JP3373446B2 - Automotive cooling system - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle-mounted cooling device mounted under the floor of a vehicle such as a train or a train provided with a skirt for protecting various electric equipments installed under the floor.

[0002]

2. Description of the Related Art A cooler for a vehicle-mounted cooling device that uses running wind is installed under the floor of a vehicle body, and recently, various electric devices including this cooler, which are installed under the floor, are protected from flying stones. From an aesthetic point of view, a skirt that hangs under the floor of the vehicle body is often arranged around the equipment. Therefore, the cooler itself is housed in the equipment box under the floor surrounded by the skirt, that is, the equipment installation space, so that there is a problem that the traveling wind required for cooling does not sufficiently hit the cooler. For example, a cooler for a vehicle-mounted cooling device required for cooling an electric device such as a transformer or a reactor mounted under a vehicle body is disclosed in Japanese Patent Laid-Open No. 58-1291.
Like the natural cooling reactor for a vehicle disclosed in Japanese Patent Publication No. 94, an opening is provided in the traveling direction of the vehicle, and the wind guides are mounted so that the opening directions are point-symmetrical to each other. .

FIG. 7 is a plan view of the vehicle natural cooling type reactor shown in this publication, and FIG. 8 is a front view thereof. In the figure, 100 is a vehicle body, 101 is a skirt that encloses various devices installed under the floor of the vehicle so as to protect them, 102 is the floor of the vehicle, 103 is a device beam provided below the floor 102 of the vehicle, 104 Is a roadbed, and 105 is a transformer installed surrounded by the skirt 101 and the equipment beam 103. In order to cool this transformer 105, the heat exchanger 10
6 is incorporated into the heat exchanger 106 via the blower air duct 107 for blowing air, and the wind guide 1 serves as a pair of wind guides.
08 and 109 are provided. In this one wind collecting guide 108, the end face on the side facing the communicating end portion to the swirl wind passage 107 is opened toward the outside air at one side of the skirt 101 of the vehicle body 100 at a right angle to the downward direction of the skirt 101. Has been done. Incidentally, in order to indicate the traveling direction in the drawing, forward and backward movements of the vehicle are represented by an arrow A indicating forward movement and an arrow B indicating backward movement.

Next, the operation will be described. When the vehicle advances in the direction of arrow A shown in the figure, traveling wind is taken in in the direction of arrow C through the louver 110 from the opening provided on the side surface of the vehicle body and having the angle θ. This angle θ is
It is determined experimentally in consideration of the speed of the vehicle and the influence on peripheral devices. The traveling wind taken in through the opening passes through the wind collecting guide 108 and the Tawami wind passage 107, and then the heat exchanger 106.
After cooling the transformer 105 by exchanging heat on the heat dissipation surface, the wind guide 10 is passed through the other Tawami wind passage 107.
The air is exhausted to the outside of the vehicle through the opening 9 on the side surface of the vehicle body forming an angle θ. When the vehicle travels in the reverse direction, that is, when the vehicle travels in the reverse direction, cooling is performed along the route reverse to the order described above.

[0005]

Problems to be Solved by the Invention JP-A-58-1291
The oil cooler for an in-vehicle transformer described in Japanese Patent No. 94 has the following disadvantages. First, the wind collection guide 10
Since the ventilation path composed of 8, 109, the heat exchanger 106, and the swirl air duct 107 is closed except for the air intake and the air exhaust, the overall pressure loss becomes large and it is difficult to take in a desired air volume. . Secondly, since the ventilation structure is complicated, the space occupancy rate is high and the weight is heavy. Thirdly, since the heat exchanger 106 is installed in the vicinity of the center of the underfloor equipment box surrounded by the skirt, the ventilation path is closed, and thus the cleanability or maintenance workability is poor. Fourthly, since the heat exchanger 106 is covered by the duct, the high-temperature air that has undergone heat exchange particularly when the vehicle is stopped stays in the vicinity of the heat exchanger 106 and impedes heat transfer, resulting in a reduction in cooling capacity. An object of the present invention is to solve these problems and to provide a vehicle-mounted cooling device having a high cooling capacity.

[0006]

According to the present invention, there is provided a vehicle-mounted cooling device for a vehicle having a skirt for protecting equipment installed under the floor, wherein one or both of the skirts parallel to the vehicle running direction is provided. The side surface is provided with a cooler installation space that opens toward the outside of the side surface and is recessed toward the inside of the side surface so that traveling wind generated by forward and reverse movements of the vehicle can flow into the cooler installation space. Is installed.

Further, the present invention is characterized in that wind guide slopes for guiding traveling wind generated by forward and backward movements of the vehicle to the cooler are provided at skirt positions on the front and rear sides of the cooler in the vehicle traveling direction. .

Further, the present invention is characterized in that the skirt is provided with ventilation holes for guiding the traveling wind into the skirt.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiment 1. Embodiment 1 is
On one side surface of the skirt parallel to the vehicle running direction, the running wind generated by the forward and backward movement of the vehicle flows into the cooler installation space that opens toward the outside of the side surface and is recessed toward the inside of the side surface. The cooling device is provided and the cooling device is installed in the cooling device installation space. 1 and 2 are
1 is a sectional view showing a structure in which the cooler of the vehicle-mounted cooling device shown in the first embodiment is attached to the underfloor of a vehicle.
FIG. 2 is a vertical cross section of a plane that passes through the center of the cooler installed under the floor and is horizontal to the floor of the vehicle, and FIG. 2 is a vertical cross section that passes through the center of the cooler and is perpendicular to the floor.

In the figure, 1 is a vehicle body, and 2 is a skirt, which is arranged under the floor so as to surround the equipment installed under the floor so as to protect the equipment. 3 is a floor of the vehicle, 4 is a device beam provided under the floor 3 of the vehicle, 5 is a roadbed, 6 is a transformer or a vehicle-mounted electric device such as a reactor installed under the floor 3, for example, a transformer, Reference numeral 7 denotes a cooler for cooling the cooling medium that has deprived the vehicle-mounted electric device 6 of heat.
Reference numeral 8 is a header constituting the cooler 7, and 9 is an oil distribution pipe for sending oil from the vehicle-mounted electric device 6 to the header 8.

In the conventional vehicle-mounted cooling device, the heat exchanger is installed in the equipment installation space which is surrounded by the skirt 2 under the floor 3 and becomes a closed space. However, in the first embodiment, the cooler is installed. In order to make it easier for the traveling wind to hit 7, the skirt 2 arranged under the floor 3 is opened toward the outside of the side surface on one side surface side extending parallel to the vehicle traveling direction, The skirt 2 is bent and extended so as to form a chiller installation space 11 sufficient to install the chiller 7 of the cooling device.

In the skirt 2 which forms the cooler installation space 11, traveling wind generated by forward and backward movements of the vehicle efficiently flows into the cooler 7 installed.
For example, the wind guide slope 10 is formed in the skirt 2 portion on the front and rear sides of the cooler 7 in the vehicle traveling direction, for example, in the curved portion of the skirt 2 recessed inward. As shown in the drawing, the wind guide slope 10 is formed as a member separate from the skirt 2 member, and is arranged at the original extending position where the extending skirt 2 was cut, and a part of the skirt 2 is formed. You may comprise so that it may be comprised.

In any case, this wind guide slope 10 is
Assuming that the vehicle is moving in the forward direction A, the upstream end of the cooler installation space 11 and the upstream end of the cooler 7, for example, the upstream end of the header 8 can be formed so that traveling wind can easily hit the front surface of the cooler 7. It is configured to form a predetermined angle φ with respect to the traveling direction so as to connect with the wind guide slope 10 portion of the skirt 2 as smoothly as possible. On the other hand, also on the downstream side of the cooler 7, the wind guide slope 10 of the skirt 2 is arranged so that the downstream end of the cooler installation space 11 and the downstream end of the cooler 7 are connected as smoothly as possible.
Make up the part.

The wind guide slope 10 may be a curved surface or a flat surface, and may have any surface shape as long as it can be smoothly connected. However, in order to maximize the intake amount of traveling wind, the cooler 7
The skirt 2 as much as possible without exceeding the vehicle width limit
It is preferable to install so as to be exposed in the lateral direction of the vehicle.

Here, the cooler 7 in the figure will be specifically described. The heat generated from the vehicle-mounted electric device 6 is absorbed in the cooling medium by the sensible heat change of liquids such as water and oil and the latent heat / sensible heat change utilizing the phase change in the compression cycle of CFC gas, alternative CFC gas, etc. It is conveyed to the cooler 7 provided on the side surface side of the vehicle via the oil distribution pipe 9 by means of not shown). In general, the cooler 7 is formed by forming a U-shaped metal tube having a high heat conductivity such as iron, aluminum, or copper, and the cooling tubes are provided in a cross section perpendicular to the traveling direction of the vehicle and the traveling of the vehicle. It is arranged in the direction.

The cooling medium sent to the cooler 7 via the oil distribution pipe 9 is introduced into the inside of the cooling pipe (not shown) constituting the cooler 7, and then transferred to the inner wall of the pipe by convective heat transfer in the pipe. The heat is taken away. Then, the heat transferred to the inner wall of the pipe moves to the outer wall of the pipe by moving along the wall of the pipe by heat conduction. Since the outer wall of the pipe is in contact with the low-temperature and high-speed running wind, heat is carried away by the running wind by convective heat transfer with the outside air. The cooling medium cooled by passing through the cooler 7 returns to the vehicle-mounted electric device 6 through the oil distribution pipe 9 again, and deprives the vehicle-mounted electric device 6 of heat generation. By repeating such a cycle, the vehicle-mounted electric device 6 is cooled using the traveling wind.

When the vehicle is traveling in the direction of arrow A shown in the figure, the cooler 7 is blown with traveling wind in the direction of arrow C.
The running wind enters the cooler 7 from the cooler installation space 11 on the upstream side of the running wind along the wind guide slope 10 having a certain angle φ, collides with the cooling pipe forming the cooler 7, and cools. While drawing heat from the outer wall surface of the pipe, the heat flows out from the middle of the cooler 7 or from the rear end of the cooler 7 to the outside. The traveling wind flowing out from the rear end of the cooler 7 is exhausted to the vehicle side along the wind guide slope 10 which is provided in the rear flow and has the angle φ as described above.

The fluid phenomenon called the Coanda effect is what establishes this wind collecting process. The Coanda effect is a phenomenon in which, when there is a flow near the convex wall surface, the flow bends in the wall surface direction and finally adheres to the wall surface. That is, the wind guide slope 10 according to the first embodiment has a slope in which the skirt 2 is partially replaced at the position where the skirts 2 on the front and rear sides of the installed cooler 7 facing the vehicle traveling direction are arranged. Since the formed flat plate member is connected to the front and rear ends of the cooler 7 as smoothly as possible, the traveling wind is the wind guide slope 1 that constitutes the slope as shown by an arrow C in the figure.
The air is effectively blown to the cooler 7 along the wall surface of 0.

The smaller the angle φ formed by the wind guide slope 10 and the skirt 2 under the floor, the smaller the front and rear end faces of the cooler 7, that is, the front end face of the cooler 7 in the case of forward movement, and the reverse end in the case of backward movement. It is obvious that the amount of traveling air reaching the rear end surface of the cooler 7 increases and the cooling capacity improves, which is extremely preferable. However, since the mounting volume of the wind collecting / exhausting structure is actually limited, it is necessary to set the inclination angle φ to an optimum value as appropriate by experiments or actual vehicle traveling while considering the mounting state. When the vehicle is traveling in the direction of B, the traveling wind enters the inside of the skirt 2 under the floor through the cooler installation space 11 from the direction of the arrow D and follows the wind guide slope 10. Since it reaches the cooler 7, the same operation as described above is realized.

As described above, in the first embodiment, the cooler 7 is exposed to the outside of the skirt 2 arranged under the floor and is arranged on the side surface of the vehicle, and for cooling and exhausting air. Since the air guiding slope 10 is provided, the traveling wind can be effectively guided to the cooler 7 with a simple structure. Further, the cooler 7 is exposed to the space open to the vehicle side, and the air intake / exhaust paths have a simple shape and are exposed to the vehicle side, so maintenance and cleaning work can be easily performed. Further, even when the vehicle is stopped, heat is not trapped inside the underfloor skirt 2 and a good cooling capacity can be exhibited, so that the cooling capacity is not insufficient even when the vehicle is stopped.

Embodiment 2. In the first embodiment, the cooler 7 is arranged on one side surface of both side surfaces of the vehicle. However, in the second embodiment, the cooler 7 is arranged on both side surfaces of the vehicle in order to enhance the cooling capacity. It is a set up configuration. For example, the capacity of the transformer is large, and one cooler 7
Then, if the cooling capacity is insufficient, a pair of coolers 7 may be arranged on both sides of the vehicle body 1 so as to sandwich the on-vehicle electric device 6 therebetween. 3 and 4 show the configuration of the second embodiment. FIG. 3 shows a horizontal cross section through a plane that passes through the center of the cooler 7 installed under the floor and is horizontal to the floor 2 of the vehicle 1. Four
Is a vertical section of a plane that passes through the center of the cooler 7 and is perpendicular to the floor 2.

In FIG. 3 and FIG. 4, the traveling wind generated by the traveling of the vehicle 1 is considered to blow substantially symmetrically although it may be slightly different depending on the terrain or the weather conditions, so that it is provided on both sides. The configuration, that is, the wind guide structure may have a symmetrical shape with respect to the plane of symmetry of the vehicle body 1. Therefore, the configuration of the second embodiment is a configuration in which the vehicle-mounted cooling device of the first embodiment is also arranged on the other vehicle side. Therefore, since the configurations and the components arranged on both sides are substantially the same, the same reference numerals are given and the description thereof is omitted. or,
The operation is also the same as in the case of the above-described first embodiment in which one cooler 7 is installed, and therefore the description thereof will be omitted.

The number of coolers 7 attached to the vehicle-mounted electronic device 6 is not limited to two as shown in FIGS. 3 and 4, and two or more may be installed. In this case, the required number of configurations shown in the first and second embodiments may be provided in another portion of the skirt 2 on the vehicle side surface side. or,
It is also possible to form the cooler installation space 11 wide so that the plurality of coolers 7 can be installed side by side so that the plurality of coolers 7 can be installed in one cooler installation space 11.

Embodiment 3. Since the air existing in the equipment installation space under the floor of the vehicle 1 surrounded by the skirt 2 and the equipment beam 4 is stationary or flowing, naturally, convective heat is generated between the vehicle-mounted electric equipment 6 and the surrounding air. Heat transfer by transfer takes place. Recently, by installing the skirt 2 as described above,
Since the equipment installation space tends to be highly sealed, traveling wind may not enter the equipment installation space even when the vehicle is traveling. In this case, since the heat transfer mode between the vehicle-mounted electric device 6 and the ambient air is only natural convection heat transfer,
The high temperature air stays in the space and the cooling capacity is reduced.

The third embodiment shows a means for solving such a problem. In the first and second embodiments, the air guide hole 10 is provided in the air guide slope 10 so that the traveling wind is positively installed in the equipment installation space. This is a structure for guiding the inside to secure the self-cooling capacity of the main body of the in-vehicle electric device 6. FIG. 5 is a horizontal cross section through a center of the cooler 7 installed under the floor and is horizontal to the floor 2 of the vehicle 1. FIG. 6 is a vertical cross section through a center of the cooler 7 and a plane perpendicular to the floor 2. It is a cross section. It should be noted that configurations and components substantially the same as or equivalent to those of the above-described first and second embodiments are denoted by the same reference numerals and the description thereof will be omitted. In the drawing, reference numeral 12 is a ventilation hole, which is provided in a slit shape between the air guide slope 10 and the front and rear ends of the cooler 7 in the drawing. The ventilation hole 12 may be provided at any position on the wind guide slope 10 or the skirt 2.

The opening shape of the ventilation hole 12 is not limited to the slit shape shown in this example, and may be circular or rectangular. In short, any shape may be used as long as it allows communication between the outer space of the skirt 2 and the device installation space in which the onboard electric device 6 is installed, that is, the inner space of the skirt 2. Further, the number of ventilation holes 12 provided in the wind guide slope 10 or the skirt 2 is not limited to one, and may be plural.

Next, the operation will be described. When the vehicle travels in the direction of the arrow A shown in the drawing, the traveling wind enters the underfloor skirt 2 from the cooler installation space 11 along the wind guide slope 10 as shown by the arrow C. Most of the invading running wind contributes to cooling through the cooler 7 and is exhausted from the inside of the skirt 2 as shown by an arrow C. On the other hand, a part of the traveling wind that has entered enters the equipment installation space under the floor where the on-vehicle electrical equipment 6 is housed, through the ventilation hole 12 provided in the wind guide slope 10, as indicated by arrow E. The traveling wind hits the vehicle-mounted electric device 6 and cools the outer wall surfaces of various devices by convective heat transfer. The traveling wind that has cooled the outer wall surface of the device is exhausted to the outer space of the skirt 2 through the gap between the various devices in the device installation space or the ventilation hole 12 provided in the downstream. Needless to say, the same effect can be obtained when the vehicle travels in the direction of arrow B.

As described above, in the third embodiment, the ventilation hole 1 is formed in the air guide slope 10 in the first and second embodiments.
Since the structure in which the on-vehicle electric device 6 is provided is applied with traveling wind to the on-vehicle electric device 6 to promote heat exchange on the surface of the various on-vehicle electric devices 6 arranged in the device installation space surrounded by the skirt 2. , The cooling capacity can be improved.

[0029]

According to the present invention, since the ventilation passage is not a closed passage as in the conventional case but an open space, the pressure loss, which has been a problem in the past, is eliminated, and the traveling wind with a desired air volume can be obtained with a simple structure. As a result, it is possible to provide a vehicle-mounted cooling device having a high cooling capacity. Further, since the ventilation path is extremely simple, the space occupancy rate is small and the device is lightweight. Further, since the cooler is installed in the open space, maintenance and cleaning work from the outside can be performed efficiently and easily. Further, since the cooler is placed in the open space, the cooling capacity can be exhibited even when the vehicle is stopped.

Further, according to the present invention, it is possible to provide a plurality of coolers, and it is possible to provide a vehicle-mounted cooling device having a larger cooling capacity.

Further, according to the present invention, traveling wind can be applied to the on-vehicle electric devices arranged surrounded by the skirt, and the heat exchange on the surfaces of the various devices can be promoted to cool them. You can improve your ability.

[Brief description of drawings]

FIG. 1 is a horizontal sectional view of a vehicle-mounted cooling device shown in a first embodiment.

FIG. 2 is a vertical sectional view of the vehicle-mounted cooling device shown in the first embodiment.

FIG. 3 is a horizontal sectional view of the vehicle-mounted cooling device shown in the second embodiment.

FIG. 4 is a vertical sectional view of a vehicle-mounted cooling device shown in a second embodiment.

FIG. 5 is a horizontal sectional view of a vehicle-mounted cooling device shown in a third embodiment.

FIG. 6 is a vertical sectional view of a vehicle-mounted cooling device shown in a third embodiment.

FIG. 7 is a horizontal sectional view of a conventional vehicle-mounted cooling device.

FIG. 8 is a vertical sectional view of a conventional vehicle-mounted cooling device.

[Explanation of symbols]

1 vehicle body, 2 skirt, 3 floor, 4 equipment beam, 5 roadbed, 6 vehicle electrical equipment, 7 cooler, 8 header, 9
Oil distribution pipe, 10 wind guide slope, 11 cooler installation space,
12 Ventilation holes.

─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Satoru Koto 2-3-3 Marunouchi, Chiyoda-ku, Tokyo Mitsubishi Electric Corporation (56) Reference JP-A-4-38264 (JP, A) JP-A-7 -101254 (JP, A) JP 58-129194 (JP, A) Actual flat 6-35087 (JP, U) Actual flat 1-145822 (JP, U) Actual 58-22311 (JP, U) ) Actual development Sho 58-145216 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) B60H 1/32 615 B60H 1/00 H05K 7/20 B60K 11/04 F28D 21/00 B60H 1/32 614 B60H 1/32 613 B60H 1/32 621 B60H 1/26 B60H 1/00 102

Claims (3)

(57) [Claims] 1. A vehicle-mounted cooling device for vehicles equipped with a skirt for protecting equipment installed under the floor, wherein the skirt is provided on one or both side surfaces parallel to the vehicle running direction, and on the outside of the side surface. A cooler installation space that is open toward the inside and is recessed toward the inside of the side surface is provided so that traveling wind generated by forward and backward movements of the vehicle flows in, and the cooler is installed in the cooler installation space. In-vehicle cooling system. 2. A wind guide slope for guiding traveling wind generated by forward and backward movement of a vehicle to a cooler is provided at skirt positions on the front and rear sides of the cooler in the vehicle traveling direction. The vehicle-mounted cooling device described. 3. The vehicle-mounted cooling device according to claim 1, wherein the skirt is provided with a ventilation hole that guides traveling wind into the skirt.