric apparatuses through ventilation is arranged in a control box 4 containing a plurality of electric apparatuses 6 and 7 and a blowing device 13 is arranged on the exhaust side of the cooling passage 9. The cooling passage 9 is partitioned by a heat insulation cover 18 to form an electric motor chamber 19. An electric motor 15 of which the blowing device consists is arranged in the electric motor chamber 19 and a ventilation port through which the electric motor chamber 19 is released to the outside of the control box 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for a vehicle, and more particularly to a cooling device for a control device for a vehicle mounted under the floor of a vehicle body.

[0002]

2. Description of the Related Art Generally, for cooling a vehicle control device mounted under a vehicle body floor, a cooling passage is formed in a control box containing a plurality of electric devices for cooling the electric devices by ventilation.
An air blower for blowing air for cooling is installed in the cooling passage (Japanese Patent Laid-Open No. 60-76461).

[0003]

In the above configuration, the blower may be installed on the intake side or the exhaust side of the cooling passage depending on the arrangement of the electric equipment in the control box. When the air blower is installed in the air conditioner, the exhaust gas temperature may be around 90 ° C. in summer.

[0004] For this reason, the electric motor of the blower installed on the exhaust side must improve the heat radiation performance or reduce the amount of heat generation. As a result, the electric motor becomes large and the weight increases. There's a problem.

An object of the present invention is to provide a vehicle control device that can be installed on the exhaust side of a cooling passage without increasing the size of a motor of a blower.

[0006]

In order to achieve the above object, the present invention forms a cooling passage for cooling the electric equipment by ventilation in a control box containing a plurality of electric equipment, and exhausts the cooling passage. In the vehicle control device having a blower installed on the side, the cooling passage is partitioned by a heat shield cover to form a motor room, and a motor constituting the blower is installed in the motor room, and the motor room is A ventilation opening was provided outside the control box.

[0007] With the above configuration, the motor for the blower in the motor room is not exposed to the exhaust heat of the cooling passage, and the air in the motor room is ventilated, so that the temperature rise of the motor is small. In addition, there is no need to increase the size of the motor in consideration of the heat radiation performance and the amount of heat generated, and the weight does not increase.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS.

[0009] Under the floor 2 of the vehicle body 1, the skirt 3
The control box 4 is mounted in a space surrounded by A and 3B. The control box 4 is suspended below the floor 2 of the vehicle body 1. The skirts 3A and 3B have ventilation windows 5A and 5B, respectively.
Is provided.

The control box 4 has a closed chamber 8 formed in the width direction of the vehicle body to block a plurality of electric devices 6 and 7 from outside air.
A cooling passage 9 extending over the entire width of the control box 4 is formed in an upper portion of the closed chamber 8. One end of the cooling passage 9 is provided with an intake port 10 facing the ventilation window 5A, and the other end is provided with an exhaust port 11 facing the ventilation window 5B.

In the cooling passage 9 on the upper side of the closed chamber 8, heat radiating portions 6R and 7R for dissipating heat generated by the electric devices 6 and 7 are located. A blower 13 is located between the end of the closed chamber 8.

The blower 13 comprises a blower 14, a motor 15 for driving the blower 14, and a blower cover 16 having an opening 17 facing the exhaust port 11. The motor 15 is connected to the cooling passage 9. Are installed in a motor room 19 formed by partitioning the heat shield 18 with a heat shield cover 18.

The motor room 19 is provided with a ventilation port 20 which opens toward the exhaust port 11 side, and a filter 21 is attached thereto. Furthermore, this motor room 19
Is provided with a communication hole 22 that communicates with the cooling passage 9.

In the above configuration, heat generated from the electric devices 6 and 7 during operation of the vehicle is dissipated by the heat radiating portion 6 in the cooling passage 9.
R and 7R, as shown by the large arrow, the outside air is blown by the operation of the blower 13 so that the ventilation window 5A-inlet 10-
Cooling passage 9-blower cover 16-opening 17-exhaust port 1
1- Since the air flows through the ventilation window 5B, the heat transmitted from the heat radiating portions 6R and 7R is dissipated by the passage of the outside air and is released outside the vehicle body.

As indicated by hatching, the air heated by passing through the heat radiating portions 6R and 7R has a high-temperature region HT on the exhaust side of the cooling passage 9, and the blower 13 installed therein is exposed to a high temperature. However, since the electric motor 15 constituting the blower 13 is installed in the electric motor room 19 formed by the heat shield cover 18, the electric motor 15 is not exposed to the high temperature. Since the opening 20 is provided, when the temperature inside the motor chamber 19 becomes higher than the outside air, as shown by a small arrow, the low-temperature outside air enters and performs heat exchange, so that the motor 15 does not become hot. . For this reason, even if the blower 13 is installed on the exhaust side of the cooling passage 9, it is not necessary to increase the capacity of the electric motor 15 so as to withstand particularly high temperatures and make the motor 15 large. The size of the motor when installed may be sufficient.

Further, since the communication hole 22 communicating with the inside of the cooling passage 9 is provided in the motor room 19, it becomes easy to introduce outside air from the ventilation port 20 into the motor room 19. That is, the inside of the cooling passage 9 in which the motor room 19 is installed is
The outside air is sucked into the cooling passage 9 from the communication hole 22, enters the blower cover 16, and is discharged from the opening 17 facing the exhaust port 11. For this reason, introduction of outside air from the ventilation opening 20 into the motor room 19 becomes easy.

In the above embodiment, one blower 14 is provided as the blower 13. As shown in FIG. 3, two blowers 14A and 14B are provided on both sides of the electric motor 15, and the electric equipment 6 is provided. , 7 may be improved in cooling efficiency.

4 and 5 show another embodiment of the present invention.

The structure different from the above embodiment is that the opening position of the ventilation port 20 of the motor room 19 is different from the exhaust port 1 of the cooling passage 9.
This is a configuration that is located downward so as to be different from 1 by 90 °, and the other configuration is the same as that of the above-described embodiment.

As described above, by setting the opening position of the ventilation opening 20 of the motor room 19 downward, it is possible to prevent rainwater or the like from entering, and heat exhausted from the exhaust opening 11 of the cooling passage 9 is transferred to the ventilation opening. 20 can be prevented from entering.

FIG. 6 shows that two blowers 14A and 14B are provided on both sides of a motor room 19 having a downward ventilation port 20.
This is a configuration for increasing the cooling efficiency of the electric devices 6 and 7.

[0022]

As described above, according to the present invention, it is possible to obtain a vehicle control device which can be installed on the exhaust side of the cooling passage without increasing the size of the motor of the blower.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional front view showing a relationship between a vehicle control device and a vehicle body according to the present invention.

FIG. 2 is a right side view of the vehicle control device of FIG.

FIG. 3 is a diagram corresponding to FIG. 2, showing another embodiment of the vehicle control device;

FIG. 4 is a view corresponding to FIG. 1, showing still another embodiment of the vehicle control device.

FIG. 5 is a right side view of the vehicle control device of FIG. 4;

FIG. 6 is a diagram corresponding to FIG. 5, showing another embodiment of the vehicle control device;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Body, 4 ... Control box, 6, 7 ... Electric equipment, 9 ... Cooling path, 10 ... Inlet, 11 ... Exhaust port, 13 ... Blower, 1
4 ... Blower, 15 ... Electric motor, 18 ... Heat shield cover, 19 ...
Motor room.

Claims (3)

[Claims] 1. A control device for a vehicle, wherein a cooling passage for cooling said electric device by ventilation is formed in a control box containing a plurality of electric devices, and a blower is installed on an exhaust side of said cooling passage. A passage is partitioned by a heat shield cover to form a motor room, a motor constituting the blower is installed in the motor room, and a ventilation opening for opening the motor room outside the control box is provided. Vehicle control device. 2. A control device for a vehicle according to claim 1, wherein a communication hole communicating between said motor room and said cooling passage is provided in said heat shield cover. 3. The control device for a vehicle according to claim 1, wherein the ventilation port is located in a different direction from an exhaust port of the cooling passage.