JP2009096317A - Cooling structure of vehicle control device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To eliminate the problem that it becomes difficult to radiate heat through automatic convection from a ceiling surface of a vehicle control device with an increase in internal temperature of the vehicle control device above an allowable value and with a certain trouble generated at equipment when the upper side of the vehicle control device installed at the vehicle ceiling is provided with a heat shielding plate. <P>SOLUTION: A heat shielding plate 1 arranged at the upper side of a vehicle control device 2 is provided with an acute guide plate 5 and an opening 6. Direct sun-shining is prevented from being applied to it and when the vehicle is under its parking state, heat is radiated from a clearance 4 through the opening 6 under automatic convection. In addition, when the vehicle is running on the road, wind generated during the running is supplied from the opening 6 formed in the heat shielding plate 1 into the clearance 4 between the heat shielding plate 1 and a ceiling surface 1a and discharged out of the opening 6, thereby the radiation with enforced convection is allowed and it is possible to prevent the internal temperature of the vehicle control device from being increased. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a cooling structure for a vehicle control device that suppresses a temperature rise in a vehicle control device mounted on a roof of a railway vehicle.

  In recent years, for example, a hybrid train that combines an engine and a power storage device has been proposed as one form of railway vehicle. By providing a power storage device, a hybrid electric vehicle can store electrical energy generated by an engine-driven generator in the power storage device, and can temporarily absorb regenerative energy generated during braking by the power storage device. It is possible, and by reusing this absorbed regenerative energy as part of the energy required for powering, energy saving is realized along with environmental measures. There are two types of hybrid pneumatic vehicles: a parallel system that can drive the drive wheels with either an engine or a motor, and a series system that operates a generator with the engine and drives the drive wheels with only the motor.

  In such a hybrid vehicle, as shown in FIG. 10, a battery as a power storage device and a related vehicle control device 2 are provided on the roof structure of the vehicle body 3 as a roof top equipment. When the vehicle control device 2 is exposed to the direct sunlight 7 from the sun 12, the internal temperature rises, which may cause a failure or malfunction of the vehicle control device 2. In order to avoid such a situation, a heat shield plate 31 is attached with a gap 4 between the top plate 2 a of the vehicle control device 2. The heat shield plate 31 prevents the vehicle control device 2 from being exposed to the direct sunlight 7 and suppresses a temperature rise in the vehicle control device 2.

  In the measure that the heat shield plate 31 is provided above the top plate 2a of the vehicle control device 2 described above, the direct sunlight 7 is shielded by being reflected by the heat shield plate 31 and so on, and the rise in the internal temperature is suppressed. Although it can be achieved, conversely, the presence of the heat shield plate 31 prevents the heat radiation from the top plate 2a of the vehicle control device 2. A part of the convection 5 that has received heat from the top plate 2 a flows into the outside air from the side of the gap 4, but a part of the convection 5 lies in the gap 4 and may not be easily discharged outside. If the total value of the internal temperature rise and the outside air temperature exceeds the allowable temperature of the internal device of the vehicle control device 2 due to the heat generated by the device in the vehicle control device 2, a failure occurs in the vehicle control device 2. It becomes easy.

Therefore, in addition to suppressing the temperature rise due to direct sunlight, it also promotes heat dissipation from the ceiling surface of the vehicle control device by guiding the ventilation inside and outside the heat shield plate when the vehicle is stopped or running There are issues to be solved.
An object of the present invention is to provide a structure capable of suppressing a temperature rise due to direct sunlight and at the same time efficiently radiating heat from the ceiling surface of the vehicle control device, thereby suppressing a temperature rise inside the vehicle control device. There is to do.

  In order to solve the above problems and achieve the above object, a cooling structure for a vehicle control device according to the present invention is provided on a top plate of a vehicle control device with a gap provided between the top plate and the top plate. A ventilation guide is provided with a heat plate, and a ventilation window is formed in the heat shield plate to allow the gap to communicate with outside air. The ventilation guide is related to the ventilation window and is inclined toward the front-rear direction of the vehicle and guides the airflow through the ventilation window. A plate is provided.

  According to this cooling structure for a vehicle control device, a heat shield plate is provided above the top plate of the vehicle control device, a ventilation window is formed in the heat shield plate, and a ventilation guide is associated with the ventilation window. Because the plate is provided, the convection generated in the gap is easily discharged to the outside through the ventilation window when the vehicle is stopped, and the generated wind is transmitted to the heat shield plate and the top plate of the vehicle control device while the vehicle is running. Therefore, heat dissipation from the top plate of the vehicle control device is efficiently promoted.

  According to the cooling structure for a vehicle control device of the present invention, the heat shield plate provided with a gap on the top plate of the vehicle control device prevents direct sunlight from being exposed to the sun, and at the same time when the vehicle is stopped. Radiates heat from the top plate of the vehicle control device by natural convection, and when traveling, heat is released by forced convection by introducing wind into the gap formed between the top plate of the vehicle control device and the heat shield plate. In addition, an increase in the internal temperature of the vehicle control device can be suppressed.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 5 are views showing a first embodiment of a cooling structure for a vehicle control device according to the present invention, FIG. 1 is a perspective view of the cooling structure according to the first embodiment, and FIG. 2 is a vehicle shown in FIG. It is a perspective view which shows an example of the vehicle to which the cooling structure of the control apparatus for vehicles was applied.

  As shown in FIG. 2, the vehicle control devices 2, 2 are arranged on the upper surface of the roof structure of the vehicle body 3 so as to be spaced apart in the longitudinal direction of the vehicle body. For example, in the case of the above-described hybrid pneumatic vehicle, the vehicle control devices 2 and 2 have a battery and a control unit therein, and these devices are usually housed in a relatively flat rectangular housing. Contained.

  Next, a vehicle control device 2 that best shows the characteristics of the cooling structure of the vehicle control device according to the present invention, and an enlarged view of the heat shield plate 1 attached to the vehicle control device 2 are shown. It is shown in 1. The heat shield plate 1 covering the top plate 2a of the vehicle control device 2 is a generally flat plate, and as shown in the figure, at the four corners, support columns 9, 9, 9 (the innermost support columns) having relatively short heights. Is supported by a heat shield plate 1 (not shown). A gap 4 is formed between the lower surface of the heat shield plate 1 and the top plate 2a. In addition, the number of the support | pillars 9 can increase not only in the four corners as shown in figure but in the position which does not have trouble with the convection for exhaust heat, such as the side along the vehicle longitudinal direction of the heat shield plate 1.

  A plurality of heat shield plates 1 are formed by cutting and raising the heat shield plate 1 so that the heat shield plate 1 opens at an acute angle in both longitudinal directions with respect to the main body 1a of the heat shield plate 1 at an end portion and an intermediate portion in the vehicle longitudinal direction. The guide plate part 5 is provided. The guide plate portion 5 is formed by bending a part of a rectangular shape of the heat shield plate 1 with respect to the main body 1a with a line 5a (only a part is provided with a reference numeral) extending in parallel with the vehicle body lateral direction. It is formed by waking up. As will be described later, the rectangular shape is a shape that is wide in the left-right direction of the heat shield plate 1 so as to ventilate a widely captured wind. A ventilation window 6 is opened at the trace where the ventilation guide plate 5 is cut and raised. The ventilation window 6 is formed as a hole in the heat shield plate 1 or as a notch from the edge of the vehicle in the front-rear direction of the vehicle. The guide plate 5 is formed so as to have an opening 6 a that opens in that direction and is connected to the ventilation window 6 in the direction closer to each end of the vehicle body 3 from the center of the heat shield 1. . In this embodiment, the side of the guide plate portion 5 has a small triangular opening 6b (only a part of each of the opening 6a and the small opening 6b is provided with a reference numeral) with respect to the main body of the heat shield plate 1. . In addition, about formation of the guide plate part 5, you may comprise not only raising but a guide plate prepared separately in connection with the ventilation | gas_flowing window 6. FIG.

  FIG. 3 is a diagram for explaining the operation of the cooling structure of the first embodiment while the vehicle is stopped. When the vehicle is stopped, the direct sunlight 7 from the sun 12 that hits the main body 1a of the heat shield plate 1 or the guide plate portion 5 from the upper part is reflected there as shown by the arrow. Do not hit 2. Therefore, the heat dose of the direct sunlight 7 which hits the vehicle control device 2 is reduced, and the temperature increase in the vehicle control device 2 and its interior can be suppressed.

  The heat generated inside the vehicle control device 2 is radiated from the top plate 2a of the vehicle control device 2 by convection. As shown by the arrows, this convection is guided from the top plate 2a of the vehicle control device 2 through the ventilation window 6 along the inside of the inclined surface of each guide plate portion 5, and each opening 6a or triangular small opening 6b. Therefore, the heat generated inside the vehicle control device 2 is discharged to the outside of the heat shield plate 1.

  FIG. 4 is a diagram illustrating the operation of the cooling structure according to the first embodiment during vehicle travel. While the vehicle is running, the action of the heat shield 1 that shields the direct sunlight 7 from the sun 12 is the same as when the vehicle is stopped, and therefore the description thereof is omitted. Assuming that the vehicle is traveling toward the right side of the drawing, the wind 10 generated during traveling is the opening 6a formed by the guide plate portions 5 and 5 near the upstream end and the center of the heat shield plate 1. 6a, is introduced into the gap 4 between the heat shield plate 1 and the ceiling surface 2a of the vehicle control device 2 through the ventilation window 6, flows along the gap 4, and then downstream of the heat shield plate 1. The air flows out as exhaust air 11 through the openings 6a and 6a formed by the ventilation window 6 and the guide plate portions 5 and 5 near the end portion and the central portion on the side. Therefore, the heat generated inside the vehicle control device 2 is dissipated from the top plate 2 a of the vehicle control device 2 by forced convection consisting of the wind 10 and the exhaust air 11.

  FIG. 5 is a diagram illustrating a state in the case where the first embodiment is illuminated by the sun at a low altitude. As shown in FIG. 5, when the altitude of the sun 12 is lower than the guide plate portion 5 formed on the heat shield plate 1, direct sunlight 7 a hits the top plate 2 a of the vehicle control device 2. However, since the height of the sun 12 is low in the early morning or evening time periods when the temperature is low, or in the low temperature season, the sum of the temperature rise value and the temperature inside the vehicle control device 2 is the vehicle control device. Since the temperature is lower than the allowable temperature of the components mounted inside 2, no equipment failure occurs due to the temperature rise.

  FIGS. 6-9 is a figure which shows 2nd Embodiment of the cooling structure of the control apparatus for vehicles by this invention. In the second embodiment, the same reference numerals are used for the same components and parts as those in the first embodiment, and the description thereof is omitted. 6 is an enlarged perspective view of the second embodiment, FIG. 7 is a perspective view of the entire vehicle to which the cooling structure of the second embodiment is applied, and FIG. 8 is a cooling of the vehicle control device by natural convection while the vehicle is stopped. FIG. 9 is a diagram for explaining cooling of the vehicle control device by forced convection during vehicle travel.

  The second embodiment is different from the first embodiment in that the shielding plate 21 has a skirt portion 22 around it. The skirt portion 22 continuously extends from the main body 21a of the shielding plate 21 to the upper periphery of the vehicle control device 2 so that the gap 4 between the shielding plate 21 and the top plate 2a does not open to the periphery. The gap 4 is covered from the side. The skirt portion 22 blocks direct sunlight 7 of the sun 12 from being inserted into the top plate 2 a of the vehicle control device 2 through the gap 4. Therefore, since the direct sunlight 7 is prevented from further hitting the top plate 2a of the vehicle control device 2, the temperature rise inside the vehicle control device 2 can be further suppressed. The heat dissipation by natural convection shown in FIG. 8 is the same as the heat dissipation of the first embodiment shown in FIG. On the other hand, since a plurality of small windows 23 for ventilation are formed in the skirt portions 22a and 22a in the front-rear direction, the small windows in which the wind 10 is formed in the skirt portion 22a in the forced convection shown in FIG. After being introduced into the gap 4 through 23 and flowing along the gap 4, it is discharged as exhaust air 11 through the small window 23 formed in the opening 6 or the skirt portion 22a.

  Further, in the first embodiment, the triangular window portion 6b is formed between the guide plate portion 5 and the main body 21a of the shielding plate 21, whereas in the second embodiment, this window portion 6b is a main body. It is closed by a triangular side plate 24 connected to 21 a and the guide plate portion 5. With such a structure, the guide plate portion 5 is connected to the main body 21a by the line 5a and is supported by the main body 21a via the side plates 24 at both ends, so that the support of the guide plate portion 5 to the main body 21a can be strengthened. It is possible to prevent vibration and deformation due to the force of wind and the weight of snow.

The expansion perspective view which shows 1st Embodiment of the cooling structure of the control apparatus for vehicles by this invention. FIG. 2 is a perspective view showing the vehicle body in a state in which the first embodiment shown in FIG. 1 is mounted on the vehicle control device. The figure explaining the effect | action which 1st Embodiment of this invention show | plays when a vehicle stops. The figure explaining the effect | action which 1st Embodiment of this invention show | plays at the time of vehicle travel. The figure which shows 1st Embodiment of this invention when the position of the sun becomes low altitude. The expansion perspective view which shows 2nd Embodiment of the cooling structure of the control apparatus for vehicles by this invention. The perspective view which shows the vehicle body of the state in which 2nd Embodiment shown in FIG. 6 was equipped with the control apparatus for vehicles. The figure explaining the effect | action which 2nd Embodiment of this invention show | plays when a vehicle stops. The figure explaining the effect | action which 2nd Embodiment of this invention show | plays at the time of vehicle travel. The figure which shows the attachment state of the conventional vehicle control apparatus and a heat shield.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Heat shield board, 1a ... Heat shield board main body, 2 ... Vehicle control apparatus, 2a ... Top plate, 3 ... Vehicle body, 4 ... Gap between vehicle control apparatus and heat shield board, 5 ... Guide plate part, 5a ... Line, 6 ... Ventilation window, 6a ... Opening, 6b ... Small opening, 7 ... Direct sunlight, 8 ... Ascending current, 9 ... Strut, 10 ... Wind generated during running, 11 ... Exhaust air, 12 ... Sun, 21 ... Shielding Plate, 22 ... Skirt, 23 ... Small window, 24 ... Side plate

Claims (6)

On the top plate of the vehicle control device mounted on the roof structure of the vehicle, a heat shield plate provided with a gap between the top plate and the top plate,
The heat shield plate is formed with a ventilation window that allows the gap to communicate with outside air,
A cooling structure for a vehicle control device, wherein a ventilation guide plate that is inclined toward the front-rear direction of the vehicle and guides an airflow passing through the ventilation window is provided in relation to the ventilation window. In the cooling structure of the vehicle control device according to claim 1,
The vent window is formed as a hole in the heat shield plate or as a notch from the front-rear direction edge of the vehicle of the heat shield plate;
A cooling structure for a vehicle control device. In the cooling structure of the vehicle control device according to claim 1 or 2,
The ventilation guide plate is formed by cutting and raising a part of the heat shield plate,
The ventilation window is opened to a mark formed by cutting the ventilation guide plate;
A cooling structure for a vehicle control device. In the cooling structure of the vehicle control device according to claim 3,
Side edges of the vehicle in the left-right direction of the ventilation guide plate are connected to the heat shield plate via a reinforcing plate;
A cooling structure for a vehicle control device. In the cooling structure of the vehicle control device according to any one of claims 1 to 4,
The heat shield plate has a skirt portion that covers the gap from the side;
A cooling structure for a vehicle control device. In the cooling structure of the vehicle control device according to claim 5,
A small window for ventilation is formed in a portion corresponding to the gap in the skirt portion provided in the front-rear direction of the vehicle;
A cooling structure for a vehicle control device.

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