JPS6137147B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cooling device for vehicle control equipment, and more particularly to a cooling device that effectively utilizes the air flow of a vehicle.

Among electrical control devices in vehicles, control devices using semiconductors such as thyristors have increased in capacity in recent years, resulting in increased heat generation, and the cooling method has become an important issue.

First, a conventional cooling system will be explained with reference to FIGS. 1 to 3.

In these figures, 1 is a vehicle body, 2 is a control device such as a two-phase chopper type control device installed under the floor of the vehicle body 1, and 3 is a rail. The control device 2 includes a heating element container 4 containing a heating element such as a thyristor.
a, 4b, radiators 5a, 5b that dissipate the heat generated by the heating element, and accessory devices 6a, 6b that are electrically connected to and control the heating element, and these are divided into two sets for each phase. It is integrated into a control unit. Furthermore, the heating element containers 4a, 4b and attached devices 6a, 6b of each control unit are arranged inside the equipment room, and the radiators 5a, 5b are arranged outside the equipment room on the sides thereof in series in the direction of travel of the vehicle. , it is designed to be cooled by the wind from when the vehicle is running.

By the way, when two radiators are arranged in series in the direction of travel of the vehicle, in conventional cooling methods, the distance between the two radiators is set sufficiently large, and the distance between the two radiators is reduced. Alternatively, as shown in FIG. 3, two radiators 5a and 5b are covered with a guide 7 having a U-shaped cross section, and these are arranged in one air duct. A method is adopted in which two heat sinks are used to ventilate in series.

However, the former method is not only inapplicable when there is not enough space (1.5 to 2.0 m) between both radiators, but also when the two radiators are assembled as one device, the device becomes significantly damaged. It becomes large. In addition, in the latter method, if the ventilation resistance per radiator is R, the ventilation resistance will be 2R against the dynamic pressure due to the running wind 8, reducing the amount of ventilation inside the radiator and dissipating heat from the upstream side. Since the air heated by the container flows through the radiator on the downstream side, there is a drawback that the cooling effect, especially the cooling effect of the radiator on the downstream side, is significantly reduced.

An object of the present invention is to eliminate the temperature increase of the traveling air relative to the downstream radiator and the decrease in the amount of ventilation when a plurality of radiators are arranged in series in the traveling direction of the vehicle and these are cooled by the traveling wind. Therefore, it is an object of the present invention to provide a cooling device for vehicle control equipment that can satisfactorily cool each radiator.

A first lower guide is arranged below in the middle of each radiator and guides the traveling wind flowing through the lower space of the upstream radiator to the downstream radiator, and a second lower guide that operates; first and second upper plates disposed above each radiator with a gap between them; and a second upper plate disposed below the radiators, first and second lower plates extending to a predetermined distance from the wind inlet to prevent wind leakage from the lower part; and arranged from the first and second lower guides to the first and second upper plates; It is characterized by providing a side guide that covers the heat radiators and their lower parts and forms a space opening between each of the heat radiators.

An embodiment of the present invention will be described below with reference to FIGS. 4 and 5. In these figures, the same reference numerals as in FIGS. 1 to 3 indicate the same or equivalent parts.

Two radiators 5a and 5b are arranged in series on the side of the control device 2 in the traveling direction of the vehicle, that is, in the direction of air flow, but the distance between these radiators 5a and 5b is relatively short. The distance should be approximately 0.6 to 0.8 m.
In addition, a first lower guide 9a that guides the running wind 8b flowing through the lower space of the upstream radiator 5a to the downstream radiator 5b is provided below in the middle of the radiators 5a and 5b, and the vehicle direction (in this case, the radiator 5b is on the upstream side and the radiator 5a is on the upstream side)
A second lower guide 9b having a similar effect is provided on the downstream side) symmetrically with respect to the traveling direction of the vehicle. The first one has a small gap between the two and approaches the radiator at its center until it touches the radiator.
and the second upper plates 14a, 14b are the radiator 5
A, 5b are provided with first and second lower plates 15a, 15b that extend a certain distance (approximately 1/4 to 2/3 of the total length) from the running wind inlet and prevent wind leakage from the lower part.
are provided respectively, and furthermore, lower guides 9a,
The side guide 1 extends from 9b to the upper plates 14a, 14b so as to cover the radiators 5a, 5b and the space below them and to form an open space between the radiators.
6 is set.

In the cooling device of this embodiment configured in this way, the traveling air 8a directly hits the radiator 5a on the upstream side.
In this example, cooling air of an amount determined by the ventilation resistance R of the radiator 5a is passed through the radiator 5a, and the exhaust air 1 is
1a is pushed by a jet stream 12, which will be described later, and escapes upward or to the side. On the other hand, the traveling wind 8b flowing through the lower space of the upstream radiator 5a is deflected upward by the first lower guide 9a, and due to its inertia becomes a jet flow 12 and flows through the downstream radiator 5b. , and the amount of cooling air determined by the ventilation resistance R of the dynamic pressure flows into the radiator 5b. At this time, upper plates 14a and 14 are provided above, below and to the sides of the radiators 5a and 5b to prevent the running wind from escaping.
b. Since the lower plates 15a, 15b and the side guides 16 are provided, the running wind 8 effectively flows through the radiators 5a, 5b without any air leakage. 11b is running wind 8
This is the exhaust air of b.

Therefore, if the first lower guide 9a is appropriately designed, it will be possible to avoid collision between the frontal collision area of the upstream radiator 5a and the frontal area of the lower space of the radiator 5a. The speed of the wind hitting the front of the radiators 5a and 5b, that is, the amount of ventilation, can be made almost the same, and since the running wind 8b that cools the radiator 5b on the downstream side does not flow through the radiator 5a on the upstream side, these radiators 5a and 5b can be cooled evenly and favorably.

Further, since the cooling air 13a, 13b caused by natural convection can also freely pass through the radiators 5a, 5b, both the natural cooling and the ventilation generated by the traveling wind can be effectively utilized.
In other words, when the vehicle is stationary or at low speeds, the vehicle is cooled by natural convection, and when the vehicle is running at high speeds and the amount of heat dissipated is large, the heat dissipation capacity is increased by using the traveling wind, resulting in an overall well-balanced cooling system. can. 17
a and 17b are exhaust air of the cooling air 13a and 13b.

In addition, the heat sinks 5a, 5b, the lower guides 9a, 9
b. Since the shapes and arrangement of the upper plates 14a, 14b, lower plates 15a, 15b, and side guides 16 are symmetrical with respect to the direction of travel of the vehicle, the same effect can be obtained even when the direction of travel is opposite to that described above. can get.

As explained above, according to the present invention, even when two radiators are arranged in series in the direction of travel of the vehicle and are cooled by running wind, the amount of air flowing through each radiator can be made sufficient. Furthermore, since the traveling wind that cools the radiators on the downstream side does not flow through the radiators on the upstream side, each radiator can be cooled well. In addition, cooling air due to natural convection can freely pass through each radiator, so when the vehicle is stopped or running at low speed, natural convection cools the vehicle.
When the vehicle is running at high speed and the amount of heat dissipated is large, the heat dissipation capacity is increased by ventilation cooling by the running wind, and overall cooling can be achieved in a well-balanced manner. Furthermore, since the running wind effectively flows through each radiator without wind leakage, the cooling effect can be further improved.

[Brief explanation of the drawing]

Fig. 1 is a schematic side view of a vehicle equipped with a control device, Fig. 2 is a longitudinal sectional front view of the same vehicle, Fig. 3 is a side view showing an example of a conventional cooling device, and Fig. 4 is an embodiment of the present invention. Side view of the cooling device according to the example, fifth
The figure is a sectional view taken along the line A--A in FIG. 4. 2...Control device, 4a, 4b...Heating element container,
5a, 5b...radiator, 6a, 6b...attached equipment, 9a, 9b...first and second lower guides,
14a, 14b...first and second upper plates, 15
a, 15b...first and second lower plates, 16...
side guide.

Claims (1)

[Claims] 1 Consists of a heating element container containing a heating element, a radiator that dissipates the heat generated by the heating element, and ancillary equipment that is electrically connected to and controls the heating element 2
A set of control units is installed at the bottom of the vehicle body, the heating element container and attached equipment of each control unit are placed inside the equipment room, and the radiator of each control unit is placed outside the equipment room on the side and in the direction of travel of the vehicle. In a cooling system for vehicle control equipment that is arranged in series and cools these radiators by applying running air to them, the cooling system is arranged below in the middle of the radiators and circulates through the space below the radiator on the upstream side. a first lower guide that guides the running wind to a downstream radiator; a second lower guide that performs the same function when the vehicle runs in the opposite direction; the first one arranged with a gap between
and a second upper plate, first and second lower plates disposed at the lower part of each of the radiators and extending a predetermined distance from the running air inlet to prevent wind leakage from the lower part; A side guide is provided extending from the lower guide to the first and second upper plates, covering each of the radiators and their lower portions and forming a space opening between each of the radiators. cooling system for vehicle control equipment.