JPH0435254Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to the cooling of a vehicle control device, and is particularly concerned with cooling a vehicle control device, which is suspended under the floor of a vehicle and cools the vehicle's running wind without using a forced cooling device such as a blower. The present invention relates to the structure of a wind guide cover in a vehicle control equipment box that introduces air into the interior for cooling.

[Conventional technology]

In recent years, more and more control devices for electric vehicles utilize semiconductor elements such as thyristors. In these vehicle control devices, as the capacity of semiconductor elements has increased, the amount of heat generated has increased, and the cooling method and structure thereof have become important issues.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An example of a conventional vehicle control device of this type that uses freon boiling cooling as a cooling method will be described with reference to the drawings. FIG. 3 is a side view showing how the vehicle control device is suspended from the electric vehicle, and FIG. 4 is a front view showing that the vehicle control device 1 is under the floor of the electric vehicle 2, exceeding the vehicle limit. It is hung so that it is not exposed. The electric vehicle 2 can travel in either direction, forward as indicated by arrow F or backward as indicated by arrow R.

FIG. 5 is an enlarged side view of the vehicle control device shown in FIGS. 3 and 4, and FIG. 6 is a plan view thereof. The vehicle control device 1 is composed of a portion 5 that requires cooling (hereinafter referred to as the cooling portion) and a portion 3 that does not require cooling (hereinafter referred to as the control portion), and the inside of the control device box includes a partition plate 3a. It is separated by.

FIG. 7 is a front view of the cooling section taken along line A--A in FIG. 6. The control section 3 of the vehicle control device 1 is sealed and is only cooled by the running wind from the outer wall of the control device box, but the cooling section 5 includes a fluorocarbon cooling device 4 containing devices that require cooling such as semiconductor elements. At least the radiator part of the cooling part 5 is housed in the cooling part 5, and in order to allow the vehicle running wind to pass through the cooling part 5, a large number of exhaust holes P are provided in the ceiling plate 5a, and the outer surface parallel to the vehicle running direction is largely opened. , the opening is covered by a wind guide cover 6 that protrudes outward from an outer surface 3b of the control portion 3 that is parallel to the vehicle running direction.

The air guide cover 6 prevents the equipment inside the cooling part 5 from being heated by direct sunlight or heat reflected from the roadbed while the vehicle is stopped, and also prevents stones from flying off the track while the vehicle is running. Although it also has a function, its main purpose is to take in the running wind from the openings in the front and rear end faces 6a in the vehicle running direction.

Therefore, a net portion having a large number of air inlet holes Q is provided on the front and rear end surfaces 6a of the wind guide cover 6 in the vehicle running direction, and as shown in FIG. The air guide plate 7 is placed at the center of the air guide cover 6 at an angle of approximately 45° with respect to both running directions so that the air is introduced into the cooling portion 5 even when the vehicle is running. It is set in.

In the above explanation, it has been explained that the air inlet of the air guide cover 6 is provided with a large number of air inlet holes Q, and the exhaust part of the cooling section 5 is provided with a large number of exhaust holes P, but it is sufficient to provide air holes that prevent foreign matter from entering. Therefore, a net may be installed instead of configuring with these many holes.

With the air guide cover 6 having such a structure, while the vehicle is running, the running air is introduced into the cooling part 5 from the air intake hole Q provided on the end surface 6a on the front side in the running direction, and the ceiling plate 5a of the cooling part 5 is By exhausting air from the exhaust hole P provided in the cooling part 5, the fluorocarbon cooling device 4 and the like housed in the cooling part 5 are cooled.

When the vehicle is stationary, air enters through the air intake holes Q provided on both the front and rear end faces 6a of the wind guiding cover 6, and is exhausted from the exhaust holes P provided on the ceiling plate 5a of the cooling section 5. This causes air to flow inside the cooling section 5. Cooling.

[Problem that the invention attempts to solve]

In the conventional air guide cover 6 as described above,
There was a drawback that the amount of running air introduced into the cooling section 5 was small. When we investigated the cause of this, we found the following.

FIG. 2 is a partially enlarged cross-sectional view taken along the line B--B in FIG. 7. The cooling portion 5, which is separated from the control portions 3 on both sides by the partition plate 3a, has a large opening on the outer surface parallel to the vehicle running direction, and the opening protrudes outward from the outer surface 3a of the control portion 3 to guide air. cover 6
is provided to cover this opening.

A large number of air intake holes Q are provided on both front and rear end surfaces 6a of the wind guide cover 6 in the vehicle running direction, each having approximately 45 inlet holes Q in both the running directions so that the running wind can be introduced into the cooling portion 5. A wind guide plate 7 is provided at the center of the wind guide cover 6 so as to form an angle of .degree.

When the vehicle travels toward the left side of the screen, the traveling wind is as shown by the arrow. That is, the wind guide cover 6
When the running wind hits the front end surface 6a of the
The pressure at the front increases due to the fluid resistance caused by the net portion made up of the net, and the traveling wind for the entire area of the front end face 6a is not introduced into the wind guide cover 6, but a large portion escapes to the outside of the wind guide cover 6. .

Therefore, less traveling air is introduced into the cooling portion 5 by the air guide plate 7.

"Means for Solving the Problems" Based on the results of the investigation into the causes described above, the present invention has developed a mesh section to prevent foreign matter from entering the cooling section.
By providing the wind guide cover slightly inward from both end faces which are opened in the front and back in the traveling direction, the area outside of this net portion is used as a guide portion, and this guide portion is also provided with a net to prevent foreign matter from entering so as to lead to the cooling portion. It is equipped with ventilation holes.

With this configuration, since there is no fluid resistance at the traveling wind intake of the wind guiding cover, the traveling wind corresponding to the entire area can be taken into the wind guiding cover. The traveling wind introduced into the wind guide cover increases pressure when it hits the mesh part provided at the part set back from the end face of the wind guide cover, but due to the action of the guide part, it cannot escape to the outside of the wind guide cover. It flows into the cooling section through the ventilation hole, which is equipped with a mesh to prevent foreign matter from entering.

The wind that travels straight through the wind guide cover and passes through the net section is also diverted by the wind guide plate and introduced into the cooling section, so all of the wind that covers the entire area of the front end of the wind guide cover is transferred to the cooling section. It can be introduced into

〔Example〕

FIG. 1 is a horizontal sectional view similar to FIG. 2 of an embodiment of the wind guide cover according to the present invention, and the same reference numerals as in FIG. 2 indicate the same parts.

The cooling portion 5 separated from the control portions 3 on both sides by the partition plate 3a is covered with an air guide cover 6 whose outer surface parallel to the vehicle running direction projects outward from the outer surface 3b of the control portion 3.

This air guide cover 6 has both front and rear end faces 6a in the vehicle running direction open all over, and a net portion 6b having air inlet holes Q is provided at a portion retreating inward from both end faces 6a to prevent foreign matter from entering. It is being

Of the outer surface of the cooling portion 5 covered by the air guide cover 6, only the inner side of the net portion 6b is largely opened, and the central portion of the air guide cover 6 has a diameter of approximately 45 mm in both running directions. A wind guide plate 7 is provided so as to form an angle of .degree., and is configured to introduce the running wind into this opening.

Net portion 6b from both end surfaces 6a of the wind guide cover 6
The portion between the two ends becomes a guide portion 6c. The outer surface of the cooling part 5 covered by the guide part 6c is provided with a ventilation hole 5b equipped with a net for preventing foreign matter from entering.

According to the wind guide cover of the vehicle control device configured in this manner, when the vehicle travels toward the left side of the screen, the traveling wind flows as shown by the arrow. That is, since there are no obstructions on the front end surface 6a of the wind guiding cover 6, the traveling wind corresponding to the entire surface area enters the inside of the wind guiding cover 6.

The running wind that has entered the wind guide cover 6 is removed from the mesh portion 6b.
The pressure rises as the wind hits the cooling part 5, but the air is blocked by the guide part 6c and does not escape to the outside. Part of it flows into the cooling part 5 through the ventilation hole 5b equipped with a mesh, and the other part Pass through the net section 6b and go straight.

The traveling wind that has gone straight through the wind guide cover 6 and passed through the net portion 6b is also changed in direction by the wind guide plate 7 and introduced into the cooling part 5, so that the entire front end surface 6a of the wind guide cover 6 is The integral traveling wind is introduced into the interior of the cooling section 5.

[Effect of idea]

As explained in detail above, according to the air guide cover for a vehicle control device according to the present invention, the blowing air corresponding to the entire area of the running air intake of the air guide cover protruding from the outer surface of the control device box is transferred to the cooling portion. Since the cooling device can be introduced into the interior, there is no need to leave room for the air guide cover, and the cooling device can also be made smaller.

Although the above explanation has been given for the case of a fluorocarbon boiling cooling system which is divided into a cooling section and a control section, it is of course applicable to any cooling system that utilizes running air.

[Brief explanation of drawings]

FIG. 1 is a horizontal sectional view of an embodiment of the air guide cover for a vehicle control device according to the present invention, FIG. 2 is a horizontal sectional view of an example of a conventional air guide cover, and FIG. 3 is a horizontal sectional view of an example of a conventional air guide cover. A side view showing an example of a suspension situation from an electric car, FIG. 4 is a front view, FIG. 5 is a side view, and FIG.
FIG. 4 is an enlarged side view of the vehicle control device shown, FIG. 6 is a plan view thereof, and FIG.
It is a front view of the cooling part seen from the A line. 1...Vehicle control device, 2...Electric car, 3...
Control part, 3a...partition plate, 3b...outer surface,
4... Freon cooling device, 5... Cooling part, 5a...
...Ceiling board, 5b...Vent hole with mesh, 6...Wind guide cover, 6a...End face, 6b...Mesh part, 7...
...Wind guide plate.

Claims (1)

[Scope of utility model registration request] A wind guide cover for a vehicle control device, which is configured to introduce the running wind of the vehicle into the interior for cooling purposes, and is provided so as to protrude from a side surface parallel to the vehicle running direction of a vehicle control device box suspended under the floor of the vehicle. In this case, a mesh section is provided slightly inside the running air intake which is fully open at both front and rear ends in the vehicle running direction to prevent foreign matter from entering the interior. A baffle plate is provided so as to introduce the subsequent air flow into the vehicle control device box, and a guide portion outside the net portion is also provided to prevent foreign matter from entering the vehicle control device box. An air guide cover for a vehicle control device, characterized in that a ventilation hole is provided with a mesh.