JP2019031188A - Electric device cooling structure of vehicle - Google Patents

Abstract

To provide an electric device cooling structure of a vehicle which effectively cools an electric device disposed in an engine room with travel wind taken into the engine room from an outer air intake opening of a front bumper face through a heat exchanger and concurrently enables improvement of flexibility of arrangement layout of other devices disposed in the engine room.SOLUTION: An electric device cooling structure 1 of a vehicle according to the invention includes: a heat exchanger 5 disposed at the rear side of an outer air intake opening 41 of a front bumper face 4; and an electric device 3 disposed in an engine room 2 and having heat radiation fins 3b. The electric device 3 is disposed at a position located at the outer side of a front side frame 8 in a vehicle width direction and at the lateral side of the heat exchanger 5. The heat radiation fins 3b are oriented to the vehicle rear side.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an electric equipment cooling structure for a vehicle that cools electric equipment in an engine room using outside air (for example, traveling wind).

  In recent years, electric devices such as converters tend to be installed in the engine room of a vehicle for the purpose of an increase in vehicle equipment and power management for energy saving. Such an electric device needs to be cooled, but is cooled by using traveling wind introduced from the outside air intake opening of the front bumper face because of the ease of the cooling method.

  When the electric device is cooled as described above, heat radiating fins are provided on the heat radiating surface of the electric device. The direction of the radiating fins is directed to the upstream side of the traveling wind flowing in the engine room in order to increase the cooling efficiency (Patent Document 1).

JP 2017-91757 A

  However, in recent years, due to the need for improvement in engine cooling performance and body aerodynamic performance, traveling wind tends to be taken into the engine room from the outside air intake opening of the front bumper face via the heat exchanger. On the other hand, for vehicles with a relatively small front and rear length of the engine room due to needs such as the design of the vehicle, the heat dissipation of the above electric equipment is ensured while ensuring the degree of freedom of layout of other equipment installed in the engine room. It is necessary to cool the fins effectively with running wind.

  Therefore, the present invention effectively cools the electric device arranged in the engine room with the traveling wind taken into the engine room through the heat exchanger from the outside air intake opening of the front bumper face. An object of the present invention is to provide a vehicular electric equipment cooling structure capable of improving the degree of freedom of arrangement and layout of other equipment arranged in a room.

  The present invention includes a heat exchanger disposed on the rear side of the outside air intake opening portion of the front bumper face, and an electric device disposed in the engine room and having heat radiation fins, the electric device including a front side It is arranged on the vehicle width direction outside of the frame and on the side of the heat exchanger, and the heat dissipating fin is an electric equipment cooling structure of the vehicle directed toward the vehicle rear side.

  According to this configuration, it is effective to use traveling wind that is taken into the engine room through the heat exchanger from the outside air intake opening of the front bumper face and flows in the vehicle width direction on the rear side of the heat exchanger. In addition, the heat dissipating fins of the electric equipment can be cooled.

  In addition, since the electric device is arranged on the outer side in the vehicle width direction than the front side frame and on the side of the heat exchanger, it is easy to secure the arrangement space for other devices arranged in the engine room. As a result, the degree of freedom of layout in the engine room can be improved.

As an aspect of the present invention, a seal member may be provided that guides the traveling wind flowing in from the outside air intake opening to the heat exchanger.
According to this structure, it can suppress that the driving | running | working wind which flowed in from the opening part for external air intake is taken in in an engine room without passing through a heat exchanger. As a result, it is possible to sufficiently secure the traveling wind flowing through the electric device, and to improve the cooling performance for cooling the electric device.

As an aspect of the present invention, a splash shield that extends downward from the front side frame and covers the inside of the front wheel is provided, and the front-rear position of the front end portion of the radiating fin is adjacent to the front-rear position of the front end portion of the splash shield. You may do it.
According to this configuration, the splash shield can effectively guide the traveling wind flowing in the vehicle width direction on the rear side of the heat exchanger to the heat radiating fins, thereby improving the cooling performance for cooling the heat radiating fins. it can.

As an aspect of the present invention, a mudguard that constitutes a front wheel house may be provided, and a front end portion of the radiating fin may be adjacent to a vehicle front side of a front end portion of the mudguard.
According to this configuration, the traveling wind that flows in the vehicle width direction on the rear side of the heat exchanger and flows on the front side of the mudguard can be effectively guided to the radiation fins, and the cooling performance for cooling the radiation fins is improved. Can do.

  As an aspect of the present invention, a splash shield that extends downward from the front side frame and covers the inside of the front wheel, and a vehicle front side that extends downward from the front side frame and is spaced from the splash shield. And a front and rear position of the front end portion of the radiating fin is disposed between the splash shield and the suspension cross mounting portion when viewed from the vehicle width direction. Good.

  According to this configuration, the traveling wind that flows in the vehicle width direction on the rear side of the heat exchanger and passes between the splash shield and the suspension cross mounting portion can be effectively guided to the radiating fin, and the radiating fin is cooled. Cooling performance can be improved.

As an aspect of the present invention, the radiating fins may be arranged in a vertical posture.
According to this configuration, it is possible to effectively cool the radiating fins by using the traveling wind flowing from the lower side to the upper side of the radiating fins.

As an aspect of the present invention, the heat dissipating fins may be arranged above the open bottom surface of the engine room at a predetermined interval.
According to this configuration, the traveling wind can be effectively submerged under the vertically radiating fin, and the traveling wind can be effectively flowed from the lower side to the upper side of the radiating fin.

As an aspect of the present invention, the radiating fins may be arranged in a horizontal posture.
According to this configuration, the traveling wind whose direction has been changed in the vehicle width direction on the rear side of the heat exchanger can be allowed to flow through the radiation fins in that direction. That is, since the traveling wind can flow through the radiating fin without disturbing the flow of the traveling wind, the radiating fin can be effectively cooled by the traveling wind.

As an aspect of the present invention, the electric device may be a DC / DC converter that transforms the voltage of the in-vehicle battery.
According to this configuration, the above-described effect can be obtained with respect to a DC / DC converter that easily generates heat.

  According to the present invention, the electric device arranged in the engine room is effectively cooled by the traveling wind taken into the engine room through the heat exchanger from the outside air intake opening of the front bumper face, and the engine Provided is a vehicular electric equipment cooling structure capable of improving the degree of freedom of arrangement and layout of other equipment arranged in a room.

The schematic plan view which looked at the engine room from the top. The side view which looked at the side of the front wheel house from the inside of an engine room. (A) is the top view which looked at the electric equipment with a radiation fin from the top, (b) is the rear view which looked at the electric equipment with a radiation fin from the back side. The rear view which looked at the electric equipment with a heat exchanger and a radiation fin from the back side. The top view explaining the flow of outside air. It is a figure which shows the modification of arrangement | positioning of the electric equipment with a radiation fin, (a) is the side view which looked at the side of the fin with a radiator from the engine inside, (b) looked at the fin with a radiator from the upper side Plan view.

An embodiment of the present invention will be described below with reference to the drawings.
<Embodiment>
With reference to FIGS. 1-5, the electric equipment cooling structure 1 of the vehicle which concerns on embodiment of this invention is demonstrated. "Front", "Rear", "Left", "Right", "Upper", and "Lower" indicated by arrows in FIG. 1 etc. are the front side, rear side, and left side of the vehicle K to which the vehicle electrical device cooling structure 1 is applied, respectively. , Right side, upper side and lower side.

  As shown in FIG. 1, an electric device cooling structure 1 for a vehicle is applied to a vehicle K such as an automobile, and an electric device 3 disposed in an engine room 2 of the vehicle K is connected to the outside air of a front bumper face 4 of the vehicle K. Cooling is effectively carried out by the traveling wind introduced into the engine room 2 from the intake opening 41 via the heat exchanger 5.

  The vehicle K includes an engine EG disposed in the engine room 2, a pair of left and right front side frames 8 disposed on both sides of the engine EG in the vehicle width direction, and a bumper beam 9 disposed on the front side of the front side frame 8. The front bumper face 4 disposed on the front side of the bumper beam 9, the heat exchanger 5 disposed on the rear side of the bumper beam 9, the front wheel house 10 in which the front wheels are accommodated, and the suspension arm of the vehicle K are supported. A suspension cloth 11 and an electric device 3 disposed in the engine room 2 are provided. In FIG. 1, the right front side frame 8 and the right front wheel house 10 are not shown for convenience of drawing.

  The pair of front side frames 8 are long reinforcing members having, for example, a rectangular closed cross-sectional shape, and are disposed on both sides in the vehicle width direction in the engine room 2 and extend in the vehicle front-rear direction. A crash box 13 is provided at the front ends of the pair of front side frames 8, and the bumper beam 9 is fixed via the crash box 13. When a collision load acts on the vehicle K from the front side of the vehicle, the crash box 13 is crushed by the collision load, and the collision load is absorbed by the crushing.

  The bumper beam 9 is a long reinforcing member whose cross-sectional shape is, for example, a forward projecting hat shape and extends in the vehicle width direction, and is disposed inside the front bumper face 4. The bumper beam 9 is provided across the front end portions of the crash boxes 13 on both the left and right sides.

  The front bumper face 4 is an exterior member that covers the front portion of the vehicle K. An opening 41 for taking in outside air for taking outside air (running wind) into the engine room 2 is provided at the center of the front bumper face 4 in the vehicle width direction.

  The heat exchanger 5 is, for example, a radiator, and circulates engine cooling water with the engine EG, and heat-exchanges the circulated engine cooling water with outside air (that is, traveling wind). It is to be cooled. The heat exchanger 5 has, for example, a rectangular plate shape when viewed from the front, and a blower 6 for efficiently passing outside air from the front side to the rear side of the heat exchanger 5 is provided on the rear surface thereof.

  The size of the front surface of the heat exchanger 5 is, for example, the same size or larger than the size of the opening surface of the outside air intake opening 41 of the front bumper face 4. The heat exchanger 5 is disposed behind the outside air intake opening 41 and is disposed in a vertical state with the front surface of the heat exchanger 5 facing the front of the vehicle. More specifically, the heat exchanger 5 is disposed just behind the bumper beam 9 and between the left and right crash boxes 13.

  Further, outside of the heat exchanger 5, the outside air taken in from the outside air intake opening 41 is located on the vehicle front side of the heat exchanger 5 (that is, between the heat exchanger 5 and the outside air intake opening 41). A seal member 15 that suppresses the flow is provided (see FIG. 5). By providing the seal member 15 in this manner, in the vehicle K, almost all of the outside air taken in from the outside air intake opening 41 is introduced into the engine room 2 via the heat exchanger 5 (full ducting). ).

  An engine EG is arranged on the vehicle rear side of the heat exchanger 5 with a certain interval. Thereby, after passing through the heat exchanger 5, the outside air is difficult to flow further to the vehicle rear side because of the engine EG. (See FIG. 5).

  The seal member 15 has a frame shape that surrounds the periphery of the front surface of the heat exchanger 5 and has a thickness (front and back length) that fills the space between the periphery of the front surface of the heat exchanger 5 and the back surface of the front bumper face 4. Has been. The seal member 15 includes, for example, a left side portion 15L that closes the left side gap, a right side portion 15R that closes the right side gap, and a lower side of the gap between the front peripheral edge of the heat exchanger 5 and the front bumper face 4. The lower side portion 15D that closes the gap is integrally formed in a substantially concave shape. The seal member 15 may be formed in a substantially round shape with an upper side portion that closes the upper gap.

  The left side portion 15L of the seal member 15 is formed in, for example, a vertically long plate shape having the same vertical length as the left side of the front surface of the heat exchanger 5, and one of the pair of long sides is the front surface of the heat exchanger 5. Is arranged so that the other of the pair of long sides is adjacent to the left side portion of the outer periphery of the outside air intake opening 41 on the back surface of the front bumper face 4. The right side 15R of the seal member 15 is formed so as to be symmetrical with the left side 15L. The lower side portion 15D of the seal member 15 is formed in a horizontally long plate shape having a length in the left-right direction that is approximately the same as the lower side of the front surface of the heat exchanger 5, for example, and one of the pair of long sides is the heat exchanger 5 Adjacent to the lower edge of the front surface, the other of the pair of long sides is disposed so as to be adjacent to the lower portion of the outer periphery of the outside air intake opening 41 on the back surface of the front bumper face 4.

  For example, the front edge of the seal member 15 is fixed to the outer periphery of the outside air intake opening 41 on the back surface of the front bumper face 4, and the rear edge is fixed to the periphery of the front surface of the heat exchanger 5. Thus, it is fixed between the front bumper face 4 and the heat exchanger 5.

As shown in FIGS. 1 and 2, the front wheel house 10 includes a mud guard 18 and a splash shield 19.
The mud guard 18 is formed in an arch shape (arc shape) along the vehicle front-rear direction so as to cover substantially the upper half of the front wheel, and the width of the mud guard 18 in the vehicle width direction is such that the front wheel can be steered. It is formed larger than the direction width. The mudguard 18 is disposed at a position where the front wheel is disposed. More specifically, the mud guard 18 is disposed adjacent to the outside of the front side frame 8 in the vehicle width direction, and is disposed at a position spaced apart from the heat exchanger 5 on the vehicle rear side.

  As shown in FIG. 2, the mud guard 18 is disposed so that the substantially central portion of the vertical width thereof is substantially the same height as the front side frame 8 when viewed from the vehicle width direction. In this state, the upper portion of the mud guard 18 projects upward from the front side frame 8, and the lower half of the mud guard 18 projects downward from the front side frame 8.

  As shown in FIGS. 1 and 2, the splash shield 19 covers the inner side of the front wheel in the vehicle width direction, and is a substantially rectangular plate-like planar member, for example. The splash shield 19 is arranged to extend downward from the front side frame 8 so as to cover the front half side portion of the open side surface of the mud guard 18 on the inner side in the vehicle width direction. The front-rear direction position of the front end portion of the splash shield 19 is disposed at substantially the same position as the front-rear direction position of the front end portion of the mud guard 18 (see FIG. 1).

  As shown in FIG. 1, the suspension cross 11 supports the lower arm of the front suspension that supports the front wheels, and is, for example, a substantially planar member that is substantially X-shaped in plan view. The suspension cross 11 is disposed on the open bottom surface of the engine room 2 and is provided across the front wheel house 10 on both the left and right sides. The right front end portion and the left front end portion of the suspension cross 11 are respectively disposed directly below the front end portions of the left and right front side frames 8, and are connected to the lower surface of the front end portion of the front side frame 8 via the suspension cross attachment portion 22. (See FIG. 2).

  As shown in FIG. 2, the suspension cross attachment portion 22 is a member for attaching the suspension cross 11 to the front side frame 8 as described above, and is, for example, a vertically long member having a closed cross-sectional shape and a prism shape. The suspension cross attachment portion 22 is arranged as a vertical body directly under the front end portion of the front side frame 8, and the upper end of the suspension cross attachment portion 22 is connected to the lower surface of the front side frame 8, and the lower end of the suspension cross attachment portion 22 is The suspension cross 11 is connected to the right front end portion or the left front end portion.

  The suspension cross attachment part 22 is arrange | positioned rather than the heat exchanger 5 at the vehicle rear side (refer FIG. 1). Further, as shown in FIG. 2, the suspension cross attachment portion 22 is disposed at a position spaced from the front end portion of the splash shield 19 toward the front side of the vehicle by a predetermined interval. In other words, due to the distance between the suspension cross mounting portion 22 and the splash shield 19, the outside air that has been turned in the vehicle width direction on the rear side of the heat exchanger 5 flows across the front side frame 8 to the front side of the mud guard 18. A passage is secured.

  As shown in FIGS. 1 and 3, the electrical device 3 is an electrical device provided with heat radiation fins 3 b, and is, for example, a transformer (that is, a DC / DC converter) that transforms (for example, boosts) the output voltage of the in-vehicle battery. is there. The output voltage of the in-vehicle battery is boosted by the electric device 3 that is a transformer, and is supplied to other electric devices in the vehicle, thereby suppressing power loss during power supply.

  The electric device 3 includes an electric device main body 3a and a plurality of heat radiation fins 3b for cooling the electric device main body 3a. Each radiating fin 3b is formed in a rectangular plate shape, for example. The heat radiating fins 3b are erected on the rear surface of the housing of the electric device main body 3a, and are arranged side by side in the vehicle width direction at intervals (that is, the heat radiating fins 3b are arranged in a vertical posture. ), Outside air flows in the vertical direction between the heat radiation fins 3b.

  The electric device 3 is disposed in one (for example, the left side) space of the left and right corner spaces at the front of the engine room 2. More specifically, the electric device 3 is disposed on the outer side in the vehicle width direction than the front side frame 8 and on the side of the heat exchanger 5 (more specifically, on the side of the blower 6). The heat dissipating fins 3b of the electric equipment 3 are arranged on the vehicle rear side with respect to the heat exchanger 5 with their tip portions directed toward the vehicle rear side. Thereby, it becomes possible to cool the radiating fins 3b using the outside air whose direction is changed in the vehicle width direction on the rear side of the heat exchanger 5.

  As shown in FIGS. 1 and 2, the front-rear direction position of the tip end portion (that is, the end portion on the rear side of the vehicle) 3ba of the radiating fin 3b is between the splash shield 19 and the suspension cross mounting portion 22 when viewed from the vehicle width direction. Is arranged. More specifically, the front-rear direction position of the front end portion 3ba of the radiating fin 3b is adjacent to the front end portion 19a of the splash shield 19 when viewed from the vehicle width direction. That is, the front end portion 3ba of the radiating fin 3b is adjacent to the front end portion 18a of the mudguard 18. In this state, for example, substantially the entire width in the front-rear direction of the heat radiating fin 3 b protrudes between the splash shield 19 and the suspension cross mounting portion 22 when viewed from the vehicle width direction.

  By overhanging in this way, almost the entire radiating fin 3b is easily exposed to the outside air whose direction is changed in the vehicle width direction on the rear side of the heat exchanger 5, and the radiating performance of the radiating fin 3b is improved. In particular, since the front end portion 3ba of the radiating fin 3b is adjacent to the front end portion 18a of the mud guard 18, all the outside air that has passed between the splash shield 19 and the suspension cross mounting portion 22 is allowed to sink under the radiating fin 3b. This can contribute to the cooling of the radiation fins 3b. In addition, in order to cool the radiation fin 3b with outside air, it is necessary to flow outside air from the lower side to the upper side of the radiation fin 3b.

  Further, as shown in FIG. 2, the electric device 3 (that is, the heat radiation fin 3 b) is disposed on the upper side of the engine room 2 that is spaced apart from the open bottom surface S. As a result, the outside air whose direction has been changed in the vehicle width direction is likely to dive below the radiation fins 3b and flow from the lower side to the upper side of the radiation fins 3b.

  More specifically, as shown in FIG. 4, the electric device 3 is arranged at substantially the same height as the height position of the front side frame 8 (more specifically, for example, a height slightly lower than the front side frame 8). ing. In this state, for example, the upper surface of the electric device 3 is disposed at a position slightly lower than the upper surface of the front side frame 8, and the lower portion of the electric device 3 and the lower portion of the radiating fin 3 b protrude downward from the lower surface of the front side frame 8. Yes.

  The electric device 3 is fixed to the front side frame 8. More specifically, a fixing bracket 24 (see FIG. 1) is provided on the front side frame 8, and is fixed to the front side frame 8 via the fixing bracket 24.

Next, the flow of outside air (running wind) in the engine room 2 will be described.
As shown in FIG. 5, the outside air (running wind) G that has flowed into the outside air intake opening 41 of the front bumper face 4 is guided to the heat exchanger 5 by the seal member 15 and passes through the heat exchanger 5. It flows into the engine room 2. That is, the outside air Ga which is about to flow into the engine room 2 from between the periphery of the outside air intake opening 41 and the periphery of the front surface of the heat exchanger (that is, not via the heat exchanger 5) It is interrupted by. As a result, almost all the outside air G flowing in from the outside air intake opening 41 passes through the heat exchanger 5 and flows into the engine room 2.

  The outside air G that has passed through the heat exchanger 5 has an engine EG on the rear side of the heat exchanger 5 and is difficult to flow straight as it is. As shown in FIG. 2, for example, a part of the outside air G that has turned in the left direction flows to the lower side of the front side frame 8, passes between the splash shield 19 and the suspension cross mounting portion 22, and 3 sinks to the lower side of the radiating fin 3b. And it passes between the radiation fins 3b toward the upper side from the lower side of the radiation fins 3b. By this passage, the radiation fins 3b are effectively cooled by the outside air G. Then, the outside air G that has passed between the heat radiation fins 3 b flows toward the rear of the vehicle along the arch-shaped outer peripheral surface of the mud guard 18.

  As described above, according to the electric equipment cooling structure 1 for a vehicle according to this embodiment, the heat exchanger 5 disposed on the rear side of the outside air intake opening 41 of the front bumper face 4 and the engine room 2 are disposed. And the electric device 3 having the heat radiation fins 3b, the electric device 3 being disposed outside the front side frame 8 in the vehicle width direction and on the side of the heat exchanger 5, and the heat radiation fins 3b Is directed to.

  According to this configuration, the traveling wind that is taken into the engine room 2 from the outside air intake opening 41 of the front bumper face 4 through the heat exchanger 5 and flows in the vehicle width direction on the rear side of the heat exchanger 5. The heat radiation fins 3b of the electric equipment 3 can be effectively cooled by using.

  In addition, since the electric device 3 is disposed on the outer side in the vehicle width direction than the front side frame 8 and on the side of the heat exchanger 5, it is easy to secure a space for arranging other devices disposed in the engine room 2. As a result, the degree of freedom of layout in the engine room 2 can be improved.

  Further, since the seal member 15 that guides the traveling wind flowing in from the outside air intake opening 41 to the heat exchanger 5 is provided, the traveling wind flowing in from the outside air intake opening 41 passes through the heat exchanger 5. Without being taken into the engine room 2 without being lost. Thereby, the traveling wind flowing through the electric device 3 can be sufficiently secured, and the cooling performance for cooling the electric device 3 can be improved.

  Further, a splash shield 19 extending downward from the front side frame 8 and covering the inner side of the front wheel is provided, and the front / rear position of the front end portion 3ba of the radiating fin 3b is adjacent to the front / rear position of the front end portion 19a of the splash shield 19. Therefore, the splash shield 19 can effectively guide the traveling wind flowing in the vehicle width direction on the rear side of the heat exchanger 5 to the radiation fins 3b, thereby improving the cooling performance for cooling the radiation fins 3b. be able to.

  Moreover, since the front end portion 3ba of the radiating fin 3b is adjacent to the front side of the vehicle of the front end portion 18a of the mud guard 18, the vehicle width on the rear side of the heat exchanger 5 is provided. The traveling wind flowing in the direction and flowing on the front side of the mudguard 18 can be effectively guided to the radiation fins 3b, and the cooling performance for cooling the radiation fins 3b can be improved.

  A splash shield 19 that extends downward from the front side frame 8 and covers the inner side of the front wheel, and extends downward from the front side frame 8 and is disposed on the front side of the vehicle at a distance from the splash shield 19. And the suspension cross attachment portion 22 to which the suspension cross 11 is attached, and the front and rear positions of the front end portions 3ba of the radiating fins 3b are disposed between the splash shield 19 and the suspension cross attachment portion 22 when viewed from the vehicle width direction. The traveling wind that flows in the vehicle width direction on the rear side of the heat exchanger 5 and passes between the splash shield 19 and the suspension cross mounting portion 22 can be effectively guided to the radiation fins 3b, and the radiation fins 3b are cooled. Cooling performance can be improved.

  Moreover, since the radiation fin 3b is arrange | positioned with a vertical attitude | position, the radiation fin 3b can be cooled effectively using the traveling wind which flows toward the upper side from the lower side of the radiation fin 3b.

  Further, since the heat radiating fins 3b are arranged above the open bottom surface S of the engine room 2 at a predetermined interval, the running wind can be effectively submerged under the heat radiating fins 3b in the vertical posture, The wind can be effectively flowed from the lower side to the upper side of the radiating fin 3b.

  Moreover, since the electric equipment 3 is a DC / DC converter that transforms the voltage of the on-vehicle battery, the above effect can be obtained with respect to the DC / DC converter that easily generates heat.

<Modification>
In the above embodiment, as shown in FIGS. 1 and 2, the radiating fins 3 b are arranged side by side in the vehicle width direction at intervals (that is, arranged in a vertical posture). ) As shown in (b), they may be arranged side by side in the vertical direction (that is, they may be arranged in a horizontal posture).

  In this case, the outside air G flows between the radiation fins 3b along the vehicle width direction. For this reason, it is desirable that all of the radiating fins 3 b be disposed below the lower surface of the front side frame 8 and be disposed between the splash shield 19 and the suspension cross attachment portion 22. Thereby, the outside air G flows through all between the radiation fins 3b, and all the radiation fins 3b can be effectively cooled.

  Further, in this case, the traveling wind G whose direction has been changed in the vehicle width direction on the rear side of the heat exchanger 5 can be allowed to flow through the radiating fins 3b in that direction. That is, since the traveling wind G can flow through the radiation fins 3b without disturbing the flow of the traveling wind G, the radiation fins 3b can be effectively cooled by the traveling wind G.

  The present invention is not limited only to the configuration of the above-described embodiment and modification examples, and includes a combination of the above-described embodiment and modification examples, and many embodiments can be obtained.

  The present invention is optimal for industrial application related to a vehicle electrical equipment cooling structure for cooling electrical equipment in an engine room using outside air (for example, traveling wind).

DESCRIPTION OF SYMBOLS 1 ... Electric equipment cooling structure of vehicle 2 ... Engine room 3 ... Electric equipment 3b ... Radiation fin 4 ... Front bumper face 5 ... Heat exchanger 8 ... Front side frame 15 ... Seal member 18 ... Mud guard 19 ... Splash shield 22 ... Suspension attachment Part 41 ... Opening for taking in outside air S ... Open bottom of engine room G ... Outside air (running wind)

Claims (9)

A heat exchanger disposed on the rear side of the front air intake opening of the front bumper face;
It is arranged in the engine room, and includes an electrical device having heat radiation fins,
The electrical device is disposed outside the front side frame in the vehicle width direction and on the side of the heat exchanger,
The heat dissipating fin is an electric equipment cooling structure for a vehicle directed toward the rear side of the vehicle. The electric device cooling structure for a vehicle according to claim 1, further comprising a seal member that guides the traveling air flowing in from the outside air intake opening to the heat exchanger. A splash shield that extends downward from the front side frame and covers the inside of the front wheel,
The electric equipment cooling structure for a vehicle according to claim 1, wherein a front-rear position of a front end portion of the radiation fin is adjacent to a front-rear position of a front end portion of the splash shield. It has a mudguard that makes up the front wheel house,
4. The electric device cooling structure for a vehicle according to claim 1, wherein a front end portion of the heat dissipating fin is adjacent to a vehicle front side of a front end portion of the mud guard. 5. A splash shield that extends downward from the front side frame and covers the inside of the front wheel;
A suspension cross mounting portion that extends downward from the front side frame and is disposed on the front side of the vehicle at a distance from the splash shield, to which a suspension cloth is attached.
5. The vehicle according to claim 1, wherein the front and rear positions of the front end portions of the heat dissipating fins are disposed between the splash shield and the suspension cross mounting portion when viewed from the vehicle width direction. Electric equipment cooling structure. The electric equipment cooling structure for a vehicle according to claim 1, wherein the radiating fins are arranged in a vertical posture. The electric equipment cooling structure for a vehicle according to claim 6, wherein the heat dissipating fins are arranged above the open bottom surface of the engine room at a predetermined interval. The electric equipment cooling structure for a vehicle according to claim 1, wherein the radiating fins are arranged in a horizontal posture. The vehicle electrical device cooling structure according to claim 1, wherein the electrical device is a DC / DC converter that transforms a voltage of a vehicle-mounted battery.

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