JP2015009588A - Cooling device for electrical component pack - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cooling device for an electrical component pack which can prevent occurrence of an electric leakage, a corrosion and so on of a high voltage component in an electrical component pack for the reason such that a liquid or the like, which enters in an inlet directed to the interior of a cabin flows in the pack.SOLUTION: A cooling device for an electrical component pack includes a duct 53 in which air in a cabin is sucked through an intake opening 54, sucked air is flown towards downstream side along a suction passage r1 as cooling air and is fed in an electrical component pack which is provided at a position lower than the intake opening 54. In the cooling device, an opening side bottom wall part, which spans from a low wall 631 of an intake opening p1 to a low wall 632 at an uppermost position p2 higher than the low wall 631 in a low wall 63 of the suction passage r1 of the duct 53, is formed in stairs for going-up.

Description

  The present invention relates to a cooling device for an electrical component pack that supplies vehicle interior air as cooling air into an electrical component pack mounted on a vehicle and air-cools an internal heat generation source.

A vehicle, particularly an electric vehicle (EV) or a plug-in hybrid vehicle (PHEV) accommodates a battery (electric storage unit), an electrical device of an electric power circuit (electric device including an inverter), etc. in an electric component pack. It is mounted in a storage space provided on the side. In such an electric vehicle or the like, the electric motor receives electric power from the battery (power storage unit) to generate rotational energy, thereby driving the vehicle to travel or assisting driving, or the electric motor converts the kinetic energy during deceleration. The electric energy is converted into electric energy in cooperation with the regenerative circuit, and the electric energy is charged by a battery (storage unit).
Such a battery (power storage unit) and a high-voltage component that is an electrical component of the power supply circuit become a heating element during traveling while being housed in the electrical component pack. For this reason, the air in the passenger compartment is sucked by the electric fan and flows around the high voltage component that becomes the heating element in the electric component pack, thereby suppressing the temperature rise of the high voltage component.

For example, a cooling device for an electrical component pack has an intake duct connected to the suction port side of the electrical component pack and an exhaust duct connected to the exhaust port side. An electric fan is installed in the middle of the exhaust duct, which sucks in-vehicle air through the intake duct, causes cooling air to flow into the interior of the electrical component pack to cool high-voltage components, and exhausts the exhaust duct into the vehicle and outside the vehicle. doing.
Here, the air intake duct is provided with an air inlet in the vehicle interior, and the air in the vehicle taken in from the air inlet is guided into the electrical component pack as cooling air. Here, the intake port is shaped to open toward the vehicle interior space while avoiding interference with the interior parts so as to reduce the intake resistance. For this reason, when a passenger spills liquid or foreign matter such as drinks, liquid or the like enters the air inlet, enters the electrical component pack from the air intake duct, adheres to the high-voltage components, and leaks. The durability will be reduced due to corrosion.

  In order to cope with this, Patent Document 1 discloses that the bottom wall of the intake passage in the intake port of the intake duct is formed as an inclined wall with an upward slope on the downstream side, and liquid that has entered from the intake port. However, it prevents entry into the electrical component pack from the intake duct.

Japanese Patent No. 5131182

  However, as in Patent Document 1, even if the bottom wall in the intake port is formed as an upwardly inclined wall, if the falling speed of the liquid or the like is high, the liquid or the like moves downstream on the inclined wall that is an uphill slope. May move from the bottom to the top. In such a case, liquid and foreign matter enter the electrical component pack from the intake duct, leading to leakage of high voltage components, corrosion, and the like.

  The present invention has been made on the basis of the above-described problems. The object of the present invention is to allow liquid or the like that has entered a suction port facing the vehicle interior to flow into the electrical component pack, so that the high-voltage components in the pack are An object of the present invention is to provide a cooling device for an electrical component pack that can prevent the occurrence of leakage or corrosion.

  The invention of claim 1 of the present application is mounted on a vehicle and accommodates an electrical component pack, and air in the vehicle is sucked from an intake opening, and the intake air flows as a cooling air along an intake passage, An electrical component pack cooling device comprising a duct for supplying to the electrical component pack disposed at a position lower than an intake opening, wherein the bottom surface of the intake passage is inclined so that the upper side approaches the intake opening In addition, a downward surface facing the lower side or a vertical wall surface standing vertically is formed.

  According to a second aspect of the present invention, in the cooling device for an electrical component pack according to the first aspect, a plurality of the downward surfaces or the vertical wall surfaces are formed on the bottom surface of the intake passage, and the plurality of the downward surfaces or the vertical wall surfaces are formed. And a plurality of step portions are formed by the upward surface facing the upper side provided between the plurality of downward surfaces or vertical wall surfaces.

  According to a third aspect of the present invention, in the electrical component pack cooling device according to the second aspect, the plurality of step portions are formed so as to rise upward in a direction away from the intake opening. Features.

  According to a fourth aspect of the present invention, in the cooling device for an electrical component pack according to any one of the first to third aspects, the intake opening is disposed so as to open toward the interior of the vehicle. It is characterized by.

  In the first aspect of the present invention, a bottom surface facing the lower side or a vertical wall surface standing vertically is formed on the bottom surface of the intake passage so as to be inclined so that the upper side approaches the intake opening. For this reason, the liquid or dust heading downstream along the air intake passage from the air intake opening abuts on the downward surface or the vertical wall surface and falls to the bottom surface of the air intake passage due to its own weight and is prevented from moving toward the air intake passage downstream due to its momentum. In this way, liquid and dust are excluded from the intake air going downstream of the intake passage and flow to the downstream electrical component pack is prevented, so that leakage of high voltage components in the electrical component pack, corrosion, etc. Generation | occurrence | production can be prevented and the durable fall of an electrical component pack can be prevented reliably.

  In the invention of claim 2, a plurality of downward surfaces or the vertical wall surfaces are formed, and an upward surface facing the upper side is provided therebetween to form a plurality of step portions. For this reason, the liquid or dust that goes downstream along with the intake air comes into contact with a plurality of downward surfaces or vertical wall surfaces of the stepped portion and falls to the bottom surface of the intake passage due to its own weight, so that it is prevented from going downstream of the intake passage. In this way, liquid and dust are excluded from the intake air going downstream of the intake passage and flow to the downstream electrical component pack is prevented, so that leakage of high voltage components in the electrical component pack, corrosion, etc. Generation | occurrence | production can be prevented and the durable fall of an electrical component pack can be prevented reliably.

  According to the third aspect of the present invention, since the plurality of stepped portions rises in the direction away from the intake opening, the liquid reliably flows downstream from the intake opening to the uppermost low wall at the uppermost position of the upward step. The dust comes into contact with a plurality of downward surfaces or vertical wall surfaces of the step portion a plurality of times. By this multiple times of contact, liquid and dust traveling downstream of the intake passage can be reliably removed, and liquid and dust can be prevented from traveling downstream of the intake passage.

  According to the invention of claim 4, since the intake opening of the intake duct opens toward the interior of the vehicle, the air inside the vehicle is sucked from a region that does not interfere with the interior parts, for example, the clearance between the left and right end portions of the seat that does not overlap with the passenger. Inhalation without resistance ensures a sufficient amount of cooling air.

It is the schematic of the vehicle carrying the cooling device of the electrical component pack of this invention. It is a principal part schematic plan view of the vehicle of FIG. FIG. 2 is a cutaway perspective view of a main part around a rear floor of the vehicle in FIG. 1. It is a side view of the electrical component pack of the vehicle of FIG. It is a rear upper perspective view of the electric component pack of the vehicle of FIG. It is a notch perspective view of the rear seat of the vehicle of FIG. It is a function explanatory view of the air intake opening of the duct used in the cooling device for the electrical component pack of FIG. 1, (a) is a side cross-sectional explanatory view, (b) is a front explanatory view. It is a function explanatory view of the air intake opening of the duct used in the cooling device for the electrical component pack of another embodiment of the present invention, (a) is a side cross-sectional explanatory view, (b) is a front explanatory view. It is a function explanatory view of the air intake opening of the duct used in the cooling device for the electrical component pack of another embodiment of the present invention, (a) is a side cross-sectional explanatory view, (b) is a front explanatory view. It is a function explanatory view of the air intake opening of the duct used in the cooling device for the electrical component pack of another embodiment of the present invention, (a) is a side cross-sectional explanatory view, (b) is a front explanatory view.

Hereinafter, a cooling device for an electrical component pack according to a first embodiment of the present invention will be described.
First, a hybrid vehicle (hereinafter simply referred to as a vehicle) C equipped with a cooling device 1 for an electrical component pack as a first embodiment of the present invention will be described with reference to FIG.
In the vehicle C, a front wheel drive device 2 including a front motor and an engine as a driving source for traveling is connected to the front wheel 3, and a rear wheel drive device 4 (see FIG. 2) including a rear motor (not shown) is connected to the rear wheel 5. These front and rear drive sources are appropriately selected and driven according to the driving mode of the vehicle, and the vehicle C travels.

As shown in FIG. 1, the vehicle C includes a front seat 6 and a rear seat 7 on a front floor 100. A rear wheel drive device 4 is disposed below the rear floor 101 behind the rear seat 7, and a recess 11 is formed at a position where it does not interfere with the rear wheel drive device 4. In the accommodation space 13 of the recess 11, a battery (power supply unit) 23, which is a high-voltage component, and an electrical component pack (power supply device container) 8 that houses the motor drive control device PU are mounted.
As shown in FIG. 2, the front end of the recess 11 of the rear floor 101 is connected to the front cross member 14, and the rear end is connected to the rear end cross member 15. The front cross member 14 and the rear end cross member 15 are integrally welded to the left and right side members 16, 16, and the upper portions of these members are overlapped with the rear floor 101 to be welded. The strength and rigidity of the recess 11 are ensured.

The electric component pack (power supply device container) 8 shown in FIG. 1 has a substantially hermetic container shape and is mounted in a state of being fitted in the housing space 13 of the recess 11. As shown in FIGS. 2 and 4, front and rear brackets 17 and 18 having a closed cross-section structure and strengthened strength and rigidity are respectively projected from the left and right side walls of the electrical component pack 8. 16 (see FIG. 2).
As shown in FIGS. 1 and 4, the electrical component pack 8 includes a deep dish-shaped lower container 21 and a lid-shaped upper container 22, and the upper and lower flanges fr (see FIG. 4) of the lower container 21 and the upper container 22 are mutually connected. A plurality of locations are fastened with bolts to form a storage chamber R therein.
A power supply unit (battery) 23, which is an electrical component, and a motor drive control device PU (see FIG. 1) are accommodated in the storage chamber R of the electrical component pack 8.

The power supply unit (battery) 23 is configured to accommodate and hold a plurality of battery modules including a plurality of batteries, and is fixed to the bottom wall of the lower container 21.
The motor drive control device PU is arranged on a power supply circuit connecting the power supply unit 23 and the front and rear electric motors (not shown), and controls the running electric energy. The motor drive control device PU is supplied to the electric motor according to the control command of the control means (not shown). The power control of the traveling power is performed. The motor drive control device PU includes a voltage device 27 including a power supply switching circuit and an inverter 24.
The inverter 24 forms a part of the power control unit, and receives a control command from a control means (not shown) to adjust the power supply current of the power supply unit 23 to three-phase alternating current by PWM control of the on / off time of the transistor. Output to a motor (not shown) to control the rotational speed of the motor.

The electric device 27 is disposed in front of the power supply unit 23 and includes a manual switch for interrupting a power supply circuit (not shown) by manual operation, an automatic interrupting device, a fuse for interrupting overcurrent, and wiring thereof.
These voltage devices are driven in the storage chamber R of the electrical component pack 8, and the power source unit 23 and the motor drive control device PU serve as heat sources during driving. At this time, the amount of heat generation increases as the driving state of the vehicle moves toward a higher output state, and the temperature of the storage chamber R increases. Therefore, in order to prevent excessive temperature rise, the electrical component pack 8 is cooled by the provision of the cooling device 50 for the electrical component pack to which the present invention is applied.

As shown in FIGS. 2 and 5, the electrical component pack 8 cooled by the cooling device 50 projects a suction pipe portion 51 that forms a suction port m 1 at one end of the upper container 22, and a discharge port m 2 at the other end of the upper container 22. The formed discharge pipe portion 52 is protruded and formed.
The suction pipe portion 51 is connected to the downstream end of the intake duct 53. The intake duct 53 sucks the air in the passenger compartment through the intake opening 54 and causes the intake air to flow downstream along the intake passage r1 as cooling air, so that the intake duct 53 is positioned lower than the intake opening 54 by the step d1 (see FIG. 4). To the electrical component pack 8 deployed.

As shown in FIG. 5, the upstream end of the exhaust duct 55 is connected to the discharge pipe portion 52, and the downstream end of the exhaust duct 55 opens in front of the rear vertical wall 111 (see FIG. 1) of the recess 11. The intake ducts 561 and 562 of the electric fan 56 are connected to the middle part of the exhaust duct 55.
As shown in FIGS. 2 and 5, from the suction path r 1 reaching the suction port m 1 of the electrical component pack 8 from the suction opening 54 of the suction duct 53, the circulation path r 2 of the storage chamber R, and the discharge port m 2 of the electrical component pack 8. An exhaust passage r3 reaching the downstream end of the exhaust duct 55 is formed in communication with each other. The cabin air is sucked by the electric fan 56 through the suction path r1, the circulation path r2, and the exhaust path r3, and is exhausted from the downstream end of the exhaust duct 55 to the inside and outside of the vehicle as cooling air. As a result, the cooling air passing through the electrical component pack 8 cools the heat generation source of the storage chamber R, and the durability of the power supply unit 23 and the motor drive control device PU inside the electrical component pack 8 is reduced due to an excessive temperature rise. Is preventing.

  The intake duct 53 and the exhaust duct 55 are formed in a curved cylindrical shape and are formed of synthetic resin, rubber, or the like. The intake duct 53 connects the intake opening 54 on the intake side and the intake pipe portion 51 of the electrical component pack 8 disposed at a position lower than the intake opening 54. The intake duct 53 is curved so as to absorb a shift in the relative positions of the intake opening 54 and the intake port m1 of the intake pipe portion 51 in the vertical direction Z, the front-rear direction X, and the left-right direction Y. Further, the exhaust duct 55 is curved so as to avoid interference with other parts between the discharge port m2 of the electrical component pack 8 and the downstream end of the exhaust duct 55 reaching the vehicle outside of the rear vertical wall 111 of the recess 11. Deployed.

Next, the configuration of the intake duct 53 that constitutes a main part of the present invention will be additionally described for each embodiment.
The intake duct 53 that forms the main part of the first embodiment of the present invention will be described.
As shown in FIGS. 2, 3, and 6, the air intake opening 54 of the air intake duct 53 is forwardly provided between the seat back 701 of the rear seat 7 and the indoor bulging wall 57 of the tire house that is a part of the vehicle interior wall. Is fitted in a seat opening 702 that forms an inclined opening, and is disposed so as to face the passenger compartment space e. Here, the intake opening 54 is a space e (region) between the front and rear seats 6, 7, and on the side of the tire house 57 that does not overlap with the occupant, the right end clearance of the seat that does not overlap with the occupant (the left end depending on the arrangement of the intake duct (It may be a gap). Thus, since it opens toward the direction which does not receive interference with the interior component of a vehicle, and a passenger | crew, since in-vehicle air is suck | inhaled without inhalation resistance, sufficient cooling air volume can be ensured.

  The intake opening 54 here is formed in a substantially rectangular opening in front view, and the upper part of the lower part recedes obliquely backward, whereby the intake opening 54 is formed in an opening facing diagonally upward. As shown in FIG. 6, the intake opening 54 is formed in the same manner as the inclination of the seat surface of the inclined seat back 701, thereby preventing a part of the tip of the intake opening 54 from protruding from the seat surface. 4 and 5, reference numeral 58 indicates a sealing material that fills a relative gap when the seat opening 702 and the front end of the intake opening 54 are fitted, and reference numerals 59 and 60 indicate the indoor expansion of the tire house. The upper and lower mounting brackets for fastening the intake opening 54 to the outlet wall 57 are shown.

As shown in FIG. 7, the opening-side upper wall portion 61 and the opening-side left and right side walls 62 are continuous from the opening portion P1 of the intake duct 53 and the opening position P1 at the tip of the intake opening toward the back side downstream of the suction passage r1. It is formed with a plane. On the other hand, an intake passage low wall 63 that connects both lower portions of the opening-side left and right side walls 62 and forms the bottom surface of the intake passage is integrally coupled. Further, the lateral width b1 (see FIG. 7B) of the suction passage r1 is formed to be constant.
Here, the intake opening 54 is disposed so that the opening-side upper wall portion 61 and the opening-side low wall 631 at the tip of the intake passage low wall 63 are opposed to each other while maintaining the vertical width h1 in the vertical direction Z. The opening-side low wall 631 of the intake path low wall 63 and the uppermost position p2 on the far side downstream of the intake path r1 are opposed to each other while maintaining the vertical width h3. Further, the opening-side upper wall portion 61 of the intake opening 54 and the uppermost position p2 are disposed facing each other while maintaining the vertical width h2.

Further, a vertical wall surface f1 is provided between the opening side low wall 631 of the intake path low wall 63 and the uppermost low wall 632 provided at the uppermost position p2 downstream of the intake path r1 and vertically. The vertical wall 633 is continuously formed. That is, the vertical wall 633 has a bottom edge on the bottom side that is bent from the deepest part (the right end side in FIG. 7A) of the opening-side low wall 63 of the intake passage, and a top edge that extends perpendicularly from the bottom edge. It is bent and continuously formed on the uppermost low wall 632. That is, in the intake duct 53, the opening side low wall 631, the vertical wall 633, and the uppermost low wall 632 form a stepped portion having a vertical width h3.
Thus, the intake duct 53 narrows the air a flowing into the intake opening 54 having the vertical width h1 into the suction passage r1 having the vertical width h2 narrowed by the height h3 of the vertical wall 633 at the position of the uppermost low wall 632. At that time, the inflowing air a comes into contact with the vertical wall surface f1 standing vertically of the vertical wall 633, and then flows into the suction path r1 having the vertical width h2 on the uppermost lower wall 632. Like to do. Thereby, the function of removing foreign substances such as moisture by the vertical wall surface f1 provided on the intake channel low wall 63 is ensured.

Here, it is assumed that the electric fan 56 of the cooling device 50 for the electric component pack is driven when the vehicle is driven.
At this time, as shown in FIG. 1, the intake opening 54, which is an inclined opening facing obliquely upward, sucks the air in the passenger compartment space e into the intake opening 54. As shown in FIG. 7 (a), the sucked air flow a is caused by the vertical air flow a in the substantially lower half of the vertical height h1 colliding with the vertical wall surface f1 that stands vertically with respect to the vertical wall 633. Scatter.
At this time, even when a foreign substance n such as water or juice or a liquid such as dust flows on the air flow a, the foreign substance n collides with the vertical wall surface f1 of the vertical wall 633 together with the liquid and scatters in the vertical direction. To do.

  The liquid and foreign matter n collide with the vertical wall, so that energy flowing to the back side downstream of the suction path r1 is eliminated, that is, the liquid and the foreign matter n are prevented from proceeding to the uppermost low wall 632 on the back side. For this reason, as shown in FIGS. 7A and 7B, the liquid or foreign matter n after the collision descends downward along the vertical wall surface f1 and reaches the lowermost opening-side low wall 631. Liquid etc. are removed outside the vehicle through the drain pipe 64 provided in the vehicle.

In this way, the intake duct 53 has the intake passage low wall 63 formed by the opening-side low wall 631, the vertical wall 633, and the uppermost low wall 632 to form a single stepped portion s0 having a vertical width h3. As a result, the liquid and dust traveling along with the intake path r1 from the intake opening 54 along with the intake air abut against the vertical wall surface f1 erected vertically with the vertical wall 633 and fall to the bottom surface of the intake path by its own weight, and downstream of the intake path Since it prevents the liquid and dust that flow toward it and flows to the downstream electrical component pack, it prevents leakage of high-voltage components in the electrical component pack, occurrence of corrosion, etc. It is possible to reliably prevent a decrease in durability.
In the cooling device 50 for the electrical component pack according to the first embodiment described above, the vertical wall 633 having the vertical wall surface f1 standing vertically on the intake passage low wall 63 of the intake duct 53 is provided, and is in contact with the vertical wall surface f1. The configuration is such that the foreign matter n such as the liquid in the air flow a is moved downward and removed.

Next, a cooling device 50a for an electrical component pack according to a second embodiment provided with an inclined wall 633a having a downward surface f2 instead of the vertical wall 633 will be described with reference to FIG.
The cooling device 50a for the electrical component pack according to the second embodiment includes an inclined wall 633a having a downward surface f2 instead of the step s0 of the intake passage low wall 63 used in the first embodiment using the vertical wall 633. It differs only in the point provided, and here, the same code | symbol is attached | subjected to the same member disclosed by 1st Embodiment, and duplication description is abbreviate | omitted.
As shown in FIG. 8, the intake-path low wall 63 of the intake duct 53 a is arranged so that the opening-side upper wall portion 61 and the opening-side low wall 631 face each other while maintaining a vertical width h1 in the vertical direction Z. The portion 61 and the uppermost low wall 632 are arranged opposite to each other while maintaining the vertical width h2. Further, the opening-side low wall 631 and the uppermost low wall 632 are arranged facing each other while maintaining the vertical width h3, and an inclined wall 633a is arranged between them.

Here, the step portion s0 ′ is located at the most downstream position of the opening-side low wall 631 of the intake duct 53a and the tip (most upstream side) of the uppermost low wall 632 provided at the uppermost position p2 on the inner side of the suction path r1. Are formed continuously by the inclined wall 633a. Here, the inclined wall 633a is formed with a downward surface f2 that is inclined so that the upper side approaches the intake opening 54 (closer to the left side in the drawing on the opening side) and faces the lower side.
That is, the inclined wall 633a is inclined so that the upper end edge approaches the intake opening 54 from the lower end edge at the most downstream position of the opening-side low wall 631, which is the bottom surface side of the intake passage r1, and is bent from the upper end edge. It is formed continuously at the tip of the upper low wall 632.

  As a result, the intake duct 53a flows the air a flowing into the intake opening 54 having the vertical width h1 into the suction passage r1 having the vertical width h2 narrowed by the height h3 of the vertical wall 633 at the position of the uppermost low wall 632. Let At that time, the inflowing air a comes into contact with the downward surface f2 of the inclined wall 633a, flows upward including a backflow component, and flows into the suction path r1 having the vertical width h2 on the uppermost low wall 632. To do. At this time, as shown in FIGS. 8A and 8B, the foreign matter n such as moisture in the air a can surely flow downward by colliding with the downward surface f2, and is downstream of the suction passage r1. The energy flowing to the back side is excluded, that is, it is prevented from proceeding to the uppermost low wall 632 which is the back side, reaches the lowermost opening side low wall 631, and passes through the drain pipe 64 provided in the same part to be liquid. Etc. are excluded outside the vehicle.

The cooling device 50 for the electrical component pack according to the first embodiment described above is formed by connecting a single vertical wall 633 between the opening-side low wall 631 and the uppermost low wall 632 to form a single step portion. Although the road low wall 63 is configured, it may be configured like the cooling device 50b of the electrical component pack of the third embodiment instead.
As shown in FIGS. 9 (a) and 9 (b), the cooling device 50b for the electrical component pack according to the third embodiment is different from the first embodiment in that the air intake duct 53b has a single intake path low wall 63. The only difference is that a staircase w1 having a plurality of vertical walls is formed instead of the vertical wall. For this reason, the same code | symbol is attached | subjected to the same member disclosed by 1st Embodiment here, and the duplication description is abbreviate | omitted.
As shown in FIGS. 9A and 9B, the intake duct 53b in the cooling device 50b for the electrical component pack according to the third embodiment has an opening-side upper wall portion 61 and an opening-side low wall 631 having a vertical width h1. The opening-side upper wall portion 61 and the uppermost lower wall 632 are opposed to each other while maintaining the vertical width h2. Further, the intake passage low wall 63 here has an opening side low wall 631 and an uppermost low wall 632 facing each other while maintaining a vertical width h3, and a step portion having a plurality of vertical wall portions 633b therebetween. A staircase w1 is formed. The staircase w1 here is formed so as to be an upward step in a direction away from the intake opening 54 (downstream direction of the intake passage r1).

Thus, between the most downstream position of the opening-side low wall 631 of the intake duct 53b and the tip (most upstream position) of the uppermost low wall 632 provided at the uppermost position p2 on the inner side of the suction path r1. A plurality of vertical wall surfaces f3 of the plurality of vertical wall portions 633b are formed on the bottom surface of the intake path low wall 63. Further, an upward surface f4 of the upper wall portion 634b facing upward is formed between the plurality of vertical wall surfaces f3 and the plurality of vertical wall surfaces f3, thereby forming a step w1 including a plurality of step portions.
Here, the height h3 of the staircase w1 is formed so that the opening height of the intake opening 54 is approximately half of h1, and is approximately the same as the passage height h2 of the suction passage r1 at the uppermost position p2. Thus, the function of reducing the inflow resistance, ensuring the air amount, and removing foreign matter by the opening-side low wall 631 described later is sufficiently ensured.

With the configuration shown in FIGS. 9A and 9B, the airflow a reaching the substantially lower half of the vertical height h1 collides with the vertical wall 633b of the staircase w1 composed of a plurality of steps. Spatter vertically and horizontally.
At this time, the foreign matter n such as liquid collides with the vertical wall portion 633b, thereby preventing the foreign matter n from proceeding to the lowermost wall 632 downstream of the suction path r1, that is, the rear side. For this reason, the liquid or foreign matter n after dropping on the staircase w1 reaches the tip end low wall 631 at the lowermost opening position P1, and the liquid or the like is removed outside the vehicle through the drain pipe 64 provided in the same portion. Reference numeral 65 denotes an upward bead portion, which prevents the foreign matter n such as liquid from flowing out of the opening.

Thus, in the case of the third embodiment as well, liquid and dust traveling downstream of the intake passage are excluded and flow to the downstream electrical component pack is prevented, so that the high-voltage components in the electrical component pack It is possible to prevent the occurrence of electric leakage, corrosion, etc., and reliably prevent the durability of the electrical component pack from being lowered.
The staircase w1 of the third embodiment includes the vertical wall portion 633b. However, instead of this, the inclined wall 633a as described in the second embodiment may be used. The same effect as the form can be obtained more reliably.

Next, a fourth embodiment of the present invention will be described with reference to FIG.
The fourth embodiment shown in FIG. 10 differs from the cooling device 50b of the electrical component pack of the third embodiment only in the configuration of the drainage channel below the staircase w1 of the opening-side low wall 631, and the other configuration. Are the same, and the explanation of the overlapping part is omitted.
The cooling device 50c for the electrical component pack shown in FIG. 10 is provided with a groove forming member 67 that is integrally inclined on the lower wall surface on the lower side of the staircase w1 following the opening-side low wall 631 of the intake passage low wall 63. This groove forming member 67 is provided in a pair on the left and right sides (see FIG. 10B) so as to be positioned on the left and right ends of the intake passage r1.
Each groove forming member 67 receives a foreign matter n such as a liquid falling from the through hole 68 of each step portion of the staircase w1 and flows it down to a foreign matter reservoir 69 below. The foreign matter reservoir 69 of the intake duct 53c is formed in a pocket shape, and is formed integrally with the left and right groove forming members 67. Foreign matter n such as liquid in the foreign matter reservoir 69 is removed outside the vehicle through a drain pipe 70 connected to the lower wall.

  The cooling device 50c for the electric component pack according to the fourth embodiment can prevent the high voltage components in the electric component pack from causing electric leakage, corrosion, or the like, similarly to the cooling device 50b for the electric component pack according to the third embodiment. In particular, the stair w1 of the intake channel low wall 63 can remove foreign matter n such as liquid removed from the air flow a through the through-hole 68 provided for each step portion directly through the groove forming member 67, and the step portions s1 to s4 can be removed. The foreign matter n such as a liquid can be reliably prevented from flowing downstream from the surface by the air flow a, and the function of removing the foreign matter n is further improved.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 1 Cooling device of electrical component pack 8 Electrical component pack 53 Intake duct 54 Intake opening 63 Intake passage low wall 631 Open side low wall r1 Intake passage s0, s0 'Stepped portion w1 Staircase P1 Intake opening P2 Top position

Claims (4)

The invention of claim 1 of the present application is mounted on a vehicle and accommodates an electrical component pack, and air in the vehicle is sucked from an intake opening, and the intake air flows as a cooling air along an intake passage, A duct for supplying the electrical component pack disposed at a position lower than the intake opening, and a cooling device for the electrical component pack,
The bottom surface of the intake passage is formed with a downward surface facing the lower side or a vertical wall surface erected vertically, which is inclined so that the upper side approaches the intake opening. Cooling system. In the cooling device of the electrical component pack according to claim 1,
A plurality of the downward surfaces or the vertical wall surfaces are formed on the bottom surface of the intake passage, the upward surfaces facing the upper surfaces provided between the plurality of downward surfaces or the vertical wall surfaces and the plurality of downward surfaces or the vertical wall surfaces. A cooling device for an electrical component pack, wherein a plurality of steps are formed. The cooling device for an electrical component pack according to claim 2,
The cooling device for an electrical component pack, wherein the plurality of step portions are formed so as to rise upward in a direction away from the intake opening. In the cooling device of the electrical component pack of any one of Claim 1 to 3,
The cooling device for an electrical component pack, wherein the intake opening is disposed so as to open toward a room of the vehicle.

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